ADU Regulations in Louisiana (LA)
Louisiana is rated Moderate for ADU construction with an ADU-friendliness score of 30/100 (Restrictive). Louisiana does not have a statewide ADU law — regulations are set entirely by local jurisdictions. Owner must reside on the property. Additional parking may be required. Louisiana has no statewide ADU legislation. New Orleans has relatively permissive ADU rules due to its traditional urban form with carriage houses and camelback houses. Other cities vary significantly. Baton Rouge adopted ADU provisions in 2022.
Full ADU Regulations Summary for Louisiana
| ADUs Allowed | Yes |
| Statewide ADU Law | No |
| Maximum ADU Size | Set locally |
| Owner Occupancy Required | Yes |
| Parking Required | Yes |
| Minimum Setback | Set locally |
| Permitting Timeline | Varies by jurisdiction |
| Impact Fees | Varies by jurisdiction |
| Long-Term Rental Allowed | Yes |
| Short-Term Rental (Airbnb) Allowed | Yes |
| Ease of Building | Moderate |
ADU Regulations by City in Louisiana
ADU rules can vary by city even within the same state. Without a statewide ADU law, Louisiana cities set their own rules, and policies can differ significantly. Below are ADU details for 2 cities in Louisiana.
New Orleans
ADUs allowed in most residential zones. Carriage houses and secondary dwellings have a long history in New Orleans. Relatively permissive compared to rest of state.
Baton Rouge
ADUs permitted in certain residential zones since 2022 zoning update. Owner occupancy required.
How Louisiana Compares to Other States
Below is a comparison of Louisiana with five states that have similar ADU-friendliness scores. This comparison helps illustrate where Louisiana stands nationally.
| State | Score | Statewide Law | Parking Req? | Owner Occ? | Ease |
|---|---|---|---|---|---|
| Louisiana (LA) | 30 | No | Yes | Yes | Moderate |
| Alabama (AL) | 30 | No | Yes | Yes | Difficult |
| Delaware (DE) | 30 | No | Yes | Yes | Moderate |
| Georgia (GA) | 30 | No | Yes | Yes | Moderate |
| Idaho (ID) | 30 | No | Yes | Yes | Moderate |
| Illinois (IL) | 30 | No | Yes | Yes | Moderate |
Frequently Asked Questions About ADUs in Louisiana
Can I build an ADU in Louisiana?
Yes, ADUs are allowed in Louisiana. However, Louisiana does not have a statewide ADU law, so the specific rules depend on your city or county's zoning code. Some cities are more permissive than others. The ease of building is rated "Moderate" with a friendliness score of 30/100.
Do I need to live on the property to have an ADU in Louisiana?
Yes, Louisiana generally requires owner occupancy — the property owner must live either in the main house or the ADU. This means you cannot rent out both units simultaneously. Note: individual cities may have their own owner-occupancy rules, so check your local zoning.
How big can an ADU be in Louisiana?
Louisiana does not set a statewide maximum ADU size — this is determined by your local jurisdiction. Common local limits range from 600 to 1,200 square feet. Check your city's zoning code for the specific maximum.
How long does it take to get an ADU permit in Louisiana?
The permitting timeline in Louisiana is: Varies by jurisdiction. Without a statewide mandate, permitting timelines depend entirely on your local jurisdiction's review process.
Who decides ADU rules in Louisiana?
Your city or county — Louisiana has no statewide ADU statute, so zoning boards set the rules jurisdiction by jurisdiction. We track 2 Louisiana cities above (including New Orleans); if yours isn't listed, the planning or zoning office is the authoritative source.
Check ADU Rules for Your City
Use our ADU regulations lookup tool to find the specific rules for your city in Louisiana, or browse all 50 states to compare ADU regulations across the country.