Piedmont Municipal Code Div. 8.02 Adoption of California Building Standards

8.02.020 2025 California Residential Code (Part 2.5) – Amendments 8.02.030 2025 California Building Code (Part 2) - Amendments 8.02.040 2025 California Mechanical Code (Part 4) – Amendments 8.02.050 2025 California Plumbing Code (Part 5) – Amendments 8.02.060 2025 California Electrical Code (Part 3) – Amendments 8.02.070 2025 California Energy Code (Part 6) – Amendments 8.02.080 2025 California Green Building Standards Code (Part 11) - Amendments
8.02.090 2025 California Fire Code (Part 9) – Amendments 8.02.100 2025 California Wildland-Urban Interface Code (Part 7) - Amendments

The following 2025 California Building Standards Code, California Code of Regulations, Title 24, is hereby adopted by reference, as more specifically identified below. A copy of these codes will be kept on file at the Planning & Building Department.

A. 2025 California Residential Code, Part 2.5 of Title 24 of the California Code of Regulations, including Appendices BB, BF, BG, BJ, BK, BL, BO, CI, and CJ.

B.
2025 California Building Code, Part 2 of Title 24 of the California Code of Regulations, Volumes 1 and 2 and Appendices H, I, J, P and Q.

C. 2025 California Mechanical Code, Part 4 of Title 24 of the California Code of Regulations, including its appendices.

D. 2025 California Plumbing Code, Part 5 of Title 24 of the California Code of Regulations, and its appendices.

E. 2025 California Electrical Code, Part 3 of Title 24 of the California Code of Regulations, and its annexes.

F. 2025 California Energy Code, Part 6 of Title 24 of the California Code of Regulations including all of its appendices.

G. 2025 California Green Building Standards Code, Part 11 of Title 24 of the California Code of Regulations, including all of its appendices.

H. 2025 California Referenced Standards Code, Part 12 of Title 24 of the California Code of Regulations, including all of its appendices.

Chapter 8 – Building, Construction, and Fire Prevention

I. 2025 California Administrative Code, Part 1 of Title 24 of the California Code of Regulations, and its appendices.

J. 2025 California Historical Building Code, Part 8 of Title 24 of the California Code of Regulations, including all of its appendices.

K. 2025 California Existing Building Code, Part 10 of Title 24 of the California Code of Regulations, including all of its appendices.

L.
2025 California Fire Code, Part 9 of Title 24 of the California Code of Regulations, as adopted and/or amended by the office of the California State Fire Marshal, including Appendices B, C, D, E, H, I, L, and N.

M. 2025 California Wildland-Urban Interface Code, Part 7 of Title 24 of the California Code of Regulations, as adopted and/or amended by the office of the California State Fire Marshal, including Appendices F, and G.

8.02.020 2025 California Residential Code (Part 2.5) – Amendments

This section amends the 2025 California Residential Code as adopted in Section 8.02.010, as set forth below. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

A. Section R105.1 – Permits Required. Section R105.1 is amended to add the following provisions: “A building permit is also required for the following:

an on-grade improvement capable of use for parking vehicles and located in the street yard setback.

on-grade stairs with four or more risers that are part of the primary entrance/exit to and from the structure.

construction, repair or replacement of a public sidewalk, curb or gutter.

alterations and property improvements which have received or require design review approval from the City of Piedmont.”

B. Section R105.2 – Work Exempt from Permit. The text of Section R105.2 is deleted and replaced in its entirety with the following:

Chapter 8 – Building, Construction, and Fire Prevention “R105.2 Work Exempt from Permit. A permit is not required for the following.
An exemption from the permit requirements does not authorize any work in violation of this code or any other city laws.

Also, unless otherwise exempted, if separate plumbing, electrical and mechanical construction is required as part of the construction of the exempted items, a separate building permit for the plumbing, electrical and mechanical construction is required for the following exempted items.

Building

a. One-story detached accessory structures used as a tool or storage shed, playhouse or similar use, provided the floor area does not exceed 120 square feet, except as regulated by the California Wildland Urban-Interface Code, Part 7.

b. A fence 6 feet high or less.

c. A retaining wall which is not over 30 inches in height, measured from the top of the footing to the top of the wall, unless supporting a surcharge.

d. A movable case, counter or partition not over 5 feet 9 inches high.

e. A platform, walk or driveway not more than 12 inches above grade and not over a basement or story below.

f. Painting, papering, tiling, carpeting, cabinets, counter tops and similar finish work.

g. Swings and other playground equipment.

h. Window awnings supported by an exterior wall that do not project more than 54 inches from the exterior wall and do not require additional support.

Electrical

a. Listed cord-and-plug connected temporary decorative lighting.

b. Reinstallation of attachment plug receptacles but not the outlets for them.

c. Repair or replacement of branch circuit overcurrent devices of the required capacity in the same location.

d. Electrical wiring, devices, appliances, apparatus or equipment operating at less than 25 volts and not capable of supplying more than 50 watts of energy.

Chapter 8 – Building, Construction, and Fire Prevention e. Minor repair work, including the replacement of lamps or the connection of approved portable electrical equipment to approved permanently installed receptacles

3. Gas

a. Portable heating, cooking or clothes drying appliances.

b. Replacement of any minor part that does not alter approval of equipment or make the equipment unsafe.

c. Portable-fuel-cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.

4. Mechanical

a. Portable heating appliances.

b. Portable ventilation appliances.

c. Portable cooling units.

d. Steam, hot- or chilled-water piping within any heating or cooling equipment regulated by this code.

e. Replacement of any minor part that does not alter approval of equipment or make the equipment unsafe.

f. Portable evaporative coolers.

g. Self-contained refrigeration system containing 10 pounds or less of refrigerant or that are actuated by motors of 1 horsepower or less.

h. Portable-fuel-cell appliance that are not connected to a fixed piping system and are not interconnected to a power grid.

5. Plumbing

a. The stopping of leaks in drains, water, soil, waste or vent pipe; provided, however, that if any concealed trap, drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the same with new material, such work shall be considered as new work and a permit shall be obtained and inspection made as provided in this code.

Chapter 8 – Building, Construction, and Fire Prevention b. The clearing of stoppages or the repairing of leaks in pipes, valves, or fixtures, and the removal and reinstallation of toilets, provided such repairs do not involve or require the replacement or rearrangement of valves, pipes or fixtures.”

C. Section R109.1 – Types of Inspections. Section R109.1 is amended to add a new paragraph to the end of Section R109.1 to read as follows: “The Building Official may require a survey of the lot to verify that the structure is located in accordance with the approved plans. In the case of a new residence or a detached structure, the Building Official will require a survey by a licensed land surveyor before approving the foundation. The foundation survey must include the related setbacks, the elevation of the existing grades, and the elevations of the foundation. At the completion of the framing and roof sheathing, the survey must include the elevations of all floors and the maximum roof height, to verify that the structure is built according to the approved drawings.”

D.
Section R112.1 – General. Section R112.1 – General is replaced in its entirety to read as follows:

“R112.1
General. In order to hear and decide appeals of orders, decisions or determinations made by the building official relative to the application and interpretation of this code, there is a board of appeals. In accordance with the Health and Safety Code sections 17920.5 and 17920.6, the board of appeals shall be the City of Piedmont Planning Commission. The board will adopt rules of procedure for conducting its business, and will render decisions and findings in writing to the appellant with a duplicate copy to the building official.”

E. Section R202 – Definitions. Section R202 – Definitions is amended to replace the definition of crawlspace with the following, and add the following definition of Crawl Space and Home Energy Score:

“ CRAWL SPACE. An underfloor space with a maximum height of 5 feet that is not a basement.

HOME ENERGY SCORE. Home Energy Score means the score provided by a Home Energy Score Certified Assessor following an assessment of a property, using the Home Energy Score Scoring Methodology developed by the U.S. Department of Energy.”

F. Section R302.16 – Deck Fire Protection. Section R302.16 is added to the 2025 California Residential Code to read in its entirety:

“R302.16 Deck Fire Protection. Except for a deck that is more than 10 feet from a structure regulated by this code, the exposed underside of a deck must be protected by the installation of materials approved for one-hour fire-resistant construction on the horizontal exterior underside.

Exceptions:

Chapter 8 – Building, Construction, and Fire Prevention 1. Where the deck is less than one foot above grade.

Where the underdeck area is equipped with an automatic fire suppression system which complies with Section R309.

Where exterior walls enclose the underside of the deck completely to grade.

A balcony or deck which is constructed as follows: Horizontal framing members are of size 4 inches x 8 inches (nominal) and larger Posts are of size 6 inches x 6 inches (nominal) and larger Decking: Conforming to requirements in Section 709A, Decking

A deck constructed over permanent noncombustible material which extends at least 3 feet beyond the edge of the deck and prevents the growth of plant material.

The alteration or repair of an existing deck or balcony must meet the above requirements, except that if the number of linear feet of horizontal framing members to be repaired and replaced is less than 25% of the total linear feet of all framing members, materials like those used on the original construction may be used."

G.
Section R302.17 –Fire Protection for Overhanging Features. Section R302.17 is added to the California Residential Code to read in its entirety:

“R302.17 Fire Protection for Overhanging Features. Bay windows, cantilever projections, and over overhanging features of structures that are 12 inches to 15 feet above grade shall conform to the requirements of Section CWUIC 504.7.1, Underside of projections.”

H.
Section R308.1 –Address Identification. The first sentence of Section R308.1 is amended to read as follows: “Address identification. Buildings and accessory dwelling units must be provided with approved address identification.”

I.
Section R309.1 – Townhouse Automatic Sprinkler Systems. Section R309.1 is amended to add the following to the listed exception: “However, if at any time a building is destroyed to the extent that more than 50% of the physical building requires reconstruction, an automatic fire sprinkler system shall be required. The amount of physical building destruction shall be determined by the Building Official.”

J.
Section R309.2 – One- and Two-Family Dwellings Automatic Sprinkler Systems. Section R309.2 is amended to add the following to the end of exception 1: “However, if at any time a building is destroyed to the extent of more than 50% of the physical building requires reconstruction, an automatic fire sprinkler system shall be required.
The amount of physical building destruction is determined by the Building Official.”

Chapter 8 – Building, Construction, and Fire Prevention K. Section R310.6 Power source. Section R310.6 is amended to replace Exception 5 to read as follows:

“5. Smoke alarms are permitted to be solely battery operated when work is limited to the installation, alteration or repairs of plumbing or mechanical systems or the installation, alteration or repair of electrical systems which do not result in the removal of interior wall or ceiling finishes exposing the structure unless it is a full house re-wire as determined by the building official.”

L.
Section R317.6 – Electric vehicle (EV) charging systems. Section R317.6 is amended to read as follows: “Newly constructed one- and two-family dwellings, town- houses and one- and two-family dwellings with an existing or proposed garage for which a building permit application has been submitted with a project value of $50,000 or greater and that includes an electric service panel upgrade shall comply with EV infrastructure requirements in accordance with the California Green Building Standards Code, Chapter 4, Division 4.1.”

M.
Section R319.7 – Alterations or Repairs of Existing Basements. Section R319.7 is amended to read as follows:

“R319.7 Alterations or Repairs of Existing Basements. An emergency escape and rescue opening in accordance with Section R319.1 is required where existing basements undergo alterations or repairs to create a habitable space. Exception: An operable window complying with Section R319.7.1 shall be acceptable as an emergency escape and rescue opening.”

N. Section R325.1.1 – Natural Light. Section R325.1.2 is amended to delete exception 3, which allows artificial light in lieu of natural light.

O. Section R325.1.2 Natural Ventilation. Section R325.1.2 is amended to delete exceptions 1 and 2, which allow mechanical ventilation in lieu of natural ventilation.

P. Section R330.4 Locations. Section R330.4 ESS installation location #3 is to be amended to read as follows:

“3. Outdoors or on the exterior side of exterior walls located not less than 3 feet (914 mm) from the property line, and any opening into the dwelling, basement or crawlspace including doors, windows and vents, except where smaller separation distances are permitted by the UL 9540 listing, manufacturer’s installation instructions, and as determined by the building official.”

Additionally, section R330.4 is amended to add the following after the last sentence:
“If the ESS is not installed at the main electric panel disconnect, a disconnecting means for the ESS shall be installed near and in line of site of the main electric panel, on the exterior of the building. The disconnect shall be readily accessible and a permanent red label affixed to indicate the ESS disconnect.”

Chapter 8 – Building, Construction, and Fire Prevention

Q.
Section R401.3 – Drainage: Section R401.3 is amended to append the following to the end of the section: "Provisions shall be made for the control and drainage of surface and subsurface water around buildings. Whenever plans for an improvement to real property indicate the possibility of change in either surface or subsurface drainage, or both, the applicant shall submit a plan for drainage control which is in compliance with the current version of the C.3 Stormwater Program as adopted by the Alameda county and provides for no increase or other adverse change in drainage on an adjacent property. Methods determined by the Building Official to be reasonable and appropriate under the circumstances and in compliance with the C.3 Stormwater Program guidelines may be approved. The Building Official will require plans by a registered civil engineer, if necessary, based on the characteristics of the site."

R. Section R401.4.3 – Foundation and Soils Investigations – Where Required.
Section R401.4.3 is added to the 2025 California Residential Code to read in its entirety:

“R401.4.3

Foundation and Soils Investigations – Where Required. A geotechnical evaluation shall be required:
1. "For any building on a site having a slope of 20% or greater, a soils report must be prepared by a geotechnical engineer licensed by the State of California.

At discretion of the Building Official based on the characteristics of the site and the nature of the construction proposed.”

S. Section R403.1.6 - Foundation Anchorage. Section R403.1.6 is amended to delete the last two sentences in the third paragraph and add the following sentence in its place: “All anchor bolts, seismic ties, and other mechanical or structural connectors to be embedded in new concrete must be installed and in place at the time of the foundation form inspection.”

T. Section R404.1.1 – Design Required. Section 404.1.1 is amended to read in entirety as follows:

“R404.1.1 Design Required. Concrete or masonry foundation walls must be designed in accordance with accepted engineering practice if either of the following conditions exists:

The wall is subject to hydrostatic pressure from groundwater.

The wall is supporting more than 30 inches of unbalanced backfill that does not have permanent lateral support at the top or bottom.”

U.
Section R405.1 - Concrete or Masonry Foundations. Section R405.1 is amended to read in entirety as follows:

Chapter 8 – Building, Construction, and Fire Prevention “R405.1 Concrete or Masonry Foundations. Drains shall be provided around all concrete or masonry foundations that retain earth and enclose habitable or usable spaces located below grade. Drainage tiles, gravel or crushed stone drains, perforated pipe or other approved systems or materials shall be installed at or below the top of the footing or below the bottom of the slab and shall discharge by gravity or mechanical means into an approved drainage system. Gravel or crushed stone drains shall extend not less than 1 foot (305 mm) beyond the outside edge of the footing and 6 inches (152 mm) above the top of the footing and be covered with an approved filter membrane material. The top of open joints of drain tiles shall be protected with strips of building paper. Except where otherwise recommended by the drain manufacturer, perforated drains shall be surrounded with an approved filter membrane or the filter membrane shall cover the washed gravel or crushed rock covering the drain. Drainage tiles or perforated pipe shall be placed on not less than of 2 inches of washed gravel or crushed rock not less than one sieve size larger than the tile joint opening or perforation and covered with not less than 6 inches of the same material.

Exception: A drainage system is not required where the foundation is installed on well- drained ground or sand-gravel mixture soils according to the United Soil Classification System, Group I soils, as detailed in Table R401.4.1(2).”

V. Section R408.2 – Openings for under-floor ventilation. Section R408.2 is amended to replace the first sentence as follows: “Ventilation openings through foundation or exterior walls surrounding the under-floor space shall be provided in accordance with this section and shall comply with section 504.10 of the California Wildland-Urban Interface Code.”

W.
Section R507.2 - Materials. Section R507.2 is amended to replace the first sentence as follows: “Materials used for the construction of decks shall comply with this section and Section R302.16.”

X.
Section R703.6 - Wood Shakes and Shingles. Section R703.6 is amended to add the following at the end of the first paragraph of R703.6:

“1. If more than 50% of the wall area of a given face of the building is replaced, all the shingles and shakes on that face shall meet the requirements of Section 504.5.2 Exterior Walls of the California Wildland-Urban Interface Code.

Exterior wall finishes of existing structures where less than 50% of the wall area is being replaced or openings are infilled, but not additions to existing structures, may be replaced to match the existing wall finish. If wood shakes or shingles are installed they shall meet the requirements of Section 504.5.2 Exterior Walls of the California Wildland-Urban Interface Code.

Chapter 8 – Building, Construction, and Fire Prevention 3. Framing to receive wood siding or wood shingles and shakes siding must be covered with tight-fitting minimum 1/2" wood underlayment or 1/2"exterior grade gypsum sheathing."

Y.
Section R905.7 – Wood Shingles. Section R905.7 is amended to read in entirety as follows:

“R905.7 Wood Shingles. The installation of wood shingles is prohibited.

Exception: The installation of wood shingles shall be permitted if necessary for repair or replacement of existing wood shingles on existing dwellings and accessory structures on or eligible for inclusion on the National Register of Historic Places.”

Z.
Section R905.8 – Wood Shakes. Section R905.8 is amended to read as follows:

“R905.8 Wood Shakes. The installation of wood shakes is prohibited.

Exception: The installation of wood shakes shall be permitted if necessary for repair or replacement of existing wood shakes on existing dwellings and accessory structures on or eligible for inclusion on the National Register of Historic Places.”

AA. Section R908.1 General. Section R908.1 is amended to replace the first sentence as follows:
” Materials and methods of application used for recovering or replacing an existing roof covering shall comply with the requirements of this chapter and section 507 of the 2025 California Wildland-Urban Interface Code. Roof ventilation is required to meet Section R806 and vents shall comply with section 504.10 of the 2025 California Wildland-Urban Interface Code.”

BB.
Section R1003.9.2 – Spark Arresters. Section R1003.9.2 is amended to add the following after the first sentence: “This is required when a building permit is issued for an improvement of a value in excess of $1,000.00. The spark arrester must be installed before scheduling of a final inspection."

CC.
Appendix BG. Section BG105 – Mechanically Generated Noise Sources is added to Appendix BG to read as follows:

“Section BG 105 Mechanically Generated Noise Sources. Machines and other devices located on the exterior of structures which generate sounds perceptible outside the perimeters of the lot on which they are located must be installed with sound transmission control measures to adequately minimize or eliminate the transmission of the sound to a level not to exceed 50 decibels, A-weighted, at the nearest property line to the source. This section is directed to and includes, but is not limited to, pool and spa filter systems, air conditioning units, heat pumps, generators, and exterior mounted blowers for exhaust systems. A sound calculation based on the current version of the ANSI/AHRI Standard 275 is required for all proposed equipment. If equipment sound

Chapter 8 – Building, Construction, and Fire Prevention data is not available or a preliminary sound calculation is not feasible, alternate compliance verification may be required such as a report from an acoustic professional that demonstrates compliance as determined by the Building Official.”

8.02.030 2025 California Building Code (Part 2) – Amendments

The following provisions amend the listed sections of the 2025 California Building Code as adopted in Section 8.02.010. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

A.
Section 105.1 – Permits Required. Section 105.1 is amended to add the following provisions at the end of the section: “A building permit is also required for the following:

An on-grade improvement capable of use for parking a vehicle and located in the street yard setback.

On-grade stairs with four or more risers that are part of the primary entrance/exit to and from the structure.

Construction, repair or replacement of a public sidewalk, curb or gutter.

Alterations and property improvements which have received or require design review approval from the City of Piedmont.”

B.
Section 105.2 – Work Exempt from Permits. Section 105.2 is amended as to modify the exceptions in the Building section to read as follows:

“Building: 1. One-story detached accessory structures used as a tool or storage shed, playhouse or similar use, provided the floor area does not exceed 120 square feet.
except as regulated by the California Wildland Urban-Interface Code, Part 7.

A fence 6 feet high or less.

Oil derricks.

Retaining walls which are not over 30 inches in height, measured from the top of the footing to the top of the wall, unless supporting a surcharge or impounding Class I, II or III-A liquids.

A platform, walk or driveway not more than 12 inches above grade and not over any basement or story below and not part of an accessible route.

Chapter 8 – Building, Construction, and Fire Prevention 6. Painting, papering, interior floor covering and similar finish work.

Temporary motion picture, television and theater stage set or scenery.

8. Shade cloth structures constructed for nursery or agricultural purposes, not including service systems.

9. Swings and other playground equipment accessory to detached one- and two- family dwellings.

10. Widow awnings in Group R-3 and U occupancies, supported by an exterior wall and that do not project more than 54 inches from the exterior wall and do not require additional support.

Non-fixed and movable fixtures, cases, racks, counters and partitions not over 5 feet 9 inches in height.”

C. Section 110.1 – Inspections, General: Section 110.1 is amended to add a new paragraph at the end of Section 110.1 to read as follows: "The Building Official may require a survey of the lot to verify that the structure is located in accordance with the approved plans. In the case of a new residence or a detached structure, the Building Official will require a survey by a licensed land surveyor before approving the foundation inspection. The foundation survey must include the related setbacks, the elevation of the existing grades, and the elevations of the foundation. At the completion of the framing and roof sheathing, the survey must include the elevations of all floors and the maximum roof height, to verify that the structure is built according to the approved drawings.”

D. Section 711.4– Protection of Underside of Floors. Section 711.4 is added to the 2022 California Building Code to read in its entirety as follows:

“711.4
Protection of Underside of Floors. The exposed underside of a floor for habitable space, uninhabitable space which supports or is attached to habitable space, or a deck which is located less than 10 feet from a structure regulated by this code, must be protected by the installation of materials approved for one-hour fire-resistant construction on the horizontal exterior side. Gypsum sheathing may be covered by combustible finish materials.

Exceptions:

Where exterior walls enclose the under floor area completely to grade.

Where the underfloor area is equipped with an automatic fire suppression system which conforms with the California Fire Code, as amended under division 8.02 of the Piedmont City Code.

Chapter 8 – Building, Construction, and Fire Prevention

A balcony or deck which is less than one foot above grade.

A balcony or deck which is constructed meeting the following requirements: Horizontal framing members are of size 4 inches x 8 inches (nominal) and larger; Posts are of size 6 inches x 6 inches (nominal) and larger; and Decking conforming to requirements in Section 709A Decking

A deck constructed over permanent noncombustible paving that prevents the growth of plant material and which extends at least 3 feet beyond the edge of the deck.

The alteration or repair of an existing deck or balcony must meet the above requirements, except that if the number of linear feet of horizontal framing members to be repaired and replaced is less than 25% of the total linear feet of all framing members, materials like those used on the original construction may be used."

E. Section 903.2 – Automatic Sprinkler Systems Where required. Section 903.2 is amended to append the following to the section after the first sentence: “Any previously non-conforming structure is reconstructed after more than 50% of the physical building is demolished or destroyed shall be constructed with an automatic sprinkler system as described in Sections 903.2.1 through 903.2.21. The amount of physical building destruction or demolition is determined by the Building Official.”

F. Section 1202.4.1 – Ventilation openings. Section 1202.4.1 is amended to replace the first sentence as follows: “Ventilation openings through foundation or exterior walls surrounding the under-floor space shall be provided in accordance with this section and shall comply with section 504.10 of the California Wildland-Urban Interface Code.”

G. Section 1405.2 – Wood Shingle Siding and Other Wood Siding. Section 1405.2 is added to the 2025 California Building Code to read as follows:

“Section 1405.2 Wood Shingle Siding and Other Wood Siding. Exterior wall coverings constructed of wood shingle siding and other wood siding must comply with the following limitations:

The wood shingle siding and other wood siding must conform to the requirements of Section 504.5 of the California Wildland-Urban Interface Code.

Exterior wall finishes of existing structures where less than 50% of the wall area is being replaced or openings are infilled, but not additions to existing structures, may be replaced to match the existing wall finish. If wood shakes or

Chapter 8 – Building, Construction, and Fire Prevention shingles are installed they must meet the requirements of Section 504.5.2 Exterior Walls of the California Wildland-Urban Interface Code..

Framing to receive wood shingle siding or other wood siding must be covered with tight-fitting minimum 1/2" wood underlayment or 1/2" exterior grade gypsum sheathing.”

H. Section 1507.8 Wood Shingles. Section 1507.8 is amended to read in its entirety as follows:

“1507.8 Wood shingles. The installation of wood shingles is prohibited.

Exception:
The installation of wood shingles shall be permitted if necessary for repair or replacement of existing wood shingles on existing dwellings and accessory structures on or eligible for inclusion on the National Register of Historic Places.”

I. Section 1507.9 – Wood Shakes. Section 1507.9 is amended to read in its entirety as follows:

“1507.9 Wood Shakes. The installation of wood shakes is prohibited.

Exception:
The installation of wood shakes shall be permitted if necessary for repair or replacement of existing wood shakes on existing dwellings and accessory structures on or eligible for inclusion on the National Register of Historic Places.”

J. Section 1512.1 – General. Section 1512.1 is amended to replace the first sentence in its entirety as follows:

“Materials and methods of application used for recovering or replacing an existing roof covering shall comply with the requirements of this chapter and section 507 of the 2025 California Wildland-Urban Interface Code. Roof ventilation is required to meet Section 1202 and vents shall comply with section 504.10 of the 2025 California Wildland-Urban Interface Code.”

K. Section 1803.2 – Investigations Required. Section 1803.2 is amended to add the following after the first sentence: “A geotechnical investigation is required:

For a building on a site having a slope of 20% or greater, or

At discretion of the Building Official based on the characteristics of the site and the nature of the construction proposed.”

L. Section 1805.4.3 – Drainage Discharge. Section 1805.4.3 is amended to read in its entirety as follows:

Chapter 8 – Building, Construction, and Fire Prevention “1805.4.3 Drainage Discharge. Provisions shall be made for the control and drainage of surface and subsurface water around buildings. Whenever plans for an improvement to real property indicate the possibility of change in either surface or subsurface drainage, or both, the applicant shall submit a plan for drainage control which is in compliance with the current version of the C.3 Stormwater Program as adopted by the Alameda County and provides for no increase or other adverse change in drainage on an adjacent property. Methods determined by the Building Official to be reasonable and appropriate under the circumstances and in compliance with the C.3 Stormwater Program guidelines may be approved. The Building Official will require plans by a registered civil engineer, if necessary, based on the characteristics of the site."

M. Section 1807.2 – Retaining Walls. Section 1807.2 is amended to add the following sentence to the end of the first paragraph: “A retaining wall, any portion of which exceeds 30 inches in height measured from the top of the footing to the top of the retaining wall, must be designed by a registered civil or structural engineer or architect.”

N. Section 2113.9.2 – Spark Arrestors. Section 2113.9.2 is amended to add the following after the first sentence: “A spark arrester is required when a building permit is issued for an improvement. The spark arrester must be installed or in good working order before the scheduling of the final inspection.”

O. Section 2308.7.1 – Foundation Plates or Sills. Section 2308.7.1 is amended to add the following sentence at the end of the paragraph: “All anchor bolts, seismic ties, and any other mechanical or structural connectors to be embedded in new concrete must be installed and be in place at the time of the foundation form inspection.”

P. Section 2803 – Mechanically Generated Noise Sources. Section 2803 is added to the 2025 California Building Code to read as follows:

“Section 2803 Mechanically Generated Noise Sources. Machines and other devices located on the exterior of structures which generate sounds perceptible outside the perimeters of the lot on which the machine or other device is located must be installed with such sound transmission control measures to adequately minimize or eliminate the transmission of the sound to a level not to exceed 50 decibels, A-weighted, beyond property perimeters. This section is directed to and includes, but is not limited to, pool and spa filter systems, air conditioning units, generators, and exterior mounted blowers for exhaust systems.” (Ord. 767 N.S., 01/2023)

8.02.040 2025 California Mechanical Code (Part 4) - Amendments

This section amends the 2025 California Mechanical Code as adopted in Section 8.02.010, as set forth below. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

Chapter 8 – Building, Construction, and Fire Prevention

A. Section 104.3.2 – Plan Review Fees. Section 104.3.2 is amended to delete the fourth paragraph in its entirety and to replace the third paragraph with the following: “The plan review fees specified in this subsection are included in the permit fees specified in section 104.5.”

B. Section 104.5 – Permit Fees. Section 104.5 is amended to replace “in the fee schedule, Table 104.5” in the first section with the following: “by the Fee Schedule set by City Council resolution” and the following sentence to the end of the paragraph: “The determination of value or valuation under this Code is made by the Building Official, and the value to be used in computing the mechanical permit and mechanical plan review fees is the total value of all construction for which the permit is issued.”

C. Section 105.2.6 Reinspections. Section 105.2.6 is amended to delete the fourth paragraph.

D. Section 107.1 General. Section 107.1 is amended append the following: “In accordance with the Health and Safety Code sections 17920.5 and 17920.6, the Board of Appeals shall be the City of Piedmont Planning Commission.”

8.02.050 2025 California Plumbing Code (Part 5) - Amendments

This section amends the 2025 California Plumbing Code as adopted in Section 8.01.010, as set forth below. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

A. Section 104.3.2 – Plan Review Fees. Section 104.3.2 is amended to delete the fourth paragraph in its entirety and to replace the third paragraph to read: “The plan review fees specified in this subsection are included in the permit fees specified in Section 104.5.”

B. Section 104.5 – Fees. Section 104.5 is amended to replace “in the fee schedule, Table 104.5” in the first section with the following: “by the Fee Schedule set by City Council resolution” and the following sentence to the end of the paragraph: “The determination of value or valuation under this Code shall be made by the Building Official, and the value to be used in computing the plumbing permit and the plumbing plan review fees are the total value of construction work for which the permit is issued.”

C. Section 107.1 – General. Section 107.1 is amended append the following: “In accordance with the Health and Safety Code sections 17920.5 and 17920.6, the Board of Appeals shall be the City of Piedmont Planning Commission.”

Chapter 8 – Building, Construction, and Fire Prevention

D. Section 601.9 – Ground Driven Electrode Required. Section 601.9 is added to the 2022 California Plumbing Code to read as follows:

“601.9 Ground Driven Electrode Required. When new water service piping is installed, and a ground driven electrode is nonexistent, one must be driven and the proper electrical connections made as described in the current electrical code.”

E. Section 1101.2 – Where Required. Section 1101.2 is amended to read in its entirety as follows: “Roofs, paved areas, yards, courts, courtyards, vent shafts, light wells, or similar areas having rain water must be drained into a separate storm sewer system or to some other place of disposal satisfactory to the Authority Having Jurisdiction.”

F. Section 1101.6.1 – Discharge. Section 1101.6.1 is amended to read in its entirety as follows:

“1101.6.1 Discharge. Provisions shall be made for the control and drainage of surface and subsurface water around buildings. Whenever plans for an improvement to real property indicate the possibility of change in either surface or subsurface drainage, or both, the applicant shall submit a plan for drainage control which is in compliance with the current version of the C.3 Stormwater Program as adopted by the Alameda County and provides for no increase or other adverse change in drainage on an adjacent property. Methods determined by the Building Official to be reasonable and appropriate under the circumstances and in compliance with the C.3 Stormwater Program guidelines may be approved. The Building Official will require plans by a registered civil engineer, if necessary, based on the characteristics of the site."

G. Section 1101.6.3 — Splash Blocks. Section 1101.6.3 is deleted.

H. Section 1101.6.5 — Open Area. Section 1101.6.5 is deleted.

I. Section 1501.3 – Permit. Section 1501.3 is amended to delete the listed exception.

J. Section 1503.1.1 – Clothes Washer System. Section 1503.1.1 is amended to revise the first paragraph to read: “A clothes washer system must comply with the following:” (Ord. 767 N.S., 01/2023)

8.02.060 2025 California Electrical Code (Part 3) - Amendments

This section amends the 2025 California Electrical Code as adopted in Section 8.02.010, as set forth below. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions

Chapter 8 – Building, Construction, and Fire Prevention specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

A. Section 89.108.4.2 – Fees. Section 89.108.4.2 is amended to add the following new paragraph: “A fee for each electrical permit must be paid to the city in accordance with the Fee Schedule set by City Council resolution. The determination of value or valuation under any of this code shall be made by the Building Official. The value used in computing the electrical permit and electrical plan review fee is the total value of all construction work for which the permit is issued.”

B. Subsection 210.52(F) Laundry Areas. Section 210.52(F) is replaced in its entirety as follows:

“(F) Laundry Areas. In dwelling units, at least one receptacle outlet shall be installed in areas designated for the installation of laundry equipment. In addition, at least one 120/240v, 30 ampere circuit shall be installed within 6 feet of appliance location in accordance with Section 210.50(C).

Exception No. 1: A receptacle for laundry equipment shall not be required in a dwelling unit of a multifamily building where laundry facilities are provided on the premises for use by all building occupants.

Exception No. 2: A receptacle for laundry equipment shall not be required in other than one-family dwellings where laundry facilities are not to be installed or permitted.”

C. Section 210.52 Dwelling Unit Receptacle Outlets. Section 210.52 is amended to add the following subsections:

“(J) Kitchen Cooking Appliances. At least one 240v 50 ampere circuit shall be installed within 6 ft. of the appliance location, in accordance with Section 210.50(C).

K) Application of Requirements. The application of the requirements of Sections 210.52(F) and(J) shall extend to any addition or modifications to circuits in a laundry area, within six (6) feet of an existing or proposed kitchen range or oven, as applicable, or where more than 50% of the 120/240 volt wiring in a dwelling unit is replaced.”

D. Section 220.83 Existing Dwelling Unit. Section 220.83 is replaced in its entirety as follows:

“220.83 Existing Dwelling Unit. This section shall be permitted to be used to determine if the existing service or feeder is of sufficient capacity to serve additional loads. Where the dwelling unit is served by a 120/240-volt or

Chapter 8 – Building, Construction, and Fire Prevention 208Y/120-volt, 3-wire service, calculate the total load in accordance with Section 220.83(B).

(A) Where Additional Air Conditioning Equipment or Electric Space- Heating Equipment Is Not to Be Installed. This section is deleted in its entirety.

(B) Where Additional Air Conditioning Equipment or Electric Space Heating Equipment Is to Be Installed. The following percentages shall be used for existing and additional new loads. The larger connected load of air- conditioning or space-heating, but not both, shall be used.

Load

Percent of Load Air-conditioning equipment

100
Central electric space heating

100
Less than four separately controlled space-heating units

100
First 8 kVA of all other loads

100
Remainder of all other loads

40

Other loads shall include the following:
(1)
General lighting and general-use receptacles at 33 volt-amperes/m² or 3 volt-amperes/ft² as determined by 220.12
(2)
1500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2)
(3)
The nameplate rating of the following:
a.
All appliances that are fastened in place, permanently connected, or located to be on a specific circuit
b.
Wall-mounted ovens, counter-mounted cooking units
c.
Water heaters
(4)
One 30 ampere circuit for clothes dryers per Section 210.52(F) (5) One 50 ampere circuit for induction range per Section 210.52 (J) (6) One 40 ampere circuit for electric vehicle charging station per Section 4.106.4.1 of the 2025 California Green Building Standards Code, Title 24, Part 11”

8.02.070 2025 California Energy Code (Part 6) – Amendments

This section amends the 2025 California Energy Code as adopted in Section 8.02.010, as set forth below. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

A. Section 100.0 – Scope. Section 100.0 Scope, is modified to add a new section (i) as follows:

Chapter 8 – Building, Construction, and Fire Prevention “(i) Single Family Building Remodel Energy Reach Code - Purpose and Intent.
In addition to all requirements of the California Energy Code applicable to Single Family building additions and alterations, the energy efficiency, renewable energy, and electric readiness measures specified in Section 150.2(b) shall be required for certain single family additions and alterations. “ B. Section 100.1(b) Definitions. Section 100.1(b) Definitions, is modified by adding the following definitions:

“HOME ENERGY SCORE. Home Energy Score means the score provided by a Home Energy Score Certified Assessor following an assessment of a property, using the Home Energy Score Scoring Methodology developed by the U.S. Department of Energy.”

C.
Section 150.2 (a) Additions. Section 150.2(a) is amended to replace the first paragraph of to read:

“(a) Additions. Additions to existing single-family residential buildings shall meet the requirements of Sections 110.0 through 110.9, Sections 150.0(a) through (n), (p), (q), Section 150.2(d), and either Section 150.2(a)1 or 2.”

D. Section 150.2 (b) Alternations. Section 150.2(b) is amended to replace the first paragraph of to read:

“(b) Alterations. Alterations to existing single-family residential buildings or alterations in conjunction with a change in building occupancy to a single-family residential occupancy shall meet the requirements of Section 150.2(d) and either Item 1 or 2 below.”

E.

Section 150.2 is amended to add the following subsection 150.2 (d):

“(d) Single Family Additions or Alterations. The following requirements shall apply to the entire dwelling unit, not just the addition or altered portion.

An alteration of or addition to a single family building, with a stated project value of $351 or more, is required to submit documentation that one item from the following list of Energy Efficiency and Electrification measures is included in the scope of work, in addition to any requirements imposed under California Energy Code section 150.2.

1 The amount of $35,000 shall be automatically adjusted for inflation annually on January 1 of each year beginning in 2028 based upon the California Construction Cost Index published by the California Department of General Services from data produced by the Engineering News Record.

Chapter 8 – Building, Construction, and Fire Prevention An alteration of or addition to a single family building with a stated project value of $135,0002 or more shall require the inclusion of one item marked as *high energy impact or any two items from the measures below in the scope of work.

Note: To the extent the provisions of Section 150.2(d) conflict with other provisions of the California Energy Code, then the most energy conserving provisions shall supersede and control.

Energy Efficiency and Electrification Measures: A. Install R-49 attic insulation, and apply air sealing practices in all accessible areas of the building.
B. Air seal all space conditioning ductwork to meet the requirements of Section 150.2(b)1.E of the 2025 California Energy Code.
C. New Ducts, R-6 insulation + Duct Sealing: Replace existing space conditioning ductwork with new R-6 ducts that meet the requirements of 2025 California Energy Code Section 150.0(m)11. D. Install R-15 wall insulation on exterior walls to meet the requirements of Section 150.0(c) of the 2025 California Energy Code.
E. Install R-19 insulation at raised floor assemblies meeting standards of 2025 California Energy Code Section 150.0(d). F. Install R-3 insulation on all accessible hot water piping. Install R-6 insulation to the exterior of existing residential tank storage water heaters.
G. *Replace fuel gas furnace with an electric heat pump system meeting the Requirements of the 2025 California Energy Code Section 150.2(b)C or with another high efficiency electric space heating system if approved by the Building Official. * high energy impact H. *Replace fuel gas water heater with a heat pump water heater meeting the requirements of 2025 California Energy Code Section 150.2(b)H.iii.(b) or 150.2(b)H.iii.(c), or with other high efficiency electric water heating system per approval of the Building Official. * high energy impact I. Replace existing electric resistance or gas clothes dryer with heat pump dryer with no resistance element and cap gas line. J. Replace all existing gas and electric resistance stove tops with induction stove top and cap the gas line. K. *Install a solar photovoltaic system that meets the requirements of 2025 California Energy Code Section 150.1(c)14. * high energy impact L. Implement one or more recommendations specified in a Home Energy Score or Home Energy Audit report that has been completed within five years and that is submitted with the application for a building permit, with the approval of such recommendation by the Building Official.

Exceptions:

2 The amount of $135,000 shall be automatically adjusted for inflation annually on January 1 of each year beginning in 2028 based upon the California Construction Cost Index published by the California Department of General Services from data produced by the Engineering News Record.

Chapter 8 – Building, Construction, and Fire Prevention

1. A Home Energy Score Report for the single family building, completed within 5 years, demonstrating that the building already has a minimum Home Energy Score of 7, is submitted to the Building Official.

2. The Building Official shall not require the installation of Energy Efficiency and Electrification Measures if one or more of the following conditions apply:

a. The unique features of the construction of the single family building structure, including, but not limited to existing heating and/or cooling system(s) that are not configured for conversion to forced air systems preclude installation of those measures. b. The installation of the measures is not commensurate with the project’s scope and budget, as determined by the Building Official, because the cost of those measures would exceed 20% of the total project cost or require substantial construction in areas of the residential structure that would otherwise not be part of the project. c. Requiring the installation of measures is otherwise prohibited by other applicable law.”

8.02.080 2025 California Green Building Standards Code (Part 11) - Amendments

This section amends the 2025 California Green Building Standards Code as adopted in Section 8.02.010, as set forth below. Unless otherwise expressly stated, when a section or subsection of the California Building Standards Code is amended by this ordinance, only the portions specifically set forth are amended, and all other portions, subsections, and provisions of that section not expressly modified shall remain in full force and effect.

A. Section 301.1.1 – Additions and Alterations: Section 301.1.1 is amended to add the following after the first sentence:

“The mandatory provisions of Section 4.408 shall apply to a project with a building permit valuation of $50,000 or more. The valuation shall be determined by the Building Official.”

8.02.090 2025 California Fire Code (Part 9) – Amendments

This section amends the 2025 California Fire Code as adopted in Section 8.02.010, as set forth below.

A. Section 5601.1.3 – Fireworks. Section 5601.1.3 is amended to read in its entirety:

“5601.1.3 Fireworks. The possession, manufacture, storage, sale, handling and use of fireworks or pyrotechnic materials is prohibited within the City of Piedmont.

Chapter 8 – Building, Construction, and Fire Prevention Exception: This prohibition shall not apply to Snap Caps and Party Poppers classified by the State Fire Marshal as pyrotechnic devices.”

B. Section 5608.1– General. Section 5608.1 is amended to read in its entirety:

“5608.1 General. Outdoor fireworks displays and use of pyrotechnics is prohibited within the City of Piedmont.

Exception: This prohibition shall not apply to Snap Caps and Party Poppers classified by the State Fire Marshal as pyrotechnic devices.” (Ord. 767 N.S., 01/2023)

8.02.100 2025 California Wildland-Urban Interface Code (Part 7) – Amendments

This section amends the California Wildland-Urban Interface Code as adopted in Section 8.02.010, as set forth below.

“A. Section 101.3.1 - Application. Section 101.3.1 exception 5 is deleted in its entirety which exempts additions to and remodels of buildings originally built before 2008 to comply with Part 7. “

A. In addition to any other penalties that may be provided at law, any person, firm, corporation, or other entity violating any of the provisions of this division is guilty of a misdemeanor and shall be punished by subject to a fine not to exceed one thousand dollars or by imprisonment not to exceed six months, or both, unless deemed an infraction by the citing officer or prosecuting authority in the exercise of enforcement discretion. Penalties for offenses deemed an infraction may be established by resolution of the City Council, and if not established by resolution, shall be the maximum amounts authorized under Government Code section 36900 subdivision (c). In the discretion of the citing officer or prosecuting authority, a penalty other than as set forth above may be apply applied to an offender for where a more specific penalty provision authorizes the imposition of such other penalty.

B. Violations of this division shall also be subject to administrative fine and enforcement by administrative citation in accordance with Chapter 1, Article II of this Code.

C. Every such violation shall be deemed a separate offense for each day or portion thereof during which such violation continues. (Ord. 786 N.S., 12/2025)

Chapter 8 – Building, Construction, and Fire Prevention