If you own — or are underwriting — an older commercial building in Downtown Los Angeles, seismic retrofit law is not background noise. It is a compliance clock that is already running, with the next major deadlines landing in 2027–2028. Here is where the law stands as of mid-2026, in plain English.
The law: Ordinance 183893
Los Angeles adopted Ordinance 183893 in 2015, creating two mandatory retrofit programs: one for pre-1978 wood-frame soft-story buildings (mostly apartment buildings over tuck-under parking) and one for non-ductile concrete buildings — the program that matters most for Downtown commercial stock. Non-compliance is a misdemeanor under the Municipal Code.
Non-ductile concrete: who is covered
The concrete program applies to buildings whose permit application was submitted before January 13, 1977 (and buildings with no locatable permit), excluding single-family homes and detached duplexes. The city has identified roughly 1,500 buildings in scope. These pre-1977 concrete frames are brittle — they performed poorly in Northridge, Mexico City and Christchurch — and the ordinance exists because they are the building type most likely to kill people in the next major earthquake.
The clock: 3 / 10 / 25 years
Deadlines run from the date the owner is served an Order to Comply — and the city served most orders during 2017 and January 2018. From that date: within 3 years, submit the completed structural checklist; within 10 years, submit a full structural evaluation plus either proof of a prior conforming retrofit, retrofit plans, or demolition plans; within 25 years, complete construction and obtain a Certificate of Compliance.
Do the arithmetic on a 2017 order: the 10-year plans deadline arrives in 2027, and full completion is due by 2042. That is why 2026 is the year serious owners are engaging structural engineers — the engineering, plan-check and contractor pipeline is about to get crowded.
What Downtown owners should know
First, the Fashion, Flower and Garment Districts carry a high concentration of pre-1977 masonry and concrete stock — but much of the unreinforced masonry was already strengthened decades ago under the city's original URM program (Division 88, dating to the 1980s), so a building's actual status turns on its specific permit history. Second, buildings substantially rebuilt under modern code sit outside the problem entirely — K2's listing at 1048 S Los Angeles Street, fully rebuilt in 2009, is an example of why rebuild vintage matters in underwriting. Third, retrofit exposure is a price term: in any acquisition of pre-1977 concrete, the retrofit scope, cost and remaining timeline belong in the negotiation alongside the rent roll.
The direction of travel
The mandates are expanding, not shrinking. In April 2025, Los Angeles County introduced an ordinance to require seismic retrofits of high-rise concrete buildings in unincorporated areas — a signal of where regional policy is heading. Owners betting that deadlines will be quietly forgotten are betting against a decade of consistent policy movement in the opposite direction.
Frequently asked
Which commercial buildings in Los Angeles must be seismically retrofitted?
Under Ordinance 183893, non-ductile concrete buildings with permit applications submitted before January 13, 1977 (about 1,500 buildings citywide), plus pre-1978 wood-frame soft-story buildings. Single-family homes and detached duplexes are excluded.
What are the deadlines for the non-ductile concrete retrofit program?
From the Order to Comply — mostly served in 2017–January 2018 — owners have 3 years to submit the structural checklist, 10 years to submit a full evaluation with retrofit or demolition plans, and 25 years to complete construction. For 2017 orders, the plans deadline is 2027 and completion is due by 2042.
What happens if an owner ignores the retrofit order?
Non-compliance is a misdemeanor under the Los Angeles Municipal Code and can result in prosecution and administrative enforcement.
Do retrofitted or rebuilt buildings have to comply again?
A building previously retrofitted in conformity with the applicable chapters of the LA Building Code can submit proof of that work, and buildings substantially rebuilt under modern code — like K2's 2009-rebuilt listing at 1048 S Los Angeles Street — fall outside the pre-1977 concrete problem.
How should retrofit exposure affect a purchase price?
As a hard cost with a deadline. In any acquisition of pre-1977 concrete, the retrofit scope, engineering cost and remaining compliance timeline should be priced into the offer the same way deferred maintenance is.
This page is general information, not legal, tax or engineering advice. Confirm current requirements with the City of Los Angeles, LA County and your own counsel, CPA and structural engineer before acting.
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