ADU rules for Mount Prospect
Accessory Dwelling Unit (ADU) Rules for Mount Prospect, IL
Is your property eligible for an ADU?
# of Properties
18,002
Owner-occupied
72%
Zoning districts
28
Avg Home Value
$42,804
Median Lot Size
0.22 acres
Avg Income
$114,846
Residential Types:
18,002 housing units
Other
100%
Zoning Districts:
19,064 parcels · 28 districts
R1
41%(7,883)
RA
23%(4,415)
R4-PUD
9%(1,751)
RX
6%(1,203)
Other
20%(3,812)
ADU Rules
What can you build in Mount Prospect, IL?
Mount Prospect, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not permitted
- –Detached ADU: Not permitted
Max Units
- –0 ADUs per lot
Rental Restrictions
- –No lease or rental of an unpermitted second housekeeping unit; ADU rentals are prohibited unless legally permitted.
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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ADU rules in other Illinois municipalities
Rules change at the town line. Check the municipality your property is actually in.
Cook County