On-Site Foundation Evaluation in San Antonio, TX

What Is a Foundation Evaluation?

A foundation evaluation - sometimes called a foundation inspection - is an on-site assessment that answers one question: what is the measurable condition of this foundation right now. It is not a sales visit with a predetermined conclusion. It is a visual structural survey combined with elevation measurement, producing a documented profile you keep regardless of what you decide to do next.

San Antonio Foundation Repair performs residential foundation evaluations across San Antonio and 18 surrounding communities as of 2026. Whether the answer turns out to be slab repair, pier-and-beam work, drainage correction, crack repair, or monitoring alone, it starts here. Every foundation repair service we provide in San Antonio begins with this measurement step rather than with a proposed scope.

Who Performs the Assessment and How Long It Takes

One of our evaluators attends. You or someone who can open the house and speak about the property should be present, because interior access to every room is needed and because the conversation matters. Most visits run one to two hours, longer on larger homes or where crawlspace inspection adds time. If the findings suggest a structural engineer is needed, we will tell you and can coordinate a referral to a Texas licensed professional engineer.

What the Evaluation Examines

Exterior observations

We start outside because the site tells you a great deal before you look at a single crack.

• Grading and fall away from the foundation on every elevation.
• Downspout discharge points and whether roof water is being carried away or dropped at the slab edge.
• Irrigation placement, standing water, and evidence of erosion.
• Brick and mortar cracking, including stair-step patterns, with crack mapping and documentation of location and width.
• Separation at window and door frames, at the slab edge, and at any addition junction.
• Tree proximity and root direction relative to the perimeter.

Interior observations

• Door and window operation, checked room by room rather than assumed from one example.
• Interior cracking at wall and ceiling junctions, above openings, and at corners.
• Separation at trim and baseboards.
• Any visible floor covering distress that tracks with a slope.

Floor slope measurements

Floor slope measurements are taken across the entire plan with a digital manometer, which establishes relative elevation between points to a fine tolerance. The readings are plotted onto an elevation floor plan so the shape of the floor is visible as a contour.

This is the part that distinguishes a measured evaluation from a walkthrough. The profile answers three things a visual inspection cannot: how much differential exists, where the low and high points are, and what shape the movement has. A perimeter that has dropped, a center that has risen, and a single corner that has settled are three different situations with three different repair implications.

Crawlspace inspection

Where the home is pier-and-beam - common in older San Antonio neighborhoods such as Alamo Heights, Monte Vista, and parts of Helotes - we inspect beneath the floor: pier condition and settlement, girder bearing points, subfloor joists, sill plate condition, standing water or damp soil, vapor barrier presence, and clearance. Findings are recorded by location.

Site and moisture factors

Soil moisture variation around the perimeter, site drainage assessment, and any plumbing leak indicators are recorded. Moisture is the mechanism behind most expansive clay movement across San Antonio and Bexar County, particularly in areas with Houston Black or Heiden clay soils near the Balcones Escarpment. Its distribution is part of the finding rather than background.

Foundation movement history

We ask what you have noticed, when it started, whether it has changed, and whether anything has been done before. Previous foundation repair records, where they exist, are reviewed. Existing piers mean part of the structure is supported differently, and reading a profile without knowing that produces the wrong conclusion.

What You Receive After the Visit

• A findings summary. What was observed, what was measured, and what it indicates.
• An elevation floor plan. Where the survey warrants it, the plotted contour of the floor. This is your baseline benchmark for any future comparison.
• A recommendation. Either a proposed repair scope with inclusions, exclusions, schedule, and warranty terms, or a monitoring recommendation setting out what to document and when to re-check.
• A clear statement of limits. Where a question falls outside what a contractor evaluation can establish, the findings say so and point to an engineering assessment.

You keep all of it. Take it to an engineer, a buyer, or a competing contractor if you want to. Documentation that only makes sense if you hire the company that produced it is not documentation. If you are weighing several proposals side by side, our free quote-comparison worksheet sets out the fields worth aligning first.

Repair vs. Monitoring Recommendations

Not every evaluation ends in a repair proposal, and a service that only ever produces one outcome is not really evaluating anything.

Monitoring is the honest recommendation when the measured deflection sits below a reasoned threshold, when observations are stable rather than progressing, or when the cause is uncertain and a season of data would resolve it. In those cases we explain what to document: crack ends marked and dated, photographs with a scale reference, notes on door operation, and a re-check interval. Repeat elevation monitoring against the original survey then answers the question with evidence rather than guesswork.

Repair is recommended when the profile shows meaningful differential settlement, when observations are progressing, or when a structural condition warrants intervention on its own terms. In complex cases where the cause of movement remains unclear, forensic engineering methods - such as soil testing or plumbing isolation - can help narrow it before committing to a repair approach.

Contractor Evaluation vs. Engineering Assessment

This distinction matters and it is routinely blurred in this industry, so here it is plainly.

	Contractor evaluation	Engineering assessment
Who performs it	A foundation repair contractor	A Texas licensed professional engineer
What it produces	Observed conditions, measurements, proposed scope	An independent professional opinion, sometimes sealed
Seal	Not applicable	A P.E. seal may be applied where required
Typical use	Basis for a repair quote	Permits, consequential structural conclusions, third-party opinion
Commercial interest	The contractor may perform the work	Independent of the repair

A contractor evaluation is genuinely useful and it is what most situations call for. But it is not an engineering opinion and we will not present it as one. Where a permit requires a sealed design, where a structural conclusion carries real consequence, or where you simply want an opinion from someone with no interest in the repair, an engineer is the right call. The SA Foundation Repair team will tell you when that is the case and coordinate a referral where appropriate.

When to Schedule a Foundation Evaluation

• Cracks that are widening, or new cracks appearing.
• Doors or windows that have progressively worsened rather than shifting with the season.
• Floors that slope noticeably or feel uneven.
• Before listing a home, so the answer is documented on your timeline.
• Before buying, particularly where previous foundation work is disclosed.
• After a significant drought or an unusually wet season, where you want a measured baseline.

If you are not sure whether what you are seeing is worth a visit, describe it when you request a quote. We evaluate homes across San Antonio, Converse, Schertz, Live Oak, Helotes, and surrounding communities in Bexar, Guadalupe, and Comal counties. We will tell you honestly whether it warrants an evaluation now or whether documenting it for a season is the better use of your time.