Whatcom County caps building height by zoning district. The Rural Residential district limits structures to 35 feet under WCC 20.32.400. Land near Bellingham International Airport carries added height limits under WCC 20.80.675. Cities set their own caps.
In unincorporated Whatcom County, maximum height is written into each Title 20 district chapter rather than a single countywide number. The Rural Residential (RR) district holds structures to 35 feet under WCC 20.32.400, the most common residential ceiling across the rural county. Parcels within the airport approach and transition zones around Bellingham International Airport face additional height restrictions under WCC 20.80.675 tied to FAA airspace surfaces. Tall structures anywhere may also trigger FAA Form 7460 notice. Chimneys and similar projections get limited allowances. Exceeding a district limit requires a variance. Inside Bellingham, Lynden, and Ferndale, the city Municipal Code fixes height instead.
Planning and Development Services enforces height through the building permit. Over-height work draws a stop-work order, and legalizing it requires a variance from the hearing examiner, not a county waiver.
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See how Whatcom County's structure height limits rules stack up against other locations.
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