ADU Builder Index

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3Blc

2completed ADU permits
2total ADU permits
2021–2021active years on record
$155,000median est. project cost

Washington state license

No exact business-name match in the WA L&I registry — this builder may hold a license under a different legal name. Check the registry directly.

Permit record

Every ADU-related permit in covered city records naming this contractor. Links go to each city's official permit portal.

PermitCityIssuedStatusEst. costAddressDescription
6777814-CN2021-02-27Completed$155,0003801 37TH AVE SConstruct additions and alterations to create an AADU in the basement of a single family residence and replace exiting deck per plan.
6781220-EXCompleted$155,0003801 37th AVE SThis project is a repair to a failing 2nd story deck in a steep slope area of the rear yard.  The posts are failing and the owners would like to repair/rebuild the deck in place.  This will involve driving pin piles and building new footings then placing the deck and columns on these new support structures.  A geotechnical report has been completed supporting these measures.  A new ADU will be pe

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