Does My House Need Seismic Retrofitting? A Plain Checklist
If you can answer yes to all five of these — wood-framed, built before 1980, raised foundation with a crawl space, a cripple wall short stub between the foundation and the first floor, and a water heater that is not strapped to the wall — your house is the textbook brace-and-bolt candidate. Soft-story (living space over the garage) is a separate yes/no. Slab-on-grade homes are generally not in scope for these programs.
The five-point candidate check
- Built before 1980? Find your build year on the title report or the county assessor record. Pre-1980 is the cutoff for the EBB grant and the CEA discount.
- Wood-framed construction? Almost all California single-family homes from this era are wood-framed. Masonry or steel-framed homes are different scope.
- Raised foundation with crawl space? If you have a crawl space hatch — typically in a closet or hallway floor, or a small door at the foundation perimeter — you have a raised foundation. Slab homes have no hatch.
- Cripple wall present? Open the hatch. Short stud walls between concrete and first floor = cripple wall. Sometimes there is no cripple wall; the framing sits on a stem-wall directly. Both count as raised foundation for EBB.
- Water heater strapped to the framing? Required for the CEA discount. Two metal straps, one upper third and one lower third, anchored into studs. California Plumbing Code §508.2 requires it anyway.
Five yeses and you are the textbook candidate. Now check your ZIP for EBB on CRMP, then run the calculator.
The two off-ramps
Off-ramp 1: soft story
Living space over an open garage door is a different failure mode and a different program (ESS, up to $13,000 grant). Even if you check all five boxes above, a soft-story condition is its own separate yes/no — you can have both.
Off-ramp 2: hillside or post-and-pier
Hillside homes and post-and-pier foundations are retrofit candidates but standard brace-and-bolt is not the scope. These need engineered plans; budget $7,000–$20,000. The EBB grant may still apply if your ZIP and configuration qualify, but the work is more complex.
When to call a structural engineer
- You see cracks in the foundation, sloping floors, or deflection in the cripple wall studs that suggest existing damage.
- You have a hillside home with a long downhill cantilever.
- You have an unreinforced masonry chimney over a roofline.
- You are doing a major remodel anyway — the engineering can roll into the same plan set.
Strict cost ranges across foundation types are summarized in brace + bolt cost and soft-story cost. The grant and insurance math is on the grant page and the CEA discount page.
FAQ
How do I know if I have a cripple wall?
Open the crawl-space hatch. If you see short stud walls (typically 1–4 feet tall) between the concrete foundation and the first-floor framing, that is a cripple wall. If the first-floor framing sits directly on the foundation with no stub wall, you have a stem-wall configuration — also EBB-eligible.
Is my house definitely a candidate if it was built before 1980?
Almost always yes for the wood-framed raised-foundation case, in the Bay Area, LA, and other quake zones. But EBB is ZIP-restricted, so program eligibility is a separate test from structural candidacy. The CEA discount also requires the wood-framed, non-slab criteria.
What if I have a hillside or post-and-pier foundation?
You are a retrofit candidate but standard brace-and-bolt is not the scope — you need engineering. Costs run $7,000–$20,000 typically. See the calculator's "hillside / post-and-pier" option.
What if I have a soft story?
Different problem, different program. Use the ESS path. See soft-story retrofit cost.
Does a slab-on-grade home need a retrofit?
Slab-on-grade homes do not have the brace-and-bolt failure mode (no sill plate to slide, no cripple wall to fold). They have other potential issues (chimney, garage moment frame on a two-story) but are not EBB candidates. Talk to a structural engineer if you have a specific concern.
Continue your survey
- 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.