Home › ADU Rules by County › Flagler County
How big a backyard home (accessory dwelling unit) can be in Flagler County, who can build one, and who to call to confirm — from the county's published rules.
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| ADUs allowed? | Yes, with conditions |
|---|---|
| Maximum ADU size | Flagler hasn't published an ADU size cap in our records. Right now it allows guest houses (non-rentable) rather than true ADUs, pending its Dec 1, 2026 ordinance. |
| Owner must live on site? | Not confirmed in our records |
| Manufactured home as an ADU? | Often allowed, subject to the county's ADU and zoning rules |
County code doesn't yet clearly name 'ADUs' — it allows detached 'guest or servant quarters' for guests/inhabitants of the principal home, not for renting or selling. County must allow one ADU by right under state law by Dec 1, 2026. Palm Coast, Bunnell, Flagler Beach set their own rules.
Source: Flagler County Code (guest/servant quarters provision); verified Jul 2026 — no rentable ADU in code yet, ordinance due 2026.
Before You Build
ADU rules are set by each county and city — Florida law (Fla. Stat. 163.31771) lets local governments allow ADUs but doesn't require it — and they can change, so always confirm the current rule with Flagler County before you build.
Confirm with Flagler County: 386-313-4009 · zoning department website ↗
Zoning is set locally and changes often. Answers are guidance only, not a permit guarantee. Always confirm with the local building/zoning department before purchase.
Common Questions
Yes, with conditions. County code doesn't yet clearly name 'ADUs' — it allows detached 'guest or servant quarters' for guests/inhabitants of the principal home, not for renting or selling. County must allow one ADU by right under state law by Dec 1, 2026. Palm Coast, Bunnell, Flagler Beach set their own rules.
Flagler hasn't published an ADU size cap in our records. Right now it allows guest houses (non-rentable) rather than true ADUs, pending its Dec 1, 2026 ordinance.
Our records don't confirm an owner-occupancy requirement for Flagler County — ask the county zoning department before you buy.
Often yes — many Florida counties allow a manufactured or modular home as an accessory dwelling unit, subject to Flagler County's ADU size, lot, and setback rules. Confirm with the county for your parcel.
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