3 county-level rules, plus city-specific rules for 2 cities in Larimer County, Colorado.
Verified from official government sources
Setbacks vary by zoning district. Rural Residential and Open districts require 25-foot front, side, and rear setbacks; agricultural and conservation districts require 25-foot fronts with 15-foot sides and rears. Small detached accessory buildings may sit 5 feet from lot lines.
Larimer County Land Use Code §2.9.4(D)
All elements of the accessory building (including eaves and decorative features) shall maintain a distance of five feet from all lot lines.
In most unincorporated Larimer County zoning districts the maximum building height is 40 feet. Agricultural structures may exceed that by up to 20 feet, and height exceptions may apply for certain features.
Larimer County Land Use Code §2.2.3, Table 2-2
Height (Maximum): Building height (ft) 40. [4] Agricultural structures may exceed this requirement by up to 20 feet.
Unincorporated Larimer County does not set a fixed lot-coverage percentage. Instead it controls how much you can build through minimum lot area, setbacks, and the 40-foot height cap, which together define the buildable envelope on your parcel.
2 cities in Larimer County have their own building setbacks & zoning rules. Each link goes to that city's dedicated page with code citations.
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