ADUs are allowed in MontgomeryTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Montgomery, IL
Is your property eligible for an ADU?
# of Properties
2,550
Owner-occupied
83%
Zoning districts
25
Avg Home Value
$115,794
Median Lot Size
0.21 acres
Avg Income
$95,311
Residential Types:
2,550 housing units
Single Family
2%
Apts (4+ units)
88%
Other
10%
Zoning Districts:
7,224 parcels · 25 districts
R-2
44%(3,190)
R-1
24%(1,768)
R-4
19%(1,360)
R-3
4%(271)
Other
9%(635)
ADU Rules
What can you build in Montgomery, IL?
Montgomery, 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
Size Limits
- –Maximum size of 900 sq ft
Max Units
- –1 ADU per zoning lot on single-unit dwelling lots in A, R-1, R-2, R-3, MD.
- –0 ADUs on lots without a single-unit dwelling.
Owner Occupancy
- –Property owner must maintain permanent residence in principal structure or ADU.
Parking
- –0.5 spaces per dwelling unit (or per bedroom) in the MD District; municipality-wide minimum not specified; tandem parking may be approved via site plan; uses not listed follow the most similar use rule.
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