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How big a backyard home (accessory dwelling unit) can be in Lee County, who can build one, and who to call to confirm — from the county's published rules.
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| ADUs allowed? | Yes |
|---|---|
| Maximum ADU size | 750 sq ft or 35% of the main home, whichever is less |
| 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 |
Allowed in single-family residential zones and Agricultural (AG-2) districts. One accessory apartment OR one ADU per single-family residence. Must be on the same lot as the primary home and match its exterior design (except garage conversions). Cape Coral, Fort Myers, Bonita Springs set their own rules.
Source: Lee County Land Development Code; verified Jul 2026 (owner-occupancy not confirmed).
Inside City Limits
If the property is inside city limits, the city's ADU rules apply instead of the county's.
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 Lee County before you build.
Confirm with Lee County: 239-533-8585 · 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. Allowed in single-family residential zones and Agricultural (AG-2) districts. One accessory apartment OR one ADU per single-family residence. Must be on the same lot as the primary home and match its exterior design (except garage conversions). Cape Coral, Fort Myers, Bonita Springs set their own rules.
750 sq ft or 35% of the main home, whichever is less.
Our records don't confirm an owner-occupancy requirement for Lee 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 Lee County's ADU size, lot, and setback rules. Confirm with the county for your parcel.
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Manufactured & modular homes in Lee County · ADU rules for all 67 Florida counties · ADU-sized homes in our showroom
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