Unincorporated Ascension Parish, Louisiana requires a Residential New Construction Permit for a new home and enforces the Louisiana State Uniform Construction Code12. Septic permits come from the Louisiana Department of Health through the parish Health Unit sanitarian3. Ascension Parish also has zoning, and qualifying homeowners may use a state owner-builder licensing exemption without skipping permit or safety requirements45.
At a glance
- Building permit
- Required (Residential New Construction Permit), issued by the Building Department1
- Zoning
- Yes, under the parish's Unified Land Development Code4
- Septic permit
- State-issued (LDH) via the parish Health Unit sanitarian, not the Building Department3
- Owner-builder exemption
- Available for a personal residence, with an affidavit and annual limit5
- Septic soils
- 0% of soils rate free of severe limits for a conventional drain field6
- Driveway culvert on parish road
- Handled by the Parish Call Center, separate from the building permit7
Who to call
Building permits
Ascension Parish Building Department
Residential and commercial building permits, plan review, contractor licensing, and inspections for Ascension Parish
615 E Worthey St, Gonzales, LA 70737
Health department
Local Louisiana Department of Health office for Ascension Parish; its sanitarian takes septic (individual sewerage system) permit applications for the parish
615 E Worthey St, Gonzales, LA 70737
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 Ascension Parish, Louisiana?
Unincorporated Ascension Parish, Louisiana requires a Residential New Construction Permit for new homes, with construction reviewed against the parish Development Code and the Louisiana State Uniform Construction Code1. Louisiana requires parishes to enforce the state construction codes through building-code enforcement officers or certified third-party providers2. The code covers new construction, reconstruction, additions to homes previously built to the International Residential Code, and extensive alterations involving more than 50% of the dwelling unit's area8. Required inspections of residential and commercial structures must be performed by a building-code enforcement officer or certified third-party provider; location-verified photographs or video may be used for roofing inspections9.
Who is the Ascension Parish building department, and how do you reach them?
The Ascension Parish Building Department is the contact for residential and commercial permits, plan review, contractor licensing, and inspections7. Reach the department at 225-450-1002 or [email protected]7. A homeowner may supervise construction of a personal residence under Louisiana's owner-builder licensing exemption, but must file an exemption affidavit to obtain the permit, may build no more than one residence per year except for stated relocation circumstances, and must still meet health and life-safety requirements5. For a first-access driveway or frontage culvert on a public right-of-way, call the Parish Call Center at 225-450-12007.
Does Ascension Parish have zoning?
Yes: Ascension Parish administers zoning through its Unified Land Development Code, with zoning districts and setback standards managed by the Planning Department4. Louisiana does not set one statewide setback, lot-coverage, or building-height number; the applicable parish or municipal zoning district supplies those parcel-specific limits101112. The Planning Office also enforces the parish Subdivision Ordinance governing property divisions throughout Ascension Parish13. Its published process includes pre-application meetings, forms, checklists, and final-plat review, with different requirements for simple divisions, family partitions, and major or minor subdivisions14. The parish publishes a planning and development fee schedule, but confirm the current amount for your application before budgeting15.
How do septic permits work in Ascension Parish?
Louisiana, not Ascension Parish, permits septic systems: a person may not install, alter, or operate an individual sewerage system without a permit from the state health officer316. In practice, sanitarians based in each parish's health unit take the applications, advise on siting, and run the permitting process locally, so start with the Ascension Parish Health Unit rather than the parish Building Department3. A septic tank system may be used only where a community-type sewerage system is not available17. After installation, the installer must notify the parish health unit and submit a Certification by Installer within 15 days of completion before the state issues final approval18. Louisiana caps experimental or developmental septic systems at 3 installations statewide, so most homes will use a conventional or already-approved alternative system, not something novel19. Soils here are a hard constraint: 0% of Ascension Parish's soils carry no severe rating for a conventional septic drain field, so expect a mandatory site evaluation and likely an elevated, mound, or mechanical treatment system6. Reach the Ascension Parish Health Unit at 225-450-1006, 615 E Worthey St, Gonzales, LA 7073720.
Can you live in an RV or tiny home on your land in Ascension Parish?
Louisiana's camping rules apply to Office of State Parks facilities, capping an unreserved stay at 14 consecutive nights or 15 consecutive days; that rule governs state parks, not year-round living on privately owned rural land in Ascension Parish21. Louisiana does not set one statewide minimum dwelling size; any minimum floor-area, RV, or manufactured-home occupancy rule for a specific parcel comes from the applicable parish or municipal zoning district22. Ascension Parish has not published a clear, direct answer on RV or tiny-home living on raw land; check the parcel's zoning district under the Unified Land Development Code and call the Building Department at 225-450-1002 before you buy or move one in47.
Building a home in Ascension Parish: the steps, in order
- Confirm the parcel's zoning district and applicable use, setback, lot-coverage, and height rules before designing the house4. If you will divide the tract, start with the Planning Office's applicable pre-application materials, forms, checklist, fee schedule, and plat-review path1415.
- Apply through the Ascension Parish Health Unit for an individual sewerage permit if community sewer is unavailable31720.
- Apply to the Building Department for the Residential New Construction Permit; an owner-builder claiming the licensing exemption must include the required affidavit15.
- Arrange any public-right-of-way culvert through the Parish Call Center, or obtain a LaDOTD Access Connection Permit before building a driveway onto a state highway723.
- Complete the required code inspections through a building-code enforcement officer or certified third-party provider9.
- After septic installation, ensure the installer submits the Certification by Installer within 15 days for final state approval18.
What to check before you buy land in Ascension Parish
Soils and septic: 0% of Ascension Parish's soils carry no severe rating for a conventional septic drain field, so budget for a full site evaluation and likely an elevated, mound, or mechanical treatment system rather than a standard leach field6. Flood risk: if the parcel is in a regulatory floodway, any project that would raise flood levels needs either a no-rise certification showing 0.00 feet of modeled rise or a floodway revision approved before a permit issues24. Access: a driveway onto a state highway needs a signed LaDOTD Access Connection Permit before construction, while a first driveway culvert onto a parish road goes through the parish Call Center instead237. Terrain and cover: about 99.8% of the parish sits at 15% slope or less and 59.5% is wooded, and the parish sits about 22 miles from the nearest city of 100,000 or more people252627. Taxes: the effective property tax rate runs about 0.5%, with a median annual bill near $1,4192829.
Watch-outs
- The owner-builder exemption is an exemption from contractor licensing, not from permits or health and life-safety rules; it requires an affidavit and generally limits the homeowner to one personal residence per year5.
- Louisiana's individual-sewerage-system permit is a state process: apply through the Ascension Parish Health Unit, not the Building Department, for septic330.
- 0% of Ascension Parish's soils carry no severe rating for a conventional septic drain field, so plan for an elevated, mound, or mechanical system rather than a standard leach field6.
Sources
- Ascension Parish Government - Permitting (2026 county census)
- Louisiana Revised Statutes 40:1730.23, quoted and re-checked
- Louisiana Department of Health - Onsite Wastewater Program (2026 county census)
- Ascension Parish Unified Land Development Code (2026 county census)
- Louisiana Revised Statutes 37:2157, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Ascension Parish Building Department (ascensionparish.net)
- Louisiana Revised Statutes 40:1730.23 — Enforcement of building codes by municipalities and parishes (Louisiana statewide rule), quoted and re-checked
- Louisiana Revised Statutes 40:1730.23, quoted and re-checked
- RS 33:4721 — Regulation of size and use of buildings (Louisiana statewide rule), quoted and re-checked
- RS 33:4721 — Regulation of size and use of buildings (Louisiana statewide rule), quoted and re-checked
- RS 33:4721 — Regulation of size and use of buildings (Louisiana statewide rule), quoted and re-checked
- Planning | Ascension Parish Government, quoted and re-checked
- Planning | Ascension Parish Government, quoted and re-checked
- Planning | Ascension Parish Government, quoted and re-checked
- 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
- 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
- Ascension Parish Health Unit (ascensionparish.net)
- Louisiana Office of State Parks Policy and Procedure Memorandum #6 — Reservation Changes and Refunds (Louisiana statewide rule), quoted and re-checked
- RS 33:4721 — Regulation of size and use of buildings (Louisiana statewide rule), 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
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Louisiana Administrative Code Title 51, Part XIII, Public Health—Sanitary Code (Louisiana statewide rule), 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.