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ADUs are allowed in Unincorporated Franklin
Types:DetachedInternal

Accessory Dwelling Unit (ADU) Rules for Unincorporated Franklin, MO

Is your property eligible for an ADU?

# of Properties
3
Zoning districts
25
Zoning Districts:
47,020 parcels · 25 districts
W
80%(37,566)
O
6%(3,012)
Y
6%(2,686)
B
3%(1,379)
Other
5%(2,377)

ADU Rules

What can you build in Unincorporated Franklin, MO?

Unincorporated Franklin, MO follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.

Interior / Attached ADU Size Limits

  • –Maximum size of 500 sq ft for an internal accessory dwelling on lots at least 1 acre
  • –Maximum size of 50% of the principal dwelling’s floor area for an internal accessory dwelling on lots at least 1 acre

Detached ADU Size Limits

  • –Maximum detached accessory dwelling unit size of 500 sq ft.
  • –Maximum detached accessory dwelling unit size of 50% of the principal dwelling's size.

Max Units

  • –1 accessory dwelling per lot on parcels with at least 1 acre

Owner Occupancy

  • –Owner-occupancy not required.

Parking

  • –1 off-street space per ADU; must be in a side or rear yard; lots must be at least 1 acre and only one ADU per lot; other ADU standards apply

Rental Restrictions

  • –ADUs may not be rented separately from the property; both detached and attached ADUs cannot be rented as standalone units.

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 Missouri municipalities

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

Franklin County

Union
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