Steel Moment-Frame Retrofit: Los Angeles vs South San Gabriel
How do steel moment-frame retrofit rules compare between Los Angeles, CA and South San Gabriel, CA?
South San Gabriel has fewer restrictions than Los Angeles.
Los Angeles, CA
Los Angeles County
Los Angeles encourages voluntary evaluation of pre-Northridge welded steel moment-frame buildings through LADBS Information Bulletin P/BC 2017-026, applying SAC-FEMA 350 series guidance. Some commercial leases and lender covenants make inspection effectively mandatory in Class A office space.
View full Los Angeles rules →South San Gabriel, CA
Los Angeles County
LA County has no mandatory retrofit ordinance for pre-Northridge welded steel moment-frame buildings. LACoDPW follows FEMA 351-355 evaluation guidance and accepts ASCE 41-17 voluntary upgrades through Title 26 permits, with no countywide deadline.
View full South San Gabriel rules →Key Facts Comparison
| Fact | Los Angeles | South San Gabriel |
|---|---|---|
| Guidance bulletin | LADBS P/BC 2017-026 | - |
| Buildings affected | Pre-1995 welded steel moment | - |
| Standard | FEMA 350 / ASCE 41-17 | - |
| City mandate | Voluntary only | - |
| Common driver | Lender or tenant due diligence | - |
| County mandate | - | None for unincorporated areas |
| Guidance documents | - | FEMA 350-355 SAC reports |
| Evaluation standard | - | ASCE 41-17 Tier 3 |
| Common retrofit | - | Cover plates or RBS dogbones |
| Hospital rule | - | SB-1953 via OSHPD separately |
Highlighted rows indicate differences between cities.
Los Angeles FAQ
Is my office tower required to retrofit?
Not under current Los Angeles ordinances. The City Council has studied a mandate but no rule is adopted; voluntary inspection follows LADBS Information Bulletin P/BC 2017-026.
Will retrofitting raise my building's value?
Often yes. Class A tenants and CMBS lenders increasingly demand SB-1953 style seismic reports; a verified moment-frame retrofit can lower insurance premiums and support higher rents.
South San Gabriel FAQ
Which buildings are pre-Northridge WSMF?
Welded steel moment-frame buildings designed under codes before 1994 — generally permitted before 1995. Common in mid-rise commercial offices built in the 1970s and 1980s, especially in San Fernando Valley unincorporated communities.
Are tenants notified of WSMF risk?
Not by county ordinance. California Civil Code §1102.6c requires seller disclosure of seismic hazards, but no specific WSMF disclosure exists. Voluntary evaluations are sometimes triggered by lender or major-tenant due diligence.
Compare other topics
See how Los Angeles and South San Gabriel compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool