3 county-level rules, plus city-specific rules for 1 city in Snohomish County, Washington.
Verified from official government sources
In unincorporated Snohomish County, setbacks are set by zone in the SCC 30.23 bulk matrices. In the common urban R-7,200, R-8,400, and R-9,600 residential zones, the minimum side and rear setback is five feet, with larger street and front setbacks fixed per zone.
SCC 30.23.010(5)
For design reasons, the director may reduce the property line setbacks established in SCC Tables 30.23.030 and 30.23.032 by up to 25 percent for walls or structures that are 20 feet in length or less; provided, that a minimum setback of three feet is maintained.
Snohomish County caps building height by zone in the SCC 30.23 bulk matrices. Common urban residential zones allow about 30 to 35 feet; height is measured from average final grade to the roof, with specific exemptions for chimneys, spires, towers, and similar features.
SCC 30.23.050(3)
Building height shall be measured as the vertical distance from the average final grade to the highest point of the roof surface, based on the following roof types...
Snohomish County limits how much of a lot buildings may cover, set by zone in the SCC 30.23 bulk matrices. Most urban residential zones, including R-7,200, R-8,400, and R-9,600, allow a maximum lot coverage of 35 percent.
SCC 30.23.010(1)
The bulk matrices contain the setback, lot coverage, building height, and lot dimension regulations for all zones in unincorporated Snohomish County.
1 cities in Snohomish County have their own building setbacks & zoning rules. Each link goes to that city's dedicated page with code citations.
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