New Septic Installation in Liberty County, Texas
Licensed, bonded septic system installation for Liberty County — Cleveland, Dayton, Hardin, Hull, Devers, Daisetta and the surrounding rural communities.
Licensed & Bonded
Texas OSF installer
Permitted & Inspected
County health-dept approved
New Installs Only
Built right the first time
Free Estimates
No-obligation, on-site
Updated October 2, 2026
Your Liberty County septic installer
Across Liberty County's rural land, most homes run on their own on-site septic system instead of city sewer. We design, permit, and install new septic systems for new construction, manufactured, and mobile homes throughout the county — including Cleveland, Dayton, Hardin, Hull, Devers, Daisetta — handling the soil and percolation testing and the county OSSF permitting from start to finish.
We install new septic systems for homeowners all across Liberty County, from the county seat in Liberty out to Cleveland, Dayton, Hardin, Hull, Devers, and Daisetta. Out here, most new homes, larger acreage parcels, and manufactured homes aren't on city sewer, so a properly sized on-site septic system is how you make the property livable. Whether you're building fresh or setting a manufactured home on raw land, we size and install the right system for your lot.
What we install in Liberty County
Site Evaluation & Perc Testing
We evaluate your soil and run the percolation test that determines how well your ground absorbs water — the foundation of a system that works.
System Design & Sizing
We size the tank and drainfield to your home's bedroom count and your soil's absorption rate, then engineer a layout that fits your lot.
Permitting & County Approval
We prepare and submit your on-site sewage facility (OSF) permit application and coordinate approvals with your county health department.
Excavation & Site Prep
We prepare the site and excavate for the tank and drainfield with the right grade and setbacks — protecting your wells, structures, and property lines.
Tank Installation
We set the septic tank, connect the inlet and outlet plumbing at the correct grade, and install the effluent filter and risers for easy future access.
Drainfield Installation
We install the drainfield (leach field) that disperses treated effluent safely into the soil, sized to your percolation results and available area.
See how a full septic installation works
Comparing installers? See the best septic installers in Liberty County
We handle Liberty County permitting
On-site sewage facilities (OSSF) are permitted at the county level. We prepare the application, submit the soil and design documentation, and see it through approval and final inspection — so your Liberty County system is fully permitted and passes the county inspection.
In unincorporated Liberty County, the county issues your septic (OSSF) permit through the Liberty County Permit & Inspection Department, the TCEQ Authorized Agent for the unincorporated county. It doesn't issue permits inside the cities of Cleveland, Dayton and Liberty (the City of Liberty runs its own septic permit), and in the county the septic permit has to be bought before the building permit. The application pulls together a recorded Affidavit to the Public, a two-year maintenance contract, proof of ownership (your warranty deed), a site evaluation, soil analysis, the septic design drawing, your 911 address, and the names of your installer and designer. The design has to be done by a licensed Sanitarian or professional engineer and the system installed by a licensed installer, and we handle that whole packet for you and notify the county for inspection before anything gets covered.
Local OSSF permitting authority: Liberty County Permit & Inspection Department
Typical county permit fee: About $275 (county fees change — we confirm the current amount during permitting)
New to septic? Our guides cover the basics: How Much Does It Cost to Install a Septic System in Texas? (2026) · What Size Septic Tank Do I Need? · What Is a Perc Test (and Why Does It Matter)?
Soil & site conditions in Liberty County
Liberty County sits northeast of Houston and runs from flat coastal prairie in the south around Devers, Hull, and Daisetta up to gently rolling pineywoods in the north near Cleveland and Hardin, where the soils run more to loams with a seasonal water table. Across much of the county you'll find fine, slowly-permeable clay and clay-loam soils with a high water table, especially in the low-lying south, which usually fall into the least-permeable TCEQ soil classes. That's why most homes here use an aerobic unit with spray or drip dispersal rather than a conventional gravity field, but the on-site soil evaluation is what sets your exact class.
What a new septic system costs in Liberty County
Our installed prices are flat by system type and cover the system and its installation. The soil evaluation (perc test), the engineered design, and the county permit are not included — we can handle them for you and quote them separately. The soil evaluation also decides which of the three systems your lot needs.
| System type | Installed price |
|---|---|
| Conventional gravity | $8,000 |
| Aerobic (ATU) + spray | $11,950 |
| Aerobic (ATU) + drip | $13,950 |
Liberty County's published single-family OSSF permit fee is $275, and it isn't included in the prices above. County fees change, so the current amount is confirmed when the permit is filed.
Cities & towns we serve in Liberty County
More Liberty County communities we install in
We checked each community the same way as our town pages: spots within 3 miles of the town center, run through the USDA soil survey and FEMA's flood maps. A map sample isn't your lot; the soil borings on your property decide the system.
| Community | Most common soils | Rated "very limited" for a drainfield | In a FEMA high-risk flood zone |
|---|---|---|---|
| Hardin | Aris, Kaman | 22 of 22 spots | 4 of 22 spots |
| Dayton Lakes | Kaman, Cowmarsh | 22 of 22 spots | 21 of 22 spots |
| Kenefick | Kaman, Evadale | 21 of 21 spots | 10 of 21 spots on land |
| Plum Grove | Splendora, Westcott | 22 of 22 spots | 6 of 22 spots |
| North Cleveland | Sorter, Segno | 21 of 21 spots | 5 of 21 spots on land |
| Ames | Orcadia, Texla | 22 of 22 spots | 1 of 22 spots |
| Daisetta | Bevil, Evadale | 22 of 22 spots | 8 of 22 spots |
| Hull | Beaumont, Evadale | 21 of 21 spots | 8 of 21 spots on land |
| Devers | Evadale, Beaumont | 22 of 22 spots | 8 of 22 spots |
| Raywood | Beaumont, Labelle | 22 of 22 spots | 3 of 22 spots |
| Moss Hill | Kaman, Beaumont | 22 of 22 spots | 6 of 22 spots |
| Romayor | Spurger, Kaman | 21 of 21 spots | 14 of 21 spots on land |
| Rye | Vamont, Camptown | 20 of 22 spots | 3 of 22 spots |
| Hightower | Westcott, Sorter | 22 of 22 spots | 3 of 22 spots |
| Tarkington Prairie | Not sampled (no USGS place record in this county) | ||
Sources: USDA NRCS Soil Survey (SSURGO) and FEMA National Flood Hazard Layer, checked October 2, 2026. Spots on open water (lakes, rivers, bays) are left out of the flood column, which covers land only. Check your own lot with the free land check.
We also install new septic systems across the rest of our service area: Harris County · Montgomery County · Fort Bend County · Waller County · Washington County · Grimes County · San Jacinto County · Walker County · Colorado County · Austin County · Wharton County · Brazoria County · Chambers County · Polk County.
Liberty County septic questions
Do I need a permit for a septic system in Liberty County?
Yes. A new on-site sewage facility (OSSF) requires a county permit plus a soil/site evaluation before installation. We handle the full permitting process for you, start to finish.
How much does a septic system cost in Liberty County?
It depends on your soil type, system type, and drainfield size. Use our instant estimator for a ballpark, then we confirm the exact price after a free on-site evaluation.
Do you install septic systems for manufactured and mobile homes?
Yes — manufactured and mobile homes on rural Liberty County land are what we install most. We size and permit the right system for your home and lot.
Who issues septic permits in Liberty County, and what does the permit cost?
In the unincorporated county, the Liberty County Permit & Inspection Department issues your OSSF permit directly, as the TCEQ Authorized Agent for that area; inside city limits it doesn't, and the City of Liberty issues its own $300 septic permit. For a residential system the county permit fee is $275 on the fee schedule adopted June 9, 2026, plus a $10 state TCEQ fee, and every fee doubles if work starts without a permit. Commercial projects cost more and a re-inspection fee can apply, so it's always smart to confirm current fees with the county before you file.
What does the Liberty County septic permit application actually require?
The county application bundles several pieces: a recorded Affidavit to the Public, a two-year maintenance contract, proof of ownership (your warranty deed), a site evaluation, a soil analysis, the septic design drawing, your 911 address, and the names of your installer and designer. The design must come from a licensed Sanitarian or professional engineer, and the install is done by a licensed installer unless you're the owner installing it on your own single-family property. We assemble this packet for you so you're not chasing paperwork.
Why do most Liberty County homes need an aerobic system instead of a standard septic field?
Much of Liberty County has fine, slowly-permeable clay and clay-loam soils with a high water table, especially in the low-lying south around Devers, Hull, and Daisetta. Those soils typically fall into the least-permeable TCEQ classes, where water doesn't drain well enough for a conventional gravity field. In that situation an aerobic treatment unit with spray or drip dispersal is the system that works, and your on-site soil evaluation confirms the right design for your parcel.
Can you install a septic system for a manufactured or mobile home in Liberty County?
Yes. A lot of properties in Liberty County, especially newer manufactured and mobile homes set on acreage around Cleveland, Dayton, and Hardin, aren't connected to city sewer and need their own on-site septic system. We size and install a new system designed for your home's bedroom count and your lot's soil class, permitted directly through the county.
Is there a minimum lot size for a septic system in Liberty County?
For subdivisions platted after June 1, 1986, the county requires a minimum of 0.5 acre if the lot is served by public water, or 1.0 acre if you're on a private well. Lot size is one piece of the picture; your site evaluation and soil analysis also shape the design. If you're not sure where your parcel lands, the county can confirm the rule for your specific lot.
How is the final septic inspection handled in Liberty County?
Before any part of the system gets covered with soil, your licensed installer notifies the county at least five days ahead so it can be scheduled for final inspection, and the system has to be approved before it's buried. The Liberty County Permit & Inspection Department offices are at 311 Travis St. in Liberty, (936) 336-4560, with an additional office in Cleveland. We coordinate the inspection timing with the county so your install passes the first time.
Get your free Liberty County estimate
Tell us about your property and we'll size your system and schedule a free, no-obligation on-site evaluation.
Buying land in Liberty County? Check the soil before you close
Enter any address and get the USDA soil rating, FEMA flood zone, mapped wetlands, and the septic system type you're likely looking at — free, in about ten seconds.
Serving property owners across the region
Counties We Serve
- Harris County
- Montgomery County
- Fort Bend County
- Waller County
- Liberty County
- Washington County
- Grimes County
- San Jacinto County
- Walker County
- Colorado County
- Austin County
- Wharton County
- Brazoria County
- Chambers County
- Polk County
Don't see your county?
We're often able to serve nearby areas too. Reach out with your property's location and we'll let you know if we can help.
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