Earthquake Brace + Bolt (EBB) is a California grant program that pays up to $3,000 toward bolting a wood-framed house down to its foundation and bracing its cripple walls. Your house is likely to qualify if it was built before 1980, sits on a raised foundation or crawl space, is in an eligible ZIP code, and has not already been retrofitted. The grant is a contribution, not a full ride: a straightforward single-story bolt-and-brace in Southern California typically runs $3,000 to $7,000, so most homeowners end up paying something out of pocket. Income-eligible households can add a supplemental grant on top — in Southern California, $2,650 for a full brace-and-bolt.
Green Design and Build is a licensed residential general contractor, CSLB #1110975, based in Van Nuys and working across Los Angeles, Orange, Ventura and the western parts of Riverside and San Bernardino counties. We do seismic retrofit work on raised-foundation houses across the San Fernando Valley and the surrounding basin. The figures below are budgeting ranges, not a quote — every crawl space is different, and nobody can price one honestly without going under the house.
What a brace-and-bolt retrofit actually is
Older California houses were framed and then simply set on their foundations. Nothing meaningful ties the two together. In a strong shake the house can slide sideways off the concrete, or the short stud wall between the foundation and the floor can fold over. Either failure takes a house that was structurally fine and makes it uninhabitable.
The retrofit fixes both failure modes. The California Residential Mitigation Program, which administers EBB, describes the work in three parts, and the technical rules come from Chapter A3 of the California Existing Building Code — “Prescriptive Provisions for Seismic Strengthening of Cripple Walls and Sill Plate Anchorage of Light, Wood-Frame Residential Buildings”.
Foundation bolting
Anchor bolts or steel foundation plates are installed through the mudsill — the horizontal timber sitting on top of the concrete — and into the foundation itself. On an existing house these are usually expansion or epoxy anchors drilled in from the crawl space, at a spacing the code sets. This is what stops the house sliding.
Cripple wall bracing
A cripple wall is the short stud wall between the top of the foundation and the underside of the first floor — the thing that gives you a crawl space. Bracing means sheathing it in structural plywood or OSB, with a specified nailing pattern and ventilation holes cut back in. A braced cripple wall behaves like a shear wall instead of a row of loose sticks.
Not every house has one. Some raised foundations use a continuous stem wall that runs straight up to the floor framing, in which case there is nothing to brace and the job is bolting only — which is cheaper, and the grant covers proportionally more of it.
Water heater strapping
The third element is securing the water heater so it cannot topple and tear off its gas, water or electrical connections. It is a small job relative to the rest, and it is the one part of a retrofit a reasonably handy homeowner can sensibly look at themselves.
What the program does not cover
EBB explicitly excludes chimney work. It also does not pay for the things a crawl space inspection tends to turn up along the way: dry rot in the mudsill, termite damage, failed drainage, a cracked or crumbling foundation, or subfloor repairs. Those are ordinary foundation and structural repairs, priced separately — see our guide to foundation repair cost in Los Angeles and the warning signs a foundation needs repair.
Does your house qualify for the EBB grant?
Short answer: a pre-1980 wood-framed house on a raised foundation, on level ground or a slight slope, in an eligible ZIP code, that has not already had a brace-and-bolt retrofit. CRMP publishes the criteria on its See If You Qualify page, and the ZIP code list is the part that catches people out — eligibility is drawn by seismic risk, not by city.
| Requirement | What it means in practice |
|---|---|
| Built before 1980 | The cut-off reflects when bolting and bracing became normal practice. A 1976 house almost certainly needs it; a 1985 house almost certainly does not. |
| Wood-frame construction | Standard for houses of this era across the Valley and the basin. |
| Raised foundation or crawl space | If your floor is concrete poured on the ground, the program does not apply. Chapter A3 excludes slab-on-grade buildings. |
| Level ground or a slight slope | Hillside houses on posts and piers are a different engineering problem and fall outside the prescriptive rules. |
| Eligible ZIP code | Check the current list on the program site before doing anything else. |
| Not already retrofitted | Partial or DIY work done previously can complicate this — say so when you register. |
| Cripple walls no more than 4 feet | Taller cripple walls need a registered design professional rather than the prescriptive code path. |
| Up to three stories | Chapter A3 also excludes buildings with more than four dwelling units. |
One thing worth knowing: the program used to require the house to be your primary residence. In its August 2025 announcement, the California Earthquake Authority said the grant program was being expanded to rental and non-primary residential properties. If you own a rental bungalow in Glendale or a duplex in Pasadena, it is worth re-checking rather than assuming the old rule still applies.
How much does a seismic retrofit cost after the grant?
Direct answer: most straightforward single-story brace-and-bolt jobs in Southern California land between $3,000 and $7,000. With a $3,000 grant applied, a homeowner at the lower end of that range can be close to fully covered, and one at the upper end pays a few thousand.
| Scope | Typical range | What drives it |
|---|---|---|
| Standard bolt-and-brace, single-story | $3,000 – $7,000 | Crawl space you can actually move in, reasonable perimeter, no surprises |
| Larger house or difficult access | $7,000 – $15,000 | Long perimeter, tight or shallow crawl space, multiple interior foundation lines, debris removal |
| Engineered retrofit | $15,000 – $40,000+ | Hillside house, tall cripple walls, posts and piers, or anything outside the prescriptive code path |
These are budgeting ranges for planning, not a quote. The single biggest variable is access. A crawl space with three feet of headroom and a clear run around the perimeter is a different job from an eighteen-inch void full of old ducting, and the labor difference is substantial. The second biggest is what is found once someone is under there — see the note on dry rot above.
If you want context on how contractor pricing is built up generally, we set it out in what a Los Angeles general contractor costs.
The supplemental grant for income-eligible households
Alongside the standard $3,000, CRMP runs a supplemental grant for income-qualified households. It is a fixed amount that depends on where you live and what your house needs. According to CRMP’s supplemental grant page, in Southern California it is $2,650 for a brace-and-bolt retrofit and $1,125 for bolt-only. CRMP says that combined with the $3,000 base grant, the supplemental grant may cover up to 100% of the retrofit cost for most eligible homeowners.
For the 2025 program, CRMP set the income limit at an annual household income of $94,480 or less, and states that the figure is updated annually by the California Department of Housing and Community Development. Check the current number on that page before relying on it. Supplemental grants are awarded until the funds run out, which rewards registering early rather than deliberating, and CRMP asks for the income verification request within 30 days of acceptance into the program.
When can you register?
EBB does not accept registrations continuously. CRMP opens a registration window for a limited time, at least once a year, and announces it on its own site and through the California Earthquake Authority. The most recent window we can confirm from those sources ran from 20 August to 1 October 2025, and was later extended to 17 October 2025.
Because the dates move, do not take a window from an article — ours included. Go to the program’s own EBB page and check whether registration is currently open. If it is closed, sign up to be notified; the sensible move is to get the inspection and the quote done in the meantime so you are ready to act when the window opens rather than scrambling inside it.
Do you need a permit in Los Angeles?
Yes — and in the City of Los Angeles it is unusually easy. LADBS lists residential seismic retrofit work on its express permits schedule, meaning no plan check is required. Its published list includes adding sill plate anchor bolts and plywood to cripple walls per L.A. City Standard Plan #1, as earthquake hazard reduction under Chapter 92 of the Los Angeles Building Code, for houses and residential buildings up to three stories and up to four units. A second item covers the same work where the foundation is also being replaced.
Practically, that means a compliant bolt-and-brace retrofit in the City of LA does not need engineered drawings or a plan-check queue — the standard plan is the drawing. That is a real saving in both time and fee, and it is one reason retrofits are among the least painful permits we pull. For how LA permit fees are calculated more broadly, see our breakdown of LADBS permit costs.
Outside the City of LA the process differs by jurisdiction. Santa Monica, Glendale, Pasadena, Burbank and the county areas each run their own building departments, and while most have an equivalent simplified path for voluntary retrofits, the forms and fees are not the same. Confirm with the department that has jurisdiction over your address, not the one nearest to it.
Is a retrofit required by law?
Not for a single-family house. This is worth stating plainly because the mandatory retrofit ordinances get a lot of press and homeowners often assume they are caught by them.
Los Angeles Ordinance No. 183893 created two mandatory programs. Division 93 covers pre-1978 wood-frame buildings with soft, weak or open-front wall lines at ground level — and it states that it “shall not apply to any building containing three dwelling units or less if the building is used solely for residential purposes.” Division 95 covers non-ductile concrete buildings and states that it “shall not apply to detached single-family dwellings or detached duplexes.”
So a brace-and-bolt retrofit on a house is voluntary. Nobody will order you to do it, and no deadline applies. That is precisely why the grant exists: the work has a strong safety case but no legal compulsion behind it, so the state subsidizes it to get uptake.
Is it worth doing if you miss the grant?
For a pre-1980 raised-foundation house, generally yes. A few things to weigh honestly:
- The failure it prevents is a total loss, not a repair. A house that slides off its foundation is not patched; it is jacked, moved back and rebuilt from the mudsill up, if it is salvageable at all.
- It is cheap relative to the rest of the house. A few thousand dollars against a property worth many hundreds of thousands is a different risk calculation from most home improvements.
- It may affect earthquake insurance. Some policies offer a premium reduction for a documented, permitted retrofit. Ask your own carrier what evidence they want before the work starts, because retro-documenting it is harder.
- It pairs well with other work. If you are already opening the crawl space for plumbing, a garage conversion, or a whole-home renovation, the marginal cost of doing the retrofit at the same time is lower.
- It is not a fix for an existing problem. If the foundation is already cracked, settling or wet, bolting into it does not help. Deal with the foundation first.
What happens during the work
Most homeowners are surprised by how undisruptive this is. Almost all of it happens below your floor.
- Crawl space inspection. Someone goes under the house, confirms foundation type, measures cripple wall height, checks the mudsill for rot and termite damage, and photographs what they find. This is what a quote should be based on.
- Permit. In the City of LA, an express permit against Standard Plan #1. Elsewhere, whatever the local department requires.
- Access and clearing. The crawl space is cleared enough to work in. Occasionally a small access opening has to be cut.
- Bolting. Holes are drilled through the mudsill into the foundation and anchors installed at the specified spacing. This is the noisy part, and it is usually a day or two.
- Bracing. Plywood is cut, fitted and nailed to the cripple walls, with ventilation restored.
- Water heater strapping, if included.
- Inspection. The building inspector signs it off. Keep the final card — it is the document your insurer will ask for.
You can normally stay in the house throughout. Expect drilling noise during the bolting days and people coming in and out to the crawl space access. A typical job is finished inside a week; larger or awkward houses take longer. Our general approach to sequencing and site conduct is set out in our design-build process.
Choosing a contractor for a brace-and-bolt retrofit
This is a small-ticket job in a specialized area, which makes it attractive to operators who are not licensed. A few protections worth using:
- Verify the license yourself. Do not accept a number on a business card — check it against the CSLB register. We explain how in verifying a contractor’s license in California.
- Get it in writing. CSLB states that in California a written contract is required for all home improvement projects over $500.
- Watch the deposit. CSLB states the down payment “cannot be more than $1,000 or 10 percent of the contract price, whichever is less” on a home improvement job, excluding finance charges. A contractor asking for half up front on a $6,000 retrofit is outside that rule. Our guide to a contractor payment schedule in California goes through this in detail.
- Insist on the permit. An unpermitted retrofit will not satisfy the grant program and will not satisfy an insurer either. If someone offers to skip it to save you money, that tells you what you need to know.
- Ask what happens if they find rot. A good answer is a documented change order with a unit price. A bad answer is silence now and a large number later.
There is more on avoiding the usual traps in how to hire a general contractor without getting scammed, and you can see our own customer reviews and completed projects.
Common mistakes
- Starting the work before registering. Grant programs generally will not reimburse work already done. Register first, then build.
- Assuming a slab house qualifies. It does not, and no amount of paperwork changes that.
- Bolting into a bad foundation. Anchors need sound concrete. If the foundation is failing, the retrofit is the second job, not the first.
- Treating the grant as the budget. $3,000 is a contribution toward a $3,000–$7,000 job. Plan for the difference.
- Skipping the permit to save a few hundred dollars. It invalidates the grant, the insurance benefit and any comfort a future buyer would take from it.
- Doing it yourself to code you have not read. Chapter A3 is prescriptive — anchor spacing, plywood grade, nailing pattern and edge distance all matter. A retrofit that looks right and is nailed wrong performs like no retrofit at all.
Earthquake Brace + Bolt FAQs
How much is the Earthquake Brace + Bolt grant?
Up to $3,000 toward an eligible retrofit. Income-eligible households can also receive a supplemental grant, which in Southern California is $2,650 for a brace-and-bolt retrofit or $1,125 for bolt-only. CRMP says the two grants combined may cover up to 100 percent of the retrofit cost for most eligible homeowners.
Is an earthquake brace and bolt retrofit worth it?
For a pre-1980 house on a raised foundation, the case is strong. The retrofit targets a failure mode that turns a sound house into a total loss, and it usually costs a few thousand dollars on a property worth vastly more. It is not worth doing on a slab house, because the failure mode does not apply, and it should not be done before an already-damaged foundation is repaired.
Does my house qualify if I rent it out?
Possibly. The California Earthquake Authority announced in August 2025 that the grant program was expanding to non-primary residential properties, including rentals. Because program rules change between years, confirm the current position on the CRMP site rather than relying on an older description.
What is a cripple wall?
The short stud wall between the top of the foundation and the underside of the first floor — the wall that creates the crawl space. Unbraced, it is the weakest link in an older raised-foundation house. Bracing it with structural plywood turns it into a shear wall. Under California Existing Building Code Chapter A3, cripple walls over four feet tall fall outside the prescriptive rules and need a registered design professional.
Do I need a permit for a seismic retrofit in Los Angeles?
Yes, but it is a simple one. LADBS lists sill plate anchor bolting and cripple wall plywood per L.A. City Standard Plan #1 on its express permit schedule, which means no plan check is required for houses and residential buildings up to three stories and up to four units. Other cities run their own process.
Is a seismic retrofit legally required for my house?
No. Los Angeles Ordinance No. 183893 exempts residential buildings of three dwelling units or fewer from the soft-story program, and exempts detached single-family dwellings and detached duplexes from the non-ductile concrete program. A brace-and-bolt retrofit on a house is voluntary.
How long does the work take?
A typical single-story brace-and-bolt is finished within a week of starting, and you can usually stay in the house. Larger houses, long perimeters and tight crawl spaces take longer. The bigger variable is scheduling around the permit and the inspection rather than the work itself.
Will a retrofit lower my earthquake insurance premium?
It can, but it depends on your policy and carrier, so ask yours directly rather than assuming. What matters is that the retrofit is permitted and signed off, because that final inspection record is the evidence an insurer will want. Arrange the paperwork question before the work begins.
Find out whether your house qualifies
The honest first step is someone going under your house. Ten minutes in the crawl space settles whether you have cripple walls or a stem wall, whether the mudsill is sound, and whether a retrofit is a straightforward few days or something that needs an engineer. We do that as a site visit, typically about two hours, and you get a written scope and a number afterwards — not a figure over the phone.
Green Design and Build is a licensed residential general contractor, CSLB #1110975, in Van Nuys. We are reachable 8am to 6pm daily and reply within one business day. If financing the balance above the grant is a consideration, our financing options page covers what is available.