Building a Shed in Louisiana? Permit Rules Explained

Louisiana's Unusual North-South Divide

Louisiana has a shed permitting landscape unlike any other state, and it's driven by a single piece of legislation. Louisiana Revised Statutes 40:1730.30 creates a broad exemption for residential accessory structures — but only in areas where the design wind speed falls below 100 mph.

The statute defines a "residential accessory structure" as a structure not exceeding 500 square feet in footprint, not attached to a residence, and used as an accessory to the primary residential use. In areas below the 100 mph wind speed threshold, parishes and municipalities are prohibited from enforcing the state construction code on these structures.

The 100 mph line roughly splits Louisiana in half. Most of southern Louisiana — from Lake Charles across to the Mississippi border, including Baton Rouge, Lafayette, New Orleans, and Houma — falls at or above 100 mph. Northern Louisiana — Shreveport, Monroe, and the surrounding parishes — generally falls below it.

The result is a sharp divide: a homeowner in northern Louisiana can build a 500-square-foot shed without a construction code permit, while a homeowner in southern Louisiana may need a full building permit for anything over 120 square feet. For a national perspective, see our complete guide to shed permits.

The City Size Override

The RS 40:1730.30 exemption has another important qualifier: municipalities with populations exceeding 45,000 can override the exemption and enforce the state construction code on residential accessory structures. This means Louisiana's major cities — New Orleans, Baton Rouge, Shreveport, Lafayette, and Lake Charles — all have the authority to require permits for sheds that would otherwise be exempt under state law.

In practice, these larger cities do enforce the code, using thresholds of 120–200 square feet depending on their local amendments. Smaller towns in northern Louisiana — where both the population threshold and the wind speed threshold favor exemption — are where the 500-square-foot provision has the most practical impact.

How Five Louisiana Cities Handle Shed Permits

New Orleans: All Structures Need a Permit

New Orleans requires permits for essentially all accessory structures. The city's building department issues Accessory Structure permits, and the review includes verification of compliance with the city's amendments to the International Building Code and the zoning ordinance.

New Orleans adds complexity through its extensive historic districts. Properties in a historic district may need approval from the Historic Districts Landmarks Commission (HDLC) before a building permit can be issued. The HDLC reviews the shed's design, materials, and visibility from the public right-of-way.

Permit fees in New Orleans are valuation-based, typically running $100–$300 for a residential shed. Simple accessory structure permits can sometimes be issued same-day, but projects requiring plan review or HDLC approval take 1–3 weeks or more.

New Orleans is in one of Louisiana's highest wind speed zones, and much of the city sits within FEMA flood zones. The combination of wind, flood, and historic district requirements makes New Orleans one of the most regulated cities in the South for shed construction.

Baton Rouge: 200-Square-Foot Threshold

Baton Rouge (East Baton Rouge Parish) requires a permit for any accessory structure over 200 square feet. The city's building department handles permit applications through the MGO Connect online portal.

Baton Rouge requires all inspections to be completed and passed before a Certificate of Occupancy is issued. For sheds that require a permit, the inspection sequence typically includes a foundation inspection and a final inspection.

The city also requires that residential work exceeding $7,500 be performed by a registered home improvement contractor or licensed residential contractor. Homeowners can act as their own contractor by submitting a notarized affidavit, which is forwarded to the Louisiana State Licensing Board for Contractors.

Permit fees are valuation-based, typically $75–$200 for a standard shed, with review taking 5–10 business days.

Shreveport: Northern Louisiana's Lower Wind Risk

Shreveport benefits from its location in northwestern Louisiana, where design wind speeds are generally below the 100 mph threshold. The city itself (population over 45,000) can enforce the state code on accessory structures, and does — using a 200-square-foot threshold.

However, smaller municipalities and unincorporated areas near Shreveport may be covered by the broader 500-square-foot state exemption if they fall below both the population and wind speed thresholds. Homeowners in the Shreveport metro area should confirm whether they're within the city limits or in a smaller municipality or unincorporated Caddo Parish.

Shreveport's permit fees are modest — $50–$150 for typical shed projects — and reviews run 3–7 business days.

Lafayette: Movable vs. Permanent Foundation

The City of Lafayette makes an interesting distinction based on foundation type. A one-story detached shed on a movable foundation (piers or skids) that is 120 square feet or less is exempt from a building permit for commercial properties, and a 200-square-foot exemption applies for residential playhouses and sheds on movable foundations.

Sheds on permanent foundations, or sheds requiring any utility connections (electrical, water, sewer), need a building permit regardless of size. Metal buildings, pre-engineered structures, and pole barns always require a permit, a floor plan, and engineer-stamped plans with wind load certification.

Lafayette is in the 100+ mph wind zone, so the state's 500-square-foot exemption does not apply. The city requires all structures to comply with development setback requirements, and the building codes division notes that even permit-exempt sheds must follow setback regulations.

Lake Charles: Hurricane Country

Lake Charles sits in one of Louisiana's highest wind risk areas — the city took direct hits from Hurricanes Laura (2020) and Delta (2020) within weeks of each other. The design wind speed exceeds 100 mph, placing Lake Charles firmly within the standard code enforcement zone.

Lake Charles uses a 120-square-foot threshold for the building permit exemption. Any shed over 120 square feet needs a permit, and larger sheds (particularly metal buildings and pre-engineered structures) require wind load certification. The city takes wind resistance seriously, and inspectors verify anchoring and structural connections.

Permit fees run $75–$200 based on valuation, with review taking 5–10 business days.

Farm Structure Exemption

Louisiana law creates a separate, broad exemption for farm structures. Under RS 40:1730.30, a "farm structure" is any structure constructed on a farm for use in farming operations — barns, sheds, poultry houses, and similar buildings — that is not a residence or attached to a residence.

Parishes and municipalities cannot enforce the state construction code on farm structures. This is a complete exemption — not limited by size, wind speed zone, or population threshold. It also extends to private outdoor recreational structures like hunting and fishing camps.

The exemption does not apply to structures originally qualifying as farm structures that have been converted to another use. A barn converted to a workshop or event venue no longer qualifies. Local governments can still require building permits for farm structures — the law only prevents them from enforcing the construction code itself.

Flood Zone Requirements

Louisiana has some of the most extensive flood hazard areas in the country. Vast portions of the state — including much of the New Orleans metro, coastal parishes, and the river corridors — sit within FEMA-designated Special Flood Hazard Areas.

RS 40:1730.30 specifically notes that FEMA's National Flood Insurance Program (NFIP) standards apply to all residential construction. This means even sheds that are otherwise exempt from the state construction code must comply with floodplain management requirements if they're in a flood zone.

Typical flood zone requirements for sheds include:

• Elevation to or above the Base Flood Elevation (BFE), or construction with flood openings allowing water to flow through
• Anchoring to resist flotation, collapse, and lateral movement during flooding
• Flood openings sized at one square inch of net open area per square foot of enclosed floor area

In coastal Louisiana, many properties are in Velocity Zone (V Zone) areas where wave action is expected during flooding. Requirements in V Zones are stricter and may include pile or post foundations.

Wind Load Certification

For sheds in the 100+ mph wind speed zone that require a building permit, the type of construction determines whether an engineer-stamped wind load certification is needed:

• Metal buildings, pre-engineered structures, and pole barns — require a stamped set of plans including wind load certification for the specific location
• Wood-framed sheds built to the prescriptive code — do not require a separate wind load certification, as the IRC's prescriptive provisions address wind resistance for standard construction methods
• Pre-built sheds — should come with manufacturer documentation showing the structure's wind resistance rating meets the local requirement

After the devastating 2020 hurricane season, Louisiana's enforcement of wind resistance standards became notably more rigorous, particularly in the Lake Charles and Houma areas.

Contractor Licensing

Louisiana historically allowed homeowners to pull their own permits and act as general contractor for their own construction. With the state uniform construction code in effect, some jurisdictions have tightened this. Homeowners can generally still act as their own contractor for their personal residence by filing an exemption affidavit with the Louisiana State Licensing Board for Contractors.

Baton Rouge requires this affidavit to be notarized and submitted with the permit application. Other parishes have similar requirements. Licensed contractors must hold a valid state license and a local business license.

HOA Restrictions

Louisiana's suburban communities — particularly in the Baton Rouge suburbs (Prairieville, Denham Springs, Central), the Northshore (Mandeville, Covington), and the Lafayette metro — have significant HOA presence. Common restrictions include material and color matching, mandatory screening, and placement limits.

Consequences of Skipping the Permit

Building without a required permit in Louisiana can result in:

• Stop-work orders and penalty fees
• Retroactive permitting with increased costs
• Structure removal if flood zone, wind zone, or zoning rules are violated
• Insurance denial — damage to or caused by an unpermitted structure during a hurricane or flood may not be covered
• NFIP complications — unpermitted construction in flood zones can affect the entire community's flood insurance standing

Permit fees across Louisiana are modest — $50–$300 depending on the parish and project size. In a state where hurricanes and flooding are genuine risks, proper permitting and code compliance aren't just regulatory requirements — they're protection for your investment.

If you're also planning a garage or carport alongside your shed, each structure needs its own permit in jurisdictions that require them.

For an overview of all building permit requirements in Louisiana — including decks, fences, pools, and more — see our complete Louisiana building permit guide.