Polk County, FL Accessory Structures: ADU Rules (2026)
ADU rules in Polk County, FL, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Number allowed
- One per lot
- Guest house location
- Rear yard only
- Approval
- Level 1 Review
- Mobile homes
- Not allowed as guest house
- Short-term-rental lots
- ADUs prohibited
Summary
In unincorporated Polk County an accessory apartment, garage apartment, or guest house is allowed as an accessory use to a single-family home. Only one is permitted per lot, a guest house must sit in the rear yard, and it needs a Level 1 Review.
No more than one accessory apartment, garage apartment, or guest house may be permitted on any single-family residential lot or parcel. A guest house shall be located in the rear yard of the principal dwelling unit... Mobile homes shall not be permitted to be used as guest houses.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 109 | Land Development Code: Supplement 12).
Full Breakdown
Polk County's Land Development Code (LDC) Section 206.A lets you add one accessory apartment, garage apartment, or guest house to a single-family detached home in any residential district. No more than one is allowed per lot, and a guest house must be located in the rear yard of the principal dwelling. Garage apartments and guest houses must meet the accessory-structure setbacks in Table 2.2, and mobile homes may not be used as guest houses. Accessory dwelling uses require a Level 1 Review through Land Development. Accessory dwellings are prohibited in developments approved for short-term rental. In 2025 the County was considering capping detached ADUs at 50% of the primary residence, so confirm current standards before you build.
Violations & Fines
Building a second dwelling, guest house, or garage apartment without the required Level 1 Review and building permits is an LDC violation enforced through Chapter 9, and can bring a code-compliance case, stop-work order, and daily fines until corrected.
Frequently Asked Questions
Can I add a guest house in unincorporated Polk County?
Can I rent out an accessory dwelling on a short-term-rental property?
Sources & Official References
Other rules in Polk County
How Polk County compares: Easiest Cities to Build an ADU·Florida rules heatmap·Compare Polk County to another location·View the Florida accessory structures overview
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