ADUs are allowed in FranklinTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Franklin, IN
Is your property eligible for an ADU?
# of Properties
8,369
Owner-occupied
85%
Zoning districts
28
Avg Home Value
$263,232
Median Lot Size
0.21 acres
Avg Income
$83,059
Residential Types:
8,369 housing units
Single Family
1%
2-3 Family
1%
Apts (4+ units)
13%
Condos
85%
Zoning Districts:
13,537 parcels · 28 districts
RSN
41%(5,609)
RTN
21%(2,826)
PUD
19%(2,625)
MXC
4%(479)
Other
15%(1,998)
ADU Rules
What can you build in Franklin, IN?
Franklin, 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
Interior / Attached ADU Size Limits
- –Maximum size of 1,000 sq ft of living area for an internal or attached accessory dwelling unit
Detached ADU Size Limits
- –Maximum detached ADU size of 1,000 sq ft
Owner Occupancy
- –No owner-occupancy requirement for ADUs
Parking
- –No ADU-specific minimum; must follow underlying district parking standards (e.g., ARR, Manufactured Home Park Dwellings, Multifamily: 2 spaces per unit); RTN: maximum 2 spaces per unit; off-site/shared parking within 500 ft with approval; crushed stone allowed in ARR.
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.
Johnson County