Accessory Dwelling Unit (ADU) Rules for Unincorporated Allen, IN

Is your property eligible for an ADU?

# of Properties

13,954

Owner-occupied

24%

Zoning districts

Avg Home Value

$210,463

Median Lot Size

6.85 acres

Avg Income

$100,140

Residential Types:

13,954 housing units

Single Family

61%

2-3 Family

Apts (4+ units)

34%

Other

Zoning Districts:

51,229 parcels · 21 districts

47%(23,868)

41%(21,229)

4%(1,925)

3%(1,545)

Other

5%(2,662)

ADU Rules

What can you build in Unincorporated Allen, IN?

Unincorporated Allen, IN 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

Detached ADU Size Limits

–Maximum detached ADU area must be less than the primary building area (R1, R2, R3, MHS); in A1 and A3 this applies only on lots under 2 acres with on-site sewage.

Max Units

–A1 Agricultural and A3 Estates: Freestanding ADU 1 per lot; Integrated ADU allowed only if no freestanding ADU (minimum 300 sq ft).

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 Indiana municipalities

Rules change at the town line. Check the municipality your property is actually in.

Allen County

Fort Wayne

See all municipalities in Allen County →See all Indiana municipalities →