Seismic retrofit contractors — CA, WA & OR
California isn’t the only earthquake state that retrofits — the whole Pacific coast does. Foundation bolting typically runs $5,000–$15,000, with California’s EBB program rebating up to $7,000 for eligible soft-story and cripple-wall homes. Cities including Los Angeles, San Francisco and Berkeley mandate retrofits for certain buildings. Below are licensed contractors by state — this list is editorial and unpaid. Always confirm a contractor’s state license and, for soft-story work, that an engineer stamps the plans.
California
- Retrofit1 Statewide CA
20+ years, 1,000+ soft-story retrofits; California-licensed GC.
- Bay Cities Construction (Retrofit Pros) Los Angeles & South Bay
15+ years; LA, Santa Monica, Beverly Hills, Pasadena soft-story & bolting.
- Alpha Structural Los Angeles
Soft-story retrofitting and foundation/structural repair.
- Seismic Retrofitters San Francisco
SF Mandatory Soft-Story Ordinance consultation and construction.
- NP Line Design Los Angeles
Soft-story, foundation bolting and EBB-rebate retrofits.
Washington
- Seattle Seismic WA & OR (commercial)
Owned/operated by a licensed Professional Engineer; tilt-up, URM and soft-story commercial.
- Sound Seismic Seattle
Since 1999; residential earthquake retrofit, permits and insurance guidance.
- Evergreen Seismic Seattle
Residential seismic retrofitting specialist.
Oregon
- Foundations First NW Portland metro
40+ combined years; foundation bolting to crawl-space reinforcement.
- Secure Seismic Oregon
Residential retrofit with an engineer on staff and structural-engineer partners.
- John’s Waterproofing Greater Portland
Seismic retrofit solutions with free estimates.
Oregon / PNW
- Go Terra Firma Pacific Northwest
Home earthquake retrofitting across the PNW.
General information, not engineering or construction advice, and not a referral or endorsement. Inclusion is editorial and unpaid. Licensing, coverage and pricing vary and change — verify the license with your state board (CA: CSLB; WA: L&I; OR: CCB) and get a stamped engineering plan for soft-story work. Disclaimer. Updated 2026-08-06.