Primary-Residence-Only Rule
Bellingham imposes one of Washington's stricter primary-residence frameworks under BMC 20.10.037. In residential zones, the dwelling unit hosting the STR (including any accessory dwelling unit) must serve as the primary residence of the owner or long-term renter (with at least a 270-day lease) for at least 270 days per year, and each operator is limited to one STR. Whole-unit rentals are capped at 95 days per year. Detached accessory dwelling units (DADUs) are prohibited as STRs in single-family zones. In commercial and Urban Village zones (Type II and Type III-A permits), the primary-residence requirement does not apply, the per-operator cap does not apply, and non-primary investment STRs are allowed year-round. STRs are entirely prohibited in the Lake Whatcom Watershed Basin One and in shoreline areas regulated under BMC Title 22.