Home Additions in Orlando, FL

Adding on is the most structural work a home can undergo — foundation, framing, roofline, and tie-ins all have to be engineered and permitted correctly. We manage the whole process, from feasibility and design through permits and final finishes.

Additions and accessory dwelling units (ADUs) are handled differently by each jurisdiction — the rules change between each city and the unincorporated parts of Seminole, Orange and Osceola counties. We build to what actually applies to your Orlando lot.

Orlando’s housing runs from 1920s–40s bungalows in College Park, Delaney Park and Audubon Park and the historic districts around downtown, through 1950s–70s ranch neighborhoods, to new construction in Lake Nona and Baldwin Park. The city permits inside its limits; many homes with an Orlando mailing address — in Conway, Dr. Phillips or Azalea Park, for example — are in unincorporated Orange County, which permits there. For additions and ADUs, it means confirming the zoning, setbacks and any HOA or architectural review for your specific lot before design starts.

The City of Orlando allows one ADU per lot — attached, detached, above a garage or as a garage conversion — in all R and MXD districts and in O-1 and O-2, subject to minimum lot size. It is a permitted use, with appearance review alongside the building permit. Long-term rental is allowed and there is no owner-occupancy rule, but both units stay under one owner, and the ADU needs its own electric and water meters and a full kitchen.

Source: Orlando City Code Ch. 58, Part 3A (Secs. 58.500–58.501), per the city's ADU guide, City of Orlando (checked October 2026). Rules change, and HOA covenants can be stricter than the code; we confirm both for your parcel before design.

ADU rules by city (2026) →

Inside the city limits, an addition is permitted through City of Orlando Permitting Services. Many homes with an Orlando mailing address — in Conway, Dr. Phillips or Azalea Park, for example — are in unincorporated Orange County, where the Orange County Division of Building Safety reviews the plans. We confirm the jurisdiction for your exact address before anything is filed.

College Park, Delaney Park and Audubon Park have 1920s–40s bungalows on small lots, so a rear or two-story addition is the usual way to add bedrooms, and inside the city's historic districts exterior changes are reviewed before the permit is issued. In Baldwin Park and Lake Nona the community's architectural review board approves the design before the City of Orlando permit. The 1950s–70s ranch neighborhoods are slab-on-grade block homes where a ground-floor addition ties in cleanly.

If the addition is an accessory dwelling unit, the City of Orlando's ADU Incentive Program rebates up to $10,000 toward construction plus impact and permit fees after the certificate of occupancy, when the unit is rented at or below 120% of area median income for 12 of the first 24 months.

Home addition permits in Orlando & Seminole County →

Typical time: about 3–5 months from permit to finish for a room addition; second stories and ADUs take longer. The stages are the same for every addition we build across Greater Orlando; what changes is the size of the job and the review time at your building department.

1. Site visit and feasibility — we measure, check the slab, roof, electrical panel and plumbing, and confirm the zoning setbacks and any HOA or architectural review for your lot.
2. Design — a floor plan and elevations matched to the house, then a written, itemised estimate.
3. Structural engineering — sealed drawings for the foundation, the roof tie-in and the wind design for your address, plus energy calculations.
4. Permit review — the set goes to City of Orlando Permitting Services; we answer any review comments, and the written schedule you get with the estimate builds in that turnaround.
5. Construction — foundation, framing, the roof tie-in and dry-in, then the trades, insulation, drywall and finishes.
6. Inspections and close-out — every inspection scheduled by us, the permit closed, and a final walkthrough with you.