New Construction Septic Systems in Beaumont, TX
Building a new house on a Jefferson County lot with no municipal sewer means an OSSF (on-site sewage facility) is part of the build — and getting the septic scope right early avoids expensive rework mid-build. Site evaluation and soil percolation test drive what system type is legal on the lot; TCEQ permit takes 2–4 weeks and has to be in hand before you occupy. We work directly for homeowners doing owner-builder, or as a sub under your GC.
Bring us in before you buy the lot (if you can)
The soil percolation test decides what septic system your lot supports, and by extension what your building envelope looks like:
- Where the drain field can sit (setback from wells, property lines, and structures).
- Whether you get a cheaper conventional gravity system or a more expensive aerobic.
- Where the driveway and outbuildings can go (setback from field).
- Whether a below-slab septic tie-in works with your foundation type and location.
If the lot came with a prior site evaluation on file with Jefferson County, we pull it and start from there. If not, a fresh evaluation is $400–$900 and answers all four questions before you commit.
Where new construction septic fits in the build schedule
- Pre-build: site evaluation, soil percolation test, system-type decision, TCEQ OSSF permit filing.
- Foundation stage: tank hole location confirmed against final site plan; drain-line rough-out at the slab locates the septic tie-in.
- Framing / rough plumbing: drain lines from the house extended to the tank location.
- Tank + drain field install: usually 3–5 days depending on system type. Coordinated with GC so trenches are not disturbed by other trades.
- County final inspection: Authorized Agent inspects open trenches before cover-up. Any deficiencies fixed same day.
- Cover-up + restoration: trenches back-filled, site restored to grade for landscape.
- Occupancy sign-off: septic permit closed out, records filed with the county. House can be occupied.
The permit side is explained step by step in our guide to TCEQ OSSF permits in Jefferson County.
New construction septic pricing
| Item | Typical range | Notes |
|---|---|---|
| Site evaluation + soil percolation test | $400–$900 | determines allowable system type |
| TCEQ OSSF permit filing (Jefferson Co) | $300–$800 | permit fee + design + processing |
| Conventional install (tank + gravity field) | $4,500–$9,500 | on lots with adequate soil and space |
| Aerobic (ATU) install (tank + spray field) | $8,000–$15,000 | on tight soils, small lots, high water table |
| Drip / low-pressure dose install | $9,000–$16,000 | on very poor percolation |
| Engineered pressurised system | $14,000–$25,000+ | if a Texas PE stamped design is required |
| Aerobic maintenance contract (first year) | $300–$500 | TCEQ requires active contract from day one |
| Coordination with your GC | included | schedule aligned with foundation + rough plumbing |
What we hand your GC (or you) at the end
- TCEQ OSSF permit final, signed off by Jefferson County Environmental Health.
- As-built drawing showing tank and drain field location relative to the house.
- System operating instructions for the homeowner (pumping schedule, dos and don'ts).
- For aerobic systems: signed maintenance contract, first year of service scheduled.
- Copy of the county final inspection report for the house occupancy file.
New construction questions we hear
When should I bring in a septic contractor?
Before you buy the lot if possible — soil percolation test determines what system type is legal, which affects site plan, driveway, and setbacks. At minimum, before you pour the slab. TCEQ OSSF permit takes 2–4 weeks and has to be in hand before you occupy.
Can I use a septic installer other than my GC?
Yes and often should. TCEQ registered septic installers are a specific credential most residential GCs do not hold. Your GC will typically sub the septic scope out; you can specify us as the sub or contract us directly.
What does new construction septic cost in Beaumont?
Conventional $4,500–$9,500. Aerobic $8,000–$15,000. Drip $9,000–$16,000. Engineered pressurised $14,000–$25,000+. Site eval + permit $700–$1,700 separate.
What if the soil test comes back bad?
Does not mean you cannot build — means conventional gravity is off the table. Aerobic (ATU) is the standard fallback on tight soils. Drip is the third route. Site evaluation report will name what your lot supports.
How does it fit the construction schedule?
Site eval + permit early (before foundation). Actual install late in the build, after framing and rough plumbing so drain lines can be tied. County final then cover-up before occupancy.
What if the lot is very small or wet?
Small lots are aerobic candidates. Wet lots are aerobic or drip. Very small AND very wet sometimes require engineered pressurised systems with Texas PE stamped design. Site eval tells us what is realistic.
Plan the septic for your build
Call (409) 895-2078. Or use the callback form. Have the lot address, planned house size (bedroom count matters for tank sizing), and construction stage or expected start.