How big can an ADU be in Tampa?

The City of Tampa ADU general standards allow up to 950 sq ft, as of October 2026.

Can I build an ADU outside the Tampa eligible area?

Only as an Extended Family Residence for a family member, which has slightly different requirements.

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Where are ADUs allowed in Tampa?

Q: Where are ADUs allowed in Tampa?

As of October 2026, in the city mapped ADU-eligible area, including Seminole Heights, the area around Lowry Park, the East Tampa and Tampa Heights overlays, and areas added in 2024 such as Sulphur Springs, Temple Crest, Wellswood and parts of Riverside Heights.

Updated October 2026

In a mapped ADU-eligible area, as of October 2026. The city names Seminole Heights, the area around Lowry Park, the East Tampa Overlay and the Tampa Heights Overlay, and its 2024 changes added Sulphur Springs, Temple Crest, Wellswood and parts of Riverside Heights. Elsewhere in the city, a unit is allowed only for family, as an Extended Family Residence.

How do I check my parcel?

Use the city's ADU GIS map viewer, linked from the ADU page, or ask Development & Growth Management. Boundaries follow the map, not neighborhood names, so a house a block outside a neighborhood's informal edge may not qualify.

What rules apply inside the eligible area?

Up to 950 sq ft.
Two stories and 22.5 feet in the general standards; overlays set their own heights.
3-foot rear and interior side setbacks, rising to 20 and 7 feet if the ADU exceeds 15 percent of the lot.
One parking space, and no more than two unrelated adults.
The owner lives on the property.

What changed in 2024?

Local coverage of the October 2024 reform reported that the owner could live in either the main house or the ADU instead of only the main house, that the two-occupant limit now applies to unrelated occupants, and that eligibility expanded north and west. The city's July 2026 ADU page still says the main residence must be owner-occupied, while the general standards guide says the owner must reside on the property. We confirm the current reading with the city.

What is an Extended Family Residence?

It is the city's option outside the eligible area: a second unit created for a family member, with slightly different requirements from an ADU. It is not a route to renting to the public.

Does state law override the map?

No. As of October 2026, Florida has no law requiring cities to allow ADUs everywhere. A 2026 Senate bill, SB 48, would have done that; it passed the Senate 38 to 0 but died in the House in March 2026. The older statute, s. 163.31771, only lets local governments opt in.

When does the map not settle it?

It depends on overlays and historic districts. Parcels in East Tampa, Seminole Heights or Tampa Heights follow neighborhood-specific ADU guides, and historic districts add review. A parcel inside the map can still fail on setbacks or lot coverage. We check all three.

Sources, as of October 2026: City of Tampa ADU page (updated July 2026) and ADU general standards guide; Bay News 9, "City of Tampa reforms accessory dwelling unit policy" (October 2024); Business Observer, "Tampa homeowners turn to backyard units as housing costs climb" (August 2026); Florida Senate, SB 48 (2026) bill history; Florida Statutes s. 163.31771.