ADUs are allowed in Unincorporated PinellasTypes:DetachedInternal

Types:DetachedInternal

Accessory Dwelling Unit (ADU) Rules for Unincorporated Pinellas, FL

Is your property eligible for an ADU?

# of Properties

109,042

Owner-occupied

73%

Zoning districts

135

Avg Home Value

$420,344

Median Lot Size

0.22 acres

Avg Income

$87,697

Residential Types:

109,042 housing units

Single Family

98%

Other

Zoning Districts:

126,958 parcels · 135 districts

R-3

28%(35,411)

RPD

26%(33,462)

R-2

9%(11,968)

8%(10,126)

Other

28%(35,991)

ADU Rules

What can you build in Unincorporated Pinellas, FL?

Unincorporated Pinellas, 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 size of 1,000 sq ft countywide; 750 sq ft in the Lealman or Downtown Palm Harbor form-based code areas. (750 sq ft also applies in Coastal Storm Area or flood hazard areas.)
–With approved administrative adjustment (up to 20%): maximum 1,200 sq ft countywide or 900 sq ft in the Lealman or Downtown Palm Harbor form-based code areas.

Detached ADU Size Limits

–Maximum detached ADU size: 1,000 sq ft countywide; 750 sq ft in Lealman FBC and Downtown Palm Harbor FBC districts.
–With special/administrative approval, the detached ADU maximum may increase by up to 20% above the applicable cap.

Max Units

–1 ADU per lot (single-family detached)
–1 ADU per parcel of ownership (Downtown Palm Harbor)

Owner Occupancy

–Owner-occupancy required for either primary unit or ADU

Parking

–0 spaces for ADUs ≤750 sq ft; 1 space per ADU if >750 sq ft; no max. Exceptions: LFBC/DPH have no minimum; coastal storm areas capped at 750 sq ft mean no parking.

Rental Restrictions

–STRs require a Short-Term Rental Certificate of Use; STRs must comply with occupancy cap (max 2 persons per bedroom + 2 in common area, total ≤10), parking (1 off-street space per 3 occupants), quiet hours (10 pm–9 am), responsible party availability, and advertising disclosures.

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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Is your property eligible for an ADU?

ADU rules in other Florida municipalities

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

Pinellas County

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