Haas Development & Const Co
ADU builder in Bellevue & Seattle, WA · Licensed
1completed ADU permits
3total ADU permits
2018–2025years active on record
$81,929median est. project cost
Washington state license
- License
- HAASDDC842QA
- Status
- Licensed
- Type
- CONSTRUCTION CONTRACTOR
- Expires
- 2028-12-10
- Registered in
- Seattle, WA
As reported by WA L&I on 2026-10-13. 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 |
|---|---|---|---|---|---|---|
| 24 129550 BR | Bellevue | 2025-09-03 | Issued | — | 1505 143rd Ave NE | BODELL COTTAGE — NEW BACKYARD COTTAGE - 393GSF. Includes clearing & grading. Does not include mechanical, electrical or plumbing. Guest Cottage Agreement Recording Number: 20250408000222 |
| 6849300-CN | Seattle | 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 | Seattle | 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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