Commercial construction companies in Maryland play a vital role in building infrastructure and facilities that drive economic growth. These firms vary in size and scope, ranging from large general contractors to smaller specialized firms. They tackle a wide array of projects including educational institutions, healthcare facilities, and commercial properties. The industry is evolving toward sustainable practices and integrating advanced technologies, with a growing emphasis on eco-friendly materials and efficient project management methods. This shift reflects an increasing awareness of environmental responsibility and operational efficiency among clients and builders alike.


The companies featured in this list represent a robust segment of Maryland's commercial construction sector. They range from small teams of fewer than 50 employees to large organizations with thousands. These firms are headquartered across various Maryland cities, with establishments dating back to as early as 1904. Their specializations include construction management, general contracting, and renovation services, catering to diverse client needs. Notable examples include The Whiting-Turner Contracting Company and Morgan-Keller, both known for their impressive project portfolios and commitment to quality and safety in construction.


Continue reading to discover Maryland's top commercial construction companies.


Top 21 Commercial Construction Companies in Maryland


1. The Whiting-Turner Contracting Company


The Whiting-Turner Contracting Company is a prominent construction firm based in Towson, Maryland, specializing in construction management, general contracting, and design-build services. Established in 1909, the company has built a reputation for delivering high-quality construction projects across various sectors, including healthcare, education, and entertainment. With a workforce of nearly 5,000 employees, Whiting-Turner operates nationwide, emphasizing a strong commitment to safety and community involvement. Their extensive portfolio includes notable projects such as the Under Armour Global Headquarters and the Korean War Veterans Memorial Wall of Remembrance. The company prides itself on its core values of integrity, excellence, experience, and leadership, which guide its operations and client relationships. Whiting-Turner actively engages in innovative practices and quality management, ensuring that projects are completed to the highest standards.


2. Morgan-Keller

  • Website: morgankeller.com
  • Ownership type: Family Owned
  • Headquarters: Frederick, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1955
  • Headcount: 51-200
  • LinkedIn: morgan-keller-construction

Morgan-Keller is a family-owned construction firm based in Frederick, Maryland, with a history dating back to 1955. The company specializes in commercial construction services, offering a range of solutions including general contracting, construction management, and sustainable construction. With a workforce of approximately 139 employees, Morgan-Keller has built a reputation for delivering high-quality results while effectively managing project timelines and budgets. Their client base primarily consists of businesses and organizations that require professional construction services for various projects. The firm has successfully completed numerous projects across different sectors, showcasing their expertise in handling complex construction challenges. Morgan-Keller is also committed to sustainable practices, employing LEED Accredited Professionals to ensure environmentally responsible construction. Their active involvement in the community and focus on safety further enhance their standing in the industry.


3. Warner Construction

  • Website: warner-construction.com
  • Ownership type: Private
  • Headquarters: Frederick, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2002
  • Headcount: 11-50
  • LinkedIn: warnerconstruction

Warner Construction, based in Frederick, Maryland, is a private construction firm that has been operational since 2002. With a workforce of around 40 employees, the company specializes in a wide array of construction services, including preconstruction, construction management, general contracting, design-build, and sustainable construction. They cater to various sectors, notably education, healthcare, and commercial real estate, ensuring that projects are executed efficiently and meet high standards. Warner Construction prides itself on its strong work ethic, integrity, and commitment to safety, which is reflected in their industry-leading safety program. The company has received multiple awards for its projects, showcasing its capability and dedication to quality. Their community involvement further underscores their commitment to the regions they serve, making them a well-rounded player in the commercial construction industry.


4. Trident Builders LLC

  • Website: tridentbuilds.com
  • Ownership type: Private
  • Headquarters: Halethorpe, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: October 2022
  • Founded year: 2015
  • Headcount: 11-50
  • LinkedIn: trident-builders-llc

Trident Builders LLC, based in Halethorpe, Maryland, is a construction management and general contracting firm that specializes in commercial, residential, and government projects. Founded in 2015, the company has grown to a team of 11-50 employees, bringing over a century of combined experience in the construction industry. Trident Builders is known for its commitment to quality craftsmanship and integrity, working closely with clients to ensure successful project outcomes. Their portfolio includes notable projects such as the Ritz-Carlton residences and the Tobacco Leaf retail store, showcasing their ability to manage both high-end and community-focused developments. The firm operates primarily in Maryland, Washington DC, Delaware, and Virginia, and has a strong emphasis on innovative construction practices, including sustainable building techniques. Trident Builders also engages in community service, supporting local organizations with construction-related needs, further solidifying their role as a trusted partner in the industry.


5. Grunley Construction Company, Inc.

  • Website: grunley.com
  • Ownership type: Private
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Founded year: 1988
  • Headcount: 201-500
  • LinkedIn: grunley-construction

Grunley Construction Company, Inc. is a construction firm based in Rockville, Maryland, with a focus on high-profile projects across public and private sectors. Established in 1988, the company has built a reputation for delivering complex construction projects on time and within budget. Grunley offers a range of services, including preconstruction, construction, and virtual design, which allows them to effectively manage the entire construction process. Their portfolio includes large-scale commercial, institutional, and government buildings, demonstrating their capability in handling diverse project types. With a team of over 340 skilled professionals, including architects and engineers, Grunley is well-equipped to tackle the challenges of modern construction. Their commitment to quality and efficiency has earned them recognition in the industry, making them a notable player in the commercial construction sector.


6. Harkins Builders, Inc.

  • Website: harkinsbuilders.com
  • Ownership type: Private
  • Headquarters: Columbia, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1965
  • Headcount: 201-500
  • LinkedIn: harkinsbuilders

Harkins Builders, Inc., based in Columbia, Maryland, is a construction company that specializes in preconstruction, construction management, and design-build services. Established in 1965, the firm has built a reputation for delivering quality projects across multifamily, commercial, and government sectors. With a workforce of approximately 324 employees, Harkins operates as an employee-owned entity, which fosters a culture of collaboration and commitment among its team members. The company has successfully completed numerous projects, demonstrating its capability to handle complex construction challenges. Harkins Builders emphasizes safety and community involvement, reflecting its dedication to not just building structures, but also enhancing the communities in which they operate.


7. Riparius Construction

  • Website: riparius.com
  • Ownership type: Private
  • Headquarters: Cockeysville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1987
  • Headcount: 11-50
  • LinkedIn: riparius-construction-inc-

Riparius Construction, established in 1987 by Michael McCarthy, is a private construction firm based in Cockeysville, Maryland. The company specializes in managing commercial construction projects across multiple sectors, including biotechnology, education, and retail. With a workforce of 24 employees, Riparius is equipped to handle projects with contract values reaching up to $150 million. Their service offerings include comprehensive pre-construction services such as estimating, scheduling, and quality control, alongside construction management that emphasizes cost control and project oversight. Riparius has successfully completed a variety of projects, from educational facilities to biotechnology labs, showcasing their adaptability and expertise in the commercial construction field. Their commitment to integrity and quality has fostered strong relationships with clients, many of whom return for additional projects, highlighting their reliability and effectiveness in delivering successful outcomes.


8. Hubert Construction LLC

  • Website: hubertco.com
  • Ownership type: Private
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1998
  • Headcount: 11-50
  • LinkedIn: hubert-construction-llc

Hubert Construction LLC, based in Rockville, Maryland, is a construction firm that specializes in general contracting, design/build, and construction management. Established in 1998, the company has built a strong portfolio of commercial projects, including office buildings, recreational facilities, and retail centers. With a workforce of 37 employees, Hubert Construction prides itself on its commitment to integrity, service, and performance. The firm has successfully managed numerous projects, demonstrating expertise in pre-construction services, construction management, and general contracting. Their dedication to client relationships and project quality has earned them several industry awards, highlighting their contributions to the commercial construction sector. Hubert Construction operates primarily in the United States, focusing on delivering comprehensive construction services tailored to the needs of businesses and organizations.


9. Mullan Contracting Company


Mullan Contracting Company, based in Timonium, Maryland, has been a significant player in the construction industry since its inception in 1904. Specializing in construction management and general contracting, the company has built a reputation for managing complex projects with a focus on quality and client satisfaction. Mullan serves a variety of clients, including educational institutions, retail businesses, and municipalities, showcasing their ability to handle diverse project types. Their portfolio includes notable projects such as the construction of courthouses, shopping centers, and educational facilities, reflecting their extensive experience in the commercial sector. Mullan Contracting is also committed to sustainable building practices, offering services that align with LEED certification and environmentally conscious construction. With a dedicated team of 20 employees, the company continues to operate primarily in the Mid-Atlantic region, maintaining a strong presence in the local construction market.


10. IMEC Group

  • Website: imecgroupllc.com
  • Ownership type: Private
  • Headquarters: Columbia, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2008
  • Headcount: 11-50
  • LinkedIn: imec-group-llc

IMEC Group, LLC, founded in 2008 and based in Columbia, Maryland, is a private construction engineering firm that specializes in integrated construction and facility management services. The company is certified as a minority-owned business and holds an SBA 8(a) certification, which allows them to participate in federal contracting opportunities. IMEC Group serves clients across various sectors, including federal, state, municipal, commercial, and residential markets. Their service offerings include project management, design/build solutions, and facility management, emphasizing high-quality results and value through disciplined execution. The firm has completed numerous projects in government, healthcare, education, and civic sectors, showcasing their capability to handle a range of construction needs. IMEC Group's commitment to community involvement and ethical business practices further enhances their profile in the industry.


11. CAM Construction

  • Website: cambuilds.com
  • Ownership type: Private
  • Headquarters: Timonium, Maryland, United States (USA)
  • Employee distribution: United States (USA) 65%, Pakistan 29%, Australia 6%
  • Founded year: 1962
  • Headcount: 11-50
  • LinkedIn: cam-construction-builds

CAM Construction, based in Timonium, Maryland, has been a significant player in the commercial construction industry since its founding in 1962. The company specializes in a range of services, including pre-construction, design-build, construction management, and general contracting. With a workforce of approximately 66 employees, CAM Construction has successfully completed over 400 projects, primarily serving clients in the education, medical, retail, and non-profit sectors. Their commitment to quality and community service is evident through their extensive portfolio, which includes notable projects for institutions like the Maryland Stadium Authority and Baltimore County Public Schools. CAM Construction has also been recognized with over 80 awards for excellence in construction, safety, and customer satisfaction. Their focus on local projects and community support further solidifies their position in the commercial construction market.


12. Miller & Long Co., Inc

  • Website: millerandlong.com
  • Ownership type: Private
  • Headquarters: Bethesda, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1947
  • Headcount: 1001-5000
  • LinkedIn: miller-%26-long-co--inc-

Miller & Long Co., Inc. is a prominent construction firm based in Bethesda, Maryland, specializing in structural concrete services. Established in 1947, the company has grown from a small operation into a significant player in the concrete construction industry, particularly within the Mid-Atlantic region. They offer a comprehensive suite of services, including preconstruction, formwork installation, concrete finishing, and more. Their client base includes general contractors and commercial real estate developers, who rely on their expertise to deliver durable and efficient structures. Over the years, Miller & Long has completed more than $8 billion in concrete construction projects, pouring over 20 million cubic yards of concrete. The company is also recognized for its commitment to safety and community engagement, actively participating in charitable activities and training programs for future construction professionals. With a workforce of 242 employees, Miller & Long continues to innovate and adapt to meet the evolving needs of the construction industry.


13. Desbuild Incorporated

  • Website: desbuild.com
  • Ownership type: Private
  • Headquarters: Hyattsville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 64%, Cyprus 13%, New Zealand 8%, Other 16%
  • Founded year: 1993
  • Headcount: 51-200
  • LinkedIn: desbuild-inc

Desbuild Incorporated, established in 1993 and headquartered in Hyattsville, Maryland, is a commercial general contractor and design-build firm. The company specializes in providing construction and renovation services to a variety of clients, including commercial enterprises, municipal bodies, and federal agencies. With a workforce of approximately 78 employees, Desbuild emphasizes quality and customer satisfaction in all its projects. Their portfolio includes a wide range of public and private building and remodeling projects, showcasing their ability to manage complex construction tasks effectively. Desbuild has also gained recognition for its international construction capabilities, having completed numerous projects for the U.S. State Department and other federal agencies around the world. This experience positions them as a reliable partner for both domestic and international construction needs.


14. DD&B Construction, Inc.


DD&B Construction, Inc. is a commercial construction firm based in Gaithersburg, Maryland, with a regional office in San Antonio, Texas. Founded in 1981, the company has built a strong foundation in the construction industry, specializing in various commercial building projects. Their portfolio includes hotels, multi-family residences, civic structures, and commercial spaces such as offices and retail centers. With a dedicated team of approximately 42 employees, DD&B emphasizes comprehensive construction management services, ensuring projects are executed efficiently and meet high standards. The firm has maintained a 100% project completion rate over its four-decade history, showcasing its reliability and commitment to quality. DD&B Construction serves a range of clients, including businesses and organizations, and has developed a reputation for effective communication and safety in its operations.


15. Nichols Contracting Inc.

  • Website: nicholscontracting.com
  • Ownership type: Private
  • Headquarters: Columbia, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1991
  • Headcount: 51-200
  • LinkedIn: nichols-organizations

Nichols Contracting Inc., based in Columbia, Maryland, has been a player in the construction industry since its inception in 1991. The company specializes in design-build services, catering to commercial, institutional, and government projects. With a workforce of approximately 86 employees, Nichols employs a master builder approach, which emphasizes accountability and quality in project delivery. This approach allows them to self-perform various construction tasks, enhancing control over costs and schedules. Over the years, Nichols has successfully completed more than 1,500 projects across eight states, showcasing their operational reach and expertise. Their commitment to safety and employee development further underscores their dedication to maintaining high standards in construction practices. Nichols Contracting Inc. continues to be a reliable partner for clients seeking comprehensive construction solutions.


16. KasCon, Inc.

  • Website: kasconinc.com
  • Ownership type: Private
  • Headquarters: Columbia, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1999
  • Headcount: 11-50
  • LinkedIn: kascon-inc.

KasCon, Inc. is a commercial construction company based in Columbia, Maryland, specializing in general contracting and project management. Established in 1999, the firm has built a solid reputation for delivering comprehensive construction services across various sectors, including healthcare, education, retail, and industrial projects. With a team of 32 employees, KasCon focuses on providing tailored solutions that address the unique needs of each client. Their services span the entire project lifecycle, from pre-construction planning to post-construction support. The company prides itself on its proactive leadership and meticulous oversight, which help clients navigate the complexities of construction projects. KasCon's portfolio includes a variety of projects, such as office buildouts, full building renovations, and adaptive reuse initiatives, showcasing their versatility and expertise in the field.


17. Forrester Construction


Forrester Construction, based in Rockville, Maryland, is a private construction firm that specializes in construction management, preconstruction, and design-build services. Founded in 1988, the company has established itself as a prominent contractor in the Washington, DC area, serving a variety of commercial and institutional clients. Forrester is recognized for its commitment to quality and safety, having received over 315 industry awards for its projects. The firm has completed more than 80 LEED certified projects, showcasing its dedication to sustainable building practices. With a workforce of around 100 employees, Forrester emphasizes client satisfaction and has developed long-term relationships with many of its clients and subcontractors. The company actively participates in community initiatives and invests in the development of future construction professionals through mentorship and internship programs.


18. HESS Construction


HESS Construction, based in Rockville, Maryland, has been a significant player in the commercial construction sector since its inception in 1978. The company specializes in constructing educational facilities and municipal buildings, catering to clients such as schools and local governments. With a workforce of approximately 115 employees, HESS Construction prides itself on its ability to manage the entire lifecycle of construction projects, from feasibility studies to project completion. Their portfolio includes over 450 new and renovated facilities, showcasing their expertise and commitment to quality. HESS Construction is also known for its strong community ties and active participation in local initiatives, further solidifying its role in the construction industry.


19. NARDI Construction, Inc

  • Website: nardiconstruction.com
  • Ownership type: Private
  • Headquarters: Beltsville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1978
  • Headcount: 11-50
  • LinkedIn: nardi-construction-inc

NARDI Construction, Inc. is a privately owned construction firm based in Beltsville, Maryland, with a workforce of approximately 23 employees. Established in 1978, the company initially focused on condominium conversions before shifting its emphasis to commercial construction in the early 1980s. Over the years, NARDI has completed millions of square feet of construction, with a project volume exceeding $500 million. Their services include general contracting, construction management, design-build, and property management, catering primarily to developers and property owners. NARDI has made a significant mark in the tilt-up construction market, completing several million square feet using this method. The company prides itself on its commitment to quality, integrity, and client satisfaction, which has fostered long-term relationships with clients and subcontractors alike. NARDI's portfolio showcases a variety of projects, including educational facilities, municipal buildings, and retail spaces, reflecting their adaptability and expertise in the commercial construction industry.


20. Encore Construction, Inc.


Encore Construction, Inc., based in Annapolis, Maryland, is a commercial construction company that has been operational since 2003. The firm specializes in general contracting, pre-construction, and construction management services, catering to a variety of sectors such as restaurants, retail, and medical facilities. With a dedicated team of professionals, Encore Construction focuses on delivering high-quality results while ensuring effective communication with clients throughout the project lifecycle. Their portfolio includes notable projects like The Point restaurant in Washington, D.C., showcasing their capability to handle complex builds. The company prides itself on its attention to detail and commitment to completing projects on time and within budget, making it a trusted partner for businesses in Maryland, Washington, D.C., Virginia, and the Delmarva region.


21. Boulevard Contractors Corp

  • Website: blvdcontractors.com
  • Ownership type: Private
  • Headquarters: Owings Mills, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2008
  • Headcount: 11-50
  • LinkedIn: boulevard-contractors-corp

Boulevard Contractors Corp, based in Owings Mills, Maryland, is a private construction firm founded in 2008. With a team of 18 employees, the company specializes in general construction, project management, design and build, and renovations. They cater to a variety of sectors, including education, government, and hospitality, ensuring that projects are completed on time and within budget. Boulevard Contractors has a notable presence in the Mid-Atlantic region and has expanded its operations to Florida. The firm is minority-owned and holds various certifications, which enhances its credibility in the market. Their portfolio includes significant projects such as renovations for educational institutions and commercial facilities, demonstrating their capability in handling complex construction tasks. The company prides itself on its commitment to quality and customer satisfaction, as reflected in the testimonials from satisfied clients.



Commercial Construction Insights: Key Companies in Maryland


CompanyHeadquarterSizeFoundedOwnership
The Whiting-Turner Contracting CompanyTowson, Maryland, United States (USA)1001-50001909Private
Morgan-KellerFrederick, Maryland, United States (USA)51-2001955Family Owned
Warner ConstructionFrederick, Maryland, United States (USA)11-502002Private
Trident Builders LLCHalethorpe, Maryland, United States (USA)11-502015Private
Grunley Construction Company, Inc.Rockville, Maryland, United States (USA)201-5001988Private
Harkins Builders, Inc.Columbia, Maryland, United States (USA)201-5001965Private
Riparius ConstructionCockeysville, Maryland, United States (USA)11-501987Private
Hubert Construction LLCRockville, Maryland, United States (USA)11-501998Private
Mullan Contracting CompanyTimonium, Maryland, United States (USA)11-501904Private
IMEC GroupColumbia, Maryland, United States (USA)11-502008Private
CAM ConstructionTimonium, Maryland, United States (USA)11-501962Private
Miller & Long Co., IncBethesda, Maryland, United States (USA)1001-50001947Private
Desbuild IncorporatedHyattsville, Maryland, United States (USA)51-2001993Private
DD&B Construction, Inc.Gaithersburg, Maryland, United States (USA)11-501981Private
Nichols Contracting Inc.Columbia, Maryland, United States (USA)51-2001991Private
KasCon, Inc.Columbia, Maryland, United States (USA)11-501999Private
Forrester ConstructionRockville, Maryland, United States (USA)51-2001988Private
HESS ConstructionRockville, Maryland, United States (USA)51-2001978Private
NARDI Construction, IncBeltsville, Maryland, United States (USA)11-501978Private
Encore Construction, Inc.Annapolis, Maryland, United States (USA)11-502003Private
Boulevard Contractors CorpOwings Mills, Maryland, United States (USA)11-502008Private


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