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San Bernardino, CA Building Safety: Fire Sprinkler Requirements (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Governing section
SBMC § 15.04.250
Scope
residential additions only
Decision basis
water availability + hydrant flow
Decision maker
acting Fire Authority, case-by-case
Chapter effective
Ord. MC-1433, 12-21-2016
Max penalty
$1,000 fine / 6 months jail

Summary

San Bernardino does not impose a blanket sprinkler mandate on home additions. Under § 15.04.250, the acting Fire Authority decides case by case whether a residential addition needs automatic fire sprinklers, based on water availability and existing hydrant fire flow at the project site.

§ 15.04.250 AUTOMATIC FIRE SPRINKLER SYSTEMS - RESIDENTIAL ADDITIONS. The authority to require passive fire suppression (sprinklers) for residential additions will be determined by the acting Fire Authority based on availability of water and existing hydrants fire flow within the area of the proposed structure.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-2: Supplement contains: Local legislation current through Ord. MC-1666, passed 8-5-2026).

Full Breakdown

250, added to the Building Codes chapter by Ord. MC-1433 on December 21, 2016, gives the acting Fire Authority discretion over whether a residential addition needs an automatic fire sprinkler system, rather than fixing a set square-footage or valuation trigger. The standard the code sets is site-specific: the Fire Authority looks at 'availability of water and existing hydrants fire flow within the area of the proposed structure' before deciding. That means two otherwise identical additions in different parts of the city can get different answers depending on local water infrastructure, and an applicant will not know whether sprinklers are required until the Fire Authority reviews the specific plans and site conditions.

020(B)(8), so any sprinkler system the Fire Authority does require must be designed, installed and inspected to that adopted code's standards, administered through the Building Official's permit process. 020. Because the requirement is folded into the building permit rather than a stand-alone approval, no separate hearing or appeal process is listed in this section; the applicant deals directly with the Fire Authority during plan review. 250 was carried forward unchanged through the chapter's 2019, 2020 and 2024 amendments, most recently by Ord. MC-1643, passed October 2, 2024.

Violations & Fines

Installing an addition without the sprinkler system the Fire Authority required, or without the required permit and inspections generally, is treated as a Building Code violation under § 15.04.030 and enforced the same as any other unpermitted work. A sustained violation is a misdemeanor under § 1.12.010(A), punishable by up to $1,000 in fines, six months in county jail, or both, plus the city's investigation costs.

Frequently Asked Questions

Will I have to install fire sprinklers on my home addition in San Bernardino?
Maybe, and it depends on your street rather than the size of the addition: § 15.04.250 leaves the call to the acting Fire Authority, which decides based on water availability and existing hydrant fire flow near your specific project, so you find out during plan review rather than from a fixed size threshold.
Does this rule apply to a brand-new house, not an addition?
No, § 15.04.250 is written specifically for residential additions; new single-family construction is instead governed by the sprinkler provisions of the adopted California Residential Code under § 15.04.020, a separate adopted-code standard rather than this discretionary local section.
Who decides whether my addition needs sprinklers, and can I appeal?
The acting Fire Authority makes the call during plan review based on water and hydrant flow at the site; § 15.04.250 does not set out a separate appeal procedure, so questions are resolved through the standard building-permit plan-review process with the Building Official.

Sources & Official References

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