Home Additions in Kissimmee, 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 Kissimmee lot.

Kissimmee’s housing is largely 1980s–2000s: Buenaventura Lakes, Remington, Kissimmee Bay, Mill Run and newer Tapestry, with an older downtown grid near the lakefront. The city permits inside its limits; much of the surrounding area is unincorporated Osceola County. For additions and ADUs, it means confirming the zoning, setbacks and any HOA or architectural review for your specific lot before design starts.

Kissimmee's land development code allows one accessory dwelling unit per lot that meets the district's minimum lot size. The ADU must be 500 to 800 sq ft and no more than 40% of the main house, the main house must be owner-occupied with a homestead exemption, and a detached ADU needs a lot 1.5 times the district minimum. Whether your district needs a conditional-use review, we confirm with the city first.

Source: Kissimmee Land Development Code Sec. 14-6-2, City of Kissimmee (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) →

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 Kissimmee Building Division; 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.