Great Mills Trading Post Co., Inc. established in 1970, provides construction services throughout Southern Maryland. The Company offers demolition, concrete paving, storm drainage, driveway work, & utility installation and so much more.

GMTP is a commercial building services business built on hard work with a reputation built on quality. 

When it comes to your next project, you want a contractor with the history and expertise to meet your needs at every stage, from the pre-construction planning phase to the postconstruction warranty. Our reputation is the foundation of our success, and we value the long-standing relationships we maintain with our clients. Contact us today for more information about our quality building solutions, backed by a warranty you can trust.

Great local references | Satisfaction guaranteed.
Contact us anytime for a free consultation and estimate!



During every phase of the design, our team will provide innovative constructability and value engineering ideas through a formal process. This process will be led by our certified facilitator. Each suggestion will be provided to the team and evaluated to decide whether to further advance the idea.

Advancing a suggestion may result in the need for cost estimating, value analysis or exploring a design for feasibility. In order to accomplish this, we utilize the Decision Analysis and Resolution Team (DART) tracking. The DART matrix organizes and quantifies innovations developed during design to help the team evaluate the overall change.

Each innovation is evaluated based on impacts to design, construction, schedule, the client and overall project goals and weighted scores are entered for each category. This allows the team to make informed decisions for every value engineered or innovative idea.

Because we're a local, Southern MD firm having worked projects in St. Mary’s County for the past 35 years, we are able to reduce the cost of construction and maximize value for our clients.  WE STAY ON BUDGET AND ON TIME!



1970 Great Mills Trading Post

Began as a company that bought and sold used furniture 


Began buying and selling used construction equipment

1985 Great Mills Construction Company

Categorized as a grading company in Asphalt & Concrete.

1987 Companies were combined

The two companies were combined into the Great Mills Trading Post as we know it today as a General Contractor in the construction industry. 

More Sister Companies Created...

AAA Materials - is a residential and commercial materials company located on St. Andrews Church Rd in Leonardtown MD.   (Learn More About this division)

Winward Homes - is the residential homes and home improvement company for GMTP.  (Learn More About this division)

Great Mills Trading Post Online Auction and Sales- Online auction and sales of construction equipment, vehicles and more. (Learn More About this division)