Slab Leaks in Rental Properties: A Texas Landlord's Guide

For a landlord, a slab leak is a double challenge. There is the leak itself, hidden under a floor you do not live on, and there is the tenant, who may not notice the signs, may not report them, or may be the first to complain about a warm floor and a strange sound. Add a water bill that may be in the tenant's name or yours, and an insurance policy written for rentals, and things can get complicated fast. This guide walks Texas landlords through spotting, handling and documenting slab leaks in rental homes. It is general information, not legal advice; for specific obligations, review your lease and consult a Texas real estate attorney if needed.

Why slab leaks go unnoticed in rentals

Tenants often do not see the water bill, especially if utilities are in the owner's name. Even when they do, they may assume a higher bill is normal or seasonal. They may not know what a slab leak looks like, and some hesitate to report problems. Meanwhile, the leak runs around the clock, soaking soil under the foundation and moisture into flooring.

Between tenants, a vacant property can leak for weeks with no one there to notice.

Your repair obligations in Texas

Texas law generally requires residential landlords to make a diligent effort to repair conditions that materially affect the physical health or safety of an ordinary tenant, after the tenant gives proper notice and is current on rent. Plumbing that leaks under the slab, causes water damage, mold or sewer issues can fall into that category. The Texas Property Code sets out notice requirements, timelines and tenant remedies. Your lease may also address repairs. Because details matter, review the statute and your lease, and get advice for specific situations.

Practically speaking, the plumbing under the slab is part of the building, and owners are typically responsible for it.

Set tenants up to report early

The best protection is a tenant who knows what to watch for and how to report it. Consider giving new tenants a short move-in note that says:

• Report any warm spots on the floor, damp carpet, running-water sounds when nothing is on, or sewer smells right away.
• Tell us if the water bill seems unusually high.
• Here is where the main shut-off is, and how to close it in an emergency.
• Here is how to submit a maintenance request.

Many landlords include this in the lease packet or property manager's welcome email.

Check usage yourself

If water is in your name, review usage monthly. If it is in the tenant's name, ask them to share a copy of the bill if usage spikes, or ask the property manager to review it. Many Texas utilities and MUDs offer online portals showing daily usage, which makes leaks easy to spot: usage that never drops to zero, even overnight.

Between tenants, do a meter test as part of turnover: with everything off, read the meter, wait an hour, and read again.

When a tenant reports a possible leak

1. Respond promptly and document the report with the date and what was described.
2. Ask the tenant to do or allow a meter test, or have your property manager or plumber do one.
3. If a leak is likely, schedule professional detection. Coordinate access with proper notice under the lease.
4. Advise the tenant on immediate steps, such as closing the water heater inlet for a confirmed hot-side leak if hot water can be done without briefly, or the main shut-off if water is surfacing.
5. Keep the tenant informed about the schedule and what to expect.

Our slab leak detection overview explains what the visit involves; most take two to four hours.

Access and notice

Your lease likely specifies how much notice you must give before entering. Detection and repair require access to the water heater, main shut-off, meter, bathrooms, kitchen and sometimes the garage and yard. Plan visits during reasonable hours and confirm with the tenant. If pets are present, ask the tenant to secure them.

Who pays the water bill?

If the tenant pays water and a hidden leak under the slab inflated the bill, many landlords choose to credit the tenant for the excess, especially when the leak was not something the tenant could have detected. Some leases address this explicitly. Either way, the utility's leak adjustment policy may help: many Texas cities and MUDs credit part of the excess when a hidden leak is repaired. The account holder usually needs to apply, with the plumber's invoice. Coordinate with your tenant on that.

Insurance for rentals

Landlord or dwelling fire policies, often written on forms different from homeowners policies, cover the building. Coverage for water damage, tear-out and mold varies. The tenant's renters insurance, if they have it, covers their belongings. If the leak damaged the tenant's property, they should contact their insurer. Document everything: the tenant's report, the detection report, photos, invoices and communication.

Habitability during repairs

If repairs require shutting off water or opening floors, the home may be partly or fully unusable for a period. Communicate timelines clearly. For major work, discuss options with the tenant, which may include rent adjustments or temporary arrangements, depending on your lease and the situation. Some landlord policies include loss of rent coverage.

Mold risk

Leaks in occupied rentals can lead to mold, which can affect tenant health and create liability concerns. Act quickly once a leak is confirmed, dry thoroughly, and address any mold properly. In Texas, larger mold remediation projects involve licensed assessors and remediators. Keep records.

Keep a property file

For each rental, keep:

• Lease documents and maintenance request logs.
• Detection reports, repair invoices and photos.
• Meter test results at each turnover.
• Insurance correspondence.
• Utility bills or usage data.

These records protect you in disputes, help with insurance and add value when you sell.

Preventive steps for landlords

• Do a meter test at every turnover.
• Install leak sensors near water heaters and under sinks; some send alerts to your phone.
• Consider a smart shut-off valve for vacant periods.
• Check pressure and install or service a pressure-reducing valve if it is very high.
• Test older properties' drains with a hydrostatic test, especially homes built before 1980.

Working with property managers

If a property manager handles your rental, make sure your management agreement covers how plumbing emergencies and suspected leaks are handled, the spending limit they can approve without you, and whether they can order detection on your behalf. Ask them to include a meter check in every move-in and move-out inspection and to tell you whenever a tenant reports warm floors, damp carpet or high bills. Good managers already do this, but spelling it out avoids confusion when something goes wrong at night or on a weekend.

Budgeting for slab leaks

Slab leaks are one of those expenses that landlords know will come eventually, especially in older properties. Building a modest repair reserve for each property, and knowing in advance which detection company and repair plumber you will call, takes the panic out of the moment. Detection in Texas typically costs $150 to $600, and having a clear report makes repair quotes easier to compare.

Multi-unit buildings

In duplexes, fourplexes and small apartment buildings, units often share a slab and sometimes share plumbing lines or a single meter. A leak under one unit can show up as dampness or warm floors in another. If the property has one meter for several units, a meter test with everything off requires coordinating all tenants, which may be easier during a turnover or with advance notice. Detection professionals can isolate lines for each unit to find which one is leaking.

Landlords with homes near Texas A&M in College Station, around Baylor Scott & White in Temple or in older parts of Richardson see these problems most when a unit sits empty between tenants.

The bottom line

Slab leaks in rentals often go unnoticed until they are big. Teach tenants what to report, watch usage, test at every turnover, and respond quickly with professional detection when a leak is suspected. Handle access with proper notice, be fair about water bills, document everything for insurance, and dry thoroughly to avoid mold. When you need a leak located in a rental, find your city to book a licensed Texas plumber, or see our slab leak FAQs.