17.04.020 Amendments Made in California Building Codes Parts 2, 2.5, 8, and 11.
A. Part 2 of the 2022 California Building Standards Code, California Building Code, as adopted in Section 17.04.010, is hereby amended to include the following additions, amendments and deletions:
California Building Code
Section 105.2, Item Building: 1, is hereby amended to read as follows:
105.2 Item Building: 1. One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses, provided the floor area is not greater than one hundred twenty square feet (120 sq.) (11 m2), there are no wall finishes such as, but not limited to, gypsum wallboard, plaster, stucco, or paneling placed on any interior surface of any wall and/or partition, and no electrical, mechanical or plumbing systems are contained within the structure. These structures are still regulated by Section 710A, despite exemption from permit.
Sections 115.1 and 115.2 are hereby amended to read as follows, and a new Section 115.5 is created:
115.1 Authority.
Where the building official finds any work regulated by this code being performed in a manner contrary to the provisions of this code or in a dangerous or unsafe manner, without a permit, beyond the scope of the issued permit, in violation of the Petaluma Municipal Code or Zoning Ordinance, the building official is authorized to issue a stop work order.
115.2 Issuance. The stop work order shall be in writing, be posted in a visible location near the location where the work is being conducted, and shall be given to the owner of the property, the owner’s authorized agent or the person performing the work. Upon issuance of a stop work order, the cited work shall immediately cease. The stop work order shall state the reason for the order and the conditions under which the cited work is authorized to resume.
115.5 Fee. An additional investigation fee of at least the permit fee and up to five times the permit fee shall be added to each permit subject to a stop work order according to the building official’s determination. Licensed contractors and repeat offenders are to be assessed investigation fee at five times the permit fee.
Chapter 2—Definitions
Section 202 is amended to amend and add the following:
Dwelling Unit, Junior Accessory, or JADU is a dwelling unit that is no more than 500 square feet in size and contained entirely within an existing single-family building. A JADU includes an efficiency kitchen, a separate entrance from the main entrance to the building, and an interior entry to the main living area. A JADU may include separate sanitation facilities, or may share sanitation facilities with the existing single-family building. A JADU does not contain complete independent living facilities without the attached primary dwelling.
Kitchen. Kitchen shall mean an area used, or designated to be used, for the preparation of food. The area shall include a sink, counter with storage space, and permanent or built-in provisions for food preparation and cooking. Permanent cooking appliance provisions shall be supplied with at least one electrical circuit greater than 120-Volt, or fuel gas outlet. Kitchens shall be provided with exhaust per the California Mechanical Code, plumbed per the California Plumbing Code, and wired per the California Electrical Code.
Kitchen, Efficiency. An efficiency kitchen shall mean an area used or designed to be used for the preparation of food. The area shall include a sink, a food preparation counter, storage cabinets, and a cooking facility with appliance having no electric utilization greater than 120-Volt and no fuel gas. Efficiency kitchens shall be vented per the mechanical code. Efficiency kitchens shall not be sufficient to constitute kitchen cooking facilities in a dwelling unit.
Substantial Improvement. Any repair, reconstruction, rehabilitation, alteration, addition or other improvement of a building or structure that is any of the following:
(1) An existing building or structure not classified as Group R-3 occupancy that undergoes any addition of floor area that is equal to or exceeds 10 percent of the existing gross floor area of the building or structure.
(2) An existing building or structure classified as a Group R-3 occupancy that undergoes any addition of floor area that is equal to or exceeds 50 percent of the existing gross floor area of the building or structure.
(3) An existing building or structure that undergoes any combination of repair, reconstruction, rehabilitation, alteration, addition or other improvement to floor area of the building or structure that is equal to or exceeds 50 percent of the existing gross floor area of the building or structure.
(4) If in the determination of the Building Official a building or structure has sustained substantial damage, as defined by Section 202 of the California Building Code as amended hereby, any combination of repair, reconstruction, rehabilitation, alteration, addition or other improvement are considered substantial improvement regardless of the actual work performed.
The Code Official shall aggregate any combination of repair, reconstruction, rehabilitation, alteration, addition, or other improvements to a building or structure within a three (3) year period, and if the combined affected gross floor area of the building or structure is equal to or exceeds 50% of gross floor area of the building or structure, the aggregated work shall constitute substantial improvement and the building shall be subject to the fire sprinkler requirement.
Nuisance Alarm. An unwarranted alarm caused by mechanical failure, malfunction, improper installation or lack of proper maintenance, system servicing testing, construction activities, ordinary household activities, false alarm, other cause when no such danger exists, or an alarm activated by a cause that cannot be determined.
Wildland-Urban Interface Fire Area (WUI). [SFM] (See California Building Code Chapter 7A, Section 702A and Chapter 49, Section 4902 of this code.)
Chapter 5—Fire Service Features
Section 505.1 is amended to read as follows:
505.1 Address Identification. New and existing buildings shall be provided with approved illuminated or other approved means of address identification. The address identification shall be legible and placed in a position that is visible from the street or road fronting the property. Address identification characters shall contrast with their background. Address numbers shall be Arabic numerals or alphabetic letters. Numbers shall not be spelled out. Character size and stroke shall be in accordance with Section 505.1.1 through 505.1.2. Where required by the fire code official, address identification shall be provided in additional approved locations to facilitate emergency response in accordance with this code and Section 505.1.3. Where access is by means of a private road and the building cannot be viewed from the public way or when determined by the fire code official, a monument, pole, or other approved sign or means shall be used to identify the structure. Address identification shall be maintained.
Section 505.1.1 is added to read as follows:
505.1.1 One- and Two-Family Dwellings. Numbers for one- and two-family dwellings shall be not less than four inches (4") (101.6 mm) high with a minimum stroke width of 0.5 inches (12.7 mm).
Section 505.1.2 is added to read as follows:
505.1.2 Numbers for Other Than One- and Two-Family Dwellings. Each address identification character shall not be less than twelve inches (12") high with a minimum stroke width of one inch (1"). Suite and unit directional numbers shall be not less than six inches (6") in height with a minimum stroke width of three-quarter inch (0.75"). Individual unit numbers shall not be less than four inches (4") in height with a minimum stroke width of one-half inch (1/2").
Section 505.1.3 is added to read as follows:
505.1.3 Complex Directory. Where two (2) or more buildings cannot be viewed from the public way or when determined by the Fire Code Official, an approved illuminated complex directory, monument pole, or other approved sign or means shall be used to identify the structures at the main entrances to the property.
Chapter 7—Fire Resistance-Rated Construction
Section 709 is added to read as follows:
709 Repair of Breaches of Non-Rated Walls/Ceilings in Fire Zone 1. Breaches, openings, holes or other broken wall and ceiling areas in buildings in "Fire Zone 1" (generally defined as the Downtown Business District) as defined in Section 17.22 of the Petaluma Municipal Code shall be repaired, restored or replaced when damaged, altered, breached, penetrated, removed or improperly installed. Openings/breaches can be repaired with like material such as lath and plaster, sheetrock, plywood or other reasonable barrier. The intent of this Section is to close openings/breaches to limit the spread of fire and products of combustion in the downtown business district buildings.
Chapter 9—Fire Protection Systems
901.7.6.1 is added to read as follows:
901.7.6.1 Problematic and Unreliable Fire Alarms. The Fire Code Official may determine a fire alarm to be unreliable upon receipt of three (3) nuisance alarms within a twelve-month period. Upon making such a finding, the Fire Code Official may order the following:
(a) For any nuisance alarm where the system is not restored, the system owner must provide Fire Watch Personnel in accordance with 403.12 or take such other measures as the Fire Code Official deems appropriate. Such measures shall remain in place until a fire department approved fire alarm maintenance firm certifies in writing to the Fire Code Official that the alarm system has been restored to a reliable condition. The Fire Code Official may require such tests as he/she deems necessary to demonstrate the adequacy of the system.
(b) Require the owner to pay mitigation fees pursuant to the City of Petaluma fee schedule.
902.1 Definitions.
Section 902.1 is amended to add the following:
Substantial Improvement.
Section 903.2 is amended to read as follows:
903.2 Where required. Approved automatic sprinkler systems in new buildings and structures shall be provided in the locations described in Sections 903.2.12 through 903.2.21. Approved automatic sprinkler systems in existing buildings and structures shall be provided in locations described in Section 903.6.
Exceptions:
1. Agricultural buildings as approved by the fire code official.
2. Detached accessory structures to Group R-3 not classified as a dwelling unit and not exceeding 1,000 square feet in gross floor area located at least 50 feet from applicable building.
3. Detached noncombustible motor vehicle fuel dispensing canopies.
4. Detached Group U Occupancies not greater than 1,000 square feet.
5. Special occupancy aircraft hangar shade structures as approved by the fire code official, unless required in NFPA 409.
903.2.1 Group A.
Section 903.2.1 is amended to read as follows:
903.2.1 Group A. An automatic sprinkler system shall be provided throughout buildings containing a Group A occupancy.
903.2.1.1 through 903.2.1.5.
Sections 903.2.1.1 through 903.2.1.5 are deleted.
903.2.1.6 Assembly occupancies on roofs.
Section 903.2.1.6 is amended to read as follows, with deletion of the exception:
903.2.1.6 Assembly occupancies on roofs. Where an occupied roof has an assembly occupancy an automatic sprinkler system shall be provided throughout the building in accordance with Section 903.3.1.1 or 903.3.1.2.
903.2.1.7 Multiple fire areas.
Section 903.2.1.7 is deleted.
903.2.2 Ambulatory care facilities.
Section 903.2.2 is amended to read as follows:
903.2.2 Ambulatory care facilities. An automatic sprinkler system shall be provided throughout buildings containing an ambulatory care facility.
903.2.3 Group E.
Section 903.2.3 is amended to read as follows:
903.2.3 Group E. An automatic sprinkler system shall be provided throughout buildings containing Group E occupancies. For public school state-funded construction projects or for public school campuses, Kindergarten through 12th grade, see Section 903.2.19 through 903.2.20.
903.2.4 Group F.
Section 903.2.4 is amended to read as follows:
903.2.4 Group F. An automatic sprinkler system shall be provided throughout buildings containing a Group F occupancy.
903.2.4.1 Woodworking operations.
Section 903.2.4.1 is deleted.
903.2.5.1 Group H.
Section 903.2.5.1 is amended to read as follows:
903.2.5.1 Group H. An automatic sprinkler system shall be installed throughout buildings containing Group H occupancies.
903.2.6.1 Group I-2.
Section 903.2.6.1 is deleted.
903.2.6.2 Group I-3.
Section 903.2.6.2 is amended to read as follows:
903.2.6.2 Group I-3. Every building where inmates or persons are in custody or restrained shall be protected by an automatic sprinkler system conforming to NFPA 13. The main sprinkler control valve or valves and all other control valves in the system shall be locked in the open position and electronically supervised so that at least an audible and visible alarm will sound at a constantly attended location when valves are closed. The sprinkler branch piping serving cells may be embedded in the concrete construction.
903.2.7 Group M.
Section 903.2.7 is amended to read as follows:
903.2.7 Group M. An automatic sprinkler system shall be provided throughout buildings containing a Group M occupancy where the gross floor area exceeds 500 square feet.
903.2.8.1 Group R-3.
Section 903.2.8.1 is amended to read as follows:
903.2.8.1 Group R-3. An automatic sprinkler system installed in accordance with Section 903.3.1.3 shall be permitted in Group R-3 occupancies and shall be provided throughout all one- and two-family dwellings regardless of square footage in accordance with the California Residential Code. An automatic sprinkler system shall be installed in all mobile homes, manufactured homes and multi-family manufactured homes with two or more dwelling units in accordance with Title 25 of the California Code of Regulations.
903.2.9 Group S.
Section 903.2.9 is amended to read as follows:
903.2.9 Group S. An automatic sprinkler system shall be provided throughout buildings containing a Group S occupancy.
903.2.9.1 through 903.2.9.2.
Sections 903.2.9.1 through 903.2.9.2 are deleted.
903.2.10 Group B.
Section 903.2.10 is amended to read as follows:
903.2.10 Group B. An automatic sprinkler system shall be provided throughout buildings containing a Group B occupancy where the gross floor area exceeds 500 square feet.
903.2.10.1 Commercial parking garage.
Section 903.2.10.1 is deleted.
903.2.11 Specific buildings areas and hazards.
Section 903.2.11 is amended to read as follows:
903.2.11 Specific buildings areas and hazards. In all occupancies other than detached Group U occupancies not greater than 1,000 square feet, an automatic sprinkler system shall be installed for building design or hazard in the locations set forth in Sections 903.2.11.1 through 903.2.11.8.
903.2.11.3 exception Nos. 1 and 2 deleted.
Section 903.2.11.3 exception Nos. 1 and 2 are deleted.
903.2.11.7 High-piled storage.
Section 903.2.11.7 is added to read as follows:
903.2.11.7 High-piled storage. An automatic sprinkler system shall be provided throughout buildings containing high-pile combustible storage.
903.2.11.8 Undetermined use design.
Section 903.2.11.8 is added to read as follows:
903.2.11.8 Undetermined use design. Automatic sprinkler systems installed in buildings or structures of undetermined use shall be designed and installed to have a minimum density of .33 gallons per minute per square foot over a minimum design area of 3,000 square feet.
903.2.18 Group U private garages and carports accessory to Group R-3 occupancies.
Section 903.2.18 is amended to read with the exception being deleted:
903.2.18 Group U private garages and carports accessory to Group R-3 occupancies. Carports with habitable space above and attached garages, accessory to Group R-3 occupancies, shall be protected by residential fire sprinklers in accordance with this section. Residential fire sprinklers shall be connected to, and installed in accordance with, an automatic residential fire sprinkler system that complies with R313 of The California Residential Code or with NFPA 13D. Fire sprinklers shall be residential sprinklers or quick-response sprinklers, designed to provide a minimum density of 0.05 gpm/ft2 over the most hydraulically demanding area of the structure, but not to exceed two sprinklers for hydraulic calculations purposes. Garage doors shall not be considered obstructions with respect to sprinkler placement.
Section 903.3 is amended as follows:
903.3 Installation Requirements. Sprinkler systems shall be designed and installed in accordance with NFPA-13, NFPA-13R (if approved by the Fire Code Official) and NFPA-13D. Pursuant to Section 102.7.1 and Section 105.1.4, the Fire Code Official may require additional sprinkler coverage to mitigate certain conditions such as access or water supply issues.
Section 903.3.1 is amended to read:
903.3.1 Design Criteria. Fire sprinkler systems installed in buildings of undetermined use shall be designed and installed to have a design density of .33 gallons per minute per square foot over a minimum design area of three thousand square feet (3,000' sq.). Where a subsequent occupancy change requires a system with greater capacity, it shall be the building owners’ responsibility to upgrade the system to the required density and meet any additional requirements of the Fire Code at the time of such change.
Section 903.3.7 is amended to read as follows:
903.3.7 Fire Department Connections. The location of fire department connections (FDCs) shall be within fifty feet (50') of a fire hydrant or as approved by the Fire Code Official. Approved locking caps shall be provided on any existing FDCs found to be vandalized and on new FDCs when determined by the Fire Code Official to be necessary because of site specific conditions or hazards.
Section 903.3.9 is amended to read as follows:
903.3.9 Floor control valve. Floor control valve and waterflow detection assemblies shall be installed at each floor where any of the following occur:
1. Buildings where the floor level of the highest story is located more than 30 feet above the lowest level of fire department access.
2. Buildings that are three or more stories in height.
3. Buildings that are two or more stories below the highest level of fire department access.
Exception: Group R-3 and R-3.1 occupancies floor control valves and waterflow detection assemblies shall not be required.
903.4 Sprinkler System Monitoring and Alarms. Except for Group R, Division 3 Occupancies, all valves controlling the water supply for automatic sprinkler systems, pumps, tanks, water levels, temperatures, critical air pressure and water flow switches shall be electronically supervised. Valves when used for standpipes are excluded from this provision unless required by the Fire Code Official.
Section 903.4.2 is amended to read as follows:
903.4.2 Alarms. One (1) exterior approved audible device shall be connected to every automatic fire sprinkler system in an approved location. The Fire Code Official may require one (1) exterior audible and visual device connected to an automatic fire sprinkler system in an approved location based on site specific conditions. Such sprinkler water flow alarm devices shall be activated by water flow equivalent to the flow of a single sprinkler of the smallest orifice size installed in the system. Where a building fire alarm system is installed, actuation of the automatic fire sprinkler system shall actuate the building fire alarm system.
903.6 Where required in existing buildings and structures.
Section 903.6 is amended to read as follows:
903.6 Where required in existing buildings and structures. An automatic sprinkler system shall be provided throughout existing buildings and structures where required in Chapter 11 and as required in this section.
Exception: Alterations made solely for the purpose of providing barrier removal pursuant to the requirements of the Americans with Disabilities Act (ADA) as contained in exception #4 of Section CBC 11B-204.2.
903.6.1 Buildings that undergo a substantial improvement.
903.6.2 Changes of Occupancy. When any change of occupancy occurs where the proposed new occupancy classification is more hazardous based on fire and life safety risks as determined by the Fire Code Official including, but not limited to, the conversion of residential buildings to condominiums, the building shall meet the fire sprinkler requirements for a newly constructed building.
903.6.3 Residential Conversions. Fire sprinkler systems shall be installed in all single-family dwellings that are converted to duplexes and/or multi-family dwellings, bed and breakfasts, inns, lodging houses or similar uses. Fire sprinkler systems shall be installed in all conversions of a detached garage into living space or sleeping space.
903.6.4 Elevation of Existing Buildings. An automatic fire extinguishing system shall be installed throughout all existing buildings when the building is elevated to three (3) or more stories or more than thirty-five feet (35') in height, from grade to the exposed roof.
Exceptions: An automatic fire-extinguishing system need not be provided when the area above thirty-five feet (35') is provided for aesthetic purposes only and is a non-habitable space.
903.6.5 Installation of Automatic Fire Sprinklers in Pre-Existing Buildings (Historic Downtown Business District).
1. Geographic Boundary—Historic Downtown Business District: For the purposes of this section, the Historic Downtown Business District shall include all buildings located inside the geographic area generally formed by Kentucky Street to the west, Washington Street to the north, the Petaluma River to the east and B Street to the south. Also included in this section is 201 Washington Street (Phoenix Theater) and 132 Keller Street, as more particularly described in Figure 1003.2.12.
2. Installation Requirements: An automatic sprinkler system conforming to the Standard for the Installation of Sprinkler Systems (NFPA-13) shall be installed in all existing buildings in the Historic Downtown Business District in accordance with the following criteria:
2.1. Kentucky Street and Western Avenue:
2.1.1. In any building wherein a change of occupancy occurs.
2.1.2. In any building or occupancy where the square footage of the building or occupancy is increased or alterations to the structure are made pursuant to Section 903.6 of this Ordinance.
2.1.3. All buildings with basements or space below street grade used for storage, business or public use shall have automatic fire sprinklers installed within the basements or the below street grade areas no later than December 31, 2010.
2.1.4. All buildings not meeting the criteria of 2.1.1 or 2.1.2 above shall have automatic fire sprinklers installed throughout the structure, including all public, private, storage and/or concealed spaces, as defined by the Standard for the Installation of Sprinkler Systems (NFPA-13) by no later than December 31, 2016.
2.2. Petaluma Boulevard North: An appropriately sized water main and laterals were installed by the City of Petaluma on August 9, 2017. Automatic fire sprinkler requirements became effective and are required to be installed by the dates listed in the sections below. Notice has been sent by the City of such installation requirement. An automatic sprinkler system conforming to the Standard for the Installation of Sprinkler Systems (NFPA-13) shall be installed according to the following criteria:
2.2.1. In any building wherein a change of occupancy occurs.
2.2.2. In any building or occupancy where the square footage of the building or occupancy is increased or alterations to the structure are made pursuant to Section 903.6 of this Ordinance.
2.2.3. All buildings with basements or space below street grade used for storage, business or public use shall have automatic fire sprinklers installed within the basements or the below street grade areas, no later than December 31, 2023.
2.2.4. All buildings not meeting the criteria of 2.2.1 or 2.2.2 above shall have automatic fire sprinklers installed throughout the structure, including all public, private, storage and/or concealed spaces, as defined by the Standard for the Installation of Sprinklers (NFPA-13), no later than December 31, 2029.
2.3. Property Owner’s Responsibility for System Installation:
2.3.1. The Property Owner shall be responsible for installation of the lateral service from the curb line into the building. This also includes isolation, check or other valves or devices, as applicable.
2.3.2. The Property Owner shall be responsible for the installation of the automatic fire sprinkler system according to the Standard for the Installation of Sprinkler Systems (NFPA-13).
2.4. Plans and Specifications: Plans and Calculations (NFPA-13, Chapter 8) for the service lateral and fire sprinkler system shall be submitted to and approved by the Fire Prevention Bureau prior to installation of equipment and materials.
2.4.1. For the Kentucky Street installations that are required on or before December 31, 2010, or December 31, 2016, all Plans and Calculations for service lateral and sprinkler systems shall be submitted no later than June 30, 2010, or June 30, 2016, respectively, with installation and approval of work to occur prior to December 31, 2010, or December 31, 2016, respectively.
2.4.2. For Petaluma Boulevard North installations that are required on or before December 31, 2023, or December 31, 2029, all Plans and Calculations for service lateral and sprinkler systems shall be submitted no later than June 30, 2023, or June 30, 2029, respectively, with installation and approval of work to occur prior to December 31, 2023, or December 31, 2029, respectively.
Section 905.3.1 is amended to read as follows:
905.3.1 Building Height. Class I standpipes shall be installed in buildings three stories or over in height and/or if, in the opinion of the Fire Chief, a hazard or condition exists in which the installation of standpipes would improve firefighting operations. Standpipes will be provided with approved outlets provided on each floor level, including the roof when roof access is provided.
Section 905.9: exception 2 is deleted.
Section 907.8.5.1 is added to read as follows:
907.8.5.1 Fire Alarm Service Stickers/Tags. Upon completion of each annual fire alarm service, the fire alarm contractor providing the service shall affix a sticker or tag to the main fire alarm panel which indicates the name of the fire alarm company and the date of the service.
Chapter 12—Interior Environment
Section 1208.4 is amended to read as follows:
1208.4 Efficiency dwelling units. [HCD 1] As hereby modified by local ordinance pursuant to Health and Safety Code Section 17958.1, efficiency dwelling units shall comply with the following:
1. The unit shall have a living room of not less than 150 square feet (17.7 m2) of floor area. An additional 100 square feet of floor area shall be provided for each occupant in excess of two.
2. The unit shall be provided with a separate closet.
3. For other than Accessible, adaptable dwelling units, the unit shall be provided with a kitchen sink, cooking appliance and refrigerator, each having a clear working space of not less than 30 inches (762 mm) in front. Light and ventilation conforming to this code shall be provided.
4. The unit shall be provided with a separate bathroom containing a water closet, lavatory and bathtub or shower.
Chapter 15 Roof Assemblies and Rooftop Structures
Section 1505.1 is amended to read as follows:
1505.1 General. Roof assemblies shall be minimum Class A roof assemblies. Class A roof assemblies and roof coverings required to be listed by this section shall be tested in accordance with ASTM E108 or UL 790. In addition, fire-retardant-treated wood roof coverings shall be tested in accordance with ASTM D2898.
Exception: Skylights and sloped glazing that comply with Chapter 24 or Section 2610.
Table 1505.1 is deleted.
Section 1505.1.1 is amended to read as follows, with the exception deleted:
1505.1.1 Roof coverings within very-high fire hazard severity zones, state responsibility areas and all other areas. The entire roof covering of every existing structure where more than 50 percent of the total roof area is replaced within any one-year period, the entire roof covering of every new structure and any roof covering applied in the alteration, repair or replacement of the roof of every existing structure, shall be fire-retardant covering that is at least Class A.
Sections 1505.1.2 and 1505.1.3 are deleted.
Sections 1505.3, 1505.4, and 1505.5 are deleted.
Section 1505.6 is amended to add the following exception:
Exception: Fire-retardant-treated wood shingles and shakes are prohibited in wildland-urban interface areas.
Table 1505.7 is amended to add the following exception:
Exception: Fire-retardant-treated wood shingles and shakes are prohibited in wildland-urban interface areas.
Chapter 18—Soils and Foundations
Section 1803.1.1 is amended as follows:
A preliminary soil report, prepared by a civil engineer who is registered by the state shall be provided for each subdivision. The report shall be based upon adequate test borings or excavations, of every subdivision, where a tentative and final map is required pursuant to Section 66426 of the Government Code.
The preliminary soil report may be waived if the building department of the city, county, or city and county, or other enforcement agency charged with the administration and enforcement of the provisions of Section 1803.1.1, shall determine that, due to the knowledge such department has as to the soil qualities of the soil of the subdivision or lot, no preliminary analysis is necessary.
Section 1803.1.1.2 is amended as follows:
1803.1.1.2. Soil investigation by lot, necessity, preparation and recommendations. If the preliminary soil report indicates the presence of critically expansive soils or other soil problems which, if not corrected, would lead to structural defects, a soil investigation of each lot in the subdivision is required.
The soil investigation shall be prepared by a civil engineer who is registered in this state. It shall recommend corrective action which is likely to prevent structural damage to each dwelling proposed to be constructed on the site where hazardous soil conditions are present. For each specific construction site or lot, the geotechnical engineer shall provide such investigation and recommendations, or letter of exemption from this section.
1803.1.1.3. Approval, building permit conditions, appeal.
The building department or other enforcement agency charged with the administration and enforcement of the provisions of Section 1803.1.1, shall approve the soil investigation if it determines that the recommended action is likely to prevent structural damage to each dwelling to be constructed. A condition to the building permit, shall require that the approved recommended action be incorporated in the construction of each dwelling. Appeal from such determination shall be to the local appeals board.
B. Part 2.5 of the 2022 California Building Standards Code, California Residential Code, as adopted in Section 17.04.010, is hereby amended to include the following additions, amendments, and deletions:
California Residential Code
Section R105.2, Building 1, is hereby amended to read as follows:
R105.2. Building 1. One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses, provided the floor area is not greater than one hundred twenty square feet (120 sq.) (11 m2), there are no wall finishes such as, but not limited to, gypsum wallboard, plaster, stucco, or paneling placed on any interior surface of any wall and/or partition, and no electrical, mechanical or plumbing systems are contained within the structure. These structures are still regulated by Section 710A, despite exemption from permit.
Section R114.1 and R114.2 are hereby amended to read as follows. A new section R114.5 is created:
R114.1 Authority. Where the building official finds any work regulated by this code being performed in a manner contrary to the provisions of this code or in a dangerous or unsafe manner, without a permit, beyond the scope of the issued permit, in violation of the Petaluma Municipal Code or Zoning Ordinance, the building official is authorized to issue a stop work order.
R114.2 Issuance. The stop work order shall be in writing, be posted in a visible location near the location where the work is being conducted, and shall be given to the owner of the property, the owner’s authorized agent or the person performing the work. Upon issuance of a stop work order, the cited work shall immediately cease. The stop work order shall state the reason for the order and the conditions under which the cited work is authorized to resume.
R114.5 Fee. An additional investigation fee of at least the permit fee and up to five times the permit fee shall be added to each permit subject to a stop work order according to the building official’s determination. Licensed contractors and repeat offenders are to be assessed investigation fee at five times the permit fee.
Chapter 2—Definitions
Section R202, General Definitions, is amended to amend and add the following:
Dwelling Unit, Junior Accessory, or JADU is a dwelling unit that is no more than 500 square feet in size and contained entirely within an existing single-family building. A JADU includes an efficiency kitchen, a separate entrance from the main entrance to the building, and an interior entry to the main living area. A JADU may include separate sanitation facilities, or may share sanitation facilities with the existing single-family building. A JADU does not contain complete independent living facilities without the attached primary dwelling.
Kitchen. Kitchen shall mean an area used, or designated to be used, for the preparation of food. The area shall include a sink, counter with storage space, and permanent or built-in provisions for food preparation and cooking. Permanent cooking appliance provisions shall be supplied with at least one electrical circuit greater than 120-Volt, or fuel gas outlet. Kitchens shall be provided with exhaust per the California Mechanical Code, plumbed per the California Plumbing Code, and wired per the California Electrical Code.
Kitchen, Efficiency. An efficiency kitchen shall mean an area used or designed to be used for the preparation of food. The area shall include a sink, a food preparation counter, storage cabinets, and a cooking facility with appliance having no electric utilization greater than 120-Volt and no fuel gas. Efficiency kitchens shall be vented per the mechanical code. Efficiency kitchens shall not be sufficient to constitute kitchen cooking facilities in a dwelling unit.
Substantial Improvement. Any repair, reconstruction, rehabilitation, alteration, addition or other improvement of a building or structure that is any of the following:
(1) An existing building or structure not classified as Group R-3 occupancy that undergoes any addition of floor area that is equal to or exceeds 10 percent of the existing gross floor area of the building or structure.
(2) An existing building or structure classified as a Group R-3 occupancy that undergoes any addition of floor area that is equal to or exceeds 50 percent of the existing gross floor area of the building or structure.
(3) An existing building or structure that undergoes any combination of repair, reconstruction, rehabilitation, alteration, addition or other improvement to floor area of the building or structure that is equal to or exceeds 50 percent of the existing gross floor area of the building or structure.
(4) If in the determination of the Building Official a building or structure has sustained substantial damage, as defined by Section 202 of the California Building Code as amended hereby, any combination of repair, reconstruction, rehabilitation, alteration, addition or other improvement are considered substantial improvement regardless of the actual work performed.
The Code Official shall aggregate any combination of repair, reconstruction, rehabilitation, alteration, addition, or other improvements to a building or structure within a three (3) year period, and if the combined affected gross floor area of the building or structure is equal to or exceeds 50% of gross floor area of the building or structure, the aggregated work shall constitute substantial improvement and the building shall be subject to the fire sprinkler requirement.
Nuisance Alarm. An unwarranted alarm caused by mechanical failure, malfunction, improper installation or lack of proper maintenance, system servicing testing, construction activities, ordinary household activities, false alarm, other cause when no such danger exists, or an alarm activated by a cause that cannot be determined.
Wildland-Urban Interface Fire Area (WUI). [SFM] (See California Building Code Chapter 7A, Section 702A and Chapter 49, Section 4902 of this code for defined term.)
Chapter 3—Building Planning
Section R301.2 is amended by inserting the following Table R301.2(1).
Table R301.2(1). CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
GROUND SNOW LOADo
0
WIND DESIGN
(mph)d
110
Topographick
NO
Special windl
NO
Windbornem
N/A
SEISMIC DESIGN CATEGORYf
D2 or E
SUBJECT TO DAMAGE FROM
Weatheringa
Negligible
Frost line depthb
12 inches
Termitec
Yes
WINTER DESIGN TEMPe
32 degrees F
ICE BARRIER UNDERLAYMENT REQUIREDh
NO
FLOOD HAZARDSg
Initial NFIP Map Date: March 8, 1974.
Initial FIRM date: February 15, 1980.
Current Flood Insurance Study dated: February 19, 2014.
Panels 982, 1001, 1002, 1003, and 1004 are dated October 2, 2015.
Panels 891, 893, 894, and 913 are dated February 19, 2014.AIR FREEZING INDEXi
1 degree F
MEAN ANNUAL TEMPj
58 degrees F
MANUAL J DESIGN CRITERIAn
Elevation
Latitude
Winter heating
Summer cooling
Altitude correction factor
Indoor design temperature
Design temperature cooling
Heating temperature difference
87 FT
38 degrees North.
29 degrees F.
90 degrees F.
N/A
68 degrees F.
75 degrees F.
39 degrees F.
Cooling temperature difference
Wind velocity heating
Wind velocity cooling
Coincident wet bulb
Daily range
Winter humidity
Summer humidity
—
15 degrees F.
N/A
N/A
67 degrees F.
High. 31 degrees F.
N/A
N/A
—
For SI: 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447 m/s.
aWhere weathering requires a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code, the frost line depth strength required for weathering shall govern.
The weathering column shall be filled in with the weathering index, “negligible,” “moderate” or “severe” for concrete as determined from Figure R301.2(4). The grade of masonry units shall be determined from ASTM C34, C55, C62, C73, C90, C129, C145, C216 or C652.
bWhere the frost line depth requires deeper footings than indicated in Figure R403.1(1), the frost line depth strength required for weathering shall govern. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade.
cThe jurisdiction shall fill in this part of the table to indicate the need for protection depending on whether there has been a history of local subterranean termite damage.
dThe jurisdiction shall fill in this part of the table with the wind speed from the basic wind speed map [Figure R301.2(5)A]. Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4.
eThe outdoor design dry-bulb temperature shall be selected from the columns of 97-1/2 -percent values for winter from Appendix D of the International Plumbing Code. Deviations from the Appendix D temperatures shall be permitted to reflect local climates or local weather experience as determined by the building official. [Also see Figure R301.2(1).]
fThe jurisdiction shall fill in this part of the table with the seismic design category determined from Section R301.2.2.1.
gThe jurisdiction shall fill in this part of the table with (a) the date of the jurisdiction’s entry into the National Flood Insurance Program (date of adoption of the first code or ordinance for management of flood hazard areas), (b) the date(s) of the Flood Insurance Study and (c) the panel numbers and dates of the currently effective FIRMs and FBFMs or other flood hazard map adopted by the authority having jurisdiction, as amended.
hIn accordance with Sections R905.1.2, R905.4.3.1, R905.5.3.1, R905.6.3.1, R905.7.3.1 and R905.8.3.1, where there has been a history of local damage from the effects of ice damming, the jurisdiction shall fill in this part of the table with “YES.” Otherwise, the jurisdiction shall fill in this part of the table with “NO.”
iThe jurisdiction shall fill in this part of the table with the 100-year return period air freezing index (BF-days) from Figure R403.3(2) or from the 100-year (99 percent) value on the National Climatic Data Center data table “Air Freezing Index-USA Method (Base 32°F).”
jThe jurisdiction shall fill in this part of the table with the mean annual temperature from the National Climatic Data Center data table “Air Freezing Index-USA Method (Base 32°F).”
kIn accordance with Section R301.2.1.5, where there is local historical data documenting structural damage to buildings due to topographic wind speed-up effects, the jurisdiction shall fill in this part of the table with “YES.” Otherwise, the jurisdiction shall indicate “NO” in this part of the table.
lIn accordance with Figure R301.2(5)A, where there is local historical data documenting unusual wind conditions, the jurisdiction shall fill in this part of the table with “YES” and identify any specific requirements. Otherwise, the jurisdiction shall indicate “NO” in this part of the table.
mIn accordance with Section R301.2.1.2 the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the jurisdiction shall indicate “NO” in this part of the table.
nThe jurisdiction shall fill in these sections of the table to establish the design criteria using Table 1a or 1b from ACCA Manual J or established criteria determined by the jurisdiction.
oThe jurisdiction shall fill in this section of the table using the Ground Snow Loads in Figure R301.2(6).
Section R309.6 exception is deleted.
Section R313.1 is amended, with the exceptions replaced as follows:
R313.1 Townhouse automatic fire sprinkler systems. An automatic residential fire sprinkler system shall be installed in townhouses and multi-family manufactured homes with two or more dwelling units in accordance with Title 25 of the California Code of Regulations.
Exceptions:
1. Accessory Dwelling Unit, provided that all of the following are met:
1.1 The unit meets the definition of an Accessory Dwelling Unit as defined in Government Code Section 65852.2.
1.2 The existing primary residence does not have automatic fire sprinklers.
1.3 The accessory detached dwelling unit does not exceed 1,200 square feet in size.
1.4 The unit is on the same lot as the primary residence.
1.5 The accessory dwelling unit is not attached to garages or has habitable space above carports.
1.6 The accessory dwelling unit meets the requirements of California Fire Code, Sections 503.1.1 and 507.5.1.
2. Detached accessory structures to Group R-3 not classified as a dwelling unit and not exceeding 1,000 square feet in gross floor area located at least 50 feet from applicable building.
3. Detached Group U Occupancies not greater than 1,000 square feet.
Section R313.1.2 is added as follows:
R313.1.2 Substantial improvement. An automatic fire sprinkler system shall be provided throughout all Townhouses that undergo a substantial improvement.
Section R313.2 is amended to read as follows, with the exception deleted:
R313.2 One- and two-family dwellings automatic fire sprinkler systems. An automatic residential fire sprinkler system shall be installed in townhouses. Group R-3 occupancies permitted under this code shall be provided throughout regardless of square footage with an automatic sprinkler system inclusive of all mobile homes, manufactured homes and multi-family manufactured homes with two or more dwelling units in accordance with Title 25 of the California Code of Regulations.
Exceptions:
1. Accessory Dwelling Unit, provided that all of the following are met:
1.1. The unit meets the definition of an Accessory Dwelling Unit as defined in the Government Code Section 65852.2.
1.2. The existing primary residence does not have automatic fire sprinklers.
1.3. The accessory detached dwelling unit does not exceed 1,200 square feet in size.
1.4. The unit is on the same lot as the primary residence.
1.5. The accessory dwelling unit is not attached to garages or has habitable space above carports.
1.6. The accessory dwelling unit meets the requirements of California Fire Code, Sections 503.1.1 and 507.5.1.
2. Detached accessory structures to Group R-3 not classified as a dwelling unit and not exceeding 1,000 square feet in gross floor area located at least 50 feet from applicable building.
3. Detached Group U Occupancies not greater than 1,000 square feet.
Section R313.2.2 is added as follows:
R313.2.2 Substantial improvement. An automatic fire sprinkler system shall be provided throughout all one- and two-family dwellings that undergo a substantial improvement.
Section R337.2 amends the following definition:
Wildland-Urban Interface Fire Area. A geographical area identified by the City of Petaluma as a “Fire Hazard Severity Zone” in accordance with the Public Resources Code, Sections 4201 through 4204, and Government Code, Sections 51175 through 51189, or other areas designated by the enforcing agency to be at a significant risk from wildfires, as designated on the map titled Wildland-Urban Interface Fire Area, dated January 28, 2009.
Chapter 4—Foundations
Section R401.1 is amended as follows:
R401.4.1.1 General and where required for applications listed in Section 1.8.2.1.1 regulated by the Department of Housing and Community Development. Foundations and soils investigations shall be conducted in conformance with Health and Safety Code Sections 17953 through 17957 as summarized below.
A preliminary soil report, prepared by a civil engineer who is registered by the state shall be provided for each subdivision. The report shall be based upon adequate test borings or excavations, of every subdivision, where a tentative and final map is required pursuant to Section 66426 of the Government Code.
The preliminary soil report may be waived if the building department of the city, county, or city and county, or other enforcement agency charged with the administration and enforcement of the provisions of Section R401.4.1.1, shall determine that, due to the knowledge such department has as to the soil qualities of the soil of the subdivision or lot, no preliminary analysis is necessary.
Section R401.4.1.1.2 is amended as follows:
R401.4.1.1.2 Soil investigation by lot, necessity, preparation and recommendations.
If the preliminary soil report indicates the presence of critically expansive soils or other soil problems, which if not corrected, would lead to structural defects, a soil investigation of each lot in the subdivision is required.
The soil investigation shall be prepared by a civil engineer who is registered in this state. It shall recommend corrective action which is likely to prevent structural damage to each dwelling proposed to be constructed on the site where hazardous soil conditions are present. For each specific construction site or lot, the geotechnical engineer shall provide such investigation and recommendations, or letter of exemption from this section based on site and lot specific soil conditions supporting such letter of exemption.
Section R401.4.1.1.3 is amended as follows:
R401.4.1.1.3. Approval, building permit conditions, appeal.
The building department or other enforcement agency charged with the administration and enforcement of Section 401.4.1.1, shall approve the soil investigation if it determines that the recommended action is likely to prevent structural damage to each dwelling to be constructed. A condition to the building permit, shall require that the approved recommended action be incorporated in the construction of each dwelling. Appeal from such determination shall be to the local appeals board.
Chapter 9—Roof Assemblies
Section R902.1 is amended to read as follows:
R902.1 Roof covering materials. Roofs shall be covered with materials as set forth in Section R904 and R905. A minimum Class A roofing shall be installed in all areas. Class A roofing required by this section to be listed shall be tested in accordance with UL 790 or ASTM E108.
Section R902.1.1 is amended to read as follows:
R902.1.1 Roof coverings within very-high fire hazard severity zones, state responsibility areas and all other areas. The entire roof covering of every existing structure where more than 50 percent of the total roof area is replaced within any one-year period, the entire roof covering of every new structure and any roof covering applied in the alteration, repair or replacement of the roof of every existing structure, shall be fire-retardant covering that is at least Class A.
Section R902.2 is amended to add the following exception:
Exception: Fire-retardant-treated wood shingles and shakes are prohibited in wildland-urban interface areas.
Table R902.4 is amended to add the following exception:
R902.4 Rooftop-mounted photovoltaic panel systems. Rooftop-mounted photovoltaic panel systems installed on or above the roof covering shall be tested, listed and identified with a fire classification in accordance with UL 1703 and UL 2703. Class A photovoltaic panel systems and modules shall be installed in all areas, in jurisdictions designated by law as requiring their use.
C. Part 8 of the 2022 California Building Standards Code, California Historical Building Code, as adopted in Section 17.04.010, is hereby amended to include the following additions, amendments and deletions:
California Historical Building Code
Section 8-410.1 is amended to read as follows: (exception added)
Exception: Historical Buildings within the Historic Downtown Business District shall comply with Petaluma Municipal code Section 903.6.5
D. Part 11 of the 2022 California Building Standards Code, California Green Building Standards Code, as adopted in Section 17.04.010, is hereby amended to include the following additions, amendments, and deletions:
California Green Building Standards Code
Appendix A4, Division A4.2 Energy Efficiency is deleted.
Appendix A5, Division A5.2 Energy Efficiency is deleted.
(Ord. 2834 NCS §§1, 3, 2023.)