California SB 283.
What developers and AHJs need to know about the new BESS fire authority consultation requirement.
Senate Bill 283 took effect January 1, 2026. For battery energy storage projects at or above 10 megawatt-hours installed on or after that date, a fire authority consultation is no longer best practice — it is a statutory prerequisite to the permit application itself. This page explains what the law requires, who it applies to, and what a compliant process looks like end-to-end.
What SB 283 requires.
SB 283 establishes a mandatory consultation between the BESS project applicant and the local fire authority before the permit application is submitted to the Authority Having Jurisdiction. The consultation must address the fire safety elements of the proposed installation — including site layout, energy storage technology, fire detection and suppression approach, emergency response planning, and any alternative means of compliance the applicant intends to pursue.
The applicant is required to document the consultation, incorporate the fire authority's input into the permit application, and present the documented consultation summary as part of the permit submittal package. The fire authority's role is advisory during the consultation; enforcement authority remains with the AHJ at the permitting and inspection stages.
Who it applies to.
The requirement applies to stationary battery energy storage systems with an aggregate rated energy capacity of 10 MWh or greater, installed on a permitted site on or after January 1, 2026. Smaller systems are not subject to the consultation requirement, though they remain subject to the full fire and building code compliance obligations under NFPA 855 (2023 edition, adopted into California Title 24) and local amendments.
Verify the specific statutory threshold and effective date language against the current chaptered SB 283 text before relying on this summary for any compliance decision. This page is informational, not legal or engineering advice.
Timeline implications — why late is expensive.
The consultation is not a same-day phone call. Fire authorities in California's largest jurisdictions are already experiencing volume pressure, and lead times to schedule a substantive consultation meeting are trending toward two to six weeks depending on county and season. For projects under a 45-day permit timeline, treating the consultation as a checkbox late in the process is how projects slip into the next quarter.
A well-prepared pre-consultation package — project narrative, preliminary site plan, ESS specifications, proposed installation standard, and a first-draft fire suppression approach — reduces the meeting itself to a single session, reduces the AHJ's review burden, and positions the permit for first-pass acceptance.
Where the HMA fits.
The consultation meeting surfaces concerns. The Hazard Mitigation Analysis under NFPA 855 is where those concerns are analytically addressed. The meeting is the input. The HMA is the output. The HMA should answer, in writing, every fire safety concern the fire authority raised, cite the applicable NFPA 855 methodology, and document the remediation pathway — prescriptive compliance, empirical UL 9540A data, or performance-based alternative — for any deficiency identified.
Where the installation cannot meet prescriptive separation distances, NFPA 855 provides three remediation pathways: passive fire barriers extending 5 feet above and 5 feet beyond the clearance boundary, demonstration via UL 9540A large-scale fire test data that propagation will be contained, or site redesign to meet prescriptive distances. HGS documents the options. The developer, with the engineer of record, selects the pathway.
How HGS supports SB 283 compliance.
We support both sides of the consultation relationship.
For BESS developers, we prepare the pre-consultation package, attend the meeting as technical support, document the consultation, and integrate the findings into the HMA and permit submittal. For AHJs and fire authorities, we can provide technical review support, compliance framework templates, and third-party peer review on HMAs submitted by applicants.
Our scope is consulting. We document findings, present options, and coordinate between parties. We do not serve as engineer of record and we do not sign design drawings. That boundary protects all parties and keeps the compliance work separated from the licensure scope.
Have a project approaching SB 283 threshold?
We can tell you within 30 minutes whether your project is ready, what's missing, and what the compliance path looks like.