Kissimmee ADU Rules (2026)

New to Kissimmee ADU rules? Start with the quick-check first: our five-question Kissimmee eligibility guide confirms city limits, zoning district, lot size, covenants, and STR overlay in about five minutes using free public records — no address form required.

If your property is inside Kissimmee’s city limits, you are not building under Osceola County’s rules — you are building under the City of Kissimmee’s Land Development Code, which handles ADUs differently on several points that matter. One of those points is large enough to surprise homeowners who found a resource online that described “Osceola County ADU rules” and assumed that covered them: ADUs in Kissimmee’s residential zones are a conditional use, not a by-right use. That means a public hearing.

One other thing worth stating plainly before the details: Florida’s SB 48 ADU preemption bill did not become law. It passed the Florida Senate 38–0 and then died in the House Messages column at sine die on March 13, 2026. Some online resources are writing about Kissimmee ADU rights as if SB 48 passed — it did not. Kissimmee’s own LDC, including its conditional use requirement and owner-occupancy expectation, remains fully in force. Any future change would have to come through either the city’s own legislative process or a bill in the 2027 session.

How Kissimmee’s rules differ from unincorporated Osceola County

Three differences matter most.

The conditional use requirement. In unincorporated Osceola County, an ADU that meets the dimensional standards is approved administratively. In Kissimmee, an ADU in a residential zone (RA-1 through RB-2 and RPB) requires a Conditional Use Permit. That means your application goes to the Development Review Committee and then to a public hearing before the Planning Advisory Board. Neighbors can appear and comment. The board can impose conditions. This adds time, cost, and a layer of uncertainty that does not exist in the unincorporated county. Budget for it.

Smaller size cap with a floor. Kissimmee’s LDC §14-6-2 sets both a minimum and a ceiling on ADU living area. The minimum is 500 sq ft. The ceiling is the lesser of 800 sq ft or 40 percent of the gross floor area of the principal structure at the time of application. Unincorporated Osceola County allows up to 900 sq ft in rural residential zones and 750 sq ft in suburban zones, with no stated minimum. If your primary structure is a 1,400 sq ft house, the effective cap in Kissimmee is 560 sq ft — not 800. You need a primary dwelling of at least 2,000 sq ft for the full 800 sq ft ceiling to apply rather than the 40 percent rule.

Owner-occupancy and homestead exemption required. The LDC explicitly requires the principal structure to be owner-occupied and to maintain a valid Florida homestead exemption. An investor who does not claim the property as their primary residence is not eligible. This is a harder stop than most people expect and is worth confirming before spending anything on design or the CUP application.

Dual impact fees. Properties inside Kissimmee city limits owe both city and county impact fees. Osceola County’s fees alone are among the highest in Central Florida — the county’s transportation/mobility fee was increased roughly 117% in 2025 and now runs approximately $21,710 for a single-family equivalent. Stack on top of that the city’s police, fire, and parks fees (approximately $530 + $2,410 per new residential unit). The combined burden is meaningfully higher than building in unincorporated Osceola, and the billing comes from two separate offices. Confirm the current fee schedule with both the City Building Division and the Osceola County Impact Fee Office before finalizing your pro forma.

The STR trap: Disney proximity does not mean your ADU can be a vacation rental

Kissimmee’s geography creates a specific misconception worth addressing directly. The city sits near Walt Disney World and the broader tourism corridor, and a lot of homeowners assume that proximity makes an ADU eligible for short-term rental income. In most Kissimmee residential zones, it does not.

ADUs in RA-1 through RB-2 zones — the standard single-family residential districts where most Kissimmee homeowners live — are not permitted for short-term rental. Short-term rental activity in Kissimmee is concentrated in a Short-Term Rental Overlay (STRO) district that covers two geographic bands: a Western District closer to the attractions and an Eastern District near Florida’s Turnpike. Most of the well-known vacation rental communities (Windsor Hills, Formosa Gardens, Championsgate, Indian Creek, Reunion Resort) are either in the STRO zone or in unincorporated Osceola County — not in the standard residential zones where ADUs are conditionally permitted.

If your property is in a standard residential zone and you are counting on short-term rental income to make the ADU numbers work, those numbers don’t work. A long-term tenant is the permitted use; anything under 30 days requires an STRO designation that the typical residential parcel does not have.

Before any financial analysis, pull your parcel’s zoning and overlay designation from Kissimmee’s zoning map and confirm it with the city’s Planning & Zoning Division at (407) 518-2140.

Which Kissimmee neighborhoods are realistic ADU candidates

Lot geometry and zoning history matter more than geography in Kissimmee. The practical filter:

Older grid neighborhoods near downtown and along Broadway Avenue — the pre-1980 residential areas in the RA-1 and RA-2 districts have the deeper lots (12,000–9,000 sq ft minimums) that give a detached unit room to meet setbacks. The form-based code that applies to parts of downtown Kissimmee has its own standards worth checking separately, but properties just outside the downtown core on larger lots are the strongest candidates.

Older residential areas east of US-441 — neighborhoods platted in the 1950s through 1970s were built on larger lots than the post-boom subdivisions and typically have the rear-yard depth needed for a detached unit. Setbacks for ADU structures run approximately 5 ft on the side and 10 ft in the rear; an alley setback of 4 ft applies if parking comes off the alley.

Not the tourism-corridor subdivisions. The subdivisions built around the attractions corridor — master-planned communities with HOA covenants and smaller footprint lots — are generally not practical regardless of zoning. Confirm HOA covenants before doing any other analysis.

Minimum lot size to qualify for an ADU in most residential districts is 6,000 sq ft in the lower-density categories; the RA-1 and RA-2 districts require 9,000–12,000 sq ft. A detached ADU carries an additional requirement: the lot must be at least 1.5 times the district minimum. In RA-2 (9,000 sq ft minimum), a detached unit requires at least 13,500 sq ft of lot area. Attached and internal units do not carry the 1.5× requirement. Confirm your specific district’s dimensional table.

Permit process in Kissimmee

The practical sequence for a Kissimmee ADU:

1. Pull your parcel record from the Osceola County Property Appraiser and verify your address is within city limits — not all Kissimmee-area addresses are. The city’s Development Services can confirm at (407) 518-2140.
2. Pull your zoning designation and overlay status from Kissimmee’s zoning map. Confirm your district is one of the ADU-eligible residential zones (RA-1 through RB-2 or RPB).
3. Pull your deed and any HOA covenants before proceeding. Covenants are not overridden by the zoning code.
4. Apply for the Conditional Use Permit through Kissimmee’s Development Services (Planning & Zoning Division, 101 Church Street, Suite 120). The application is reviewed by the Development Review Committee, then scheduled for a public hearing before the Planning Advisory Board. Allow several weeks for scheduling.
5. After CUP approval, submit your building permit application through the EnerGov Citizen Self-Service portal at cityofkissimmeefl-energovweb.tylerhost.net. Plans must be prepared by a Florida-licensed architect or engineer.
6. Permit review runs approximately 4–6 weeks for a straightforward application. Review comments come back through EnerGov.
7. After permit issuance, city impact fees (police, fire, parks) and Osceola County impact fees are billed separately and must be paid before construction starts.
8. Construction, required inspections, and Certificate of Occupancy typically add 4–6 months depending on scope and contractor.

Total realistic timeline from first call to rentable ADU: 10–16 months. The CUP hearing adds a step that most counties do not require, and it is the most common point where projects slip.

Permit and Building Division contact:

• Planning & Zoning: (407) 518-2140
• Building / Permitting: (407) 518-2379 | permitting@kissimmee.gov
• Address: 101 Church Street, Suite 120, Kissimmee, FL 34741
• Online portal: cityofkissimmeefl-energovweb.tylerhost.net

What state law does not change

The Florida statutes that govern ADU construction apply in Kissimmee exactly as they do elsewhere. The Florida ADU law pillar covers these in detail, but briefly:

• Florida Building Code applies to all new construction. Kissimmee building inspectors enforce it.
• Florida Statutes Chapter 489 governs contractor licensing. Your contractor must hold the appropriate certified license class for your project scope.
• Florida Statutes Chapter 713 governs construction liens. Notice to Owner procedures apply.
• The § 163.31771 affordable ADU pathway exists in state law but is optional for municipalities to adopt. It offers a streamlined process for ADUs rented at affordable rates. Whether Kissimmee has adopted this pathway is worth asking the Planning & Zoning Division directly.

Before you start spending

The CUP public hearing requirement is Kissimmee’s single most consequential difference from the surrounding county. It means a neighbor can appear, it means conditions can be imposed, and it means the timeline is partly outside your control. Know that going in, and make sure any contractor or designer you hire has pulled permits specifically in the City of Kissimmee — not just in Osceola County — before you commit to their timeline estimate.

Use our Kissimmee ADU eligibility check to run the five baseline questions before investing any time in design. Our zoning and lot check guide covers the full dimensional and flood-zone analysis in detail. Once you have confirmed parcel eligibility and cleared the CUP, the cost, financing, and bidding guides on this site apply to your project.