Birchwood
Birchwood offers the largest residential lots in Bellingham, with deep parcels ideal for detached ADUs and multi-unit potential. Located north of downtown along the Squalicum Creek...
Sunnyland
Sunnyland is Bellingham's ADU pioneer neighborhood. More detached ADU permits have been issued here than almost anywhere else in the city. Walkable, transit-connected, and close to...
Columbia
Columbia is a family-friendly, centrally located Bellingham neighborhood with good lot variety and strong rental demand driven by proximity to WWU and downtown. Its mix of medium-s...
Cordata
Cordata is Bellingham's newest planned neighborhood, designed with transit access and urban density in mind. Newer infrastructure, proximity to Bellis Fair and the Guide Meridian c...
Silver Beach
Silver Beach is a lakefront neighborhood on the shores of Lake Whatcom. Due to its location within the Lake Whatcom Watershed, ADU construction is currently NOT allowed. Strict env...
Don't See Your Neighborhood?
We're adding new neighborhoods regularly. In the meantime, our free feasibility study can analyze any property in Bellingham or Whatcom County — including unincorporated areas, rural lots, and neighborhoods not yet listed here.
Get Your Free Feasibility StudyUnderstanding ADU Feasibility by Neighborhood
Every Lot Is Different
Even within the same neighborhood, ADU feasibility varies by lot size, zoning, setbacks, critical areas, and utility access. Our GIS-powered feasibility study checks your specific parcel against all of these factors.
State Law Meets Local Code
Washington's HB 1337 mandates ADU allowances statewide, but Bellingham's local code adds neighborhood-specific nuances. We navigate both layers for every project.
Permitting Made Simple
Most Bellingham ADUs qualify for a Type I administrative permit (4-6 weeks). Visit our permitting guide or see permitting costs for a full breakdown.
Know Your Costs
ADU construction costs vary significantly by neighborhood, lot conditions, and ADU type. Our Whatcom County ADU cost guide breaks down pricing by project type and scope.
