Build Your ADU in Whatcom County. Done-For-You, Permit to Keys.
Free Feasibility Study
We'll analyze your lot using Whatcom County GIS data and 2025 land use rules — delivered to your inbox in 48 hours.
3 Simple Steps to Your ADU
Free Feasibility Study
Whatcom GIS Analysis. Is your lot eligible?
Full Permit Package
Land use + building permits. We handle everything.
Letter of Intent + Build
Architect, permits, builder — all in one.
FREE FEASIBILITY STUDY · FREE PERMITS WHEN WE BUILD
Questions? Call (360) 594-0120 — Mon–Fri 8am–5pm
ADU Guides & Resources
Everything you need to know before building an ADU in Bellingham and Whatcom County.
ADU Cost Breakdown
How much does an ADU cost in Whatcom County? Complete 2026 pricing by type.
EssentialADU Laws & Regulations
Bellingham and Whatcom County ADU rules, setbacks, and size limits.
Start HereCan I Build an ADU?
Quick eligibility checklist based on your lot, zoning, and property type.
FinanceADU Financing Options
HELOCs, construction loans, and ADU-specific financing for WA homeowners.
PlanningConstruction Timeline
Month-by-month breakdown from design to move-in for Whatcom County projects.
InvestmentIs an ADU Worth It?
ROI analysis, rental income projections, and property value impact.
2025 Whatcom County ADU Laws
Everything you need to know about the new regulations and opportunities.
2025 Washington State ADU Law Changes (HB 1337)
Major statewide deregulation for easier building.
- Right to Build: All Washington cities/counties must allow ADUs by right.
- No Owner Occupancy: Owner-occupancy requirements eliminated statewide. You can rent both units.
- Reduced Setbacks: Setbacks reduced to 5ft in many cases to fit more lots.
- Impact Fees: Limitations on impact fees for ADUs under 1,000 sqft.
Meet Your Team
You don't get handed off. You get a team.
Loren
Permitting Specialist
"Loren lives inside Whatcom County permit systems. He manages every submission, follows up with county staff, and keeps your project moving through the approval pipeline without delays."
Carlos
Builder & Architect Liaison
"Carlos coordinates your architectural drawings, structural engineering, and build execution. One point of contact from design through final inspection."
