Earthwork & underground utility experts.
Reliable underground infrastructure delivered safely, on time, and to specification: fire lines, storm drainage, exterior utilities and earthwork for commercial sites across Greater Houston.
- Fire lines
- Underground utilities
- Storm drainage
- Earthwork & grading
- Site development
Exterior utilities, self-performed.
We specialize exclusively in commercial exterior work: fire lines, storm drainage, water & sewer, earthwork and site development. Licensed crews, scheduling discipline and an OSHA-aligned safety culture, with hands-on accountability from estimate to closeout.
Enterprise infrastructure solutions.
Licensed specialists in fire line installation and plumbing for commercial exterior projects. We provide comprehensive underground utility solutions exclusively for exterior commercial applications.
Fire Line Installation
Licensed fire line installation and plumbing for commercial exterior projects, complete fire protection from planning to commissioning and maintenance.
Storm Drainage
Expert storm water management systems, complete solutions from catch basins to outfall structures and maintenance.
Exterior Utilities
Comprehensive exterior commercial utilities including site preparation, water & sewer, storm drainage, demolition and site clearing & earthwork.
Site Development
Complete site development and infrastructure, excavation & grading, utility trenching, concrete work and site restoration through final connections.
From estimate to certified, restored site.
Estimate
Scope the work and coordinate with your schedule and site logistics.
Excavate
Clear, excavate and grade the site safely to line and grade.
Install
Set fire lines, utilities and storm systems to specification.
Test & restore
Test, certify, restore the site and hand off clean.
The right team for your project type.
The same licensed crews, scheduling discipline and safety culture, whatever your stake in the job.
Commercial developers & general contractors.
Retail, office and industrial sites: earthwork, exterior utilities and fire lines coordinated with your schedule and site logistics.
Experience you can trust.
Safety first
OSHA-aligned safety culture with a zero-accident record, every crew, every site, every day.
Two decades of commercial-exterior focus
Since 2007 we’ve specialized exclusively in commercial exterior projects, fire line, storm drainage, utilities and earthwork, building a reputation for delivering on time and to spec.
Safety is how we stay in business
An OSHA-aligned safety culture and a zero-accident record, supported by C3 craft training and third-party safety compliance oversight.
A track record you can build on.
in Greater Houston
commercial & industrial
delivered on time
up to $15M scale
"They coordinated the fire line and storm work around our schedule and delivered on time. Clean site, no surprises."
Certified, qualified and accountable.
OSHA-aligned
SafetyOSHA-aligned safety culture with a zero-accident record.
ConnectCSC Safety
SafetyThird-party safety compliance oversight.
ConnectC3 Partner
TrainingConstruction Career Collaborative craft training.
ConnectMaster Plumber
LicenseMaster Plumber-licensed fire line professionals.
ConnectBonded
SuretyBonded contractor for commercial work.
ConnectInsured
InsuranceFully licensed and insured, 100%.
ConnectQuotes the team came across this quarter.
They handle the exterior utilities and fire lines and we stop worrying about it. Grade is right, tests pass, and the schedule holds.
Delivered across Greater Houston.
Fire line · utilitiesHouston Methodist Sugar LandExterior utilities for a healthcare campus.
Storm · earthworkCCISD Challenger Columbia StadiumSite utilities and storm for an athletic facility.
Fire line · stormBuffalo Heights DevelopmentExterior utilities for a mixed-use development.
Exterior utilitiesMemorial Hermann The WoodlandsUtility work around an active medical campus.
Site · utilitiesGateway RTIC Retail StoreSite prep and utilities for a retail build.
Fire line · stormHISD Booker T. Washington HSFire line and drainage for a school campus.
Built to clear the bar before procurement asks.
Master Plumber-licensed specialists.
Bonded commercial contractor.
100% licensed and insured.
OSHA-aligned, zero-accident record.
The basics, answered.
What does S. Thomas Construction do?
We specialize in commercial exterior underground infrastructure across Greater Houston, fire line installation, storm drainage, exterior water & sewer utilities, earthwork & grading, demolition and site development.
Are you licensed for fire line installation?
Yes. Our fire line and plumbing work is performed by Master Plumber-licensed professionals, including hydrant systems, backflow prevention, and system testing & certification.
What size projects do you take on?
We specialize in mid to large-scale commercial exterior projects, generally ranging from about $200K to $15 million, including multi-phase developments.
What types of clients do you work with?
Commercial developers and general contractors, plus education, healthcare and public-sector facilities where coordination, documentation and compliance expectations run high.
What areas do you serve?
We serve the Greater Houston metro area from our office in Magnolia, TX. Reach out with your location and scope and we’ll confirm coverage.
How do I start a project?
Send us your plans or a short description through our contact page, or call (281) 259-0727. Our estimating team will follow up to scope the work and provide a proposal.
Plan your next site with confidence.
We partner with owners and builders across Greater Houston to deliver licensed earthwork and exterior utilities with hands-on accountability.