Los Angeles, CA · Seismic Retrofit

Seismic Retrofit Engineering in Los Angeles

Los Angeles seismic retrofit engineering serves the city's mandatory soft-story and non-ductile concrete retrofit programs — structural evaluation, retrofit design, and permit packages for LADBS's compliance deadlines.

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What We Engineer

Soft-story retrofit engineering under LA Ordinance 183893
Non-ductile concrete building retrofit engineering
Structural evaluation for LA mandatory retrofit ordinances
Retrofit scheme development — steel moment frames, shear walls, added walls
LADBS retrofit permit package preparation
Compliance timeline analysis and phased retrofit planning
Existing structural drawings research and field verification
Post-earthquake damage assessment

Verified Local Sources

Reviewed 2026-09-11. Code editions and local requirements can change; confirm the current requirements with the authority having jurisdiction before design.

Permit authority Adopted codes Adopted codes Adopted codes Adopted codes Local amendments Utilities Utilities Climate Market context

Local Engineering Context

Authority Having Jurisdiction: Los Angeles Department of Building and Safety (LADBS)
Building Code: 2022 CBC; LA Ordinance 183893 (soft-story) and Ordinance 184081 (non-ductile concrete)
Energy Code: N/A
Local Market: LADBS has mandatory retrofit ordinances for soft-story wood-frame buildings and non-ductile concrete buildings — thousands of buildings in LA are subject to compliance deadlines, creating significant retrofit engineering demand.
Climate & Engineering Conditions: High seismic hazard — SDC D to F; site-specific seismic hazard assessment is standard on retrofit projects; liquefaction and slope-stability must be evaluated for vulnerable sites.

About Apex Grid Engineering

Apex Grid Engineering is a multi-discipline engineering firm with multi-state PE coverage confirmed per project and a business-provided operating and contact address in Queen Creek, Arizona. We provide structural, MEP, civil, and geotechnical engineering for commercial, industrial, multifamily, and government clients — with 15+ years of experience and a multi-discipline engineering team on staff.

We work from architectural PDFs, CAD files, or field measurements, and we're set up to turn projects around on compressed schedules when the situation calls for it.

Related services in Los Angeles: Structural Engineering

Los Angeles Seismic Retrofit Engineering Questions

What does Seismic Retrofit Engineering in Los Angeles include?

Who reviews Los Angeles engineering permit documents?

Los Angeles Department of Building and Safety (LADBS) is the listed authority having jurisdiction for this service area. The exact reviewer and submittal path should be confirmed for the project address before design begins.

Which building and energy codes apply in Los Angeles?

The listed building-code basis is 2022 CBC; LA Ordinance 183893 (soft-story) and Ordinance 184081 (non-ductile concrete), and the listed energy-code basis is N/A. Project-specific amendments and effective dates should be verified with the permitting authority.

Ready to Start in Los Angeles?

Send us your drawings or describe your project and we'll respond within one business day.

Get a Proposal 480-490-0064