Zoning, building permits and septic rules in Denham Springs, Louisiana

At a glance

Building permit

Required inside city limits; issued by the city Office of Planning and Development¹

Zoning

The city has its own zoning and a published zoning map²⁴

Building code

2021 International Residential Code edition, under the Louisiana State Uniform Construction Code⁵

Permit fee

$3 per $1,000 of valuation for residential work up to $100,000⁶

Septic

State permit from the Louisiana Department of Health; city rules unconfirmed³

Owner-builder

State exemption from contractor licensing for your own residence, with an affidavit⁷

Who to call

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Does Denham Springs have zoning, and what does it mean for RVs and tiny homes?

Yes. The City of Denham Springs manages zoning through its Office of Planning and Development⁸, and the city publishes a zoning map⁴. Inside city limits, the city's zoning applies, not the parish's rules for unincorporated land².

We could not confirm the district standards: RV living, tiny homes, accessory dwellings, minimum lot size and setbacks are set by the city's zoning ordinance, which we did not read. The city's permit list includes a temporary housing permit and a replacement mobile home permit, so ask the Office of Planning and Development which district your lot is in before you plan anything beyond a standard house⁸.

Do you need a building permit in Denham Springs, and who issues it?

Yes. Residential and commercial construction inside Denham Springs needs a building permit from the city's Office of Planning and Development, and work cannot start until the permit is in hand and posted¹. The city provides project reviews, permit issuing and inspections⁸, and permitted work must be open for inspection by the building official or an authorized representative⁹.

The city applies the Louisiana State Uniform Construction Code, with a 2021 International Residential Code edition listed in its code table⁵. For residential work up to $100,000 in valuation, the published fee is $3 per $1,000⁶.

Subdivisions, re-subdivisions and consolidations inside the city need the city's approval¹⁰.

Who is the Denham Springs building department and how do you reach it?

The City of Denham Springs Office of Planning and Development issues building permits and runs inspections⁸. It is at 116 North Range Ave, Denham Springs, LA 70726, phone (225) 667-8326, email [email protected]⁸. The city posts its permit applications, fee schedule and submittal checklists on that same page¹¹.

The Livingston Parish Building & Permit Department serves unincorporated land only; a lot inside Denham Springs is the city's to permit, not the parish's.

How do septic permits work inside Denham Springs?

Louisiana requires a permit from the state health officer before anyone installs, alters or operates an individual sewerage system in Livingston Parish³. In Livingston Parish, that means the Louisiana Department of Health, Office of Public Health, through the Livingston Parish Health Unit at 20399 Government Blvd., Livingston, LA 70754, phone 225-686-7017¹².

We could not confirm whether a given lot in Denham Springs must connect to city sewer or may use a septic system; the city has a wastewater department. Ask the Office of Planning and Development and the Health Unit before you buy. Louisiana does allow an owner to install a non-mechanical system for personal use under limited conditions¹³.

Building a home in Denham Springs: the steps, in order

1. Confirm the lot's zoning district with the Office of Planning and Development⁸.
2. Check flood status. The city handles floodplain management and development permits in flood hazard areas, and it uses a Federal Emergency Management Agency flood map with an effective date of April 3, 2012¹⁴.
3. Ask the city whether sewer is available, and the Health Unit about septic if not¹².
4. Apply for the building permit; if you are building your own residence without a licensed contractor, Louisiana law requires an affidavit of exemption to get the permit⁷.
5. Post the permit before starting work and schedule inspections¹.
6. Confirm occupancy requirements before moving in; the city requires a certificate of occupancy for buildings, but we could not confirm the residential-specific rule¹⁵.

What stays with Livingston Parish, and what to check before you buy

Septic permits and environmental health stay with the state health unit in the parish¹². For land outside Denham Springs city limits, use the Livingston Parish page, because the parish's rules apply only to unincorporated land¹⁶.

Parish-level numbers: the effective property tax rate is 0.5%¹⁷ and the median property tax bill is $1,079 a year¹⁸. Conventional septic drain fields rate poorly in Livingston Parish soils, so expect a site evaluation and possibly an engineered system if sewer is not available¹⁹.

Watch-outs

• Denham Springs sits in a flood-prone area, so ask the city for the flood zone determination and elevation requirements before you buy or build¹⁴.
• We could not confirm the city's rules on RVs, tiny homes, accessory dwellings, minimum lot size or setbacks; ask the Office of Planning and Development, which handles zoning, for the ordinance text².
• The Louisiana owner-builder exemption covers contractor licensing only and does not waive local or state health and life-safety code requirements⁷.

Sources

1. Planning and Development - City of Denham Springs (Denham Springs), quoted and re-checked
2. Planning and Development - City of Denham Springs (Denham Springs), quoted and re-checked
3. ldh.la.gov, quoted and re-checked
4. Planning and Development - City of Denham Springs (Denham Springs), quoted and re-checked
5. Applicable Construction Codes and Editions (Denham Springs) (Denham Springs), quoted and re-checked
6. Fee Schedule - Office of Planning & Development (Denham Springs), quoted and re-checked
7. Louisiana Revised Statutes 37:2157 — Exemptions, quoted and re-checked
8. City of Denham Springs Office of Planning and Development (cityofdenhamsprings.com)
9. Permit Application O (Occupancy) (Denham Springs), quoted and re-checked
10. Planning and Development - City of Denham Springs (Denham Springs), quoted and re-checked
11. Planning and Development - City of Denham Springs (Denham Springs), quoted and re-checked
12. Louisiana Department of Health, Livingston Parish Health Unit (ldh.la.gov)
13. ldh.la.gov, quoted and re-checked
14. Applicable Construction Codes and Editions (Denham Springs) (Denham Springs), quoted and re-checked
15. Permit Application O (Occupancy) (Denham Springs), quoted and re-checked
16. Zoning and Unified Land Development Code, quoted and re-checked
17. Effective property tax rate: Bolthole Index county data
18. Median property tax bill: Bolthole Index county data
19. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data

Written October 24, 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.