ADUs are allowed in Unincorporated SeminoleTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Seminole, FL
Is your property eligible for an ADU?
# of Properties
74,350
Owner-occupied
81%
Zoning districts
79
Avg Home Value
$463,972
Median Lot Size
0.26 acres
Avg Income
$114,702
Residential Types:
74,350 housing units
Single Family
96%
Other
4%
Zoning Districts:
92,472 parcels · 79 districts
PD
42%(38,518)
R-1A
13%(11,995)
R-1AA
11%(10,205)
A-1
8%(7,688)
Other
26%(24,066)
ADU Rules
What can you build in Unincorporated Seminole, FL?
Unincorporated Seminole, 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
- –In A-3, A-5, and A-10 districts, the ADU may be no larger than the lesser of 1,000 sq ft or 35% of the main residence’s gross floor area.
Detached ADU Size Limits
- –Maximum detached ADU size: in A-3, A-5, and A-10, limited to the lesser of 35% of the main residence’s gross floor area or 1,000 sq ft; in all other districts, limited to 50% of the principal dwelling’s living (habitable) area.
Max Units
- –1 ADU per parcel/lot (Agricultural: A-3, A-5, A-10)
Owner Occupancy
- –Owner must occupy the principal dwelling or ADU
Parking
- –1 space/ADU; max 2 spaces; on the same lot and served by the same driveway as the principal dwelling; paved or stabilized surface; not within a required buffer or setback, or to the rear of the unit.
Rental Restrictions
- –ADUs require a minimum 30-day lease; short-term rentals under 30 days are prohibited. The affordable-rental pathway imposes deed restrictions to set rent levels and require eligible tenants in extremely-low, very-low, low, or moderate-income categories.
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.
Seminole County
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