Wildland‑Urban Interface Area Requirements (access, water, premises identification, key boxes)

Grounded in the retrieved California Wildland-Urban Interface Code — click a citation to read the verbatim passage:

• CWUIC § 4-1 High relevance — show source text

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  4 WILDLAND-URBAN INTERFACE AREA REQUIREMENTS

  User notes:

  About this chapter: Chapter 4 provides requirements that apply to all occupancies in the wildland-urban interface and pertain to all of the following:

  1. Fire service access to the property that is to be protected, including fire apparatus access roads and off-road driveways.

  2. Premises identification.

  3. Key boxes to provide ready access to properties secured by gated roadways or other impediments to rapid fire service access.

  4. Fire protection water supplies, including adequate water sources, pumper apparatus drafting sites, fire hydrant systems and system reliability.

  5. Fire department access to equipment such as fire suppression equipment and fire hydrants.

  SECTION 401—GENERAL

  401.1 Scope. Wildland-urban interface areas shall be provided with emergency vehicle access and water supply in accordance with this chapter.

  401.2 Objective. The objective of this chapter is to establish the minimum requirements for emergency vehicle access and water supply for buildings and structures located in the wildland-urban interface areas.

  401.3 General safety precautions. General safety precautions shall be in accordance with this chapter. See also Appendix A.

  SECTION 402—APPLICABILITY

  402.1 Subdivisions. Subdivisions shall comply with Sections 402.1.1 and 402.1.2.

  402.1.1 Access. New subdivisions, as determined by this jurisdiction, shall be provided with fire apparatus access roads in accordance with the California Fire Code; the California Code of Regulations, Title 14, Division 1.5, Chapter 7, Subchapter 2, Article 2; and access requirements in accordance with Section 403.

  402.1.2 Water supply. New subdivisions as determined by this jurisdiction shall be provided with water supply in accordance with Section 507 of the California Fire Code; California Code of Regulations, Title 14, Division 1.5, Chapter 7, Subchapter 2, Article 4; and Section 404.

  402.1.2.1 Parcel map approval. Water supply requirements shall apply in the tentative and parcel map process when new parcels are approved by the local jurisdiction.

  402.2 Individual structures. Individual structures shall comply with Sections 402.2.1 and 402.2.2.

  402.2.1 Access. Individual structures hereafter constructed or relocated into or within wildland-urban interface areas shall be provided with fire apparatus access in accordance with the California Fire Code; the California Code of Regulations, Title 14, Division 1.5, Chapter 7, Subchapter 2, Subsection 1273; and Section 403 .

  402.2.2 Water supply. Individual structures hereafter constructed or relocated into or within wildland-urban interface areas shall be provided with a conforming water supply in accordance with the California Code of Regulations, Title 14, Division 1.5, Chapter 7, Subchapter 2, Article 4; California Fire Code Section 507; and Section 404.

• CWUIC § 1-2 High relevance — show source text

  CHAPTER TOPICS	Col2
  CHAPTER	SUBJECT
  1-2	Administration and Definitions
  3-4	Wildland-Urban Interface Area Designation and Requirements
  5	Building Construction Regulations
  6	Fire Protection Requirements
  7	Referenced Standards
  Appendices A-I	Adoptable and Informational Appendices

  Chapter 1 Scope and Administration.

  Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

  Chapter 2 Definitions.

  Chapter 2 is the repository of the definitions of terms used in the body of the code. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

  Chapter 3 Wildland-Urban Interface Areas.

  Chapter 3 provides for the fundamental aspect of applying the code—the legal declaration and establishment of wildland-urban interface areas within the adopting jurisdiction, mapping of the area, periodic review and updates.

  Chapter 4 Wildland-Urban Interface Area Requirements.

  The requirements of Chapter 4 apply to all occupancies in the wildland-urban interface and pertain to all of the following:

  1. Fire service access to the property that is to be protected, including fire apparatus access roads and off-road driveways.

  2. Premises identification.

  3. Key boxes to provide ready access to properties secured by gated roadways or other impediments to rapid fire service access.

  4. Fire protection water supplies, including adequate water sources, pumper apparatus drafting sites, fire hydrant systems and system reliability.

  5. Fire department access to equipment such as fire suppression equipment and fire hydrants.

  Chapter 5 Special Building Construction Regulations.

  The regulations in Chapter 5 establish minimum standards for the location, design and construction of buildings and structures based on construction within a Fire Hazard Severity Zone or a Wildland-Urban Interface (WUI) Area.

  The construction provisions of Chapter 5 are intended to supplement the requirements of the California Building Code and Califor- nia Residential Code and address mitigation of the unique hazards posed to buildings by wildfire and to reduce the hazards of building fires spreading to wildland fuels. This is accomplished by requiring ignition-resistant construction materials.

  Chapter 6 Fire Protection Requirements.

  Chapter 6 contains additional requirements for development and construction in Local Responsibility Areas (LRA) designated as Very High Fire Hazard Severity Zones and areas designated by the State Fire Marshal as State Responsibility Areas (SRA). While many of these provisions are found in Title 14 and Title 19 of the California Code of Regulations, they are replicated here for the code user. The local jurisdiction has the authority to apply the same regulations to LRA when the regulations are adopted by local ordinance.

  The requirements in this chapter reference the process for adoption of Very High Fire Hazard Severity Zones in the LRA; criteria for evaluating existing subdivisions that are at significant fire risk and are without an adequate secondary egress; and criteria for fire safety provisions required in the Safety Element of a city or county General Plan.

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• CWUIC § 402.1.1 High relevance — show source text

  
  Title 19, Division 1]|||||||||||||||||||||||| |Chapter / Section|||||||||||||||||||||||| |402|||†||||||||||||||||||||| |402.1.1|||X||||||||||||||||||||| |402.1.2|||X||||||||||||||||||||| |402.1.2.1|||X||||||||||||||||||||| |402.2.1|||X||||||||||||||||||||| |402.2.2|||X||||||||||||||||||||| |402.3|||X||||||||||||||||||||| |404.1|||X||||||||||||||||||||| |404.2|||X||||||||||||||||||||| |404.4|||X||||||||||||||||||||| |404.5|||X||||||||||||||||||||| |404.6_Reserved_|||X||||||||||||||||||||| |404.7|||X||||||||||||||||||||| |404.8|||X|||||||||||||||||||||

  • The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Wildland-Urban Interface Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

  The California Code of Regulations (CCR), Title 14, Division 1.5 provisions that are found in the California Wildland-Urban Interface Code are not listed in the Matrix Adoption Tables as they are not within the State Fire Marshal’s authority to adopt. These provisions are a reprint from the current CCR, Title 14, Division 1.5 text for the code user’s convenience only and are identified in the body of the code by square brackets containing references to applicable Title 14 sections.

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  4 WILDLAND-URBAN INTERFACE AREA REQUIREMENTS

  User notes:

  About this chapter: Chapter 4 provides requirements that apply to all occupancies in the wildland-urban interface and pertain to all of the following:

  1. Fire service access to the property that is to be protected, including fire apparatus access roads and off-road driveways.

  2. Premises identification.

  3. Key boxes to provide ready access to properties secured by gated roadways or other impediments to rapid fire service access.

  4. Fire protection water supplies, including adequate water sources, pumper apparatus drafting sites, fire hydrant systems and system reliability.

  5. Fire department access to equipment such as fire suppression equipment and fire hydrants.

  SECTION 401—GENERAL

  401.1 Scope. Wildland-urban interface areas shall be provided with emergency vehicle access and water supply in accordance with this chapter.

  401.2 Objective. The objective of this chapter is to establish the minimum requirements for emergency vehicle access and water supply for buildings and structures located in the wildland-urban interface areas.

• CWUIC § 1274.02 High relevance — show source text

  [CCR, Title 14 §1274.02]

  403.2.4 Addresses for Buildings. (a) All Buildings shall be issued an address by the Local Jurisdiction which conforms to that jurisdiction's overall address system. Utility and miscellaneous Group U Buildings are not required to have a separate address; however, each Residential Unit within a Building shall be separately identified. (b) The size of letters, numbers and symbols for addresses shall conform to the standards in the California Fire Code, California Code of Regulations Title 24, Part 9. (c) Addresses for residential Buildings shall be reflectorized.

  [CCR, Title 14 §1274.03]

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  WILDLAND-URBAN INTERFACE AREA REQUIREMENTS

  403.2.5 Address installation, location and visibility. (a) All buildings shall have a permanently posted address which shall be plainly legible and visible from the Road fronting the property. (b) Where access is by means of a private Road and the address identification cannot be viewed from the public way, an unob- structed sign or other means shall be used so that the address is visible from the public way. (c) Address signs along one-way Roads shall be visible from both directions. (d) Where multiple addresses are required at a single driveway, they shall be mounted on a single sign or post. (e) Where a Road provides access solely to a single commercial or industrial business, the address sign shall be placed at the near- est Road intersection providing access to that site, or otherwise posted to provide for unobstructed visibility from that intersection.

  (f) In all cases, the address shall be posted at the beginning of construction and shall be maintained thereafter.

  [CCR, Title 14 §1274.04]

  SECTION 404—WATER SUPPLY

  404.1 General. An approved water source shall have an adequate water supply for the use of the fire protection service to protect buildings and structures from exterior fire sources or to suppress structure fires within the wildland-urban interface area of the jurisdiction in accordance with this section.

  404.2 Required water supply. An approved water supply capable of supplying the required fire flow for structural fire protection and wildland fire exposure shall be provided to the premises on which facilities, buildings or portions of buildings are hereafter constructed or moved into or within the jurisdiction in accordance with Section 507 of the California Fire Code.

  404.3 Draft sites. Approved draft sites shall be provided at natural water sources intended for use as fire protection for compliance with this code. The design, construction, location, access and access maintenance of draft sites shall be approved by the code official.

  404.3.1 Access. The draft site shall have emergency vehicle access from an access road in accordance with Section 403.

  404.3.2 Pumper access points. The pumper access point shall be either an emergency vehicle access area alongside a conforming access road or an approved driveway not longer than 150 feet (45 720 mm). Pumper access points and access driveways shall be designed and constructed in accordance with all codes and ordinances enforced by this jurisdiction. Pumper access points shall not require the pumper apparatus to obstruct a road or driveway.

• CWUIC § 404.5 High relevance — show source text

  404.5 Adequate water supply. Fire-flow requirements shall be determined in accordance with Appendix B or BB of the California Fire Code, as applicable.

  404.6 Reserved.

  404.7 Obstructions. Access to water sources required by this code shall be unobstructed at all times. The fire department shall not be deterred or hindered from gaining immediate access to water source equipment, fire protection equipment or hydrants.

  404.8 Identification. Water sources, draft sites, hydrants and fire protection equipment and hydrants shall be clearly identified in a manner approved by the code official to identify location and to prevent obstruction by parking and other obstructions. Each fire hydrant and access to a water supply shall be identified in accordance with one of the following: 1. Where located along a driveway, a reflectorized blue marker with a minimum dimension of 3 inches (73 mm) shall be located on the driveway address sign and mounted on a fire-retardant post. 2. Where located along an access road: 2.2. A reflectorized blue marker with a minimum dimension of 3 inches (73 mm) shall be mounted on a fire-retardant post. The signpost shall be within 3 feet (914 mm) of said fire hydrant with the sign not less than 3 feet (914 mm) nor greater than 5 feet (1524 mm) above ground, in a horizontal position and visible from the driveway. 2.3. As specified in the State Fire Marshal’s Guidelines for Fire Hydrant Markings Along State Highways and Freeways, May 1988.

  404.9 Testing and maintenance. Water sources, draft sites, hydrants and other fire protection equipment required by this code shall be subject to periodic tests as required by the code official. Such equipment installed under the provisions of this code shall be maintained in an operative condition at all times and shall be repaired or replaced where defective. Additions, repairs, alterations and servicing of such fire protection equipment and resources shall be in accordance with approved standards.

  404.10 Reliability. Water supply reliability shall comply with Sections 404.10.1 through 404.10.3.

  404.10.1 Objective. The objective of this section is to increase the reliability of water supplies by reducing the exposure of vegetative fuels to electrically powered systems.

  404.10.2 Clearance of fuel. Defensible space shall be provided around water tank structures, water supply pumps and pump houses in accordance with Section 603.

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  WILDLAND-URBAN INTERFACE AREA REQUIREMENTS

  404.10.3 Standby power. Standby power shall be provided to pumps, controllers and related electrical equipment so that stationary water supply facilities within the wildland-urban interface area that are dependent on electrical power can provide the required water supply. The standby power system shall be in accordance with Section 2702 of the California Building Code and Section 1203 of the California Fire Code . The standby power source shall be capable of providing power for not less than 2 hours.

• CWUIC § 1-2 High relevance — show source text

  Population growth and the expanding urban development into traditionally nonurban areas have increasingly brought humans into contact with wildfires. According to the National Fire Protection Agency (NFPA), every year, wildfires burn across the United States and a growing number of people are living where wildfires are a real risk. In 2018 more than 58,000 fires burned nearly 9 million acres across the US. More than 25,000 structures were destroyed, including 18,137 residences and 229 commercial structures. California accounted for the highest number of structures lost in one state due to the number of significant fires, including the Mendocino Complex, Carr, Camp and Woolsey fires.

  The IWUIC is a model code that is intended to be adopted and used supplemental to the adopted building and fire codes of a jurisdiction. The unrestricted use of property in wildland-urban interface areas is a potential threat to life and property from fire and resulting erosion. The IWUIC has as its objective the establishment of minimum special regulations for the safeguarding of life and

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  property from the intrusion of fire from wildland fire exposures and fire exposures from adjacent structures and to prevent structure fires from spreading to wildland fuels, even in the absence of fire department intervention.

  Safeguards to prevent the occurrence of fires and to provide adequate fire protection facilities to control the spread of fire in wildland-urban interface areas are provided in a tiered manner commensurate with the relative level of hazard present.

  ARRANGEMENT AND FORMAT OF THE 2025 CWUIC

  The format of the CWUIC allows each chapter to be devoted to a particular subject. The following table shows how the CWUIC is divided. The chapter synopses detail the scope and intent of the provisions of the CWUIC.

  CHAPTER TOPICS	Col2
  CHAPTER	SUBJECT
  1-2	Administration and Definitions
  3-4	Wildland-Urban Interface Area Designation and Requirements
  5	Building Construction Regulations
  6	Fire Protection Requirements
  7	Referenced Standards
  Appendices A-I	Adoptable and Informational Appendices

  Chapter 1 Scope and Administration.

  Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

  Chapter 2 Definitions.

  Chapter 2 is the repository of the definitions of terms used in the body of the code. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

  Chapter 3 Wildland-Urban Interface Areas.

  Chapter 3 provides for the fundamental aspect of applying the code—the legal declaration and establishment of wildland-urban interface areas within the adopting jurisdiction, mapping of the area, periodic review and updates.

  Chapter 4 Wildland-Urban Interface Area Requirements.

  The requirements of Chapter 4 apply to all occupancies in the wildland-urban interface and pertain to all of the following:

  1. Fire service access to the property that is to be protected, including fire apparatus access roads and off-road driveways.

  2. Premises identification.

• CWUIC § 1.5 High relevance — show source text

  
  Division 1.5
  Section|Title 19,
  Division 1
  Section|Gov Code
  Section|PRC
  Section|HSC
  Section| |---|---|---|---|---|---|---|---|---|---|---| |Section|Title|Title|Title|Title|Title|Title|Title|Title|Title|Title| |Chapter 4|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements| |403.2.5|Address installation,
  location, and visibility|Y||||1274.04(a)
  1274.04(b)
  1274.04(c)
  1274.04(d)
  1274.04(e)
  1274.04(f)||||| |404|Water supply|Y||||1275.02||||| |404.1|General|Y|||507|1275.02(b)||||| |404.2|Required water supply|Y||||1275.02(c)||||| |404.3|Draft sites|Y||||||||| |404.3.1|Access|Y|||507.5.4|||||| |404.3.2|Pumper access points|Y|404.3.2|||||||| |404.4|Hydrants|Y|||507.5|||||| |404.5|Adequate water
  supply|Y|||507.3|1275.02(b)||||| |404.6|Reserved|N||||||||| |404.7|Obstructions|Y|||507.5.4|||||| |404.8|Identification|Y||||1275.04(a)||||| |404.9|Testing and
  maintenance|Y|||507.5.2|||||| |404.10|Reliability|Y|||507.5.2|||||| |404.10.1|Objective|Y|404.10.1|||||||| |404.10.2|Clearance of fuel|Y|||4907.1|||||| |404.10.3|Standby power|Y|||507.5.2|||||| |Chapter 5|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations|Special building construction regulations| |501|General|Y||701A||||||| |501.1|Scope|Y||701A.3||||||| |501.2|Objective|Y||701A.2||||||| |501.3|Fire-resistance-rated
  construction|Y||703.2.1.5||||||| |501.4|Noncombustibility
  tests|Y||703.3||||||| |501.4.1|Noncombustible
  materials|Y||703.3.

• CWUIC § 302.1 High relevance — show source text

  2|Purpose|Y|||||||51176|4201| |302|Wildland-Urban
  Interface Area
  Designations|Y||||||||| |302.1|Mapping|Y|||4904.2||||51178|4202
  4203(a)
  4204| |302.2|Review of wildland-
  urban interface areas|Y|||||||51181|4204| |Chapter 4|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements| |401|General|Y||||||||| |401.1|Scope|Y||||||||| |401.2|Objective|Y||||1273.00||||| |401.3|General safety
  precautions|Y||||||||| |402|Applicability|Y|||||||||

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  APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

  2025 CWUIC—continued	Col2	Adopted Yes/No	IWUIC Section	CBC Section	CFC Section	Title 14, Division 1.5 Section	Title 19, Division 1 Section	Gov Code Section	PRC Section	HSC Section
  Section	Title	Title	Title	Title	Title	Title	Title	Title	Title	Title
  Chapter 4	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements
  402.1	Subdivisions	Y
  402.1.1	Access	Y			503
  402.1.2	Water supply	Y			507
  402.1.2.1	Parcel map approval	Y						1275.01
  402.2	Individual structures	Y			503 507
  402.2.1	Access	Y			503
  402.2.2	Water supply	Y			507
  402.3	Existing conditions	N			505.1
  403	Access	Y				1273
  403.1	General	Y				1273.00
  403.1.1	Section 403 definitions	Y				1270.01(f)
  403.1.2	Width	Y				1273.01(a) 1273.

• CWUIC § 1.7 Medium relevance — show source text

  1.7_|Turnouts|Y||||1273.06||||| |403.1.8|Road and driveway
  structures|Y||||1273.07(a)
  1273.07(b)
  1273.07(c)
  1273.07(d)||||| |403.1.9|Dead-end roads|Y||||1273.08(a)
  1273.08(b)||||| |403.10|Gate Entrances|Y||||1273.09(a)
  1273.09(b)
  1273.09(c)
  1273.09(d)||||| |403.2|Signing and Building
  Numbering|Y||||Article 3||||| |403.2.1|Intent|Y||||1274.00||||| |403.2.2|Road signs|Y||||1274.01||||| |403.2.3|Road Sign
  Installation, Location
  and Visibility|Y||||1274.02(a)
  1274.02(b)
  1274.02(c)
  1274.02(d)||||| |403.2.4|Addresses for
  Buildings|Y||||1274.03(a)
  1274.03(b)
  1274.03(c)||||| ||||||||||||

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  APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

  2025 CWUIC—continued	Col2	Adopted Yes/No	IWUIC Section	CBC Section	CFC Section	Title 14, Division 1.5 Section	Title 19, Division 1 Section	Gov Code Section	PRC Section	HSC Section
  Section	Title	Title	Title	Title	Title	Title	Title	Title	Title	Title
  Chapter 4	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements	Wildland-urban interface area requirements
  403.2.5	Address installation, location, and visibility	Y				1274.04(a) 1274.04(b) 1274.04(c) 1274.04(d) 1274.04(e) 1274.04(f)
  404	Water supply	Y				1275.02
  404.1	General	Y			507	1275.02(b)
  404.2	Required water supply	Y				1275.02(c)
  404.3	Draft sites	Y
  404.3.1	Access	Y			507.5.4
  404.3.

• CWUIC § 1.11. Medium relevance — show source text

  • The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Wildland-Urban Interface Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

  The California Code of Regulations (CCR), Title 14, Division 1.5 provisions that are found in the California Wildland-Urban Interface Code are not listed in the Matrix Adoption Tables as they are not within the State Fire Marshal’s authority to adopt. These provisions are a reprint from the current CCR, Title 14, Division 1.5 text for the code user’s convenience only and are identified in the body of the code by square brackets containing references to applicable Title 14 sections.

  2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE APPENDIX A-1

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  APPENDIX A-2 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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  A GENERAL REQUIREMENTS

  The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.

  User notes:

  About this appendix: Appendix A, while not part of the code, can become part of the code when specifically included in the adopting ordinance. Its purpose is to provide fire protection measures supplemental to those found in Chapter 6 to reduce the threat of wildfire in a wildland-urban interface area and improve the capability for controlling such fires. This appendix includes detailed requirements for vegetation control; the code official’s authority to close wildland-interface areas in times of high fire danger; control of fires, fireworks usage and other sources of ignition; storage of hazardous materials and combustibles; bans on the dumping of waste materials and ashes and coals in wildland-urban interface areas; protection of pumps and water supplies; and limits on temporary uses within the wildland-urban interface area.

  SECTION A101—GENERAL

  A101.1 Scope. The provisions of this appendix establish general requirements applicable to new and existing properties located within wildland-urban interface areas .

  A101.2 Objective. The objective of this appendix is to provide necessary fire protection measures to reduce the threat of wildfire in a wildland-urban interface area and improve the capability of controlling such fires.

  SECTION A102—VEGETATION CONTROL

  A102.1 General. Vegetation control shall comply with Sections A102.2 through A102.4.

  A102.2 Clearance of brush or vegetative growth from roadways. The code official is authorized to require areas within 10 feet (3048 mm) on each side of portions of fire apparatus access roads and driveways to be cleared of nonfire-smart vegetation growth.

  Exception: Single specimens of trees, ornamental vegetative fuels or cultivated ground cover, such as green grass, ivy, succulents or similar plants used as ground cover, provided they do not form a means of readily transmitting fire.

• CWUIC § 1203 Medium relevance — show source text

  A107.5 Protection of electrical power supplies. Where electrical pumps are used to provide the required water supply, such pumps shall be connected to a standby power source to automatically maintain electrical power in the event of power loss. The standby power source shall be capable of providing power for not less than 2 hours in accordance with Chapter 27 of the California Building Code, Section 1203 of the California Fire Code and the California Electrical Code.

  Exception: A standby power source is not required where the primary power service to pumps is underground as approved by the code official.

  SECTION A108—LAND USE LIMITATIONS

  A108.1 General. Temporary fairs, carnivals, public exhibitions and similar uses must comply with all other provisions of this code in addition to enhanced ingress and egress requirements.

  A108.2 Objective. The increased public use of land or structures in wildland-urban interface areas increases the potential threat to life safety. The provisions of this section are intended to reduce that threat.

  A108.3 Permits. Temporary fairs, carnivals, public exhibitions or similar uses shall not be allowed in a designated wildland-urban interface area, except by permit from the code official.

  Permits shall incorporate such terms and conditions that will reasonably safeguard public safety and property.

  A108.4 Access roadways. In addition to the requirements in Section 403, access roadways shall be not less than 24 feet (7315 mm) wide and posted NO PARKING. Two access roadways shall be provided to serve the permitted use area.

  Where required by the code official to facilitate emergency operations, approved emergency vehicle operating areas shall be provided.

  APPENDIX A-6 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  APPENDIX A—GENERAL REQUIREMENTS

  SECTION A109—REFERENCED STANDARDS

  A109.1 General. See Table A109.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title and the section or sections of this appendix that reference the standard.

  TABLE A109.1—REFERENCED STANDARDS	Col2	Col3
  STANDARD ACRONYM	STANDARD NAME	SECTIONS HEREIN REFERENCED
  CBC—25	California Building Code	A107.5
  CFC—25	California Fire Code	A104.6, A105.1, A107.5
  CEC—25	California Electrical Code	A107.5

  2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE APPENDIX A-7

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  APPENDIX A-8 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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  CALIFORNIA WILDLAND-URBAN INTERFACE CODE – MATRIX ADOPTION TABLE

  APPENDIX B – VEGETATION MANAGEMENT PLAN

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  (Not adopted by the State Fire Marshal)

• CWUIC § 603.4.2 Medium relevance — show source text

  Trees 603.4.2

  2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE INDEX-1

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  INDEX

  Undeveloped Ridgeline 202 Unenclosed Accessory Structure 202

  Vegetation Control Appendix A, A102 Vegetation management compliance 106.4 Vegetation Management Plan Appendix B Vents 504.10

  Vertical Curve 202

  Water Supply Adequate water supply 404.5 Applicability 402 Draft sites 404.3 Hydrants 404.4 Identification 404.8

  Obstructions 404.7 Reliability 404.10 Required water supply 404.2 Subdivisions 402.1 Testing and maintenance 404.9 Water sources 404.2

  Wildfire 202

  Wildland 202

  Wildland-Urban Interface Area 202

  Wildland-Urban Interface Area Designations 302 Declaration 302.1

  Mapping 302.2 Review 302.3

  INDEX-2 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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  HISTORY NOTE APPENDIX

  2025 California Wildland-Urban Interface Code California Code of Regulations, Title 24, Part 7

  HISTORY:

  1. (SFM 08/24)—Adoption by reference of the 2024 International Wildland-Urban Interface Code with necessary amendments relocated from the California Building Code, California Residential Code and California Fire Code to become the 2025 Califor- nia Wildland-Urban Interface Code . Approved by the California Building Standards Commission on February 26, 2025, filed with Secretary of State on March 7, 2025, and effective on January 1, 2026.

  2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE HIST-1

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  HIST-2 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

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  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

• CWUIC § 1.11. Medium relevance — show source text

  Additionally, make sure you have 10 feet (3048 mm) of clearance_ around your wood piles. 9. Fences—remove or relocate all vegetation, combustibles and combustible debris adjacent to and underneath fences. 10. Replace wood mulch products within five feet (1524 mm) of all structures with noncombustible products such as dirt, stone, or gravel. 11. Remove all dead or dying grass, plants, shrubs, trees, branches, leaves, weeds, and pine needles within 30 feet (9144 mm) of all structures or to the property line. 12. Be sure to store combustible outdoor furnishings away from your home when not in use. 13. Remember to properly store retractable awnings and umbrellas when not in use so they do not collect leaves and embers.

  APPENDIX G-4 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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  CALIFORNIA WILDLAND-URBAN INTERFACE CODE – MATRIX ADOPTION TABLE

  APPENDIX H – REFERENCED CALIFORNIA DOCUMENTS

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  (Not adopted by the State Fire Marshal)

  Adopting Agency	BSC	BSC- CG	SFM	Col5	HCD	Col7	Col8	DSA	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
  Adopting Agency	BSC	BSC- CG	T-24	T-19*	1	2	1/AC	AC	SS	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
  Adopt Entire Chapter
  Adopt Entire Chapter as amended (amended sections listed below)
  Adopt only those sections that are listed below
  [California Code of Regulations, Title 19, Division 1]
  Chapter / Section

  • The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Wildland-Urban Interface Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
• CWUIC § 4.1 Medium relevance — show source text

  4|Combustible
  materials|N||||||||| |A105.4.1|Individual piles|N||||||||| |A105.4.2|Separation|N||||||||| |A106|Dumping|N||||||||| |A106.1|Waste material|N||||||||| |A106.2|Ashes and coals|N||||||||| |A107|Protection of pumps
  and water storage
  facilities|N||||||||| |A107.1|General|N||||||||| |A107.2|Objective|N||||||||| |A107.3|Fuel modification
  area|N||||||||| |A107.4|Trees|N||||||||| |A107.5|Protection of electri-
  cal power supplies|N||||||||| |A108|Land use limitations|N||||||||| |A108.1|General|N||||||||| |A108.2|Objective|N||||||||| |A108.3|Permits|N||||||||| |A108.4|Access roadways|N||||||||| |A109|Referenced standards|N||||||||| |A109.1|General|N|||||||||

  APPENDIX H-34 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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  APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

  2025 CWUIC—continued	Col2	Adopted Yes/No	IWUIC Section	CBC Section	CFC Section	Title 14, Division 1.5 Section	Title 19, Division 1 Section	Gov Code Section	PRC Section	HSC Section
  Section	Title	Title	Title	Title	Title	Title	Title	Title	Title	Title
  Appendix B	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan	Vegetation management plan
  B101	General	N
  B101.1	Scope	N
  B101.2	Plan content	N
  B101.3	Fuel modification	N
  Appendix C	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	Community Wildland-Urban Interface (WUI) Fire Hazard Evaluation Framework	**_Community Wildland-Urban Interface (WUI)

• CWUIC § 1270.01 Medium relevance — show source text

  1|||||| ||Strategic
  ridgeline (T14)|Y||||1270.01(dd)||||| ||Structure|Y|202|||1270.01(ee)||||| ||Subdivision|Y||||||||| ||Tree crown|Y||||||||| ||Undeveloped
  ridgeline (T14)|Y||||1270.01(ii)||||| ||Unenclosed acces-
  sory structure|Y||||||||| ||Vertical curve (T14)|Y||||1270.01(k)||||| ||Wildfire|Y||702A|4902.1|||||| ||Wildfire exposure|Y||702A|4902.1|||||| ||Wildland|Y||||||||| ||Wildland-urban inter-
  face area|Y||702A|4902.1|||||| |Chapter 3|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas|Wildland-urban interface areas| |301|General|Y||||||||| |301.1|Scope|Y||||||||4201| |301.2|Purpose|Y|||||||51176|4201| |302|Wildland-Urban
  Interface Area
  Designations|Y||||||||| |302.1|Mapping|Y|||4904.2||||51178|4202
  4203(a)
  4204| |302.2|Review of wildland-
  urban interface areas|Y|||||||51181|4204| |Chapter 4|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements|Wildland-urban interface area requirements| |401|General|Y||||||||| |401.1|Scope|Y||||||||| |401.2|Objective|Y||||1273.00||||| |401.3|General safety
  precautions|Y||||||||| |402|Applicability|Y|||||||||

  APPENDIX H-26 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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  APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

  |2025 CWUIC—continued|Col2|Adopted
  Yes/No|IWUIC
  Section|CBC
  Section|CFC
  Section|Title 14,
  Division 1.5
  Section|Title 19,