ADUs are allowed in Unincorporated CollierTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Collier, FL
Is your property eligible for an ADU?
# of Properties
110,060
Owner-occupied
74%
Zoning districts
158
Avg Home Value
$730,921
Median Lot Size
0.23 acres
Avg Income
$105,611
Residential Types:
110,060 housing units
Single Family
92%
2-3 Family
2%
Other
7%
Zoning Districts:
346,467 parcels · 158 districts
PUD
44%(152,624)
E
13%(43,426)
RPUD
6%(20,732)
RMF-6
5%(17,111)
Other
32%(112,574)
ADU Rules
What can you build in Unincorporated Collier, FL?
Unincorporated Collier, FL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 750 sq ft for an attached guesthouse ADU in the GTZO Residential Subdistrict (single-family only).
Detached ADU Size Limits
- –Maximum detached ADU size: 40% of the principal dwelling’s air-conditioned living area, or 750 sq ft within the Bayshore Gateway Triangle CRA overlay.
Owner Occupancy
- –Main residence must be occupied by owner to use guesthouse
Parking
- –2 spaces/ADU; max 2.5 per dwelling unit (outdoor spaces, Mixed Use Urban Residential); no ADU-specific waivers; general countywide rules apply
Rental Restrictions
- –Leasing or renting a guest accommodation facility is prohibited (detached or attached).
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.
Collier County
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