Structural Engineer in Los Angeles, CA
Structural Engineering · Los Angeles
Daniel De Witte, P.E. #82726, provides PE-stamped structural plans for Los Angeles homeowners and contractors. ADUs, garage conversions, room additions, load-bearing wall removals, seismic retrofits, and structural inspections with direct PE access.
Structural Engineering Services in Los Angeles
Los Angeles has the largest ADU market in California. From craftsman bungalows in Silver Lake to mid-century homes in the Valley, structural engineering requirements vary by neighborhood, building age, and LA Department of Building and Safety standards. Affinity Design Group serves LA homeowners and contractors with PE-stamped structural drawings designed for first-round plan check approval. Daniel reviews every set against LADBS-specific requirements before submission. Beyond structural engineering, Affinity delivers complete plan sets with architecture, structural, and MEP coordinated under one PE — so LA homeowners and GCs don't need to hire and manage separate firms.
ADU & garage conversion
PE-stamped plans for LA ADU projects. Largest ADU market in California. LADBS plan check expertise. From $1,200.
LADBS has specific plan check formatting requirements distinct from OC cities, including the Standard Plan Approval (SPA) program for qualifying ADUs. We format every LA submission to LADBS standards. The city also has a mandatory soft-story retrofit program (Ordinance 183893) for qualifying wood-frame multi-family buildings.
Room additions & remodels
Structural engineering for LA additions from craftsman bungalows to modern builds. From $2,500.
LADBS has distinct plan check formatting requirements. Additions in hillside areas (Silver Lake, Echo Park) may require geology reports per LAMC §91.7016.
Load-bearing wall removal
Beam and column sizing for safe wall removal in LA homes. PE-stamped plans for open-concept remodels. From $1,200.
LA's older craftsman and bungalow homes may have balloon framing or non-standard materials. Material identification and existing condition assessment precede beam design.
Inspections & PE letters
PE-stamped inspection letters for LA real estate, insurance, and LADBS compliance. From $400.
LADBS inspection letters must follow specific city requirements. Soft-story buildings may trigger mandatory retrofit compliance per Ordinance 183893.
Commercial & TI
Structural engineering for LA commercial TI, restaurant conversions, mixed-use projects, and industrial modifications.
LADBS commercial TI has specific formatting and submission requirements distinct from OC cities. Seismic evaluation per ASCE 41 may be triggered for older buildings.
Seismic retrofit
Foundation bolting, cripple walls, and mandatory soft-story retrofit for LA residential and multi-family buildings. From $2,500.
LA's mandatory soft-story retrofit program (Ordinance 183893) requires qualifying wood-frame multi-family buildings to be retrofitted. Pre-1940s homes are highest priority for voluntary residential retrofit.
Complete Plan Sets
Architecture, structural engineering, and MEP coordinated under one PE's oversight. One engagement, one set of drawings, one point of contact. No separate consultants to manage.
Architectural design — floor plans, elevations, sections, PE-stamped structural calculations and drawings, MEP engineering — mechanical, electrical, plumbing, All disciplines coordinated before submission, Plan check corrections + construction support
Three phases. Full PE oversight. Zero surprises.
From the first call to the final inspection, every project is led by a licensed PE with direct access throughout.
Clarity Before You Build
Submit the form. Tell us the project type, address, and timeline. You'll have a written scope and firm fee within 24 hours.
Engineered for Approval
Supported Through the Build
Direct PE access during construction. RFIs, field questions, inspector issues — same business day. The engineer who designed your project is the same one your GC can call.