

ADUs are allowed in MillenTypes:Detached
Types:Detached
Accessory Dwelling Unit (ADU) Rules for Millen, GA
Is your property eligible for an ADU?
# of Parcels
2,055
Zoning districts
9
Avg Parcel Value
$107,060
Median Parcel Size
0.31 acres
Zoning Districts:
2,095 parcels · 9 districts
UK
52%(1,087)
R-1B
14%(289)
R-1A
10%(203)
B-1
9%(182)
Other
16%(334)
ADU Rules
What can you build in Millen, GA?
Millen, GA follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: By Right
Detached ADU Size Limits
- –Maximum size is 75% of the lesser of the zoning district’s required minimum dwelling-unit floor area and the primary dwelling’s gross floor area.
- –Accessory building size cap by lot area: 600 sq ft (≤21,780 sq ft), 800 sq ft (21,781–43,560 sq ft), or 1,000 sq ft plus 150 sq ft per additional whole acre above 43,560 sq ft.
Max Units
- –Guest Quarters: 1 per lot with another dwelling; rear yard only. Garage Apartment: 1 per lot with another dwelling; rear yard only.
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –2 spaces/ADU; no max; off-street parking applies to all districts except B-1; additions trigger ADU parking requirements.
Rental Restrictions
- –Family Residential (Guest Quarters) not to be used for rental purposes
ADU State Law
What can you build in Georgia?
- –Georgia does not have a statewide ADU mandate; ADU rules are set by individual municipalities.
- –Building/fire codes are set statewide, but whether an ADU is allowed is local zoning.
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