ADU rules for Algonquin
Accessory Dwelling Unit (ADU) Rules for Algonquin, IL
Is your property eligible for an ADU?
# of Properties
2,696
Owner-occupied
84%
Zoning districts
19
Avg Home Value
$117,576
Median Lot Size
0.26 acres
Avg Income
$142,897
Residential Types:
2,696 housing units
Apts (4+ units)
95%
Other
5%
Zoning Districts:
11,657 parcels · 19 districts
R-1
45%(5,277)
R-2
17%(2,005)
R-1E
12%(1,435)
R-4
10%(1,117)
Other
16%(1,823)
ADU Rules
What can you build in Algonquin, IL?
Algonquin, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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Is your property eligible for an ADU?
ADU rules in other Illinois municipalities
Rules change at the town line. Check the municipality your property is actually in.
McHenry County