Accessory Structures in Lafayette, LA

If you live in Lafayette or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Lafayette has 3 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

ADU Rules

Lafayette allows one accessory apartment per lot under Sec. 89-74 of the Development Code, capping its living area at whichever is greater: 25 percent of the principal home's gross floor area, or 800 square feet. The unit must meet the principal structure's setbacks, except RS and RM districts get a reduced five-foot rear setback.

Key details: Max apartments per lot: One. Size cap: Greater of 25% floor area or 800 sq ft. Standard setback: Same as principal structure. RS/RM rear setback: 5 ft flat. Applies to: City of Lafayette + unincorporated parish.

Building an accessory apartment that exceeds the 25-percent/800-square-foot cap or violates the setback rule is enforced under Sec. 89-170: a hearing officer can fine the property owner up to $500.00 per offense, and each day the oversized or misplaced unit remains after the compliance deadline is a separate offense. LCG may abate the violation and recover its costs and attorney's fees, with an appeal available to the 15th Judicial District Court within 30 days of the order.

ADU Rental Restrictions

Lafayette lets a homeowner rent out an accessory apartment but not sell it off separately from the main house. Sec. 89-74(d) of the Development Code ties the accessory unit to the principal dwelling's title permanently, while leaving rental income as an allowed use of the space.

Key details: Separate sale: Prohibited. Rental: Expressly allowed. Governing subsection: Sec. 89-74(d). Related size cap: Greater of 25% floor area or 800 sq ft. Related setback: 5 ft rear in RS/RM districts.

Attempting to sell an accessory apartment separately from the principal dwelling, or record it as a separate lot or condominium unit, violates Sec. 89-74(d) and is enforced under Sec. 89-170: a hearing officer can fine the owner up to $500.00 per offense, with each day the improper separation continues counted separately. LCG can seek correction of the title or use, and the owner may appeal within 30 days to the 15th Judicial District Court.

Shed & Carport Rules

Lafayette sets carport and garage setbacks by orientation under Sec. 89-81 of the Development Code: 20 feet from a public-street property line when the structure sits perpendicular to the street, or 10 feet when it runs parallel, with a detached carport allowed in front of the house in most districts.

Key details: Perpendicular setback: 20 ft from street property line. Parallel setback: 10 ft from street property line. MX/D districts: Reduced figures apply per table. Front-yard carport: Allowed outside MX/D if setbacks met. Applies to: City + unzoned unincorporated parish.

Building a garage or carport that violates the Sec. 89-81 street setback is enforced under Sec. 89-170: a hearing officer can fine the property owner up to $500.00 per offense, with each day the structure remains out of compliance after the deadline treated as a separate offense. LCG may abate the violation and recover its costs and a lien against the property, and the owner may appeal to the 15th Judicial District Court within 30 days.

The Bottom Line

Lafayette'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 Lafayette is broadly strict or permissive.

This guide is based on Lafayette's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.