ADU Builder Index

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Diamond Build Corporation

1completed ADU permits
1total ADU permits
2024–2024active years on record
$196,649median 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
6978652-CN2024-06-01Completed$196,64912318 5TH AVE NEAllow new detached accessory dwelling unit to existing single-family use per land use code. Construct new one family dwelling per plan.

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