ADUs are allowed in GenevaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Geneva, IL
Is your property eligible for an ADU?
# of Properties
7,610
Owner-occupied
90%
Zoning districts
31
Avg Home Value
$156,121
Median Lot Size
0.23 acres
Avg Income
$154,183
Residential Types:
7,610 housing units
Apts (4+ units)
95%
Other
5%
Zoning Districts:
8,870 parcels · 31 districts
R2
22%(1,943)
R1
21%(1,892)
R3
14%(1,219)
R4
11%(965)
Other
32%(2,851)
ADU Rules
What can you build in Geneva, IL?
Geneva, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 1,000 sq ft for an internal accessory dwelling unit.
Detached ADU Size Limits
- –Maximum size of 1,000 sq ft for a detached accessory dwelling unit (backyard cottage).
Max Units
- –1 ADU per zoning lot for single-family principal dwelling lots (attached or detached); 0 ADUs on lots with two-family, three-family, or other non-single-family principal dwellings.
Owner Occupancy
- –Owner must occupy either the principal residence or the ADU
Parking
- –3 total spaces (1 per ADU + 2 for the principal); no waivers.
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.
Kane County