Soft-Story Retrofit

What we do

Soft-story retrofit in Los Angeles is an ordinance-driven practice. Ordinance 183893 requires the retrofit of wood-frame residential buildings with two or more stories, four or more dwelling units, and a soft or weak first story — typically a ground-floor tuck-under parking condition. For owners, it is a deadline-driven compliance program; for engineers, it is a highly specific design problem we've solved many times.

Our service starts with a screening visit to confirm that the building is actually within the ordinance's scope — occasionally the City's original classification is incorrect, and a correction can save the owner a full retrofit. For buildings that are in scope, we move quickly into design. The dominant retrofit strategy is steel special moment frames or steel ordinary concentrically braced frames at the soft-story level, anchored into new concrete grade beams tied to the existing foundation. We detail for the condition we actually expect to find in the field — and we verify those conditions before the drawings are finalized.

We handle the full LADBS submittal sequence: the initial compliance response, the engineering report, the permit drawings, plan-check correction responses, and — after construction — the field observation visits and final documentation the Department requires to close out the order. Owners tell us the value of this service is that they hand us a notice and we hand them back a closed file.

Typical scope

• Ordinance-scope verification and initial LADBS compliance response
• Structural screening and engineering evaluation of the soft-story condition
• Design of steel moment frame or braced frame retrofit at the ground floor
• New grade beams, footings, and tie-ins to the existing foundation
• Coordination with the existing wood-frame upper structure
• Permit drawings, calculation package, and plan-check correction responses
• Construction administration — site visits, RFIs, and field adjustments
• Final inspection, stamped documentation, and LADBS sign-off

When to engage us

The moment you receive a soft-story compliance notice — or earlier, if you're acquiring a building that may be in scope. Deadlines under Ordinance 183893 are firm and the penalty for non-compliance is significant.