ADU Builder Index

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Chris Louis Castello

0completed ADU permits
1total ADU permits
2026–2026active years on record
$382,338median 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
7065498-CN2026-04-13Issued$382,3382603 W BARRETT STAllow new attached accessory dwelling unit to existing single family use per land use code. Construct addition and substantial alterations for a two family dwelling per plan.

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