Key Facts Ordinance Text Full Breakdown Violations FAQ Sources More in Flagler County

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

Significant Restrictions

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

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

Key Facts

Term used: 'Guest/servant quarters,' not ADU
Where allowed: AC Agriculture district only, special exception
Occupant limit: Family members and nonpaying guests only
Rental ban: Cannot be rented as a separate dwelling
Approval needed: Special exception (public hearing) required

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

Summary

Unincorporated Flagler County does not allow a general accessory dwelling unit; it permits 'guest/servant quarters' only as a special exception in the AC Agriculture district, and only for unpaid family guests. The Land Development Code's own definition bars renting the space out or using it as a separate dwelling, so a detached accessory unit cannot become an independent rental in the county's agricultural zone.

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

C.Permitted special exceptions.1.Guest/servant quarters. ... Guest/servant quarters: Living quarters within a detached accessory building located on the same lot or parcel of land as the principal dwelling unit, to be used exclusively for housing members of the family occupying the principal building and their nonpaying guest; such quarters shall not be rented or otherwise used as a separate dwelling.

View official code

Full Breakdown

' The closest use it recognizes is 'guest/servant quarters,' defined in Sec. 1 among the 'permitted special exceptions' of the AC, Agriculture district under Sec. C. A special exception is not a use allowed by right: it requires a public hearing and discretionary approval by the county's planning and development board or board of county commissioners before a guest/servant quarters structure can be built, and the definition's ban on renting or separate-dwelling use means an approved unit cannot be leased out independently of the main house.

Because the special exception is tied specifically to the AC district, the same use is not listed as a permitted principal use, accessory use, or special exception in the county's residential (R-1 through R-2), mixed-use, or other zoning districts under Article III.

Violations & Fines

Building a detached guest/servant quarters structure in the AC district without first obtaining special exception approval, or renting the completed quarters out as a separate dwelling in violation of the Sec. 3.08.02 definition, is a Land Development Code violation enforceable through the county's Chapter 162 code enforcement process, which can require removal of the unpermitted structure or termination of the unauthorized rental.

Frequently Asked Questions

Can I build a guest house on my Flagler County property?

Only in the AC, Agriculture zoning district, and only as a special exception requiring public hearing approval. Sec. 3.03.02.C.1 lists 'guest/servant quarters' among the AC district's permitted special exceptions; the use is not listed in the county's residential districts.

Can I rent out a detached guest quarters unit?

No. Sec. 3.08.02 defines guest/servant quarters as housing 'exclusively for housing members of the family occupying the principal building and their nonpaying guest' and states plainly that 'such quarters shall not be rented or otherwise used as a separate dwelling.'

Does unincorporated Flagler County have an ADU ordinance?

Not under that name. The Land Development Code's only comparable use is the AC district's 'guest/servant quarters' special exception, which is narrower than a typical accessory dwelling unit because it bars rental income and applies to only one zoning district.

Sources & Official References

[1]Flagler County Code of Ordinances (Municode)

Other rules in Flagler County

Noise Ordinances: Quiet HoursSome Restrictions Animal Ordinances: Chickens & LivestockSome Restrictions Shed & Carport RulesSome Restrictions ADU Impact FeesLight Restrictions Parking Rules: Loading ZonesSome Restrictions Animal Ordinances: Exotic PetsSignificant Restrictions Animal Ordinances: Veterinary Clinic ZoningSome Restrictions Landscaping Rules: Tree Removal & Heritage TreesSome Restrictions

All Flagler County rules

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

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.

ADU Rules in Cities Across Flagler County

Palm Coast, FL