Form Survey in San Antonio, TX
Also called a foundation survey or slab survey, a form survey verifies your foundation forms are placed correctly on the lot — inside the setbacks, clear of easements, and matching the approved site plan — before the concrete makes it permanent. Fast turnaround, coordinated with your pour schedule.
Form Survey Quote
Include the lot address and your pour date.
What Is a Form Survey — and Why It's Also Called a Foundation Survey
A form survey is the last checkpoint before your foundation becomes permanent. After the concrete contractor sets the foundation forms but before any concrete is poured, a surveyor locates the form corners and verifies three things: the forms sit inside the building setback lines, they don't encroach into any recorded easement, and their placement matches the approved site plan.
You'll hear this same service called a foundation survey, a slab survey, or a form check — the names vary by who's asking, but the job is identical. "Form survey" is the standard term among Texas surveyors and production builders; lenders and out-of-state buyers tend to say "foundation survey." Whichever name is on your requirement, this is the survey it means.
The economics are simple. If the forms are wrong, moving them costs the concrete crew a few hours. If the poured foundation is wrong — over a setback line, into a utility easement, or shifted off the plan — the remedies range from variance applications and lender complications to cutting out concrete. A $400 survey against that downside is why builders treat form surveys as non-negotiable.
A form survey from Alliance verifies:
Setback compliance — form corners measured against front, side, and rear building setback lines from the recorded plat and applicable zoning.
Easement clearance — confirmation that no part of the foundation footprint encroaches into utility, drainage, or access easements of record.
Placement vs. site plan — the forms' actual position compared against the approved site plan, with any deviation flagged before the pour.
Lot verification — confirmation the forms are on the correct lot. It sounds obvious; in fast-moving production subdivisions, it's a real failure mode worth ruling out.
Sealed documentation — a survey sealed by a Registered Professional Land Surveyor, ready for the builder's file, the lender's draw requirement, or municipal inspection.
The Cost of Skipping the Form Survey
Concrete doesn't forgive. Every placement error that exists in the forms becomes permanent the moment the pour finishes, and the cost of fixing it multiplies by orders of magnitude.
The most common failure we catch: forms encroaching a side setback by inches. On a 50-foot production lot with 5-foot side setbacks, there's very little margin, and a form that drifted during bracing can cross the line without anyone noticing. Caught pre-pour, the fix is a morning's work. Caught by the city inspector or a title company years later, it's an encumbrance on the property that complicates every future sale.
Same Error, Two Price Tags
Caught before the pour: the concrete crew shifts the forms, re-braces, and pours on schedule. Cost: a few hours of labor.
Caught after the pour: options are a variance application (if the city grants it), an encroachment agreement with the easement holder (if they agree), or demolition and re-pour. Cost: thousands to tens of thousands, plus schedule slip and lender complications.
The form survey exists to make sure you're always in the first scenario.
Builders, Contractors & Owners
Production Builders
High-volume subdivisions where lots move fast and setback margins are tight. Alliance runs recurring form survey programs coordinated with your pour calendar.
Custom Home Builders
One-off builds on unique lots where the site plan, setbacks, and easements deserve individual verification before the most expensive pour of the project.
Concrete Contractors
Verification that protects your work before the trucks roll. A sealed form survey documents that placement was correct when you poured.
Construction Lenders
Pre-pour verification frequently required before releasing the foundation draw. We deliver sealed documentation in the format your draw process needs.
Homeowners Building
If you're the owner on a custom build, the form survey is your independent check that the builder's foundation is going exactly where the plans say it should.
Additions & Garages
Form surveys aren't just for new homes. Additions, detached garages, casitas, and shop buildings on existing lots face the same setback and easement rules.
How a Form Survey Works — Step by Step
Forms Are Set
The concrete contractor stakes and braces the foundation forms per the site plan. That's when the form survey gets ordered — forms in place, pour not yet scheduled or scheduled a few days out. Tell us the pour date when you order and we'll confirm we can beat it.
Field Verification
Our crew locates the form corners and measures their position relative to the property boundary, the platted building setback lines, and recorded easements. If Alliance previously surveyed the lot or the subdivision, existing control speeds this up considerably.
Comparison to Plan
Measured form positions are checked against the approved site plan and plat restrictions. Any encroachment or deviation gets flagged to the builder immediately by phone — not buried in a report that arrives after the pour.
Sealed Survey Before the Pour
An RPLS reviews and seals the form survey showing the verified placement. The builder gets documentation for the file, the lender gets what the draw requires, and the pour proceeds knowing the foundation is going in the right place.
Form Surveys in the Construction Sequence
A form survey is one checkpoint in the build. These are the surveys that come before and after it.
Construction Staking
Before the forms: staking the building corners, offsets, and elevations the contractor uses to set the forms in the first place.
Building Envelope Survey
Before the design: mapping the buildable area after setbacks and easements, so the site plan puts the foundation somewhere a form survey can approve.
As-Built Survey
After construction: documenting what was actually built for final draw, closing, or municipal compliance. The bookend to the form survey.
Builders: Alliance handles the full sequence — staking, form survey, and as-built — with the same control network across all three, which eliminates the datum discrepancies that happen when different firms handle different phases. View all 29+ services →
Form Survey FAQ — San Antonio
Request Your Form Survey Quote
Forms set and pour date approaching? Alliance turns form surveys around on builder schedules — verified placement, sealed documentation, and a phone call the moment anything looks wrong. One survey now beats cutting concrete later.
Get Your Free Quote
Include the lot address and your pour date.
Form & Foundation Surveys in San Antonio — From $400
Verified before the pour. Sealed by an RPLS. Turned around on your schedule.
