Assumption Parish, Louisiana requires a Parish Permit Office permit before new construction, enlargement, a qualifying major renovation or a change in occupancy1. Unincorporated Assumption Parish has no zoning ordinance, but building, land-development, septic and floodplain rules still apply2. Permitted work is inspected before occupancy approval34.
At a glance
- Building permit
- Required for new construction, enlargement, qualifying major renovation and occupancy changes1
- Zoning
- No zoning ordinance in unincorporated Assumption Parish; other development rules still apply2
- Septic permits
- State health officer approval through the Assumption Parish Health Unit5
- RV living
- Private-parcel occupancy is unconfirmed; approved RV parks allow temporary camping6
- Tiny homes
- No unincorporated-parish zoning restriction on occupancy; building and sanitation rules still apply7
- Owner-builder
- Contractor-license exemption available for a qualifying personal residence; permits still apply8
- Private wells
- A licensed driller must install and register a new well; domestic wells use post-installation notice9
- Septic soils
- 0% of mapped soils avoid severe conventional drain-field limitations10
Who to call
Building permits
Assumption Parish Permit Office
Parish building permits and occupancy approvals
105 Martin Luther King Drive, Napoleonville, LA 70390
Septic permits
Louisiana Department of Health - Assumption Parish Health Unit
Environmental Health Services and local coordination for onsite wastewater approval
4910 LA-308, Napoleonville, LA 70390
Contact details are copied from each office’s official page and were checked against it on September 29, 2026.
Do you need a building permit in Assumption Parish, Louisiana?
Yes. Assumption Parish requires the owner or authorized agent to apply to the Parish Permit Office before constructing or enlarging a building, changing its occupancy, or undertaking a renovation that exceeds 50% of the work area and requires a code-compliance inspection1. Listed exemptions include certain retaining walls no more than 4 feet high, finish work, qualifying above-ground pools, playground equipment, nonfixed movable fixtures and agricultural shade-cloth structures, but an exemption does not authorize work that violates another applicable rule111. Permitted construction must remain accessible for inspections, including foundation, rough systems, framing, floodplain, energy-efficiency and final inspections as applicable3. A building cannot be occupied until the building official issues a certificate of compliance and the Permit Office issues the Certificate of Occupancy; permit-exempt work does not need that occupancy certificate4.
Who issues building permits in Assumption Parish?
The Assumption Parish Permit Office is the local starting point for a building permit. Its office is at 105 Martin Luther King Drive, Napoleonville, LA 70390, directly behind the Parish Administration Office, and the phone number is 985-369-738612. Office hours are Monday through Friday, 8 a.m. to 4 p.m.12. Louisiana's State Uniform Construction Code applies in Assumption Parish, with statutory limits and amendments, and the parish enforces covered construction through its permit process13. A permit application must identify the work and land, state the intended use, occupancy and valuation, include required construction documents and other information, and be signed14. The building official reviews the filing and must explain a rejection in writing; a conforming application is issued as soon as practicable14.
Does Assumption Parish have zoning?
Unincorporated Assumption Parish has no zoning ordinance215. As a result, unincorporated-parish zoning does not set a general minimum dwelling size, minimum lot size, setback, lot-coverage limit or building-height limit, and it does not restrict accessory-dwelling or tiny-home occupancy7. This does not make a parcel rule-free: subdivision and floodplain controls remain, and the parish separately regulates mobile-home parks, campgrounds and RV parks2166. Manufactured-home park sites, for example, must meet specified size, street-frontage, footing, setback, parking, utility, sewerage and fire-safety standards16. Ask the Parish Permit Office which non-zoning development and floodplain requirements apply before fixing a site plan12.
How do septic permits work in Assumption Parish?
Assumption Parish requires public sewerage where it is available; otherwise, a private sewage system needs specific approval from the state health officer or an authorized representative517. Start with the Assumption Parish Health Unit at 4910 LA-308, Napoleonville, LA 70390, or 985.369.6031; its Environmental Health Services hours are Monday through Friday, 8:00 a.m. to 4:30 p.m.18. Louisiana requires approval of the plans and specifications before an individual sewerage system is installed, altered or operated19. Final verification comes from an onsite inspection, a licensed installer's certification, or both, and the certification must be submitted within 15 days after completion20. Site feasibility is a serious issue: 0% of Assumption Parish's mapped soils avoid severe limitations for a conventional drain field10. A sewage tank must be at least 50 feet from a well or other water source, while disposal fields and lines must be at least 100 feet away17.
Can you live in an RV or tiny home in Assumption Parish?
Unincorporated Assumption Parish has no zoning restriction on tiny-home occupancy, but a tiny home still must satisfy applicable building, permit, inspection, occupancy and sanitation rules714. Assumption Parish's confirmed camping rule covers approved campgrounds and RV parks, where tents, camping trailers and RVs are allowed for temporary overnight camping6. Guests in those parks generally may stay no longer than 180 days and, after leaving, may not return for another 180 days without Police Jury approval6. That commercial-park rule does not answer whether an RV may be occupied on a private homesite, so ask the Parish Permit Office before relying on an RV during construction12. Any private sewage arrangement needs state health approval when public sewerage is unavailable17.
What are the steps to build a home in Assumption Parish?
- Call the Parish Permit Office with the parcel location and proposed use, and ask which land-development and floodplain requirements apply122.
- Confirm sewer availability; if public sewer is unavailable, begin state health review through the Assumption Parish Health Unit before fixing the site plan518.
- If you will act as owner-builder, prepare the required exemption affidavit; the contractor-license exemption applies to a qualifying personal residence but does not remove parish permit or inspection duties8.
- File the signed parish application with the project description, land location, intended occupancy, valuation and required construction documents14.
- Obtain the required permit and building official's release before connecting regulated utilities21.
- Keep permitted work exposed at each required inspection point and complete septic verification before final occupancy approval3204.
- If access connects to a state highway, obtain a signed and numbered LaDOTD access permit before driveway construction22.
What should you check before buying land in Assumption Parish?
Check sewer and soils before committing to a house site. Public sewer must be used where available, private systems require state approval, and 0% of mapped parish soils avoid severe conventional drain-field limitations510. Check the flood map and planned building pad as well: development in a regulatory floodway needs a no-rise certification showing 0.00 feet of rise or an approved floodway revision before the permit and work proceed23. In special flood-hazard areas, the parish publishes development-permit fees of $10 for a residential mobile home and $20 for other residential construction24. Verify whether road access is parish or state controlled; a state-highway connection needs LaDOTD approval before construction22. For a new domestic well, use a licensed drilling contractor and complete the required post-installation registration and notice9.
Watch-outs
- No zoning ordinance does not make an unincorporated Assumption Parish parcel rule-free; subdivision, floodplain, building and sanitation requirements can still apply212.
- The owner-builder provision is a contractor-license exemption, not an exemption from Assumption Parish permits, inspections or occupancy approval8.
- With 0% of mapped soils free from severe conventional drain-field limits, obtain health-unit site approval before treating a parcel as buildable1018.
Sources
- Assumption Parish Administrative Code Ordinance - Permitting Requirements, quoted and re-checked
- Parish Hazard Mitigation Plan, quoted and re-checked
- Assumption Parish Administrative Code Ordinance - Permitting Requirements, quoted and re-checked
- Assumption Parish Administrative Code Ordinance - Permitting Requirements, quoted and re-checked
- Chapter 5 — Building and Construction Regulations, quoted and re-checked
- Chapter 26 - Land Development Regulations, quoted and re-checked
- Louisiana law on county zoning and building authority
- Louisiana Revised Statutes § 37:2157 — Exemptions, quoted and re-checked
- Louisiana Administrative Code, Title 43, Part VI, §701 (Louisiana statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Assumption Parish Administrative Code Ordinance — Permitting Requirements, quoted and re-checked
- Assumption Parish Permit Office (assumptionla.com)
- Louisiana Revised Statutes § 40:1730.28 — State Uniform Construction Code, quoted and re-checked
- Assumption Parish Administrative Code Ordinance - Permitting Requirements, quoted and re-checked
- Parish Hazard Mitigation Plan, quoted and re-checked
- Chapter 26 - Land Development Regulations, quoted and re-checked
- Chapter 5 — Building and Construction Regulations, quoted and re-checked
- Louisiana Department of Health - Assumption Parish Health Unit (ldh.la.gov)
- Louisiana Administrative Code Title 51, Part XIII, Public Health—Sanitary Code (Louisiana statewide rule), quoted and re-checked
- Louisiana Administrative Code Title 51, Part XIII, Public Health—Sanitary Code (Louisiana statewide rule), quoted and re-checked
- Assumption Parish Administrative Code — Permitting Requirements, quoted and re-checked
- LaDOTD Access Connections Policy (Louisiana statewide rule), quoted and re-checked
- State of Louisiana No Rise Certification Guidance (Louisiana statewide rule), quoted and re-checked
- Chapter 5 - Building and Construction Regulations, quoted and re-checked
Written September 29, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.