Seismic Retrofitting
Angel Suarez Construction strengthens older homes against earthquakes with code-approved bolt-and-brace, cripple-wall, and soft-story retrofits across the San Francisco Peninsula.
A seismic retrofit makes an older house safer in an earthquake. We bolt the wood frame to its concrete foundation and brace the short cripple walls under the floor. This bolt-and-brace work helps keep a home from sliding off its base when the ground shakes near the San Andreas Fault. It is a smart upgrade for an older Peninsula home.
What is a bolt-and-brace foundation retrofit?
Bolt-and-brace is the most common seismic retrofit for an older wood-frame home. We add strong anchor bolts that tie the house frame to the concrete foundation. Then we brace the cripple walls, the short walls in the crawl space that hold up the first floor. Together these two steps keep the house from sliding or tipping in a quake.
How does cripple wall bracing protect your home?
The cripple wall is often the weakest part of an older house. In a big quake it can fold over and drop the home to the ground. We cover these short walls with structural plywood and nail it tight. This turns a flimsy wall into a stiff panel that holds the house up. We also keep the crawl space vented so it still breathes.
Signs your older home may need a seismic retrofit
Many Bay Area homes built before the 1980s sit on a raised foundation with a crawl space. If your house has an unbolted mudsill, tall cripple walls, or a room built over a garage, it is a strong candidate. Cracks in the foundation, or a home that has never been retrofitted, are also clear signs. If we find deeper damage, our concrete and foundation work can fix it at the same time.
Do you need a soft-story retrofit?
A soft-story home has a weak first floor, often an open garage or carport under living space. That open wall has little to hold it steady when the ground moves. We strengthen it with steel frames, posts, and shear panels sized by an engineer. Soft-story work is common on older Peninsula homes. If you are turning that garage into living space, we can pair the retrofit with a home addition or ADU project.
How seismic retrofitting works, step by step
First we inspect the foundation and crawl space and plan the work. Next we pull the city permit and, when needed, get an engineer's plan. Then our crew installs the anchor bolts, braces the cripple walls, and adds any hardware the plan calls for. The city inspector checks and signs off at the end, so the work is verified.
Seismic retrofitting and the Earthquake Brace + Bolt program
California runs a program called Earthquake Brace + Bolt, or EBB, that helps homeowners pay for this work. It offers grants toward a code-approved bolt-and-brace retrofit on qualifying older homes. As a licensed California general contractor, we build to the state's standard plan set so your retrofit can meet program and code rules. We are glad to walk you through how it works.
Best seismic retrofitting in San Bruno
We serve San Bruno and the nearby Peninsula, where many homes date from the mid-1900s and sit close to active faults. Our team knows the local building departments and the raised-foundation homes common here. We treat every retrofit as protection for your family, not just a checklist. Call us to set up a crawl-space look and an honest plan.
Angel Suarez Construction handles the whole job as one licensed team. Many owners pair a retrofit with other upgrades, from a kitchen remodel or bathroom remodel to new energy-efficient doors and windows. See our full-service remodeling team for the complete list, or get a free written estimate to start.
Why choose Angel Suarez Construction?
- Fully licensed and insured for your protection.
- Upfront pricing you approve before any work starts.
- Serving San Bruno, South San Francisco, San Mateo, Burlingame, Millbrae, San Francisco and surrounding areas.
Related services
- Concrete & Foundations, Licensed concrete and foundation work on the San Francisco Peninsula: new foundations, driveways, patios, walkways, and stamped or colored concrete, poured to last.
- Roofing, Roof replacement and repair for Bay Area homes in shingle, tile, metal, and flat low-slope. Handled by a licensed general contractor, with honest cost ranges shared up front.
- Doors & Windows, Licensed door and window replacement across the San Francisco Peninsula: energy-efficient, Title 24 compliant windows plus new entry, patio, and sliding doors, installed and flashed the right way.
Explore our full range of Remodeling & Construction, or head back to the Angel Suarez Construction home page.
Cost of seismic retrofitting in San Bruno
Around $5,000 to $10,000 for a standard bolt-and-brace foundation retrofit in the Bay Area, as of 2026. Soft-story and hillside work runs higher. These are published market ranges, not our quote.
What moves the price:
- The age and foundation type of the home
- How tall the cripple walls are and how many anchor bolts are needed
- Crawl-space size and how easy it is to reach the framing
- Whether the job is simple bolt-and-brace or a larger soft-story retrofit
- Engineering plans and city permit fees
Every job is different, so we give you an exact price up front, and you approve it before any work starts.
How it works
How our seismic retrofitting process works
Get your free estimate
Call or request a quote online. We'll take a look and give you an honest, upfront price, no pressure.
We schedule your job
Pick a time that works for you. We show up when we say we will and keep you in the loop the whole way.
Done right, the first time
Clean, quality general contractor, and we leave your property better than we found it.
Get a free estimate for seismic retrofitting
Call now or request a free estimate, we'll get right back to you. Emergency service available.
Licensed & insured · No obligation
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San Bruno, CA area
FAQ
Seismic Retrofitting, common questions
Where can I find seismic retrofitting near me in San Bruno?
Angel Suarez Construction provides seismic retrofitting in San Bruno and across the nearby San Francisco Peninsula. We are a local, licensed general contractor, so we know the older raised-foundation homes and the building departments here. Call us to set up a crawl-space inspection and a clear, honest plan for your home.
Are your seismic retrofits done by a licensed contractor and built to code?
Yes. Angel Suarez Construction is a licensed California general contractor, CSLB #1085926. We install bolt-and-brace and cripple-wall retrofits to the state's building code. We build to the standard plan set used by California's Earthquake Brace + Bolt program, and we pull the city permit so a local inspector checks the finished work.
Is a seismic retrofit worth the cost for an older Bay Area home?
For most older Peninsula homes, yes. Published 2026 cost guides put a standard bolt-and-brace retrofit in the Bay Area around $5,000 to $10,000, far less than repairing a home that slides off its foundation. These are market ranges, not our quote. California's Earthquake Brace + Bolt program also offers grants of up to $3,000 that can lower your cost.
Will I need to move out of my home during the retrofit?
Usually not. Most bolt-and-brace work happens in the crawl space under your floor, so you can stay in your home during the job. Our crew works from outside access points when we can. A larger soft-story retrofit takes more time and planning, and we will tell you up front what to expect.
Does a seismic retrofit raise my home's value?
It can. A finished, permitted seismic retrofit is a real safety upgrade that many Bay Area buyers now look for. It shows the home is ready for the next quake. We give you the permit and inspection records when the work is done, so you have proof to share when you sell.
Can any older home get a seismic retrofit?
Most older wood-frame homes on a raised foundation with a crawl space can be retrofitted. Homes with tall cripple walls, an unbolted frame, or a room over a garage benefit the most. A house on a concrete slab or a steep hillside may need a different plan. We inspect first, then tell you what fits.
Need seismic retrofitting?
Call now or request a free estimate, we'll get right back to you. Emergency service available.
Licensed & insured · No obligation