How Port St. Lucie Handles Accessory Structures: A Practical Guide
Port St. Lucie maintains 124 local ordinances across all categories, and 4 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where Port St. Lucie falls on the strict-to-permissive spectrum compared to other cities.
Garage Conversions
Port St. Lucie requires every single-family home to have a garage or carport of at least 200 square feet at certificate of occupancy, so converting one to living space runs against Section 158.206.
Key details: Code Section: §§ 158.206, 158.221(A)(5). Garage or carport required: Minimum 200 square feet at C.O.. Enclosed storage required: Minimum 80 square feet. Parking with no garage: Two exterior spaces. Permit: Required under adopted FBC 105.1.
Zoning violations are punished under Section 158.999(A) as set out in Section 10.99: $50 first offense, $200 second if uncontested, up to $500 contested, with each day a separate offense.
Tiny Homes
Port St. Lucie sets a minimum house size in every residential district, so a very small dwelling will not qualify as a stand-alone home, and the code separately bans living in a recreational vehicle.
Key details: Governing section: Sec. 158.073(G), zoning code. RS-2 minimum living area: 1,200 sq ft, one-story house. RE and RS-1 districts: 1,700 sq ft of living area. Living in an RV: Prohibited by Sec. 73.03. RV violation fine: $25, up to five days jail.
A dwelling below the district minimum, or a second principal structure on a single-family lot, is a zoning violation punished under Sec. 158.999 and the general penalty in Sec. 10.99, with each day a separate offense.
Compared to other cities, Port St. Lucie takes a harder line on tiny homes. The enforcement and penalty structure reflects that.
Shed & Carport Rules
Section 158.217(C)(2)p caps a carport at 200 square feet on lots under 18,500 square feet and 400 square feet of total carport area on larger lots, with height limited to the principal building roof line or 22 feet.
Key details: Code Section: Sec. 158.217(C)(2)p. Lots under 18,500 sq ft: Maximum 200 square feet. Lots 18,500 sq ft or greater: Maximum 400 square feet total. Maximum height: Roof line or 22 feet. Rear setback: Minimum ten feet.
Zoning violations are punished under section 158.999, which points to section 10.99: $50.00 for a first offense and $200.00 for a second if uncontested and paid within 30 days, up to $500.00 if contested. Each day is a separate offense.
ADU Rules
Port St. Lucie defines an accessory dwelling unit but does not list one among the accessory uses allowed in single-family districts, and Sec. 158.217(C)(2) prohibits every accessory use it does not list. Guest houses are treated separately.
Key details: ADU in accessory-use list: Not listed for RE, RS-1 to RS-3. Unlisted accessory uses: Expressly prohibited (Sec. 158.217(C)(2)). Guest house: Special exception in RE, over one acre. Principal buildings per lot: One (Sec. 158.042). Accessory use size cap: 20% of floor or ground area.
An unpermitted second dwelling unit is enforced through Chapter 37, where Sec. 37.09 allows fines up to $1,000 per day for a first violation and $5,000 per day for a repeat violation.
The Bottom Line
Port St. Lucie's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Port St. Lucie is broadly strict or permissive.
This guide is based on Port St. Lucie's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.