Home inspection reports flag something structural on a huge share of inspections: a crack, a sag, a bowing wall. The question that follows — "who do I actually call?" — trips up a lot of owners, because the two professions sound similar and are not.
Two different jobs
A home inspector performs a visual, non-invasive walkthrough of an existing home against a standard of practice and reports on its condition. Inspector licensing and certification requirements vary by state (GENERAL GUIDANCE). An inspector's report is informational — it is not a design document, not a load analysis, and not something a building department will accept as engineering.
A structural engineer — a Professional Engineer (P.E.) licensed in structural engineering — is legally authorized to analyze structures, perform calculations, and seal engineering documents. That seal carries professional responsibility (VERIFIED FACT — licensure is state law).
What each one actually delivers
- Method — a home inspector works visually and non-invasively; a structural engineer works by analysis, calculations, measurement, and design.
- Output — an inspector delivers a condition report with flags; an engineer delivers engineering findings, stamped documents, and repair or design solutions.
- Authority — an inspector cannot certify structural safety; an engineer can certify safety and seal plans for permits.
- Typical use — inspection for pre-purchase or pre-listing; engineering to diagnose a problem, design a fix, or permit a project.
Who you actually need — by scenario
- Buying a home and want an overall read → home inspector.
- Inspection flagged a crack, sag, or movement → structural engineer. Inspecters identify and flag conditions; an engineer determines whether they're structurally significant and why (GENERAL GUIDANCE).
- Removing or opening a wall, adding an ADU, converting a garage → structural engineer. These change load paths and usually require stamped documents for permits.
- Submitting a permit application involving structural work → structural engineer.
- Insurance or legal dispute over structural damage → structural engineer.
In practice the two professions hand off: the inspector finds it, the engineer explains and fixes it.
What each costs
Home inspections commonly run roughly $300–$600 for a typical single-family home. Structural engineer evaluations vary widely with scope and region — often a few hundred dollars for a targeted evaluation, more for designs and stamped documents (ESTIMATE — regional variation is large).
The QuiPlans angle
QuiPlans was built around the engineer side of that handoff. A $349 Engineer Review is a property-specific structural and feasibility assessment by a licensed P.E., fully credited toward a qualifying Complete Permit Package if you continue — so the diagnosis isn't a dead cost on the path to building (VERIFIED FACT — QuiPlans pricing policy).
The bottom line
An inspector tells you what they saw. An engineer tells you whether it matters, why it happened, what to do about it, and can put a professional seal behind the answer. For anything that changes structure — or anything an inspection flagged as structural — the engineer is who you actually need.
