Structural Engineer in Whittier, CA
Structural Engineering · Whittier
Daniel De Witte, P.E. #82726, delivers PE-stamped structural plans for Whittier homeowners and contractors. ADUs, additions, wall removals, and inspections with direct PE access.
Structural Engineering Services in Whittier, CA
Whittier's established neighborhoods offer strong ADU and addition potential on larger lots. Many homes built in the 1950s-70s are prime candidates for garage conversions, room additions, and structural upgrades. Affinity Design Group provides PE-stamped drawings tailored to Whittier's building department and LA County standards. Every project gets jurisdiction-specific plan check review before submission. For Whittier projects requiring more than structural, Affinity provides complete coordinated plan sets covering architecture, structural engineering, and MEP under one PE's oversight.
ADU & garage conversion
PE-stamped plans for Whittier ADU projects and garage conversions on established lots. From $1,200.
Whittier is an incorporated city with its own building department, not under LA County jurisdiction. Many homes are 1950s–1970s wood-frame with raised foundations — cripple wall evaluation is often part of addition scope.
Room additions & remodels
Structural engineering for Whittier additions and home expansions. From $2,500.
Many 1950s–1970s Whittier homes have raised foundations with cripple walls. Addition load paths must account for existing lateral deficiencies.
Load-bearing wall removal
Beam sizing and PE-stamped plans for open-concept remodels in 1950s–1970s Whittier homes. From $1,200.
Whittier ranch homes often have central bearing walls doubling as shear panels. Removal scope includes both gravity and lateral redesign.
Inspections & PE letters
PE-stamped structural letters for Whittier real estate and insurance. From $400.
Whittier inspection letters commonly address settlement cracks in older foundations and cripple wall adequacy. PE assessment includes recommendations.
Commercial & TI
Structural engineering for Whittier commercial tenant improvements and retail modifications.
Uptown Whittier has active commercial renovation. Older masonry buildings may require seismic evaluation before TI permits.
Seismic retrofit
Foundation bolting and cripple wall bracing for Whittier's 1950s–1970s housing stock. From $2,500.
Whittier's raised-foundation homes are common retrofit candidates. The 1987 Whittier Narrows earthquake highlighted seismic vulnerability in this area.
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.