Haas Development & Const Co
1completed ADU permits
2total ADU permits
2018–2021active years on record
$81,929median est. project cost
Washington state license
- License
- HAASDDC842QA
- Status
- license active
- Type
- CONSTRUCTION CONTRACTOR
- Expires
- 2026-12-10
- Registered in
- Seattle, WA
As reported by WA L&I on 2026-08-30. Always re-verify at lni.wa.gov/verify.
Permit record
Every ADU-related permit in covered city records naming this contractor. Links go to each city's official permit portal.
| Permit | City | Issued | Status | Est. cost | Address | Description |
|---|---|---|---|---|---|---|
| 6849300-CN | 2021-08-25 | Completed | $81,929 | 2704 NE 143RD ST | Construct Detached Accessory Dwelling Unit (DADU) accessory to Single Family Residence per Standard Plan 6800948-SP | |
| 6600687-CN | 2018-02-16 | Expired | $65,000 | 3305 23RD AVE S | Replace upper floor windows and exterior siding construct interior non structural alterations to all floors and alterations to basement to convert basement of existing single family residence into accessory dwelling unit per plan |
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