3 county-level rules, plus city-specific rules for 2 cities in Kane County, Illinois.
Verified from official government sources
For accessory buildings in unincorporated Kane County, the required distance from any road right-of-way is 35 feet, and 10 feet from side and rear lot lines (3 feet from easements). Principal-building setbacks follow the zoning district on the county zoning map.
Kane County Accessory Building Setback Rules & Regulations
Distance required from any road right-of-way is (35) feet unless stipulated greater on zoning map or recorded plat. Distance required from side and back lot line is (10) feet and (3) feet from any easement.
Kane County limits accessory buildings by number and combined floor area rather than a published height table, and no more than two detached accessory buildings are permitted per residence. Maximum principal-building height is set by the zoning district in the Kane County Zoning Ordinance.
Kane County Accessory Building Zoning Restrictions
Not more than (2) detached buildings accessory to a residence are permitted. On lots of (2) acres or less, the detached accessory buildings or structures shall not exceed a combined total of (900) square feet in total floor area under roof.
Kane County caps accessory-building coverage by combined floor area: 900 square feet on lots of 2 acres or less and 1,800 square feet on lots of 2 to 5 acres. Overall lot coverage and floor-area ratios for principal buildings are set by the zoning district.
Kane County Accessory Building Zoning Restrictions
On lots of (2) acres or less, the detached accessory buildings or structures shall not exceed a combined total of (900) square feet in total floor area under roof. On lots greater than (2) acres, but less than (5) acres, the detached buildings or structures shall not exceed a combined total of (1,800) square feet in total floor area under roof.
2 cities in Kane County have their own building setbacks & zoning rules. Each link goes to that city's dedicated page with code citations.
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