No Washington statute stops you pruning a tree on your own Whatcom lot, and there is no general county trimming permit. The City of Bellingham manages street trees and protects trees near creeks and in the Lake Whatcom watershed.
Western Washington carries heavy tree canopy, but routine pruning of a tree on your own established lot needs no permit in the county or in Bellingham, and the common-law rule lets you cut a neighbor's overhanging branches back to the property line at your own cost. The limits sit in the public realm and sensitive areas: Bellingham manages street trees in the planting strip under BMC Chapter 13.40, and trees within critical areas, along salmon-bearing streams, or inside the Lake Whatcom Reservoir watershed face added protection under critical areas and land-clearing rules. Utilities handle their own line-clearance pruning.
None from the county or city for pruning your own trees. Damaging a city street tree or clearing in a protected critical area or the Lake Whatcom watershed draws a correction notice and possible restoration.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Whatcom County's tree trimming rules stack up against other locations.
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