Blower Door Testing in Auburn, WA
King County and Pierce County sides of Auburn
Auburn straddles King and Pierce Counties, so permit reviewers may ask for blower door numbers on both new homes and major alterations. We test for builders, owner-builders, and HVAC contractors who need a third-party ACH50 result. From Sumner we’re usually inside the free 20-mile zone for most Auburn addresses; farther jobs are $1.75/mi.
Auburn is one of the few cities in our area that sits in two counties. Most of the city is in King County, while Lakeland Hills and the southern neighborhoods extend into Pierce County. City of Auburn permits cover both sides, but builders and homeowners often get mixed up about which county applies when they look at tax records or utilities. For blower door testing, what matters is the permit: we test to the Washington State Energy Code requirement on your plans and provide written results for your builder and the City of Auburn inspector.
Where we test in Auburn
Lea Hill
Newer single-family neighborhoods and infill lots on the plateau.
Lakeland Hills
Hillside subdivisions on the Pierce County side, close to our Sumner office. See our Pierce County testing page.
The valley and downtown
Older homes with additions, plus new ADUs and infill. We also test nearby in Pacific, Algona, Kent, and Federal Way. See the full list on our homepage.