Full-Service Commercial Construction for Southern Maryland
Great Mills Trading Post (GMTP) has been a full-service commercial construction firm serving Southern Maryland since 1970. Based in St. Mary's County, we take on projects from pre-construction planning through post-construction warranty, giving clients a single point of accountability at every phase.
Our capabilities span 12 service lines covering site work, civil, utility, and building services — meaning one experienced contractor handles every phase and reduces the coordination risk that comes with managing multiple subcontractors. Explore the full service list below, then contact us to discuss your project.
Our Services
From ground clearing to finished roadways, GMTP delivers every phase of commercial site work under one contract.
DEMOLITION
Safe, controlled removal of structures and site materials in preparation for new construction.
PAVING
Asphalt and surface paving for parking lots, driveways, and access roads built to last.
CONCRETE
Flatwork, curbing, and structural concrete placed to specification on schedule.
STORM DRAIN
Installation and repair of storm drain infrastructure for site and roadway runoff management.
STORMWATER MANAGEMENT
Engineered systems that capture, convey, and control stormwater in compliance with Maryland regulations.
WATER & SEWER
Water main and sanitary sewer installation for commercial and municipal projects.
EXCAVATING
Precision earthwork, grading, and mass excavation for building pads, roads, and utilities.
SEDIMENT CONTROL
Best-management practices and physical controls that keep sites in environmental compliance throughout construction.
BUILDING SERVICES
Site preparation and support services tied to commercial building programs.
ROADWAYS
Private and commercial road construction from subgrade through finished surface.
HIGHWAY CONSTRUCTION
Public highway and DOT-standard roadway projects requiring rigorous plan conformance and safety management.
UTILITY CONSTRUCTION
Underground utility installation including conduit, piping, and related infrastructure for commercial developments.
Why Clients Choose GMTP
Beyond quality construction, GMTP delivers the management, documentation, and environmental stewardship that protect your investment from groundbreaking through final sign-off.
• COST CONTROL
• SCHEDULE COMPLIANCE
• INTERPRETING DESIGN AND CONSTRUCTION
• FINAL AS BUILT DESIGN & CALCULATIONS
• ALL SEDIMENT AND CONTROL MEASURES
• PROJECT RELATED SEDIMENT & CONTROL MEASURES
• PROJECT RELATED ENVIRONMENTAL FEATURES (including protection of wetland, flood plains ... etc.)
Frequently Asked Questions
Quick answers to common questions about working with GMTP on a commercial construction project in Southern Maryland.
What types of projects does GMTP take on?
GMTP handles commercial site work, roadway construction, utility installation, and related civil projects throughout Southern Maryland. We do not take on single-family residential work — our focus is entirely on commercial and municipal clients.What geographic area do you serve?
We primarily serve Southern Maryland (St. Mary's County, Charles County and Lower Calvert County), with a strong project history in St. Mary's County spanning more than 35 years. Our local presence reduces mobilization costs and keeps projects on budget and on schedule.
Does GMTP offer a post-construction warranty?
Yes. Every project is backed by a post-construction warranty. Contact GMTP directly to discuss specific warranty terms for your project type.Can GMTP handle both design-phase planning and construction?
GMTP participates in the pre-construction phase through a formal value-engineering process and provides final as-built design and calculations at project close, covering the full project lifecycle.How does GMTP manage environmental compliance on-site?
GMTP implements all required sediment and erosion control measures and protects environmentally sensitive features including wetlands and flood plains throughout construction.How do I get a cost estimate for my project?
Contact the GMTP team by phone at (301) 994-0300 or through the contact page. Early engagement during the design phase typically yields the best value-engineering outcomes.
Ready to Start Your Project?
Great Mills Trading Post has been delivering quality commercial construction in Southern Maryland since 1970. Call us today or use our contact form to discuss your project requirements — we stay on budget and on time.