Arcadia Municipal Code Part 3 Additions, Deletes and Amendments

Footnotes:

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Editor's note— Ord. No. 2366, § 9, adopted 12-17-19, amended Part 3 in its entirety to read as herein set out. Former Part 3, §§ 8950—8950.10, pertained to similar subject matter and derived from Ord. No. 2342, adopted 12-6-16.

The 2025 California Residential Code is amended to read as follows:

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R309.1 of the 2025 California Residential Code is amended to read as follows due to local climatic, geographical, and topographical conditions:

R309.1 Where required. Approved automatic extinguishing systems shall be installed:

1. In all new R-2 occupancies.

EXCEPTIONS:

A) Detached Group U occupancies, providing the floor area does not exceed 1000 square feet.

B) Pool houses, recreation rooms and similar accessory occupancies providing no portion of the exterior wall of the building is more than 150 feet from a public street.

C) Other minor buildings and/or occupancies as approved by the Fire Chief.

2. In all existing Group R-2 Occupancies greater than 2500 square feet in living area when enlarged by an addition to the living area of the existing structure.

EXCEPTIONS:

A) Additions of areas that would not require sprinklers such as closets or bathrooms.

3. In all existing Group R-2 Occupancies equal to or less than 2500 square feet in living area, when enlarged by an addition to the living area of the existing structure, exceeds 2500 square feet in residential area.

EXCEPTIONS:

A) Additions of areas that would not require sprinklers such as closets or bathrooms.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R309.1.1 of the 2025 California Residential Code is amended to read as follows due to local climatic, geographical, and topographical conditions:

R309.1.1 Automatic residential sprinkler systems for R-2 occupancies shall be designed and installed in accordance with NFPA 13D or NFPA 13R as amended by the Arcadia Municipal Code.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R309.2 of the 2025 California Residential Code is amended to read as follows due to local climatic, geographical, and topographical conditions:

R309.2. One- and two-family dwellings automatic fire systems.

1. In all new R-3 occupancies.

EXCEPTIONS:

A) Detached private garages, providing the floor area does not exceed 1000 square feet.

B) Pool houses, recreation rooms, workshops, and similar accessory R-3 occupancies providing no portion of the exterior wall of the building is more than 150 feet from a public street.

C) Other minor buildings and/or occupancies as approved by the Fire Chief.

2. In all existing Group R-3 Occupancies greater than 2500 square feet in living area when enlarged by an addition to the living area of the existing structure.

EXCEPTIONS:

A) Additions of areas that would not require sprinklers such as closets or bathrooms.

B) Additions that occur without increasing the number of stories or increasing the horizontal projection of the first story roof.

3. In all existing Group R-3 Occupancies equal to or less than 2500 square feet in living area, when enlarged by an addition to the living area of the existing structure, exceeds 2500 square feet in residential area.

EXCEPTIONS:

A) Additions of areas that would not require sprinklers such as closets or bathrooms.

B) Additions that occur without increasing the number of stories or increasing the horizontal projection of the first story roof.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R309.2.1 of the 2025 California Residential Code is amended to read as follows due to local climatic, geographical, and topographical conditions:

R309.2.1 DESIGN AND INSTALLATION. Automatic residential fire sprinkler systems shall be designed and installed in accordance with NFPA 13D as amended by the Arcadia Municipal Code.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R309.3 of the 2025 California Residential Code is deleted in its entirety and amended to read as follows due to local climatic, geographical, and topographical conditions:

R309.3. DWELLING UNIT FIRE SPRINKLER SYSTEMS. Dwelling unit fire sprinkler systems shall be designed and installed in accordance with NFPA 13D or NFPA 13R as amended by this section.

R309.3.1 NFPA 13R SPRINKLER SYSTEMS. Where allowed in buildings of Group R, up to and including buildings four stories in height, automatic sprinkler systems shall be installed throughout in accordance with NFPA 13R with the following additions:

A) Attics shall be fully sprinklered with quick-response intermediate temperature heads.

B) Private garages shall be sprinklered and shall have a design density of an Ordinary Hazard Group 1 occupancy with a design area of two (2) heads. Quick-response intermediate temperature commercial type heads shall be used for the garage area.

R309.3.2 NFPA 13D SPRINKLER SYSTEMS. Where allowed, automatic sprinkler systems installed in one-and two-family dwellings shall be installed throughout in accordance with NFPA 13D with the following additions:

A) Attics containing forced air units shall have one or more quick-response intermediate temperature sprinkler heads adjacent to each unit.

B) Attached private garages shall be sprinklered and shall have a design density of an Ordinary Hazard Group 1 occupancy with a design area of two (2) heads. Quick-response intermediate temperature commercial type heads shall be used for the garage area.

C) Detached private garages over 1000 square feet in total area shall be sprinklered and shall have a design density of an Ordinary Hazard Group 1 occupancy with a design area of 2 heads. Quick-response intermediate temperature commercial type heads shall be used for the garage area.

D) Residential structures under 5000 square feet in total area shall be designed for two (2) heads flowing in the residential area. Residential structures over 5000 square feet in total area shall be designed for four (4) heads flowing in the residential area.

E) Attics and basements used for storage purposes shall be fully sprinklered with residential type heads.

F) A single exterior bell activated by the waterflow switch shall be provided at an approved location.

G) A representative sample of spare heads shall be provided at an approved location.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Editor's note— Ord. No. 2408, § 9, adopted November 18, 2025, repealed § 8950.5.1 which pertained to an amendment to the California Residential Code and derived from Ord. No. 2366, adopted December 17, 2019; and Ord. No. 2394, adopted November 15, 2022.

Editor's note— Ord. No. 2408, § 9, adopted November 18, 2025, repealed § 8950.5.2 which pertained to an amendment to the California Residential Code and derived from Ord. No. 2366, adopted December 17, 2019; and Ord. No. 2394, adopted November 15, 2022.

Editor's note— Ord. No. 2408, § 9, adopted November 18, 2025, repealed § 8950.5.3 which pertained to an addition to the California Residential Code and derived from Ord. No. 2366, adopted December 17, 2019; and Ord. No. 2394, adopted November 15, 2022.

Section R902.1 of the 2025 California Residential Code is amended as follows due to local climatic, geographical, and topographical conditions:

R902.1. ROOFING COVERING MATERIALS.

Roof decks shall be covered with materials as set forth in Section R904 or with roof coverings as set forth in Section R905. A minimum Class A or B roofing shall be installed in areas designated by this section or where the edge of the roof deck is less than 3 feet from a lot line. Where class A or B roof assemblies are required, they shall be tested in accordance with ASTM E108 or UL 790. Where required, the roof assembly shall be listed and identified as to class by an approved testing agency.

EXCEPTIONS:

1. Class A roof assemblies include those with coverings of brick, masonry and exposed concrete roof deck.

2. Class A roof assemblies also include ferrous or copper shingles or sheets, metal sheets and shingles, clay or concrete roof tile, or slate installed on noncombustible roof decks or ferrous, copper or metal sheets installed without a roof deck on noncombustible framing.

3. Class A roof assemblies include minimum 16 ounces per square foot copper sheets installed over combustible roof decks.

4. Class A roof assemblies include slate installed over underlayment over ASTM D226, Type II underlayment over combustible decks.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R902.1.2 of the 2025 California Residential Code is amended to read as follows due to local climatic, geographical, and topographical conditions:

R902.1.2. ROOF COVERINGS WITHIN ALL OTHER AREAS.

The entire roof covering of every existing structure where more than fifty (50%) percent of the total roof area is replaced within any one-year period, the entire roof covering of every new structure, and any covering applied in the alteration, repair or replacement of the roof of every existing structure, shall be a fire-retardant roof covering that is at least Class B.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)

Section R902.2 of Section R902 of the 2025 California Residential Code is amended to read as follows due to local climatic, geographical, and topographical conditions:

R902.2. FIRE-RETARDANT-TREATED SHINGLES AND SHAKES.

Fire-retardant-treated wood shakes and shingles are wood shakes and shingles complying with UBC Standard 15-3 or 15-4 which are impregnated by the full-cell vacuum-pressure process with fire-retardant chemicals, and which have been qualified by UBC Standard 15-2 or ASTM E108 or UL 790 for use on Class A or B roofs.

(Ord. No. 2366, § 9, 12-17-19; Ord. No. 2394, § 9, 11-15-22; Ord. No. 2408, § 9, 11-18-25)