Building permits in Jefferson Parish, Louisiana
Find the right authority before you build. Jefferson Parish permitting follows Louisiana law — here is exactly who issues the permit and where to start.
County issues permits
Jefferson Parish — Building Permits Department
Jefferson Parish (seat: Gretna) issues building permits through its Parish Building Permits Department for the parish, including its unincorporated areas and contract municipalities. Incorporated cities within the parish (e.g., Kenner) may administer their own permitting.
Open the official permit portal →
Jefferson Parish enforces the Louisiana State Uniform Construction Code; verify whether your address falls within an incorporated city or the parish’s unincorporated area.
Permit cheat-sheet (Louisiana rules)
| Project | Permit? | Authority | Typical fee | Timeline | Go / No-Go | Key notes |
|---|---|---|---|---|---|---|
| 🏠 Accessory Dwelling Unit (ADU) | Conditional | city | Valuation-based; set by the issuing parish/city. | — | Case by case | Louisiana has no statewide ADU mandate; local zoning governs. In New Orleans, properties in historic districts (VCC/HDLC) need extra approvals. Confirm with the local planning department. Exempt: Local limits vary. |
| 🪵 Deck / Porch | Conditional | city | Valuation-based; set by the issuing parish/city. | NOLA residential renovation permits 2-5 business days. | Generally allowed | Attached or elevated decks require a permit and wind/hurricane detailing. Exempt: NOLA exempts uncovered decks <=200 sq ft and <=30 in high, not attached, not serving as an exit. |
| 🧱 Fence / Wall | Conditional | city | Varies by parish/city. | Often same-day/over-the-counter. | Generally allowed | Pool-enclosure fences must meet barrier requirements. Verify height and sight-triangle rules locally. Exempt: NOLA exempts fences up to 7 ft when in compliance with the zoning ordinance; Baton Rouge requires a fence permit. |
| 🛖 Shed / Outbuilding | Conditional | city | Valuation-based; set by the issuing parish/city. | Small sheds often same-day/over-the-counter. | Generally allowed | Even when exempt, the shed must meet zoning setbacks and HOA rules. Exempt: Baton Rouge: accessory structures over 200 sq ft need a permit. Small detached sheds are typically exempt under the IRC. |
| 🪜 Basement Finish | Permit required | city | Valuation-based; includes trade permits. | Standard plan review 2-4 weeks. | Case by case | Basements are rare in Louisiana due to high water tables and flood risk; where built, finishing requires permits and floodplain review. Exempt: Cosmetic finishing (paint, flooring) is exempt. |
| 🚗 Garage / Carport | Permit required | city | Valuation-based; includes trade permits. | New-structure plan review; varies by parish/city. | Generally allowed | Attached and detached garages require a full building permit and plan review, with wind/hurricane detailing. Exempt: Detached garages over the 120 sq ft accessory-structure limit need a permit. |
| ☀️ Rooftop Solar PV | Permit required | city | Building + electrical permits; fee set by parish/city. | Often over-the-counter for small residential PV. | Generally allowed | Wind-borne debris and uplift resistance are critical in Louisiana; use code-approved racking. Exempt: No size exemption; rooftop PV always permitted. |
| 🌡️ HVAC Replacement | Conditional | city | Mechanical permit; fee set by parish/city. | Trade permits often issued same-day. | Generally allowed | Wind/hurricane and energy-efficiency rules apply. Exempt: In-kind replacement in the same location may be exempt per jurisdiction. |
| 🍳 Kitchen Remodel | Conditional | city | Valuation-based when plumbing/electrical/structural work is included. | Standard review for permitted scopes. | Generally allowed | New Orleans historic-district properties need VCC/HDLC approval before work. Exempt: Cabinet/countertop swap in the same layout is exempt. |
| 🛁 Bathroom Remodel | Conditional | city | Valuation-based when plumbing is relocated. | Standard review for permitted scopes. | Generally allowed | Ventilation to the exterior is required. Exempt: Fixture-for-fixture swap in place is often exempt. |
| 🏗️ Room Addition | Permit required | city | Valuation-based; includes trade permits. | Plan review varies by parish/city (Baton Rouge 7 business days standard). | Generally allowed | Floodplain and wind/hurricane detailing are reviewed in Louisiana. Exempt: No exemption — any new conditioned footprint requires a permit. |
| 🪟 Window / Door Replacement | Conditional | city | Usually no fee for in-kind swap; permit needed if opening is enlarged. | In-kind swaps typically need no review (Baton Rouge now requires a permit for window replacement). | Generally allowed | Replacement products must meet wind/impact and energy requirements in Louisiana. Exempt: Same-size, in-kind replacement is generally exempt; Baton Rouge requires a permit for window/door replacement. |
| 🏘️ Roof Replacement | Conditional | city | Baton Rouge requires a permit for roofing replacement. | Same-day/next-business-day in many parishes. | Generally allowed | Louisiana 2026 roof amendment (effective June 1, 2026) adds IBHS FORTIFIED drip-edge and underlayment requirements for wind performance. Exempt: NOLA exempts replacement of less than 50% of roofing on 1-2 family dwellings; Baton Rouge requires a re-roof permit. |
| 🅿️ Driveway / Parking Pad | Conditional | city | Building permit often not required; curb-cut/right-of-way work is separate. | Right-of-way permits reviewed by the parish/city. | Generally allowed | A separate right-of-way permit is usually needed to cut the curb or connect to the street. Exempt: Replacing a driveway in the same footprint (no new curb cut) is generally exempt. |
| 🏊 Swimming Pool / Spa | Permit required | city | Valuation-based; includes barrier/fencing and electrical bonding review. | Plan review 4-6 weeks; barrier inspection before filling. | Generally allowed | Pool barriers (self-latching gates, non-climbable fencing) are required locally. Exempt: Small portable/soft-sided pools may be exempt; permanent pools always permitted. |
| 🧱 Retaining Wall | Conditional | city | Valuation-based when over the height threshold. | Over-threshold walls need plan review. | Generally allowed | Taller or surcharge-supporting walls require a sealed design; floodplain properties need extra review. Exempt: NOLA exempts retaining walls not over 3 ft; taller walls require a permit. |
| 💥 Demolition / Teardown | Permit required | city | Demolition permit fee set by the issuing authority; verify locally. | — | Generally allowed | A full teardown or major strip-out requires a demolition (building) permit. Demolition permits commonly require proof of utility disconnects (water, gas, electric, sewer) and may require asbestos/lead-paint clearance for pre-1978 homes before work begins. Verify the issuing authority for your specific property. |
| 🚰 Septic System | Permit required | county | Septic permit fee set by the local environmental/health authority; engineered systems cost more. | — | Generally allowed | New or replacement onsite wastewater (septic) systems require a permit from the state environmental/health department (or local health district). A soil/perc evaluation and engineered design are typically required; licensed installers perform the work and the system is inspected before backfill. |
| 🔌 EV Charger | Conditional | city | Electrical permit; fee set by the issuing authority. | — | Generally allowed | A home EV charging station (240V branch circuit + wall-mounted EVSE) requires an electrical permit and must meet the NEC (Article 625). Many jurisdictions fast-track residential EVSE. A load calculation and possible service upgrade are reviewed. |
| ⚡ Standby Generator | Conditional | city | Mechanical/electrical permit; fee set by the issuing authority. | — | Generally allowed | A permanently installed standby generator requires mechanical and electrical permits (transfer switch, fuel gas/propane line). Setback, carbon-monoxide ventilation, and noise rules apply; some HOAs restrict generator placement. |
Frequently asked questions
Who issues building permits in Jefferson Parish, Louisiana?
Jefferson Parish — Building Permits Department is the permitting authority for Jefferson Parish. The county issues permits for both unincorporated areas and incorporated cities. Start at the official portal linked above.
Do I go to the county or my city for a building permit in Jefferson Parish?
The county issues permits for both unincorporated areas and incorporated cities.
What home projects need a permit in Jefferson Parish?
The same project types shown in the cheat-sheet above (ADU, deck, fence, shed, solar, and more) — rules follow Louisiana state law. Whether the county or your city issues it depends on your property's incorporation status.
How do I apply for a permit in Jefferson Parish?
Use the official permit portal linked above. Most offices accept online submissions; have your plans, site information, and contractor details ready before applying.