Why You Actually Need Structural Engineering (And When You Don't)
We've seen beautiful house plans get rejected by building departments because they lacked structural engineering. We've also seen homeowners pay for engineering they didn't need. Let us clear up the confusion.
When You Absolutely Need Stamped Structural Drawings
- Homes over 2 stories tall — Prescriptive building codes (IRC) have limits. Exceed them, and you need engineering.
- Unusual soil conditions — Expansive clay, fill soil, high water tables, or steep slopes require foundation engineering.
- High-wind or seismic zones — Coastal Florida, tornado alley, California earthquake areas. Local codes will require engineered lateral systems.
- Complex designs — Long cantilevers, large open spans, unusual roof shapes, or post-and-beam construction.
- ICF or SIP construction — These systems require engineered connections and details.
When You Might Not Need Engineering
Simple, single-story homes on flat, stable sites with standard layouts often fall within IRC prescriptive requirements. But — and this is important — always check with your local building department. Some jurisdictions require engineering for every new home, no exceptions.
What Structural Engineering Actually Includes
When you hire us to provide structural engineering for your project, you'll receive load calculations, foundation design, beam and column schedules, lateral force resistance details, and — most importantly — a Professional Engineer (PE) stamp that your building department will accept.
The Cost of Skipping It
We had a client who tried to save $1,500 by skipping structural engineering. His local building department rejected his plans three times. He eventually had to pay an engineer $3,000 to fix what should have been done from the start — plus he lost two months of construction time. Don't let that be you.