Architecture · Structural · MEP
One firm. Complete plan sets.
No coordination gap.
Most homeowners and GCs hire three separate consultants — an architect, a structural engineer, and an MEP engineer — and end up managing the coordination themselves. Affinity Design Group delivers a complete, coordinated plan set under one PE's oversight. One engagement. One point of contact. One set of drawings that actually align.

The coordination gap nobody warns you about
Most people building in California discover mid-project that they need more than structural engineering. They need architectural drawings. They need MEP — mechanical, electrical, plumbing. And they need all three disciplines to coordinate with each other before the city will approve a permit.
When you hire three separate firms, you inherit the coordination. The architect designs the layout. The structural engineer designs the load paths. The MEP consultant handles systems. But when the drawings from different firms don't align — and they often don't — the plan check correction comes back and nobody takes responsibility.
You're not a project manager. You shouldn't have to be.
Architecture, structural, and MEP — coordinated under one roof
Affinity Design Group handles all three disciplines in a single engagement. Daniel De Witte, P.E. #82726, provides PE oversight across the entire plan set — architecture, structural calculations, and MEP engineering — so every drawing coordinates before it's submitted.
What this eliminates:
No separate billing relationships with three firms
No coordination gaps between disciplines
No finger-pointing when drawings don't align
No discovering you need MEP after you've already paid for structural
No GC managing your consultants for you
What a complete plan set includes:
Architectural drawings — floor plans, elevations, sections, site plans
Structural engineering — calculations (seismic, wind, gravity), foundation design, framing plans, lateral system design, PE stamp
MEP engineering — mechanical (HVAC), electrical, and plumbing system design
Title 24 energy calculations
All disciplines reviewed for coordination before plan check submission
Plan check correction support included
Who we work with
Built for homeowners, GCs, and developers who want one firm — not three
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
ou reach out. Within 24 hours you have a scoped brief covering every discipline your project requires, a firm quote, and a single point of contact. No ambiguity about what's included.
Coordinated plan set
Architecture, structural, and MEP are designed as an integrated package. All disciplines are reviewed for alignment before submission. Plans are checked against your city's plan check standards. PE stamp on delivery.
Construction support
When your permit is approved and construction begins, your PE stays directly available. RFIs, field questions, inspector issues — same business day.
Frequently Asked Questions
Do I really need all three disciplines?
Most residential projects in California require architectural drawings, structural engineering, and MEP (at minimum Title 24 energy calculations). The city won't issue a permit without a complete set. Affinity tells you exactly what your project needs on the first call.
Can Affinity work alongside my existing architect?
Yes. If you already have an architect, Affinity can come in as structural and MEP, or provide full coordination support. We work alongside architects regularly.
What's the advantage over hiring each firm separately?
Coordination. When one firm handles all disciplines, the drawings align before submission. That means fewer plan check corrections, faster permit timelines, and one point of contact instead of three.
How is Affinity different from a design-build firm?
We handle the design and engineering — architecture, structural, and MEP — but we don't build. Your GC handles construction. We stay available throughout the build for RFIs and support.
