Lafayette Parish, LA Accessory Structures: ADU Rental Restrictions (2026)
Key Facts
- Apartments per lot
- One maximum
- Size cap
- 25% of home or 800 sq ft
- Rental status
- Allowed
- Separate sale
- Prohibited
- Territory
- City and unincorporated parish
Summary
Lafayette City-Parish allows one accessory apartment per lot, capped at 25% of the main home's floor area or 800 square feet. The unit can be rented out but never sold apart from the house.
(a)Applicability. This section applies to the City of Lafayette, and the unincorporated areas of Lafayette Parish...(d)An accessory apartment may not be sold separately from the principal dwelling unit but may be rented.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 65).
Full Breakdown
Sec. 89-74 lets a property owner build one accessory apartment per lot, sized up to the greater of 25% of the principal dwelling's gross floor area or 800 square feet. Renting the apartment is explicitly allowed, but it cannot be sold separately from the main dwelling. A detached accessory apartment built after the section took effect needs a building permit with a site plan showing the lot, the principal building's floor area, and the accessory unit's location, setbacks, and floor plan. The rule applies in both the City of Lafayette and the unincorporated parish.
Violations & Fines
No permit-specific penalty is quoted in this section; a detached unit built without the required building permit is a building code violation, and the parish's Development and Planning Department can withhold approval or require the structure be brought into compliance.
Frequently Asked Questions
Can I rent out an accessory apartment in Lafayette Parish?
Does this rule apply outside Lafayette city limits?
Do I need a permit to build a rentable accessory apartment?
Sources & Official References
Other rules in Lafayette Parish
Compare Lafayette Parish to another location·View the Louisiana accessory structures overview
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