Washington
Construction Defect Investigation
Independent investigation of defective construction: foundations, framing, drainage, concrete and site work.
What the work involves
When a new home, building or site improvement performs poorly, an engineer investigates whether design or construction departed from plans, codes and industry standards. Work includes document review, inspection, measurements, destructive testing where needed, and a report on causes and repair costs. Reports support warranty claims, negotiations, and litigation, and many states have right-to-repair statutes that set notice steps before suit.
Local conditions we plan for
- Cascadia Subduction Zone and Seattle Fault seismic hazard
- Landslides on wet slopes
- Liquefiable soils near Puget Sound
- Wildfire east of the Cascades
Building code: 2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026).
When you need it
- Cracking, settlement or water problems in new construction
- Builder disputes the cause of a problem
- HOA transition study before taking control from a developer
- Warranty claim deadline approaching
Frequently asked questions
How much does construction Defect Investigation cost?
Across the US, construction Defect Investigation usually costs $1,500 to $25,000. Estimate. Single-home investigations are at the low end; multi-building HOA claims cost more. Hourly rates for experts follow SEAK survey ranges.
How long does construction Defect Investigation take?
Plan on 2 to 12 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Is a permit required for construction Defect Investigation?
Often not on its own, but the findings frequently lead to work that does need a permit. We tell you which parts of the follow-up work your local building department will review, and can prepare those drawings too.
How do I verify an engineer's license in Washington?
Engineers practicing in Washington are licensed by the Washington State Board of Registration for Professional Engineers and Land Surveyors. You can confirm a license number and its status in the board's public license search before you sign a contract.
Which building code applies in Washington?
2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026). Cities and counties can add local amendments, which is one reason to hire an engineer who works in your area.
What site problems do engineers see most in Washington?
Common issues include cascadia Subduction Zone and Seattle Fault seismic hazard, landslides on wet slopes, liquefiable soils near Puget Sound and wildfire east of the Cascades.