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How big a backyard home (accessory dwelling unit) can be in Palm Beach 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 | 800 sq ft on lots under 1 acre; 1,000 sq ft on lots of 1 acre or more |
| 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 most residential zones on the same lot as a single-family home. Independent unit with kitchen, 1 bedroom, 1 bath. Must meet the primary dwelling's parking/dimensional requirements. Jupiter, Wellington, Boca Raton and other cities set their own rules — verify county vs. city jurisdiction.
Source: Palm Beach County ULDC; verified Jul 2026 (owner-occupancy not confirmed).
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 Palm Beach County before you build.
Confirm with Palm Beach County: 561-233-5200 · 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. Allowed in most residential zones on the same lot as a single-family home. Independent unit with kitchen, 1 bedroom, 1 bath. Must meet the primary dwelling's parking/dimensional requirements. Jupiter, Wellington, Boca Raton and other cities set their own rules — verify county vs. city jurisdiction.
800 sq ft on lots under 1 acre; 1,000 sq ft on lots of 1 acre or more.
Our records don't confirm an owner-occupancy requirement for Palm Beach 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 Palm Beach County's ADU size, lot, and setback rules. Confirm with the county for your parcel.
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