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Osceola County, FL Accessory Structures: ADU Rules (2026)

Q: Can I Airbnb my Osceola County ADU?

No. The LDC states an ALU may be rented only with a homestead exemption on the primary structure and only for long-term periods: it is not intended for short-term rentals.

Q: How big can my ADU be?

On lots under one acre, the lesser of 60% of your home's air-conditioned area or 1,000 sq ft. On lots of one acre or more, up to 60% with no square-foot ceiling.

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

ADU rules in Osceola County, FL, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Units allowed: One ALU per conforming lot
Rental limit: Long-term only; homestead required
Max size (<1 acre): Lesser of 60% or 1,000 sq ft
Max size (1+ acre): 60% of primary; no sq-ft cap
Governing code: LDC Sec. 3.6.1 (unincorporated)

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Florida under recent ADU streamlining laws. The Osceola County, FL rules below cover local size, height, and setback requirements.

Summary

Unincorporated Osceola County allows one accessory living unit (ALU) or guest home per conforming lot. It may be rented only if the primary home has a homestead exemption, and only for long-term tenancy: short-term rental of an ALU is prohibited.

City-specific rules exist: Kissimmee has its own adu rules rules that differ from Osceola County's county-level regulations. If you live in Kissimmee, check the city-specific page instead.

Accessory living units (ALUs) are permitted to be rented out only if the primary structure has a homestead exemption and, in this instance, shall only be rented out for long-term (not intended for short-term rentals) time periods. No more than one accessory living unit or guest home shall be permitted per conforming lot.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 71 | Land Development Code: Supplement 10).

Full Breakdown

Under the Land Development Code (LDC Sec. 3.6.1), an ALU/guest home may be attached or detached, must be architecturally compatible with the main house, and requires architectural drawings plus a surveyor's plat. Only one ALU is permitted per conforming lot. Maximum air-conditioned size is the lesser of 60% of the primary structure or, on lots under 1.0 acre, 1,000 sq. ft.; lots of 1.0 acre or more have no square-foot cap. ALUs meeting these standards are not counted toward density. Inside Kissimmee or St. Cloud, the city's ADU rules govern instead.

Violations & Fines

Building/zoning permits required; construction or rental of a non-compliant ALU is a Land Development Code violation enforced by Osceola County Code Enforcement (Chapter 7).

Frequently Asked Questions

Can I Airbnb my Osceola County ADU?

No. The LDC states an ALU may be rented only with a homestead exemption on the primary structure and only for long-term periods: it is not intended for short-term rentals.

How big can my ADU be?

On lots under one acre, the lesser of 60% of your home's air-conditioned area or 1,000 sq ft. On lots of one acre or more, up to 60% with no square-foot ceiling.

Sources & Official References

Other rules in Osceola County

Noise Ordinances: Quiet HoursSome Restrictions Noise Ordinances: Construction HoursSome Restrictions Shed & Carport RulesSome Restrictions Tiny HomesSome Restrictions Garage ConversionsSome Restrictions Noise Ordinances: Leaf Blower RulesSome Restrictions Noise Ordinances: Vehicle NoiseSome Restrictions Noise Ordinances: Aircraft NoiseFew Restrictions Noise Ordinances: Barking DogsSome Restrictions

All Osceola County rules

How Osceola County compares: Easiest Cities to Build an ADU·Florida rules heatmap·Compare Osceola County to another location·View the Florida accessory structures overview

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ADU Rules in Cities Across Osceola County

Kissimmee, FL