Seismic retrofit cost in California, after the grant.
A standard brace-and-bolt retrofit on a pre-1980 raised-foundation home runs $3,000–$7,000; CRMP reports 76% of EBB retrofits come in under $7,000. Hillside and post-and-pier projects run $7,000–$20,000; soft-story retrofits $15,000–$50,000. The calculator subtracts the grant and projected CEA discount for your net number.
An independent reference for California homeowners. We show what a brace + bolt or soft-story retrofit actually costs, what the EBB or ESS grant covers, and what a decade of CEA insurance discount is worth. Verified figures from CRMP and CEA, no quotes, no referrals.
Net cost calculator
As of 2026-06-07Estimate only. Cost depends on crawlspace access, plan complexity and your local market. Always get a written quote from a California-licensed contractor and an inspection from a structural engineer. EBB and ESS grants are ZIP-restricted and have open and closed registration windows. See sources and disclaimer.
Survey sheets — eight questions, answered
Each sheet is a single focused question with verified figures and inline source chips. Together they cover the full cost picture: what to budget gross, what to subtract, and whether to do it at all.
What a standard pre-1980 raised-foundation retrofit actually costs, with and without the grant.
Living space over the garage. Single-family-home range, not commercial multi-unit ordinance numbers.
Up to $3,000 base, plus up to $7,000 supplemental if your income is at or under $94,480.
10–25 percent off the CEA earthquake premium for a retrofitted raised-foundation home built before 1980.
A plain checklist: pre-1980, raised foundation, cripple wall, soft story, unsecured water heater.
On-site days plus permits, plan check and CEA verification paperwork. End-to-end timeline.
The honest math: grant + insurance savings + life-safety vs the do-nothing cost.
The cheapest item on the sheet: $25–$50 DIY, $150–$400 hired, and required by California plumbing code.
Brace it or remove it: $1,500–$5,000 to brace, $3,000–$8,000+ for full removal, and how to decide.
The engineered tier: $7,000–$20,000 hillside, $10,000–$15,000 post-and-pier, plus the design fee.
Common questions
What does a seismic retrofit cost in California?
A standard brace-and-bolt retrofit on a pre-1980 raised-foundation home runs $3,000 to $7,000; CRMP self-reports that 76 percent of EBB retrofits come in under $7,000. Hillside and post-and-pier projects run $7,000 to $20,000. Single-family soft-story retrofits run $15,000 to $50,000. The calculator on this page subtracts the grant and the projected CEA discount so you see the net number.
How much is the Earthquake Brace + Bolt grant?
Up to $3,000 base, plus up to $7,000 supplemental for households with annual income at or under $94,480. Stacked, that is up to $10,000 toward an EBB-eligible retrofit. ESS soft-story grants are up to $13,000. EBB and ESS are ZIP-restricted; verify your address on CRMP.
How much does the CEA insurance discount save?
Between 10 and 25 percent off your CEA earthquake-insurance premium for a wood-framed single-family home built before 1980 with a raised or non-slab foundation. The exact tier depends on foundation type and build year. The discount runs every renewal for as long as the home stays qualified, so the 10-year savings can be the largest single line item after the grant.
Does my house even need a retrofit?
The candidate profile is: built before 1980, wood-framed, raised foundation with a crawl space, cripple wall present, water heater not strapped. Soft-story is its own check (living space over the garage). Slab-on-grade homes are generally not EBB candidates. See the diagnostic checklist.
Are we a contractor?
No. We do not sell retrofits, refer to contractors, or take affiliate commissions. We cite primary sources (CRMP, CEA) and date every figure. About this project.
More detail across the eight sheets. Open the sources page for every figure with its primary citation.