Santa Ana, CA Building Safety: Fire Sprinkler Requirements (2026)
Key Facts
- New building trigger
- Over 5,000 square feet or more than two stories
- Addition trigger: percentage
- 33% or more of existing area, total over 5000 sq ft
- Addition trigger: size
- Over 2000 square feet added, total over 5000 sq ft
- Addition trigger: height
- A story added above the second floor
- Water supply cap
- 90% of capacity for hydraulically calculated systems
- High static pressure
- Above 100 psi, Table 903.3.5.3 applies if required
- Group R-3 additions
- Follow Section 903.2.8 instead
Summary
Santa Ana requires an automatic sprinkler system in every new building over 5,000 square feet or more than two stories tall, in any occupancy. Additions to existing buildings trigger sprinklers at 33% growth, 2,000 added square feet, or a story above the second floor. Hydraulically calculated designs are capped at 90% of the water supply capacity.
903.2 Where required. Approved automatic sprinkler systems in buildings and structures shall be provided when one of the following conditions exists: 1. New buildings: Notwithstanding any applicable provisions of Sections 903.2.1 through 903.2.21, an automatic sprinkler system shall also be installed in all occupancies when the total building area exceeds 5,000 square feet as defined in Section 202, regardless of fire areas or allowable area, or is more than two stories in height. ... 2. Existing Buildings : Notwithstanding any applicable provisions of this code, an automatic sprinkler system shall be provided in an existing building when an addition occurs and one of the following conditions exists: 2.1 When an addition is 33% or more of the existing building area, and the resulting building area exceeds 5000 square feet. 2.2 When an addition exceeds 2000 square feet, and the resulting building area exceeds 5000 square feet. 2.3 An additional story is added above the second floor regardless of fire areas or allowable area. ... 903.3.5.3 Hydraulically calculated systems . The design of hydraulically calculated sprinkler systems shall not exceed 90% of the water supply capacity.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 32).
Full Breakdown
Municipal Code § 8-102 rewrites California Fire Code Section 903.2 for Santa Ana and sits in Chapter 8, Buildings and Structures. The current text comes from Ordinance NS-3088, adopted January 20, 2026, which amended the section after Ordinance NS-2851 (November 18, 2013) first replaced it in its entirety.
New buildings face the broadest trigger. An automatic sprinkler system is required in all occupancies when the total building area exceeds 5,000 square feet as defined in Section 202, regardless of fire areas or allowable area, or when the building is more than two stories in height. The 5,000 square foot test applies even where Sections 903.2.1 through 903.2.21 would not otherwise demand sprinklers. One exception, subject to approval by the Fire Code Official, covers open parking garages under Section 406.5 of the California Building Code that are smaller than the area stated in Section 903.2.10 (3) or 903.2.10.1 of the California Fire Code.
Existing buildings are caught when an addition is built. A sprinkler system is required if the addition is 33% or more of the existing building area and the resulting building exceeds 5000 square feet, if the addition exceeds 2000 square feet and the resulting building exceeds 5000 square feet, or if an additional story is added above the second floor. Additions to Group R-3 occupancies follow Section 903.2.8 instead. Chapter 8 also states, in Sec. 8-2813, that an additional residential sprinkler system is not required for additions or alterations to existing townhouses, one- and two-family dwellings, and attached garages or carports unless Section 903.2.8 requires one.
Section 903.3.5.3 adds a design cap: a hydraulically calculated sprinkler system shall not exceed 90% of the water supply capacity. When static pressure exceeds 100 psi, and when the fire code official requires it, the system shall not exceed the capacity listed in Table 903.3.5.3.
The building official is the executive director of planning and building or a designee (Sec. 8-3). Permit and plan review fees are set by city council resolution (Sec. 8-5), and the Planning Commission hears appeals on alternate materials and methods of construction but cannot waive code requirements (Sec. 8-4).
Violations & Fines
Under Sec. 8-7, a violation of Chapter 8 is punished as provided in section 1-8 of the Code, and the usual correction procedures apply on top of that. Each separate day, or portion of a day, that a violation occurs or continues is a separate offense. A permit or plan approval never authorizes a violation, and the administrative authority can order construction, operation, or occupancy to stop, or suspend or revoke a permit or certificate of occupancy. A business run contrary to the Code is declared a public nuisance and abated by removing all utilities to the property, with abatement costs recoverable by the City.
Frequently Asked Questions
Does my new Santa Ana building need sprinklers if it is under three stories?
When does an addition force sprinklers into an existing Santa Ana building?
How much of the water supply can a sprinkler design use?
Can I appeal a sprinkler requirement in Santa Ana?
Sources & Official References
Other rules in Santa Ana
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