Louisiana ADU Laws

Complete 2026 guide to accessory dwelling unit regulations

○Local Control Only

📋Quick Facts

Max Size
1,200 sq ft
Size Limit
40% of primary
Owner Occupancy
May be required
Parking
Set locally
Approval Process
Varies locally

⚠️Key Requirements & Restrictions

  • •No statewide ADU law - Louisiana operates under Home Rule
  • •Entirely local control - varies by Parish and Municipality
  • •New Orleans: CZO Article 21 allows ADUs, owner-occupancy required, no short-term rentals in residential zones
  • •Legal distinction often hinges on full kitchen (stove/oven) vs. guest house
  • •Must meet 2021 International Residential Code

📖Detailed Analysis

No statewide ADU law - Louisiana operates under Home Rule meaning ADU regulations vary by Parish and Municipality. New Orleans has specific ADU ordinance (CZO Article 21) allowing ADUs in many zones with owner-occupancy requirement (owner must live in main house OR ADU), typically capped at 1,200 sqft or 40% of rear yard, no short-term rentals in residential zones. Shreveport allows up to 800 sqft minimum 150 sqft. Lafayette encourages ADUs in UDC. Jefferson Parish heavily restricts ADUs in R-1 zones. Legal distinction often made between ADU (with full kitchen) vs. guest house/pool house (no stove). Must meet 2021 IRC standards. Strong financial incentives available: State Historic Tax Credit (20-25%), Federal Historic Tax Credit (20%), Restoration Tax Abatement freezes property taxes for 10 years. New Orleans NORA Small Landlord program offers up to $50k subsidies for affordable units.

🔗Official Resources

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⚠️ Disclaimer

The information provided on this website is for general informational purposes only and does not constitute legal, financial, or professional advice. ADU laws, regulations, and requirements vary by jurisdiction and change frequently. While we strive to keep this information accurate and up-to-date, we make no representations or warranties of any kind about the completeness, accuracy, reliability, or suitability of this information. Always consult with qualified local professionals, including attorneys, architects, and your local planning department, before making any decisions regarding ADU construction or investment. Use of this information is at your own risk.

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Last updated: February 2026