A carport is an accessory structure under the McHenry County UDO. In R-1, R-2 and R-3 residential districts detached accessory structures are limited to 14 feet (flat/mansard roof) or 18 feet (pitched roof) tall, and must sit at least 10 feet from any lot line.
The UDO treats a carport as a detached accessory structure subject to § 16.56.050A. It must be located at least 10 feet from any lot line and is prohibited in the effective street yard unless set back 50 feet or allowed as a permitted encroachment. Detached accessory structure heights are capped by district: 14 feet flat/mansard or 18 feet pitched in R-1/R-2/R-3, 20 feet in estate and commercial districts, and 24 feet on agricultural parcels under five acres. Heights are measured to the highest point of the structure. A building permit is required; incorporated cities regulate carports under their own codes.
Zoning Enforcement Officer enforces the UDO; a carport exceeding height limits or violating setbacks needs a variation or must be altered or removed.
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See how McHenry County's carport rules rules stack up against other locations.
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