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Sources and Verification

As of 2026-06-07 · Sources: CRMP · CEA · Independent editorial

Every cost or grant figure on this site cites one of the entries below. We re-verify them quarterly.

Primary regulator and program sources

CRMP — Earthquake Brace + Bolt — source for the $3,000 base grant, $7,000 supplemental, $94,480 income threshold, and the pre-1980 raised-foundation eligibility profile.
CRMP — Earthquake Soft Story — source for the soft-story program scope, eligibility (pre-2000, living space over garage), contractor requirement.
CRMP — How Much Does an Earthquake Retrofit Cost — source for the $3,000–$7,000 brace-and-bolt range, "76% under $7,000" statistic, $15,000–$25,000 soft-story SFR average, $10,000–$15,000 post-and-pier, $13,000 ESS grant figure, and the hillside note.
CEA — Hazard Reduction Discount — source for the 20% / 25% / 10% / 15% / 21% tier table and the AND-list eligibility criteria.
CEA — Inspection Professionals (DRV) — source for who can sign a DRV form (California-licensed GC, civil engineer, structural engineer) and the inspection professional registry.

Custom Home — Bay Area Seismic Retrofit Cost 2026 — used as a Bay Area contractor cross-check on cost ranges. Agrees with CRMP within the noted bands.
Angi — Earthquake Retrofit Cost 2026 Data — used as a national-average cross-check. Numbers align with the CA-specific ranges.
SKS Construction — LA Soft-Story Breakdown 2026 — used to separately mark the LA-mandatory-ordinance commercial multi-unit range so single-family-home readers are not given the wrong number.

The "UC Boulder ~10% home value lift from a retrofit" finding circulates widely. We have not directly verified the underlying paper in this research pass. We mention it only with that caveat.
Specific permit and plan-check fees vary by California county. We use a "$300–$1,500 typical, varies by jurisdiction" caveat rather than a single number.

Reviewer applications and source corrections: review @ seismicretrofitcost.com. We confirm receipt within a week.

As of 2026-06-07

Brace + Bolt Cost What a standard pre-1980 raised-foundation retrofit actually costs, with and without the grant.
Soft-Story Retrofit Cost Living space over the garage. Single-family-home range, not commercial multi-unit ordinance numbers.
Earthquake Brace + Bolt Grant Up to $3,000 base, plus up to $7,000 supplemental if your income is at or under $94,480.