ADU rules for Northfield
Accessory Dwelling Unit (ADU) Rules for Northfield, IL
Is your property eligible for an ADU?
# of Properties
2,540
Owner-occupied
78%
Zoning districts
14
Avg Home Value
$89,885
Median Lot Size
0.40 acres
Avg Income
$175,438
Residential Types:
2,540 housing units
Other
100%
Zoning Districts:
2,899 parcels · 14 districts
R-1
29%(840)
R-4
26%(768)
R-6
14%(400)
R-3
12%(347)
Other
19%(544)
ADU Rules
What can you build in Northfield, IL?
Northfield, 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 permitted
Max Units
- –Detached ADU (all districts): 0 per lot; Attached/internal ADU: none specified; JADU: none specified
Owner Occupancy
- –No owner-occupancy requirement applies
Parking
- –No ADU parking requirement; ADUs not permitted (no accessory building or structure shall be used as a dwelling unit)
Rental Restrictions
- –Detached ADUs cannot be rented at all. Short-term rentals prohibited; minimum 60-day leases required
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