ADUs are allowed in ColumbusTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Columbus, IN
Is your property eligible for an ADU?
# of Properties
16,796
Owner-occupied
77%
Zoning districts
22
Avg Home Value
$277,337
Median Lot Size
0.22 acres
Avg Income
$92,019
Residential Types:
16,796 housing units
Single Family
89%
2-3 Family
3%
Apts (4+ units)
3%
Condos
3%
Other
3%
Zoning Districts:
20,098 parcels · 22 districts
RS3
21%(4,202)
RS2
18%(3,557)
RS4
16%(3,308)
RE
14%(2,865)
Other
31%(6,166)
ADU Rules
What can you build in Columbus, IN?
Columbus, IN follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Conditional Use Permit
Interior / Attached ADU Size Limits
- –Maximum size: Residential districts — lesser of 1,000 sq ft or 65% of the primary dwelling; Agricultural districts — 75% of the primary dwelling, with no maximum when retaining a home 50+ years old.
Detached ADU Size Limits
- –Maximum ADU living area: residential districts—lesser of 1,000 sq ft or 65% of the primary residence; agricultural districts—75% of the primary residence (historic-home ADUs 50+ years old are exempt).
Max Units
- –1 ADU per lot for single-family (including single farm dwelling)
- –0 ADUs per lot for duplex or multifamily
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –0 off-street spaces per ADU if on-street parking is allowed on either side of the block fronting the property; otherwise 1 off-street space per ADU in addition to the primary residence spaces. Off-street parking is waived if the block has on-street parking on either side; if not, 1 additional off-street space is required; no driveway is required; spaces must meet Article 7 design standards.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
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.
Bartholomew County