Structural Engineering Services in Santa Ana
Santa Ana has one of the highest ADU adoption rates in Orange County. Affinity Design Group provides PE-stamped structural drawings designed for Santa Ana's building department standards with same-day response on every project. Beyond structural engineering, Affinity delivers complete plan sets with architecture, structural, and MEP coordinated under one PE — so Santa Ana homeowners and GCs don't need to hire and manage separate firms.
ADU & garage conversion
PE-stamped plans for Santa Ana ADU projects. High ADU adoption rate — we know the city's plan check standards. From $1,200.
Santa Ana has streamlined ADU plan check with high permit volume. The city follows standard CBC requirements and accepts standard ADU plan formats.
Room additions & remodels
Structural engineering for additions and remodels across Santa Ana's residential neighborhoods. From $2,500.
Santa Ana's compact lot sizes mean additions often push setback limits. Structural design must coordinate with zoning constraints on lot coverage.
Load-bearing wall removal
Beam sizing and PE-stamped plans for Santa Ana wall removal projects. From $1,200.
Older Santa Ana homes may have unreinforced masonry or adobe elements — wall removal requires material identification before beam design.
Inspections & PE letters
PE-stamped inspection letters for Santa Ana real estate and permit compliance. Reports in 3–5 days. From $400.
Santa Ana inspection letters commonly address older multi-family buildings for insurance renewals. Seismic adequacy evaluation is a frequent scope item.
Commercial & TI
Structural engineering for Santa Ana commercial TI, restaurant conversions, and seismic anchorage.
Santa Ana's commercial districts have high TI turnover. Older buildings may require seismic adequacy evaluation before city approves TI permits.
Seismic retrofit
Foundation bolting, cripple wall bracing, and soft-story retrofit for Santa Ana residential and multi-family. From $2,500.
Santa Ana has a significant stock of pre-1970s multi-family buildings that may be candidates for voluntary or future mandatory soft-story retrofit programs.
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.