ADUs are allowed in Unincorporated ColumbiaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Columbia, FL
Is your property eligible for an ADU?
# of Properties
18,689
Owner-occupied
73%
Zoning districts
29
Avg Home Value
$197,526
Median Lot Size
1.16 acres
Avg Income
$63,892
Residential Types:
18,689 housing units
Single Family
99%
Apts (4+ units)
1%
Zoning Districts:
31,719 parcels · 29 districts
A-3
51%(16,165)
RSF-2
16%(4,977)
ESA-2
9%(2,797)
RSF/MH-2
6%(1,758)
Other
19%(6,022)
ADU Rules
What can you build in Unincorporated Columbia, FL?
Unincorporated Columbia, FL 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 ADU size of 800 square feet
- –Maximum ADU size of 75% of the principal dwelling’s habitable floor area
Detached ADU Size Limits
- –Maximum size of 800 sq ft for a detached accessory dwelling unit
- –Maximum size limited to 75% of the principal dwelling's habitable floor area for a detached accessory dwelling unit
Max Units
- –1 ADU per lot of record
Parking
- –2 spaces/ADU; no max; off-street parking on the same lot unless Board of Adjustment approves within 300 ft by recorded agreement; one- and two-family dwellings exempt from certain parking design standards; comply with all applicable zone district standards.
ADU State Law
What can you build in Florida?
- –Florida does not have a statewide ADU mandate. There is no state-level requirement for cities or counties to allow ADUs.
- –ADUs in Florida are regulated entirely at the local level. Some jurisdictions allow ADUs broadly, others allow them with strict conditions, and some prohibit them altogether.
- –Florida Statute 163.31771 is optional. It allows local governments to adopt ADU ordinances for affordable housing, but it does not require any jurisdiction to allow ADUs, and local governments may adopt ADU rules outside of this statute.
- –County and city rules may differ. In unincorporated areas, county zoning controls whether ADUs are allowed; within city limits, municipal zoning codes apply.
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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ADU rules in other Florida municipalities
Rules change at the town line. Check the municipality your property is actually in.
Columbia County