Structural Engineer
Orange County & Los Angeles
PE-stamped structural plans for homeowners and contractors across Orange County and LA County. ADUs, additions, wall removals, seismic retrofits, and commercial engineering — formatted for your specific city's plan check standards.
Structural Engineering Services
ADU & garage conversion
Garage-to-ADU conversions, detached units, attached ADUs, and JADUs. Foundation, framing, and lateral design.
LADBS SPA program for qualifying ADUs. City-specific plan check formatting across OC and LA.
Room additions & remodels
Ground-floor additions, second-story pop-ups, and multi-phase remodels. Foundation evaluation included.
Existing foundation evaluation per CBC §1809. Hillside areas may require geotechnical coordination.
Load-bearing wall removal
Beam sizing, column design, and PE-stamped plans for safe wall removal. LVL and steel beam options.
Shear panel evaluation included. Older homes may have balloon framing requiring material identification.
Inspections & PE letters
PE-stamped assessment letters for real estate, insurance, and permit compliance. Reports in 3–5 days.
Letters accepted by insurance companies, lenders, agents, and building departments across California.
Commercial & TI
Tenant improvements, seismic anchorage, equipment platforms, restaurant conversions, and code compliance.
LADBS has specific TI formatting requirements. Steel, CMU, and tilt-up evaluation for older buildings.
Seismic retrofit
Foundation bolting, cripple wall bracing, shear wall upgrades, and soft-story retrofit for multi-family.
LA Ordinance 183893 mandates soft-story retrofit for qualifying buildings. CBC Appendix A3 for residential.
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.
Scope and quote
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
PE-stamped structural drawings and calculations — seismic, wind, and gravity as required. Every set is reviewed against your city's plan check standards before submission.
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.
Every City Has Different Plan Check Standards
Plans that sail through Irvine may come back with corrections from LADBS — not because the engineering is wrong, but because the formatting doesn't match their system. Santa Ana has streamlined ADU processing. Pasadena has historic district review. Glendale has hillside development standards. Long Beach has mandatory soft-story retrofit requirements.
Affinity formats every submission to the specific standards of the receiving jurisdiction. That's how we maintain a high first-submission approval rate across 26+ cities in two counties.