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

Some Restrictions

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

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

Key Facts

Detached ADU max height: 12 feet, single story
Lofts: Not allowed (detached ADU)
Alternative: Meet principal-dwelling standards
Stairways: No setback encroachment
Applies to: Unincorporated county only

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 Manatee County, FL rules below cover local size, height, and setback requirements.

Summary

In unincorporated Manatee County, a detached accessory dwelling unit may be placed under the Land Development Code. It must be a single story with a maximum height of twelve feet (no lofts) unless it instead meets the principal dwelling's zoning-district setback and height standards.

These county ordinances apply to unincorporated areas of Manatee County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

ADUs, attached or detached, shall follow the setback and height requirements of the principal dwelling's standard zoning district or meet the following requirements... a maximum height of twelve (12) feet and be a single story, with no lofts.

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 124 | Land Development Code: Supplement 21).

Full Breakdown

Manatee County's Land Development Code (Chapter 5) governs accessory dwelling units on unincorporated land. An ADU, attached or detached, must follow the setback and height requirements of the principal dwelling's standard zoning district, or, for a detached ADU, meet the alternative standard: a maximum height of twelve (12) feet and a single story with no lofts. Exterior stairways may not encroach into the district's standard setbacks and may not sit on the rear of the ADU, and porches or balconies must face the principal dwelling. A mobile home may serve as an ADU if it meets the code's square-footage limit. Inside Bradenton, Palmetto, and the Anna Maria Island cities, the city's ADU code applies instead.

Violations & Fines

Building or occupying an accessory dwelling that exceeds the height limit or ignores setback and design standards is a Land Development Code violation enforced by Manatee County code enforcement.

Frequently Asked Questions

How tall can a detached ADU be in unincorporated Manatee County?

A detached ADU meeting the alternative standard has a maximum height of twelve (12) feet and must be a single story with no lofts, per the Land Development Code.

Do the county ADU rules apply inside Bradenton or Anna Maria Island?

No. Inside the cities of Bradenton, Palmetto, Anna Maria, Holmes Beach, and Bradenton Beach, that city's zoning code governs ADUs, not the county.

Sources & Official References

[1]Manatee County Land Development Code, Chapter 5 (Municode)

Other rules in Manatee County

Parking Rules: Overnight ParkingSome Restrictions Shed & Carport RulesSome Restrictions Noise Ordinances: Aircraft NoiseFew Restrictions Noise Ordinances: Barking DogsSome Restrictions Parking Rules: Abandoned VehiclesSome Restrictions Animal Ordinances: Wildlife FeedingHeavy Restrictions Animal Ordinances: Pet Store RulesHeavy Restrictions

All Manatee County rules

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

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