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.
For detached accessory buildings, the county limits total floor area under roof rather than a percentage: on lots of 2 acres or less, all detached accessory buildings combined may not exceed 900 square feet; on lots over 2 but under 5 acres, 1,800 square feet combined, with a maximum of two detached accessory buildings. Agricultural animals must be housed and yarded no closer than 100 feet from any residence other than the owner's. Maximum lot coverage or floor-area ratio for principal buildings is established by the property's zoning district in the Kane County Zoning Ordinance (Chapter 25); confirm the district-specific coverage figure with the Building & Zoning Division.
Exceeding the combined accessory floor-area caps or a district's coverage limit is a zoning violation; the county may deny permits or require removal of excess structures.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Backyard composting is legal in Kane County. Code Chapter 15 defines composting as a managed aerobic process, and yard waste is a defined material — but a co...
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Kane County has no ordinance banning or specifically regulating artificial turf on residential property in unincorporated areas. Installations must still mee...
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Kane County actively protects native landscaping: its weed and grass-height ordinances (Chapter 15) expressly exclude prairie plants, so a native/prairie gar...
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Kane County has no ordinance banning rain barrels or cisterns — collecting rainwater on your property is legal in Illinois. The Illinois Plumbing Code govern...
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Kane County sets no countywide lawn-watering schedule — this is the Midwest, not a drought-rationing region. Any watering limits come from your local water u...
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Kane County Code 15-2(1)(a) declares it a nuisance to keep or grow noxious weeds or vegetation that creates a public health/safety hazard on unincorporated l...
See how Kane County's lot coverage limits rules stack up against other locations.
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