ADU Rules in Port St. Lucie, Florida

The previous version of this page stated specific Port St. Lucie ADU types, a 1,000 sq ft maximum, generic setbacks, and a 25 ft height limit.

Those values were not tied to a current Port St. Lucie ADU zoning provision and have been removed.

What the City Currently Says

Port St. Lucie's current Planning & Zoning FAQ includes the question:

"Can I build a tiny home or an accessory dwelling unit on my property?"

The City responds by citing §158.042, which generally states that there may be no more than one principal building, structure, or use on a lot except where the zoning code specifically provides otherwise.

That response does not establish a blanket citywide ADU allowance.

Accessory Structures Are Not Automatically ADUs

The zoning code contains provisions for accessory structures and uses.

A shed, detached garage, guest house, or other accessory structure is not automatically a legally permitted independent dwelling unit.

The previous version of this page incorrectly inferred ADU eligibility from general accessory-structure provisions.

What to Verify

Before planning a second dwelling:

1. identify the exact zoning district;
2. ask Planning & Zoning whether the proposed unit is permitted under that district or another specific code provision;
3. verify whether the unit would be treated as a guest house, accessory use, or separate dwelling;
4. confirm building-code, utility, flood, and permit requirements.

Official Source

Port St. Lucie Planning & Zoning

Port St. Lucie Code of Ordinances

Disclaimer: Do not rely on generic ADU dimensions from other Florida cities for a Port St. Lucie property. Confirm current local eligibility first.