Florida ADU Rules by City: Orlando, Miami-Dade and Tampa

Can you add an accessory dwelling unit to a Florida property? Start with the exact parcel, not the county name on a listing. A mailing address does not establish the zoning authority. The City of Orlando, unincorporated Miami-Dade and the City of Tampa publish different ADU conditions; neighboring municipalities may use different rules again. This comparison helps you ask the right questions before paying for a design.

Compare the official guidance—not just the maximum size

The source links below lead to the local government guides used for this comparison. Treat their conditions as a starting point and verify the current rules for your proposed use, building type and lot.

Orlando: city rules are not Orange County rules

Orlando’s step-by-step guide begins with city limits and zoning, then covers lot-size and planning standards, building standards, impact fees and permitting. A property with an Orlando mailing address can be outside the city. Do not apply the city’s guide to unincorporated Orange County, Winter Garden, Ocoee or Winter Park without confirming jurisdiction.

• Confirm whether the proposed unit is attached, detached or a conversion, and which standards apply.
• Check the full site plan: the main home, ADU, driveway, parking and other paved areas must fit the parcel’s limits.
• Ask about historic or other overlays and any separate utility metering or service requirements.
• Confirm rental use separately; a standard residential lease and short-term rental registration are different questions.

• Building in Orlando and Central Florida
• Follow the build-on-your-own-lot process

Miami-Dade: an ADU and a guesthouse are different uses

Miami-Dade’s guide describes an ADU as an ancillary residential unit on the same lot as the principal single-family dwelling, with its own kitchen, bathroom and sleeping area. Its guesthouse definition is for the main household and family and does not allow renting it for a fee. That distinction matters if rental income is part of your feasibility calculation.

The county refers owners to section 33-22 for restrictions and conditions and offers an ADU Blueprint program with pre-approved designs. A pre-approved design may simplify part of the review, but it does not establish zoning eligibility, solve flood elevation or utility constraints, or replace the permits for your site. Properties in municipalities require confirmation of the municipal rules and any county approvals.

• Miami-Dade lot and permitting considerations
• Check Flood Zone AE before pricing the foundation

Tampa: the neighborhood and intended occupant matter

Tampa’s ADU page identifies Seminole Heights, the area around Lowry Park, the East Tampa Overlay and the Tampa Heights Overlay. Elsewhere in the city, it describes extended family residences for family members with different requirements. The guidance also requires owner occupancy of the main residence. Do not model an investment property as two unrestricted rental units without written confirmation that your intended arrangement is allowed.

The city’s general standards include a maximum size of 950 square feet and one parking space per unit, but supplemental district rules and site conditions also matter. These are City of Tampa guidance figures—not rules for unincorporated Hillsborough, St. Petersburg, Clearwater or the rest of Pinellas County. Confirm the current applicable standards before drawing a 950-square-foot unit.

• Tampa Bay site costs and permit sequence
• Budget impact fees and utility charges separately

Send these questions with your address and APN

1. Which jurisdiction, zoning district and overlays govern this parcel?
2. Is the proposed ADU allowed for the intended occupants and rental use, or is it a guesthouse or family-only unit?
3. What size, height, setbacks, lot coverage, impervious surface and parking rules apply to this exact unit type?
4. Are owner occupancy, minimum lease terms, an affordability affidavit or other use restrictions required?
5. What utility capacity, meters, septic review and connection charges apply?
6. Which planning, floodplain, tree, site and building approvals are required, and in what order?
7. What adopted fee schedule, credits and payment dates apply? Request a written breakdown, not a countywide average.

Turn the zoning answer into a full site budget

ADU feasibility is more than permission to add a dwelling. Carry separate allowances for survey and design, soils and foundation, drainage, utility runs and service changes, permit and impact fees, construction, insurance and a contingency. Under Hivesta’s cost-plus model, management fees also apply and must be shown separately from base construction costs. A garage conversion can have different structural and utility requirements from a detached unit.

• Compare Florida ADU costs by unit type
• Understand statewide ADU law versus local rules
• Request a free parcel-specific feasibility report