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Desk 02 · Los Angeles · Seismic retrofit

Los Angeles Seismic Retrofit Contractor. the work you do before the next quake.

LA's seismic retrofit ordinances (most notably the city's mandatory soft-story program) put thousands of single-family and multifamily buildings under deadline. We design and install seismic retrofits across LA County: cripple-wall bracing, foundation bolting, soft-story moment frames and steel cantilever columns, and shear wall upgrades.

Licensed California contractor · CSLB #1156772 · Los Angeles desk · LADBS

Begin a Los Angeles seismic retrofit brief →← Back to Los Angeles desk

About Seismic Retrofit in Los Angeles

We work with structural engineers who specialize in LA's retrofit code path — and we coordinate with tenants and property managers when the work is on an occupied multifamily building.

Los Angeles permit notes · Seismic Retrofit

What we resolve before drawings begin.

  • 01

    LADBS retrofit pathway

    LA has defined retrofit code paths (e.g. Plan Sets A–E for soft-story). We work within these to keep permits and inspections clean.

  • 02

    Cripple-wall + foundation bolting

    For older single-family bungalows, we bolt the mudsill to the foundation and brace the cripple walls with structural plywood. This is the highest-ROI seismic upgrade you can make.

  • 03

    Tenant coordination on multifamily

    Soft-story work on apartments requires phased construction so tenants stay in place. We project-manage notice, parking, and access.

Seismic retrofit · the only remodel that pays back in earthquakes · Los Angeles spec

Brace + Bolt eligibility resets every year. A $7k retrofit qualifies for a $3k state grant and a 20%+ earthquake-insurance discount through CEA — the math is unambiguous.

  • California's Earthquake Brace + Bolt program offers $3,000 grants for qualifying pre-1980 single-family homes with crawl spaces.
  • CEA (California Earthquake Authority) insurance discounts of 20–25% apply once the retrofit is documented per FEMA P-50 / CEBC Appendix A3.

The manufacturers we actually specify.

  • Simpson Strong-Tie

    premium

    Pleasanton, CA

    Retrofit hardware: foundation plates, URFP cripple-wall panels, A35 framing angles

    Simpson's Strong Wall and URFP retrofit panels are the only ICC-ESR certified system most LA inspectors accept without redlines.

  • Hilti

    premium

    Liechtenstein

    Adhesive anchors (HIT-HY 200) for foundation bolt installations

    Required for new bolts into existing concrete — proof-loaded per FEMA P-50.

Material tiers · what you're actually choosing between.

MaterialLifespanInstalled in CABest forTrade-offs
Foundation bolting (5/8" all-thread or Titen HD)Permanent$3,500–$8,000 typicalPre-1980 homes with continuous concrete foundations.Requires crawl-space access; not feasible on slab homes.
Cripple-wall bracing (plywood shear panels)Permanent$5,500–$14,000Pre-1980 homes with > 4 ft cripple walls below first floor.Adds bracing nails through existing wiring — we map before we nail.
Soft-story retrofit (multifamily)Permanent$60,000–$250,000 per buildingMultifamily wood-frame buildings over open parking — required by LA Ordinance 183893.Tenant noticing and engineering schedule drive timeline more than construction.

Specification gotchas we resolve before contract.

  1. 01

    Brace + Bolt eligibility window.

    Brace + Bolt registration opens annually (typically Jan-Feb). Miss the window and you wait a year — we calendar this for clients.

  2. 02

    FEMA P-50 vs. P-1100 documentation.

    Grant + insurance discount require specific compliance documentation. We file the right form for the right program.

  3. 03

    Soft-story is a different program.

    If you own a multifamily over carports, your retrofit follows LA Ordinance 183893 — not Brace + Bolt. Different engineering, different timeline.

Sources · Earthquake Brace + Bolt program · LA Soft-Story Retrofit Ordinance · FEMA P-50 standard

Other Los Angeles services.

All Los Angeles services →

Los Angeles city directory · 314 cities served

Seismic Retrofit, written for your city.

Each link opens a dedicated page calibrated to the city's permit authority, lot conditions, and price band — not a generic regional landing.

Los Angeles · Seismic Retrofit FAQ

Questions Los Angeles homeowners ask first.

Start an LA seismic retrofit brief. We'll review LADBS notice (if any), engineer the upgrade, and write a fixed-scope contract.

  1. Does my LA building need a soft-story retrofit?
    If LADBS sent you a notice, yes. Generally: pre-1978 wood-frame multifamily with parking or commercial space on the ground floor. We can review your specific address.
  2. What does a soft-story retrofit cost?
    Most LA soft-story retrofits land $80K–$250K depending on building size, frame configuration, and finish restoration.
  3. What about single-family cripple wall + bolting?
    Typical single-family cripple-wall retrofit + foundation bolting runs $5K–$15K. CEA grants are often available.
  4. How long does an LA soft-story retrofit take?
    Most multifamily soft-story projects run 8–16 weeks on site after permit. Single-family cripple-wall + bolting is typically 1–2 weeks.
  5. Can tenants stay during a soft-story retrofit?
    Yes — we phase the work so tenants remain in place. Most retrofit work is at the parking level or perimeter cripple walls, not inside occupied units.
Begin

Begin your projectin twenty minutes.

A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.

Get started→or call +1 (510) 405-5921
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  • License & insurance on request
§ Los Angeles · Seismic Retrofit

Seismic Retrofit in Los Angeles. Tell us the parcel.

Seismic Retrofit runs differently in every Los Angeles jurisdiction. Send your address and we'll come back with the city-specific path, the realistic timeline, and an honest all-in.

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