The commercial construction industry in Maryland is renowned for its diverse portfolio that encompasses numerous market sectors. These markets range from healthcare and education to commercial, government, and residential projects. The industry's most successful commercial construction companies offer a multitude of specialized services, such as pre-construction, general contracting, design-build, construction management at risk, shotcrete, 3D modeling, and sustainability services. The industry is also keen on safety and community service, with many companies supporting various charitable organizations. As Maryland continues to expand and develop, these construction companies are poised to facilitate its growth with their innovative designs and construction methodologies.


Top 21 commercial construction companies in Maryland

1. Miller & Long Co., Inc

Miller & Long Co. Inc. is a construction company specializing in structural concrete construction. With over 75 years of experience, they have completed over $8 billion in concrete construction projects. They offer a range of services including concrete finishing, shotcrete, 3D modeling, and expanded BIM capabilities. They are committed to safety and have a culture of caring for their workers. Their customers trust them to build high-quality structures. They also participate in community service projects and support charitable organizations.


2. Grunley Construction Company, Inc.

  • Website: grunley.com
  • Headquarters: Rockville, Maryland, United States
  • Founded: 1988
  • Headcount: 201-500
  • LinkedIn

Grunley Construction Company, Inc. is a full-service general contractor specializing in commercial, institutional, and government building construction. They offer pre-construction, general contracting, design-build, construction management at risk, and sustainability services. With a focus on self-performed work, Grunley has a portfolio of projects in various industries. Their expertise, community service, and numerous awards demonstrate their commitment to excellence. Contact Grunley for subcontracting opportunities or to learn more about their services.


3. Harkins Builders, Inc.

Harkins Builders is a construction company specializing in commercial, government, and multifamily projects. With a focus on integrity, service, and community, Harkins offers unique building experiences and adds value to every project. The company has recently expanded in the Central Virginia/Tidewater region, establishing a presence in this growing corridor.


4. American Mechanical Services

  • Website: amsofusa.com
  • Headquarters: Laurel, Maryland, United States
  • Founded: 1997
  • Headcount: 501-1000
  • LinkedIn

American Mechanical Services (AMS) is a privately owned family of companies providing primarily commercial heating, ventilation, and air conditioning (HVAC) service and construction work in various locations across the country. With over 30 years of experience, AMS specializes in high-quality HVAC maintenance and services work on mechanical building systems, as well as complex construction and repair projects. Their mission is to provide quality workmanship for a fair price and strive for 100% customer satisfaction.


5. DXI Construction

DXI Construction is a site preparation contractor specializing in commercial, education, and healthcare projects. They offer a range of services including clearing, excavation, grading, utilities, soil stabilization, paving, roadwork, and stormwater management. With offices in multiple states, they have extensive reach across the Mid-Atlantic region.


6. Tharco

  • Website: tharcoinc.com
  • Headquarters: Baltimore, Maryland, United States
  • Headcount: 1001-5000

Tharco Incorporated is a plumbing and gas line installation company specializing in new construction, renovations, and retrofit of commercial and multi-unit residential buildings.


7. HBW Construction

HBW Construction is a top commercial contractor in the DC, MD, VA area. They specialize in construction and building services, including budgets and estimating, job site management, and maintenance tasks. With over 50 years of experience, they prioritize minimal disruption and maximum attention to detail.


8. Nichols Contracting Inc.

Nichols Contracting, Inc. (NCI) is a general contracting company founded in 1991. With expertise in all aspects of the construction process, Nichols specializes in elevator/escalator modernization, commercial renovations, and life safety upgrade projects. They offer design-build services and have a strong focus on safety and education.


9. Morgan-Keller Construction

Morgan-Keller is a construction company based in Rockville, MD that specializes in commercial construction projects. They offer preconstruction, general contracting, construction management, design build, concrete construction, and facilities maintenance services. With over 60 years of experience, they have built a reputation for excellence and integrity in the industry.


10. J & J Construction

  • Website: jandjconst.net
  • Headquarters: Westminster, Maryland, United States
  • Founded: 2001
  • Headcount: 11-50
  • LinkedIn

J&J Construction is a construction company that offers design/build services, bid/build services, and simple maintenance services. With over 20 years of experience, they specialize in general contracting and self-performing various installations and construction tasks. They have a strong focus on integrity, customer service, and completing complex projects. J&J works with industry-leading partners to provide high-quality products for residential, commercial, aviation, and federal construction projects.


11. Hamel Builders

Hamel Builders is a successful privately held construction company specializing in multi-family mixed-use, commercial, and renovation construction deliveries. With over 30 years of experience, they prioritize long-term relationships and expertise in HUD financing. They offer a wide range of services to clients in the Mid-Atlantic region.


12. Southway Builders, Inc.

Southway Builders is a construction management firm that has been serving public, private, and non-profit clients in the Mid-Atlantic region for 30 years. They specialize in historic restoration, commercial, multi-family, adaptive re-use, and institutional projects. With a focus on quality, dependability, and integrity, they have earned a reputation as a trusted and award-winning contractor. Their experienced team of professionals values collaboration, problem-solving, and maintaining positive relationships with clients, architects, and subcontractors.


13. Pbi

  • Website: pbi1988.com
  • Headquarters: Hunt Valley, Maryland, United States
  • Founded: 1988
  • Headcount: 51-200
  • LinkedIn

PBI1988.com offers turnkey solutions for commercial construction challenges, specializing in restoration, renovation, and construction projects. With over 20 years of experience, they deliver fast and agile problem-solving services while providing great value to their clients.


14. The Severn Group, Inc.

The Severn Group is a leading commercial HVAC contractor specializing in mechanical and plumbing construction. They provide practical, cost-effective solutions and guarantee client satisfaction. They offer services such as chiller air conditioning, boiler installations and replacements, sheet metal and ductwork installations, and commercial sub-contracting.


15. Installation Services

Installation Services is a trusted company that provides end-to-end solutions for commercial construction projects. With over 30 years of experience, they offer high-quality, consistent results for property owners and managers in MD, VA, DC, NC, and FL.


16. Dustin Construction, Inc.

Dustin Construction, Inc. is a fourth-generation family-owned and operated construction management and general contracting firm. With over 60 years of experience, they proudly serve Maryland, Virginia, West Virginia, and Washington, D.C. They specialize in K-12, higher education, municipal, and commercial and retail projects.


17. ABI Construction

ABI Construction is a construction company that provides high-quality services to clients in the Washington DC Metropolitan Area. With over two decades of experience, they offer a wide range of construction solutions, including interior and base building projects for educational institutions and churches. Their dedicated team of construction professionals focuses on delivering quality work while maintaining competitive pricing.


18. City WIde Mechanical LLC

City Wide Mechanical is a professional plumbing and mechanical services company specializing in new building facilities as well as additions and renovations for commercial institutional and government buildings. They have expertise in projects for universities/schools, courthouses, fire stations, and military facilities.


19. MK Concrete Construction

MK Concrete Construction is a full-service concrete contractor specializing in residential and commercial projects. With extensive experience and expertise, they handle projects of any size, including warehouses, industrial plants, building complexes, offices, schools, retail stores, and more.


20. Hirsch Electric LLC

Hirsch Electric LLC is a leading electrical contractor specializing in commercial electrical construction. With a team of over 200 highly-trained professionals, they deliver superior quality and efficiency in all phases of their projects. They offer services in contract, service, utility, and fire alarm divisions, providing quality craftsmanship at competitive prices.


21. Constantine Commercial Construction

  • Website: ccconst.com
  • Headquarters: Timonium, Maryland, United States
  • Founded: 1988
  • Headcount: 51-200
  • LinkedIn

Constantine Commercial Construction is a full-service commercial general contractor and construction manager in the Baltimore metropolitan area. Established in 1988, they specialize in retail and restaurant construction and have a reputation for delivering excellent results while building strong relationships with their clients.


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