Service Area

Civil Contractor in San Antonio, TX

San Antonio is building in every direction — manufacturing on the south side, military-driven development across the metro, and commercial growth pushing out along Loop 1604, I-35, TX-151, and I-10. TerraTek Civil Construction Group supports that growth from our base in San Angelo, mobilizing crews and equipment across Texas for commercial and energy-sector projects. We self-perform the civil scopes that make or break a schedule on Bexar County ground: earthwork, lime soil stabilization, commercial concrete, underground utilities, and complete turnkey site development. If you are a general contractor, developer, or energy project team with a San Antonio site sitting on Blackland clay, the ground under your project is exactly the problem we specialize in.

Based in San Angelo, TXServing all of Texas12 civil scopes under one contractCommercial & energy projects only

Why San Antonio Sites Need Lime Soil Stabilization

Much of eastern and southern Bexar County sits on the Blackland Prairie, home ground of the Houston Black clay — the soil that made expansive clay a textbook engineering problem. These are high-plasticity clays, with plasticity indexes that routinely run high enough to trigger subgrade treatment on almost any geotechnical report written in the metro. The mechanism is simple and relentless: the clay swells as it takes on moisture and shrinks as it dries, and South Texas weather delivers both extremes in the same year. Left untreated, that shrink-swell cycle heaves pavements, cracks slabs and flatwork, deflects curb lines, and works against every utility trench cut through it.

The metro is building straight across this ground. The I-35 corridor running northeast toward Schertz and New Braunfels, the commercial growth rings along the north and west sides of Loop 1604, the TX-151 corridor on the west side, and the I-10 corridor east of downtown all cross clay-dominated ground in varying degrees, with the heaviest expansive soils to the east and south. Automotive manufacturing on the south side, the military installations that anchor the metro economy, and large-format commercial, distribution, and data center development all put heavy slabs and long pavement sections on soils that move.

Lime soil stabilization is the standard remedy, and it is the scope TerraTek leads with in San Antonio. Lime treatment chemically changes the clay: spread at the specified application rate, mixed to the design depth, mellowed, remixed, moisture conditioned, compacted, and verified with density testing. Done correctly, it drops the plasticity index and hands the pavement or slab designer a subgrade that behaves. Done poorly — wrong rate, shallow mixing, skipped mellowing — the problem comes back up through the finished product a few seasons later. Start with our lime soil stabilization page for how we run the scope.

If you are early in design, the cheapest time to deal with the clay is now. A geotechnical investigation that establishes plasticity indexes, moisture contents, and treatment depths lets the civil engineer specify lime treatment where it is actually needed instead of over- or under-prescribing it — and lets a contractor price the scope from data instead of contingency. The supporting details deserve equal attention: moisture conditioning during grading, proof-rolling to expose soft spots before they get buried, and compaction verified lift by lift. A perfectly treated subgrade can still be ruined by the untested foot of fill placed on top of it.

Civil Construction Services in San Antonio

Every scope below is self-performed, and each is available as a stand-alone contract or as part of a full civil package. Each card links to a full scope page with the technical detail — what specifications typically require in Bexar County conditions, how we build the work, and how it gets verified.

What Happens When You Send Us a San Antonio Project

No mystery, no sales choreography — the same four steps on every project we price, in San Antonio or anywhere else in Texas.

STEP 1

Scope & Plan Review

We review the civil set, the project specifications, and the geotechnical report — and on San Antonio work the geotech is where we start, because the soils drive the sitework. We confirm which scopes you want priced and flag anything in the documents that will cause a problem in the field.

STEP 2

Site Walk & Questions

We walk the ground, look at access, haul routes, existing conditions, and drainage patterns, and come back with questions instead of assumptions. Anything unclear gets asked before bid day — surprises found now are line items; surprises found later are change orders.

STEP 3

Proposal Against Your Schedule

We price to your master schedule, not a generic timeline — scope by scope, with sequencing spelled out so you can see exactly how stabilization, utilities, pads, and paving land against your milestones.

STEP 4

Execution & Verified Handoff

Crews execute to plan and specification, with third-party compaction and density testing wherever the project requires it. Each scope closes out documented, so the next trade steps onto verified work instead of taking our word for it.

Through every phase, erosion and sediment control runs in parallel with the production work — SWPPP measures installed before disturbance, inspected on the required cadence, and maintained through final stabilization. A stormwater violation can stall a San Antonio project as effectively as any ground problem, and it is entirely avoidable.

San Antonio Civil Construction FAQ

The questions general contractors and developers actually ask before sending us a San Antonio bid package.

Do you really cover San Antonio from San Angelo?

Yes. TerraTek is based in San Angelo and built to work statewide — mobilizing crews and equipment to commercial and energy projects across Texas is how the company operates, not an exception we make. San Antonio is a market we actively pursue because the work matches what we do best: expansive clay sitework, commercial concrete, and full civil packages for a metro that keeps building. When a project fits our scope, we mobilize the people and iron it needs for the duration of the contract, and the logistics of getting there are our problem to solve, not yours. We also keep the relationship simple: one estimator through bid day, one point of contact through construction, so a question asked in Bexar County never disappears into a home-office queue. The practical question is never where a contractor keeps its office — it is whether the crew on your site understands the ground under it and can hold your schedule. Send us the plans and we will tell you plainly whether the project is a fit.

How serious is expansive clay movement on San Antonio sites?

Serious enough that it should shape the civil budget from day one. The Houston Black clay and related Blackland Prairie soils across eastern and southern Bexar County are among the most expansive soils in the country, and their shrink-swell movement will eventually find any shortcut taken during sitework — under pavements, slabs, sidewalks, and utility trenches alike. Your geotechnical report is the controlling document: if it shows high plasticity indexes and recommends lime treatment, that recommendation deserves a contractor who treats the details as non-negotiable — application rate, mixing depth, mellowing period, moisture conditioning, compaction, and density verification, every pass. If your structural engineer is leaning on stiffened slabs or deepened grade beams because of the soils, well-executed subgrade treatment is what lets those measures work as designed instead of fighting the ground alone. Stabilization failures rarely show up at substantial completion; they show up seasons later as heaved paving and cracked flatwork, long after a low-bid treatment pass was paid for and forgotten. We price the scope the geotech actually calls for and build it so the testing lab can verify every lift.

Can we hire you for a single scope, or only a full package?

Either one. Plenty of general contractors bring us in for a single scope — lime stabilization ahead of their own paving sub, the wet utility package, or concrete paving alone. Others hand us the entire civil program as a turnkey site development contract that runs from clearing through final paving. The advantage of the full package on a San Antonio clay site is accountability: when the same contractor grades the site, treats the subgrade, cuts the trenches, and places the paving, there is no seam between scopes for a subgrade problem to hide in — and no finger-pointing when a question comes up. But we bid single scopes on their own merits and are glad to slot into the team you already have. If you are still deciding how to break out the sitework, send the plans anyway — we will price it both ways so you can compare a packaged number against the sum of the parts.

Do you handle the kind of commercial and industrial work San Antonio is building?

That is exactly the work we target. TerraTek serves commercial and energy clients only — general contractors, developers, and energy project teams — and San Antonio metro construction lines up squarely with that focus: manufacturing and supplier facilities on the south side, distribution and industrial buildings along the interstate corridors, retail and mixed-use development around Loop 1604, and the commercial growth that follows the military installations anchoring the metro economy. Our scopes cover the civil side of all of it: building pads, mass grading, utilities, paving, and SWPPP-driven erosion and drainage control. Energy-sector teams building in or through the region are covered too — see energy infrastructure and the full industries we serve. We do not take residential work, which means your commercial project is never competing with a subdivision for our crews.

How does mobilization to a San Antonio project work?

Once a contract is signed, we plan mobilization around your schedule: crews, equipment, and materials sequenced so the site is productive from the first day on the ground, not the first week. The details — what iron comes, when it arrives, how crews are rotated, and how the scope is sequenced against your milestones — are spelled out in the proposal so there are no assumptions on either side of the table. Statewide mobilization is normal operating procedure for us rather than a stretch, so a Bexar County project is planned the same way we plan any Texas project: against the master schedule, with logistics priced in up front instead of discovered later as extras. For multi-phase work, demobilization and remobilization between phases get planned the same way, so you are not carrying idle equipment on site between scopes. If your schedule has a hard start date, put it in the bid invitation and we will confirm whether we can commit to it before you award anything.

What should we include in a bid invitation?

Four things get you an accurate number quickly: the civil plan set, the project specifications, the geotechnical report, and your bid date. The geotech matters more in San Antonio than almost anywhere else in Texas — plasticity indexes and treatment recommendations drive the stabilization scope, and a stabilization bid built without them is a guess dressed up as a price. Schedule milestones help too: if we know when the pad has to turn over or when paving has to be down, we can price the sequencing honestly instead of padding it. Send whatever you have through our contact page; if the geotech is not finished yet, send the rest, note that it is coming, and we will qualify the proposal accordingly and true it up when the report lands.

Have a San Antonio Project Coming Up?

Send us the plans, the geotech, and your bid date, and we will come back with a straight answer on scope, schedule, and fit. One contractor, twelve civil scopes, and a working understanding of what Bexar County clay does to a site that was built over it carelessly.

Submit a Project for Review

Nearby Service Areas

TerraTek serves commercial and energy projects across Texas. Explore our other service areas: