Foundation Inspection Before Buying a House, and the Electrical Inspection That Goes With It

If you are under contract on a house in San Antonio, your option period is the window to find out what you are buying, and two systems deserve more than a general inspection: the foundation and the electrical. A foundation inspection before buying a house tells you whether the slab is moving and what that means. An electrical inspection tells you whether the panel and wiring are safe and what it costs to correct them. Both questions come up constantly on this city's clay soil and older housing stock, and both are answered best by a licensed specialist.

To be clear about who does what: Wattsmith Electric does the electrical evaluation. Our sister firm, 254 Engineering (Texas Board of Professional Engineers and Land Surveyors firm F-29811), handles foundation and structural evaluations. Wattsmith is not an engineering firm. The two companies work separately, each within its own license, and this guide explains why a buyer often wants both.

Why foundations move on San Antonio clay soil

Much of the San Antonio area sits on expansive clay. Expansive clay behaves like a sponge. When it takes on water, it swells and pushes upward. When it dries out, it shrinks and pulls away. A house built on a slab foundation rides on top of that soil. If the soil under one part of the slab is wetter or drier than the soil under another part, the slab is pushed and dropped unevenly, and the house shows it.

South Texas weather makes this worse. Long dry spells shrink the soil, and heavy rains swell it again. Large trees near the house pull moisture from the soil around their roots. Poor drainage lets water pool against one side of the foundation. Over years, those cycles produce the movement that inspectors write up.

Signs buyers notice on a showing:

• Stair-step cracks in brick veneer, often near the corners of the house or above windows.
• Interior doors that stick, swing open on their own, or have uneven gaps at the top.
• Cracks in drywall running diagonally from the corners of doors and windows.
• Floors that feel sloped, or tile that has cracked in a line across a room.
• Gaps between the trim and the wall or ceiling, or between the brick and the window frames.

Some of these are cosmetic and some are not. Telling the difference is exactly what a general inspection cannot do on its own.

What a general home inspector can and cannot say about a foundation

Texas home inspectors are licensed by the Texas Real Estate Commission, and the TREC inspection report includes a foundation section. The inspector walks the house, notes visible signs of movement, and gives an opinion on whether the foundation appears to be performing as intended. That is useful. It is also the limit of what the inspector is licensed and trained to do.

A home inspector cannot determine why a foundation moved, whether the movement is ongoing, whether it needs repair, or what the repair should be. They cannot issue a sealed letter. When the TREC inspection report says there are signs of foundation movement and recommends further evaluation by a structural engineer, it is telling you that the question needs someone with a different license.

Foundation repair companies also offer evaluations. Their staff can be knowledgeable, but they are evaluating a house for a repair they sell. An independent engineer has no repair contract riding on the answer, and a licensed professional engineer is accountable to the state board for what the sealed report says.

What a structural engineer foundation inspection includes

A structural engineer foundation inspection is an evaluation by a licensed professional engineer. The engineer looks at the same visible signs the home inspector did, and typically takes relative floor elevation measurements across the slab to map how the foundation sits. With those measurements and observations, the engineer forms an opinion on whether the movement is within what is reasonable for the house and soil, what is likely causing it, and whether repair is warranted. If it is, the report describes the repair approach.

At 254 Engineering, a licensed professional engineer evaluates the house and seals the report. The seal is the engineer's professional statement that the evaluation was done by, or under the direct supervision of, a licensed engineer, and it carries the engineer's accountability under Texas law.

Our sister firm, 254 Engineering (Texas Board of Professional Engineers and Land Surveyors firm F-29811), handles foundation and structural evaluations. Scheduling, scope and fees are set by 254 Engineering, so contact them directly at 254engineering.com.

Timing is the part buyers get wrong. A foundation inspection before buying only helps if the report arrives while the option period is still open. Engineers book out like any other professional, so call as soon as the contract is signed, especially if the listing mentions earlier foundation repair or the house shows obvious movement on the first showing.

If the house has had foundation repair, ask the seller for the repair contract, any transferable warranty from the repair company, and the engineer's report that recommended the work, if there was one. An engineer can review those records along with the house. Prior repair is not a reason to walk away, but undocumented repair leaves you guessing about what was done and why.

Why an engineer's letter matters to lenders and buyers

When an appraiser or inspector notes possible structural concerns, a lender can ask for a letter from a licensed professional engineer before the loan moves forward. Underwriting requirements vary by loan type and lender, so ask your loan officer early whether a foundation finding will trigger that request. If it will, the engineer's evaluation needs to happen inside your option period, not after it.

The sealed report also matters for negotiation. A buyer who asks for a repair credit based on a home inspector's note that there are signs of movement is making a general request. A buyer with an engineer's report that describes the condition and the recommended repair is making a specific one. It matters again later: when you sell, the next buyer will ask what was done and who said it was needed.

On foundation inspection cost, each engineering firm sets its own fee based on the size of the house and the scope of the evaluation. 254 Engineering quotes its fee directly. Compare that fee to the size of the decision. A foundation question left unanswered at closing becomes your question for as long as you own the house.

The electrical inspection that goes with it

The electrical system is the other place where a general inspection identifies problems but cannot finish the job. The home inspector will note a Federal Pacific panel, aluminum branch wiring, open grounds, missing GFCI protection, or double-tapped breakers. They will recommend evaluation by a licensed electrician. What they cannot give you is the scope of the correction and a price, and without those you cannot negotiate a fair repair or credit.

Our electrical inspection before buying covers the service and panel, the panel brand and condition, grounding and bonding, the wiring type, a sample of outlets and switches throughout the house, GFCI and AFCI protection, smoke alarms, and any additions or remodel work. We look closely at older homes for knob and tube, aluminum branch wiring, and undersized services. You get photos and a written report signed by a Texas licensed master electrician, with a flat price for each correction.

The evaluation itself is a flat line in our book: the Pre-sale or insurance electrical inspection task, from $509. You know the price when you book, and the written report is yours to attach to a repair amendment, send to your insurer, or keep in your closing file. Starting price. Your tech confirms the final number on site before any work.

For a full walk-through of the electrical side, see home electrical inspection before buying. For what the evaluation costs and what changes the number, see electrical inspection cost.

Where foundation movement and electrical meet

The two systems are evaluated separately, but they meet at a few points worth knowing. Where the electrical service enters the house, a meter base and conduit are fastened to brick or siding. Movement in the wall can stress those fittings, and an electrician will note a separated conduit or a meter base pulling away from the wall. Inside, wall cracks near outlets and switches can leave a device loose in its box. Those are electrical findings with electrical fixes, and they also give the engineer another data point. We report what we see in our scope and refer structural questions to the engineer.

If the service equipment on the outside of the house needs attention, we cover how that work is coordinated with CPS Energy in meter loop, mast and weatherhead repair.

Scheduling the foundation inspection before buying, alongside the electrical

The Texas resale contract option period is short, and the foundation inspection before buying and the electrical inspection both need to be done with time left to negotiate. Plan it this way:

• Book the general home inspection for the first day or two of the option period.
• If the house is older or the listing mentions prior foundation work, book the electrical and the engineering evaluations at the same time rather than waiting for the general report.
• Ask your loan officer whether foundation findings will require an engineer's letter for the loan.
• Collect the written reports, then build one repair request or credit request from all of them.
• If the seller has prior foundation repair records or an earlier engineer's report, ask for them on day one.

If you are the agent, send this page to your buyer with the inspection schedule, so both specialists are booked before the general report comes back. Call us to schedule the electrical evaluation, and contact 254 Engineering for the foundation.

What you get from Wattsmith

Wattsmith Electric is veteran-owned and licensed by TDLR under TECL 41806. We do electrical work only. Every evaluation ends in a written report signed by a Texas licensed master electrician, and every correction is priced flat and approved by you before work starts. If you buy the house and want the work done, we pull the permit through the City of San Antonio Development Services Department where one is required and handle the inspection.

Book through electrical inspections, see how our flat prices work, or call us and we will tell you over the phone which parts of the inspection report need a visit before your option period ends.