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Septic Inspections for Real Estate in Comal County
A septic system is one of the few things that can derail a Comal County closing late and expensively. If you are buying or selling on acreage here, this is what to get in front of.
What the rules actually say
Texas has no statewide mandate for a septic inspection before a property transfer. That is the technical answer, and it is where people get comfortable too early. The practical position is different:
- Lenders usually require one. Most make a satisfactory inspection a condition of financing, so it happens whether the state mandates it or not.
- Many Texas counties do require inspections at transfer, and sellers may need to provide documentation that the system functions properly and meets current regulations.
- Aerobic systems carry a hard requirement: a transfer involving one requires proof of a valid maintenance contract.
Because county practice varies, confirm what applies to your transfer with the Comal County Engineer's Office — 830-608-2090 — rather than relying on general guidance, including ours.
An aerobic system whose maintenance contract lapsed. It is cheap to fix while there is time, and it stops a closing when there is not. If you are listing a property with an aerobic system, verify the contract is current before you go to market. What the contract requires →
What a proper inspection covers
- Records. The original permit, the as-built layout, the system's registration with the county, and the service history.
- Tank condition. Structural integrity, baffles, lids and risers, sludge and scum depth.
- Drainfield or spray field. Signs of surfacing, saturation, ponding, or the tell-tale strip of over-green grass.
- Mechanical components on an aerobic system: compressor, pumps, floats, timers, control panel, alarm.
- Disinfection. Chlorine residual or UV function, and effluent quality.
- Sizing against the house. Whether the system was permitted for the number of bedrooms actually present — additions frequently outgrow the original permit.
- Setback compliance from wells, boundaries, structures and, on the Recharge Zone, recharge features.
If you are buying
- Book the inspection early in the option period. Scheduling and county records take longer than people expect.
- Ask for the permit and as-built documents. A system with no county record is a genuine red flag.
- If it is aerobic, ask to see the contract and the last few inspection reports. Those reports go to the county within 14 days of each visit, so they should exist.
- Check the bedroom count the system was permitted for against the house you are buying.
- Find out whether the property is on the Edwards Aquifer Recharge Zone — it changes what a future replacement would have to be. Why that matters →
- Budget the ongoing maintenance contract, $200 to $500 a year, into your carrying costs.
If you are selling
- Verify the maintenance contract is active and in your name, if the system is aerobic.
- Gather the permit, as-built and service history now rather than under deadline.
- Get the tank pumped if it is anywhere near due. It is a few hundred dollars and it removes an easy objection. Pumping →
- Deal with any surfacing, odour or alarm issue before listing. Those findings cost far more in negotiation than in repair.
- Ask whether a transfer registration is needed so the county's records follow the buyer.
- Consider a pre-listing inspection. Knowing what a buyer's inspector will find is worth the fee.
If a system has genuinely failed, a replacement is permitted against current rules, not the rules that applied when it went in. Sellers of older properties are sometimes told the conventional system they hoped to patch can no longer be permitted on that lot at all, and that an aerobic system is now the only compliant option. Better to discover that before a buyer's inspector does.
A licensed site evaluator has to answer that with a soil test — nobody can tell from a map. Send us your address and we will have local licensed pros quote the evaluation and the install. Request free quotes →
Inspection questions
Is a septic inspection required by law before selling in Texas?
There is no statewide requirement for a septic inspection before a property transfer. In practice most lenders require a satisfactory inspection as a condition of financing, and many Texas counties do require inspections during real estate transactions. Confirm what Comal County expects for your specific transfer before you assume you can skip it.
What is different if the property has an aerobic system?
Aerobic systems bring an extra requirement: a Texas transfer involving one requires proof of a valid maintenance contract. A lapsed contract will hold up a closing, and the obligation transfers to the buyer at completion.
Who pays for the inspection?
It is negotiable and varies deal to deal. Buyers commonly pay for their own inspection; sellers sometimes commission one pre-listing to avoid surprises. If the lender requires it, it gets done regardless of who writes the cheque.
What if the inspection finds problems?
It becomes a negotiation: the seller repairs it, the price is adjusted, or funds are held at closing. What you should not do is paper over it — a system that cannot be permitted is a problem that follows the property, and on a Comal County lot the fix is sometimes a full replacement rather than a repair.
How long does an inspection take?
The visit itself is usually a couple of hours. Getting it scheduled, and getting county records pulled, is what takes time. Book it early in the option period rather than late.
Request free septic quotes
Licensed Comal County OSSF professionals will contact you directly. There is no charge and no obligation.