Septic Installers & Permits in Combine, TX (Kaufman/Dallas)
Combine is a rural city of about 2,200 people west of Crandall that spans the Kaufman and Dallas county line, and on its acreage tracts septic is part of almost every build and resale.
Combine, TX spans Kaufman and Dallas counties. On the Kaufman County side, inside or outside city limits, Kaufman County Development Services issues septic permits, and every home needs one regardless of acreage. On the Dallas County side, confirm the office with Dallas County Environmental Health before you design. A new aerobic system plans at $12,000-$18,000.
Check your permit office. County rules here apply to county-permitted properties. Terrell, Oak Ridge, Heath, and TRWD have separate programs. Find the office for your property.
About the prices: these are budgeting examples, not a local quote survey or a published permit-fee schedule. Confirm the scope and current fee before adding costs together. How to use the estimates.
The 2020 census classed every Combine resident as rural, and water in the city comes from Combine Water Supply Corporation. Ask whether a sewer main reaches your parcel before assuming one does. On acreage, plan on septic.
School zoning gives a quick hint about the county but is not proof: Kaufman County parts of Combine are zoned to Crandall ISD, and Dallas County parts to Dallas ISD. The appraisal district record is what settles it.
Septic repair and replacement in Combine
On the Kaufman County side, a repair that needs a permit, such as a new tank or drainfield, goes to Kaufman County Development Services, and every aerobic system has to be under contract with a licensed maintenance provider. That provider is your first call when an alarm sounds. Septic alarm going off explains what the lights mean.
| Repair or replacement item | Typical Kaufman County range |
|---|---|
| Service call / diagnosis | $100-$250 |
| Aerator or pump repair | $400-$1,200 |
| Control panel / float issue | $250-$900 |
| Line or spray-head repair | $150-$1,500+ |
| Aerobic replacement | $12,000-$20,000 |
| Partial replacement (one tank or the field), permitted | $4,000-$9,000 |
Ranges are for planning. Access, system type, and what the technician finds decide the real number. See the full septic repair guide, the replacement guide, or the signs your system is failing.
Buying in Combine, confirm the county on the appraisal record first, then request the permit file from that county's office. Rural tracts often have a shop or second home plumbed into one system, so ask the inspector to compare the permitted bedroom count with the house as it stands. Start with the septic inspection guide.
Is my Combine property in Kaufman County or Dallas County?
Combine covers about seven square miles on both sides of the county line, and a Combine address or the 75159 ZIP code does not tell you which side you are on. The county matters because it decides which septic rules apply and which office holds your permit file.
Check before you pay for a soil evaluation. On a large tract that the line crosses, the permitting office follows where the septic system will go, so ask both appraisal districts and both septic offices if the house and the system could land on different sides.
- Search the address or owner on the Kaufman County appraisal district search (esearch.kaufman-cad.org). If the account is there, the land is in Kaufman County.
- If it is not, search the Dallas Central Appraisal District at dallascad.org.
- Read last year's property tax statement, which lists the county and the City of Combine as taxing units.
- School zoning is a hint, not proof: Kaufman County parts of Combine are zoned to Crandall ISD, and Dallas County parts to Dallas ISD.
Who issues septic permits in Combine?
The City of Combine does not run a septic program. TCEQ's list of authorized agents names the City of Combine among the cities whose septic permitting Kaufman County handles. On the same list, Dallas County's program covers unincorporated Dallas County and ten named cities, and Combine is not one of them.
So the Kaufman County side is clear: Kaufman County Development Services, in town or out. For a parcel on the Dallas County side, call Dallas County's environmental health office and Kaufman County Development Services before anyone designs a system, and get the answer in writing or by email. Our guide to city vs county septic permits in Kaufman County covers the same question for every town.
| What you need | Where it goes | Contact |
|---|---|---|
| Septic permit, Kaufman County side | Kaufman County Development Services | 101 N. Houston St., Kaufman; (469) 376-4127; publicworks@kaufmancounty.net |
| Septic permit question, Dallas County side | Dallas County Health and Human Services, Environmental Health | 2377 N. Stemmons Fwy., Suite 609, Dallas; (214) 819-2115 |
| Building permit, zoning, or contractor registration in the city | City of Combine | 100 Davis Rd., Combine; (972) 476-1532 |
| Water service | Combine Water Supply Corporation | Ask whether your parcel is served before you plan a well |
Combine posts its own building permit packets, building codes, and a contractor registration form. None of that replaces the septic permit, which comes from the county. Plan for both on a new house.
Kaufman County septic rules on the Combine side
Inside Combine city limits on the Kaufman County side, the county's TCEQ-approved order applies exactly as it does on unincorporated land. Several of its rules surprise people buying acreage.
- Every single-family home needs a septic permit, regardless of acreage. The Texas 10-acre exemption does not apply here, as the 10-acre exemption guide explains.
- New lots need at least 1 usable acre per system on public water, or 2 usable acres with a private well. The 1-acre rule explained covers what counts as usable.
- Only a TCEQ-licensed installer can install a system. Owner self-installs are not allowed.
- Every aerobic system must be under contract with a licensed maintenance provider, with inspections every four months. Homeowners cannot maintain their own.
- A new owner needs a maintenance contract in their own name within 30 days of the transfer.
Building a house on Combine acreage
Put septic in the site plan before the house plan is final. The soil and site evaluation decides the system type, and the system's treatment area decides where the house, driveway, and any shop can go. On the Blackland clay of Kaufman County, that usually means an aerobic system with a spray field: in 2024, 488 of 514 county septic permits were surface irrigation (spray) systems (TCEQ data).source
If the property will run on a private well instead of Combine Water Supply Corporation, the well needs at least 50 feet to the tank and 100 feet to the spray area, and a new lot needs 2 usable acres. The septic timeline for building a house and buying acreage: septic questions to ask cover the rest.
| Line item | Kaufman County planning range |
|---|---|
| Soil and site evaluation | $350-$700 |
| County septic permit | about $400-$550 (confirm with Development Services) |
| New aerobic system, installed | $12,000-$18,000 |
| New conventional system, where the soil allows | $6,000-$10,000 |
| Aerobic maintenance contract | $300-$600 a year, plus a $25 county renewal fee |
Shops, barndominiums, and second homes
Rural lots in Combine tend to collect buildings: a shop with a bathroom, a barndominium, a home for a parent. Any new plumbing has to be covered by a permitted system. Either the existing system is sized and permitted for the added flow, or the new building gets its own system.
Kaufman County's application asks for one acre of usable space and a separate 911 address for each additional system on a parcel. Get the existing permit's bedroom count before you plumb anything new into the tank, and read barndominiums, shops, and guest houses on septic before you draw plans.
Most requested in Combine
Combine septic questions
- TCEQ authorized agent search (Kaufman and Dallas counties)
- Kaufman County Development Services FAQs
- Kaufman County TCEQ-approved OSSF order
- Kaufman County OSSF permit application page
- Dallas County Environmental Health
- City of Combine
- Texas Municipal League directory: City of Combine
- TCEQ OSSF permitting data
- Combine, Texas (counties, schools, 2020 census)
Building or buying near Combine?
Send one request to relevant independent local contractor partners.