Keystone Concrete
Keystone Concrete Placement is a privately held Texas concrete subcontractor delivering structural, commercial, and residential concrete placement plus landscaping and sitework services to general contractors across Houston, Austin, San Antonio, and College Station.
- Company typePrivate
- Founded1994
- HeadquartersHouston, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Keystone Concrete does
Keystone Concrete Placement is a privately held, family-owned Texas commercial concrete construction subcontractor delivering turnkey concrete placement across three core divisions — Structural (high-rise and vertical construction), Commercial (tilt-wall, office, industrial, and distribution facilities), and Residential (foundations and flatwork) — supported by two ancillary divisions: Keyscape (commercial landscaping, irrigation, hardscape, erosion control) and Sitework & Utilities (earthwork, paving, utilities, detention). Operating from four Texas offices in Houston (headquarters), Georgetown (Austin), Bryan (College Station), and Schertz (San Antonio), the company employs 1,500+ skilled craftsmen placing 975,000+ cubic yards of concrete annually using a self-owned equipment fleet that includes placing booms, high-pressure trailer and truck-mounted concrete pumps, ACPA-certified pump operators, Liebherr tower cranes, multiple hydraulic self-jacking formwork systems, and over one million square feet of structural shoring formwork. Differentiation rests on self-performed equipment ownership, specialized self-consolidating concrete mix designs for exposed architectural finishes, and OSHA partnership enrollment at the Houston division.
Keystone's revenue is generated through lump-sum project contracts with general contractors, developers, and property owners, with disclosed individual contract values ranging from roughly $2.9M (Texas Outdoor Power tilt-up) to $41.2M (Amazon Distribution Center, San Antonio). Go-to-market is relationship-driven and sales-led: dedicated project teams engage GCs from preconstruction through completion, with emphasis on proactive estimating, constructability input, and collaborative problem-solving. The customer base is diversified across major Texas general contractors including Level 10 Construction, Bartlett Cocke, Joeris, Flintco, Ryan Companies, Skanska, Turner Construction, Trammel Crow Residential, W.G. Yates & Sons, Hanover Company, and others; end-clients span healthcare (HCA Methodist), residential high-rise (44 East, Vantage Post Oak, 5th and Brazos, Alexan Waterloo, Driscoll), distribution/logistics (Amazon), banking (Texas Bankers Association), and commercial office (Broadway Office Building, Majestic Austin). The company asserts it has never missed a project schedule, with multiple high-rise projects completed ahead of schedule, including 44 East during COVID-19 disruption and Alexan Waterloo one month ahead.
The business operates as a DBA of Stewart Builders, Inc., part of the Stewart Holdings Company family of companies that includes affiliated entities such as Stewart Development and Stewart Builders. There is no evidence of venture capital, private equity, or public ownership; ownership and management remain within the Stewart family. Pricing is bid-based and not publicly disclosed; contracts are tendered and awarded per project rather than under long-term master agreements. Operating geographies are restricted to four Texas markets, and there is no claimed global footprint. Subsidiaries — Keyscape and Sitework & Utilities — operate as wholly owned internal divisions rather than independently capitalized entities, with cross-selling enabled by shared equipment yards and unified safety/OSHA 10 / silica-training programs.
Keystone Concrete firmographics
Firmographics- Name
- Keystone Concrete
- Legal name
- Stewart Builders, Inc.
- Website
- https://keystoneconcrete.com
- Company type
- Private
- Founded year
- 1994
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Keystone Concrete Placement is a privately held Texas concrete subcontractor delivering structural, commercial, and residential concrete placement plus landscaping and sitework services to general contractors across Houston, Austin, San Antonio, and College Station.
- Ownership category
- akta.pro rank
Where Keystone Concrete is headquartered
LocationHeadquarters
- HQ city
- Houston
- HQ country
- United States
- HQ region
- North America
Offices4 records
Markets served
Keystone Concrete business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales
Revenue model
- Concrete Construction Services: Project-based revenue from structural, commercial, and residential concrete placement services. Revenue earned through lump-sum contracts for specific construction projects with contract values ranging from millions to tens of millions per project.
- Keyscape Commercial Landscaping: Turnkey commercial landscape contractor services including landscape, irrigation, hardscape, and erosion control solutions with full-service maintenance department.
- Sitework & Utilities: Site preparation, earthwork, asphalt paving, base paving, utilities, and detention pond services for commercial projects.
Go-to-market motion2 records
Distribution channels2 records
Marketing channels4 records
Keystone Concrete product offering
Product offeringCore offering
Keystone Concrete is a turnkey commercial concrete construction company that places structural, commercial, and residential concrete for general contractors and developers. The company self-performs work using its own equipment fleet (placing booms, concrete pumps, tower cranes, self-jacking formwork) and additionally delivers related commercial landscaping (Keyscape) and sitework/utilities services across the Houston, Austin, San Antonio, and College Station markets in Texas.
Product overview
Keystone Concrete is a family-owned concrete construction company offering turn-key concrete placement services through three primary divisions: Structural (elevated/high-rise concrete for vertical construction), Commercial (tilt-up, office, industrial, and distribution facilities), and Residential (foundations and flatwork for homes and communities). The company operates alongside two supporting divisions: Keyscape (commercial landscaping, irrigation, hardscape, and erosion control) and Sitework & Utilities (site preparation, earthwork, utilities installation, and paving). All divisions share resources including an in-house equipment fleet (placing booms, concrete pumps, tower cranes), material yards at each location, and a unified safety program. With 30+ years of experience, 1,500+ skilled craftsmen, and 975,000+ cubic yards poured annually across Houston, Austin, San Antonio, and College Station, the company positions itself as a comprehensive construction partner integrating concrete, landscape, and sitework services for streamlined project delivery.
Differentiator
Problem solved
Functional benefit
Products and services
- Keystone Concrete Placement Turnkey concrete placement services for structural, commercial, and residential projects, supported by an in-house equipment fleet including placing booms, concrete pumps, tower cranes, and self-jacking formwork. Sold to general contractors, developers, and property owners across Texas.
- Structural Division Elevated and high-rise concrete construction services for vertical projects including office towers, residential high-rises, hospitals, and complex structural work. Capabilities include placing booms, hydraulic self-jacking formwork, tower cranes, and over 1 million square feet of structural shoring formwork.
- Commercial Division
- Residential Division
- Keyscape Commercial Landscaping
- Sitework & Utilities Division
Quantifiable outcome
- Never missed schedule, most projects finished early
- +4 more outcomes
Companies that use Keystone Concrete
Customer profileNamed customers9 records
Segments5 records
Ideal customer profiles2 records
Keystone Concrete technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Keystone Concrete partnerships and signals
Strategic signalPartnerships
43 partnerships are on record, tiered core and minor.
- Harvey ClearycoreGeneral contractor partner for Keyscape commercial landscaping projects in Greater Houston and Austin markets
- VaughncoreGeneral contractor partner appearing in both Keyscape and Sitework division partner lists
- EE ReedcoreGeneral contractor partner for commercial construction projects
- TellepsencoreGeneral contractor partner for commercial construction projects
- Burton ConstructioncoreGeneral contractor partner for commercial construction projects
- ForneycoreGeneral contractor partner for commercial construction projects
- Ryan CompaniescoreGeneral contractor partner with multiple disclosed projects including 5th and Brazos high-rise
- Bartlett CockecoreGeneral contractor partner with testimonial endorsement from President Kevin Byrd
- JoeriscoreGeneral contractor partner for Broadway Office Building project ($22.4M contract)
- FlintcocoreGeneral contractor partner for 44 East Avenue 49-story condo project
- SpawglasscoreGeneral contractor partner for commercial construction projects
- KDWcoreGeneral contractor partner for commercial construction projects
- Stewart BuilderscoreAffiliate company within Stewart Holdings family of companies
- AnglerminorGeneral contractor partner for commercial construction projects
- TallycoreArchitecture firm partner for Keyscape projects
- Clark CondoncoreLandscape architecture firm partner
- Ed WongminorArchitecture firm partner
- Asakura RobinsoncoreLandscape architecture and urban design firm partner
- Kudela & WeinheimerminorArchitecture and landscape architecture firm partner
- OJBcoreLandscape architecture firm partner
- TBGcoreLandscape architecture firm partner
- HinescoreReal estate developer partner with large portfolio of commercial properties
- Stewart DevelopmentcoreAffiliate developer within Stewart Holdings family of companies
- BrookfieldcoreMajor real estate developer and investment firm partner
- Stream RealtycoreCommercial real estate services firm partner
- TranswesterncoreCommercial real estate services firm partner
- Austin CommercialcoreGeneral contractor partner for sitework division projects
- Turner ConstructioncoreMajor national general contractor partner for sitework projects
- Corvus ConstructionminorGeneral contractor partner for sitework projects
- Arco Design/BuildcoreDesign-build general contractor partner for sitework division
- Joeris General ContractorscoreGC for Broadway Office Building - two mid-rise class A office towers with cast-in-place parking garage, $22.4M project value
- SkanskacoreGC for HCA Methodist Expansion - major hospital expansion project including central tower, children's tower vertical expansion, NICU expansion, and parking garage, $26.3M contract value
- BeckcoreGC for Texas Bankers Association project - exposed concrete bank vault-inspired building, 125-foot structure height, $7.85M project value
- FlintcocoreGC for 44 East Avenue - 49-story Austin condominium, completed ahead of schedule despite COVID-19, $27.8M project value
- Ryan CompaniescoreGC for 5th and Brazos - 355-foot high-rise with 50-foot basement, described as 'one of the most dimensionally accurate buildings' surveyed, $24.6M project value
- Ludlow & AssociatescoreGC for Vantage Post Oak - high-rise project, $30.4M contract value, 1.1M+ sq ft
- Trammel Crow ResidentialcoreGC for The Alexan Waterloo - 351-foot residential high-rise completed one month ahead of schedule, $18.9M project value
- Headwater ConstructioncoreGC for Texas Outdoor Power - single story tilt-up, 11,396 cubic yards of concrete, $2.985M contract value
- W.G. Yates & Sons Construction CompanycoreGC for Amazon Distribution Center San Antonio - multi-floor distribution center with high tolerance floors for robotic fulfillment, $41.2M contract value
- Zapalac Reed Construction CompanycoreGC for Hays Commerce Center - tilt wall complex, 357,198 sq ft flatwork, $5.2M total project value
- HarveycoreGC for Anadarko Towers - completed 2014, $30.5M contract value, 1.3M+ sq ft
- Hanover CompanycoreGC for Driscoll Apartments - Houston project, $23.7M contract value, 898,611 sq ft
- Commerce ConstructioncoreGC for Majestic Austin - three-building tilt-up complex, 327,502 sq ft concrete, 698,567 sq ft paving, $5.6M project value
Scale indicators6 records
Recent moves5 records
Expansion highlights5 records
Keystone Concrete competitors and assessment
Company assessmentDirect peers
- Baker Concrete Construction: Baker Concrete is the largest concrete subcontractor in the United States, providing structural and architectural concrete placement services for commercial, institutional, and industrial projects nationwide. It is the most direct large-scale competitor to Keystone's structural and commercial concrete model.
- Lithko Contracting: Lithko Contracting is a national poured concrete wall and foundation subcontractor with significant Texas presence, serving commercial, industrial, and multi-family markets with self-performing crews and owned formwork systems — closely mirroring Keystone's structural concrete delivery model.
- TAS Commercial Concrete: TAS Commercial Concrete is a Texas-based structural and commercial concrete subcontractor serving high-rise, office, healthcare, and mixed-use projects. It directly competes with Keystone for major GC-driven structural concrete work in Texas metros.
- Suntec Concrete: Suntec Concrete is a Texas-based commercial concrete subcontractor providing structural concrete, flatwork, and site concrete services for office, retail, healthcare, and educational facilities — overlapping with Keystone's commercial and structural divisions in the same regional markets.
- Concrete Strategies: Concrete Strategies is a national commercial concrete subcontractor delivering cast-in-place structural concrete, architectural concrete, and site concrete for complex commercial projects. Its self-perform model and emphasis on quality structural finishes parallels Keystone's positioning.
- Webcor: Webcor is a California-based builder with strong self-perform concrete capabilities serving high-rise, commercial, and institutional projects. While geographically focused on the West Coast, its integrated concrete and construction model is directly comparable to Keystone's turnkey approach.
Broad incumbents
- Tellepsen: Tellepsen is a long-established Houston-based general contractor and construction services provider with deep Texas roots across commercial, healthcare, and industrial projects. It competes with Keystone's integrated delivery at the GC level and is a peer GC partner within the same Houston market ecosystem.
- Manhattan Construction Group: Manhattan Construction Group is a diversified construction services firm with major Texas operations delivering commercial, sports, healthcare, and institutional projects. As a larger incumbent with self-perform capabilities, it represents broader competitive overlap with Keystone's integrated turnkey positioning.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Keystone Concrete financial estimates
Financial estimateRevenue estimate
Valuation estimate
Keystone Concrete leadership team
Management profileNumber of profiles
Keystone Concrete subsidiaries and ownership
Company hierarchySubsidiaries2 records
Keystone Concrete funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Keystone Concrete M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Keystone Concrete
What does Keystone Concrete do?
Keystone Concrete is a turnkey commercial concrete construction company that places structural, commercial, and residential concrete for general contractors and developers. The company self-performs work using its own equipment fleet (placing booms, concrete pumps, tower cranes, self-jacking formwork) and additionally delivers related commercial landscaping (Keyscape) and sitework/utilities services across the Houston, Austin, San Antonio, and College Station markets in Texas.
Is Keystone Concrete a public or private company?
Keystone Concrete is a private company. It is classified as family owned and is currently operating.
When was Keystone Concrete founded?
Keystone Concrete was founded in 1994. It employs 11 to 50 people.
Where is Keystone Concrete based?
Keystone Concrete is headquartered in Houston, United States, in the North America region.
How does Keystone Concrete make money?
Three revenue lines are on record. Concrete Construction Services are the primary driver. The others are keyscape Commercial Landscaping and sitework & Utilities.
Who are Keystone Concrete's main competitors?
Direct peers on record are Baker Concrete Construction, Lithko Contracting, TAS Commercial Concrete, Suntec Concrete, Concrete Strategies and Webcor. Broad incumbents are Tellepsen and Manhattan Construction Group.
Does Keystone Concrete have an API?
No public API is recorded for Keystone Concrete.