Whatcom County Planning & Development Services manages permits for all unincorporated areas, while incorporated cities like Bellingham, Ferndale, and Lynden operate their own independent building departments. Development in the county is subject to critical areas ordinances, including extensive flood hazard zones, shoreline management areas, and wildfire urban interface requirements.
The county enforces strict Shoreline Management Program regulations and critical area protections that often require additional environmental review for projects near water bodies or wetlands.
How this fits with the state
The state authority here is Washington Department of Labor & Industries. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · Whatcom County Planning & Development ServicesLast verified · 05 / 2026