3 county-level rules, plus city-specific rules for 1 city in Marion County, Oregon.
Verified from official government sources
Standard rural setbacks are 20 feet front, side, and rear. But on farmland a new dwelling must sit 200 feet from any abutting parcel in farm use or timber production, and accessory buildings 100 feet, to protect agriculture.
MCC 17.136.070(A)
Special Setbacks: Dwellings. A special dwelling setback of 200 feet from any abutting parcel in farm use or timber production is required. Accessory buildings. A special setback of 100 feet is required for buildings accessory to a dwelling from any abutting parcel in farm use or timber production.
Dwellings in Marion County's rural zones are capped at 35 feet. Accessory structures start at 9 feet at the lot line, rising one foot per foot of setback up to 35 feet. Farm buildings on farm parcels have no height limit.
MCC 17.117.030(A)
The maximum peak height of any residential accessory structure shall be nine feet at the lot line. Such maximum height may be increased one foot for each one foot of distance from the lot line to a maximum height of 35 feet. Roof drainage shall be accommodated within the confines of the property.
In Marion County residential zones, all accessory structures combined may cover no more than 25 percent of the rear yard area, with fences in RS-zone uses excluded from that calculation (MCC 17.117.020).
MCC 17.117.020
The lot coverage by all accessory structures, except fences in connection with uses in RS zones, shall not be more than 25 percent of rear yard area.
1 cities in Marion County have their own building setbacks & zoning rules. Each link goes to that city's dedicated page with code citations.
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