Home › ADU Rules by County › Hernando County
How big a backyard home (accessory dwelling unit) can be in Hernando 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 | Hernando hasn't published an ADU size cap in our records. |
| Owner must live on site? | Yes — in the main home or the ADU |
| Manufactured home as an ADU? | Often allowed, subject to the county's ADU and zoning rules |
Restrictive as of mid-2026: ADU allowed only as an ATTACHED addition to an owner-occupied single-family home — detached units not permitted under current code. Property must be owner-occupied. County must conform to state law (allow one ADU by right) by Dec 1, 2026, so this may loosen. Brooksville and Weeki Wachee city rules differ.
Source: Hernando County zoning; verified Jul 2026 (attached-only restriction).
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 Hernando County before you build.
Confirm with Hernando County: 352-754-4050 · 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. Restrictive as of mid-2026: ADU allowed only as an ATTACHED addition to an owner-occupied single-family home — detached units not permitted under current code. Property must be owner-occupied. County must conform to state law (allow one ADU by right) by Dec 1, 2026, so this may loosen. Brooksville and Weeki Wachee city rules differ.
Hernando hasn't published an ADU size cap in our records.
Yes. Hernando County requires the owner to live on the property, in either the main home or the ADU.
Often yes — many Florida counties allow a manufactured or modular home as an accessory dwelling unit, subject to Hernando County's ADU size, lot, and setback rules. Confirm with the county for your parcel.
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