Can I build an ADU in Orlando?

Yes, ADUs are allowed in most of Orlando, and the city has actually leaned into accessory dwellings as a missing-middle housing tool. The City of Orlando Land Development Code permits Accessory Dwelling Units in R-1 (single-family), R-2 (low-density residential), R-3 (medium-density residential), and most mixed-use and traditional neighborhood zones, subject to size, setback, height, and parking standards.

The size cap typically runs 800 square feet or 50 percent of the primary structure, whichever is smaller, with a maximum building height usually limited to the height of the primary house or 25 feet. Setback rules follow the underlying zone, so an R-1 ADU has to honor the 7.5 to 10 foot side setback and the 15 to 25 foot rear setback. One additional parking space is required, although several walkable neighborhoods near downtown and SoDo have parking-reduction options.

The ADU can be detached (the most common type, a backyard cottage), attached (an addition to the primary home with separate entrance), or interior (a converted garage or basement, though basements are rare in Florida). Owner-occupancy of either the primary home or the ADU is required in most zones, and short-term rental (under 30 days) of an ADU is generally prohibited inside City of Orlando except in specific tourism-corridor sub-zones.

Where it gets complicated:

• HOA governance in Baldwin Park, Lake Nona, Avalon Park, Hunters Creek, Celebration, Windermere, Bay Hill, and most master-planned communities frequently restricts or prohibits ADUs even when the city zoning permits them. Always check the recorded covenants before designing.

• Unincorporated Orange County has its own ADU rules that run parallel to the city. Pine Hills, Christmas, and Wedgefield ADUs go through Orange County Building Division.

• Historic-district overlays, particularly Lake Eola Heights, Thornton Park, Lake Cherokee, and parts of College Park, route ADU exterior design through the Orlando Historic Preservation Board for a Certificate of Appropriateness, which adds four to eight weeks to the permit timeline.

• Septic-served lots (parts of east Orange County, Wedgefield, and unincorporated Bithlo) may need an upgraded onsite-sewage permit through the Florida Department of Health under Title V, and impervious-surface limits may force stormwater design.

Total Orlando ADU budgets in 2026 run $185K to $385K for a 600 to 800 sqft detached unit, with the high end driven by site work, sewer connection, and finish level.

Want Baily to look up your zone, HOA status, and parcel size and walk you through what kind of ADU is realistically buildable on your lot?