Located near Washington D.C., Rockville serves as part of the greater Baltimore-Washington metropolitan area. It offers its visitors and residents great cultural exhibits, parks, and community centers. This list is a showcase of some of Rockville’s best and leading commercial contractors—the names behind some of the community’s most recognizable spaces. These firms were chosen for their various backgrounds, experiences, and portfolios. They are also the proud recipient of countless industry accolades and provide insight into a variety of popular architectural vernaculars. Several of these companies have also had the opportunity to work on some of Rockville’s most sought-after boroughs and provide great commercial construction packages. 

Grunley Construction

15020 Shady Grove Road, Suite 500, Rockville, MD 20850

Grunley Construction is a full-service general contracting firm that operates out of its headquarters in Rockville. The company has worked on complex projects for both public and private sector customers. It specializes in building new facilities as well as renovations, restorations, and modernizations of large-scale commercial, institutional, and government buildings. The company’s portfolio showcases an excellent gallery of offices, schools, courthouses, laboratories, data centers, embassies, and multi-family projects. Grunley’s talent and expertise can best be seen in the chosen project below.

Located on 1789 Massachusetts Avenue in Washington D.C., this project was designed and constructed for the American Enterprise Institute. It was completed in collaboration with the professionals over at Hartman-Cox Architects. For this project, the firm’s team was tasked with its extensive renovation and updating. The team had to construct a new central core, install new electrical systems, and provide an updated façade. 

Forrester Construction

12231 Parklawn Drive, Rockville, MD 20852

Founded in 1988, Forrester Construction is an award-winning general contractor known for its outstanding construction management, preconstruction, and design-build services. The firm is locally-owned and operated and has been distinguished with over 282 industry awards. 22 of these distinctions are national accolades from the ABC National Excellence in Construction Awards. Forrester has also been recognized countless times for its safety practices and sustainable practices. Its team employs various green solutions, which has resulted in excellent spaces. The project below is a great example of its expertise.

Designed and constructed for Brasserie Beck, this project spans over 8,000 square feet and was completed within a five-month timeframe. It features an excellent contemporary European theme, reminiscent of Belgian-French eateries. The firm’s team opted for a great open-concept floorplan, high beam ceilings, and various large ornamental metal finishes. 

KANE Construction

101 West Dickman Street, Suite 1000, Baltimore, MD 21230

KANE Construction extends its services throughout the Washington, DC metro area. It specializes in every aspect of the high-end commercial construction process and has been recognized for its contributions to the commercial office, retail, bioscience, real estate, and healthcare markets. Its portfolio includes great data centers, tenant build-outs, and ADA upgrades. The firm marked 100 years working in and around the area in 2018, making it the oldest company on this list. It also maintains affiliations with vital organizations like the US Green Building Council, assuring clients that all of its projects are highly responsive and environmentally friendly. 

The project above is an excellent example of the firm’s work. Completed for Barbaricum, this project serves as the brand’s headquarters. It spans over 7,500 square feet and was finished on a ten-week timeframe. On this spectacular project, the company collaborated with the professionals over at Fox Architects. 

Mazzuca Contracting

10907 Guillford Road, Suite A, Annapolis Junction, MD 20701

Mazzuca Contracting operates out of its offices in Annapolis, Maryland and San Antonio, Texas, and has had the opportunity to work all across the United States. The firm is among Inc. 5000’s fattest growing private companies and offers its clients a highly seamless and comprehensive approach. Some of its best work can be found in the metro areas of  Maryland, Northern Virginia, and Washington. Since its establishment, the company has developed an excellent clientele list, and 70% of its projects come from repeat clients. The company is composed of a talented and experienced team of leaders, estimators, managers, assistants, and superintendents. Together, they work closely together with each of the firm’s clients and complete everything on time and within the agreed-upon budget. 

This project, below, showcases the firm’s work for Whiteford Taylor Preston. Located in Falls Church, this project entailed over 19,000 square feet of interior fit-outs. The firm’s team had to demolish the entirety of its eighth floor and construct all-new offices, open work areas, and conference rooms. The firm’s team also worked on its custom millwork, which included its granite and Corian tops and wood veneer panels. 

Liberty Group Construction

330 North Stonestreet Avenue, Suite E, Rockville, MD 20850

Liberty Group LLC has been a commercial general contractor since 2012, and specializes in the design and construction of dental and medical offices in the Washington DC Metropolitan area. The company is headquartered in Rockville, Maryland and offers value to medical practice owners through their full package design-build service where they oversee every step from selecting the space and initial design concepts, all the way through the construction phase and grand opening. The Liberty team takes pride in their hands-on approach in the design and construction phase, utilizing design-coordination between the architects, engineers and third party medical reps to eliminate potential issues early in the pre-construction phase. Creating a hassle-free exciting experience for medical professionals opening their new practice is the mission vision of the company’s founders, father-and-son-duo John and Aras Sanati. Under their leadership, the company assures clients that their projects can be kept in-house, removing the challenge of having to find competent subcontractors, designers or consultants. The company has built dental and medical offices throughout Maryland, Washington DC, and Northern Virginia.

The project above was finished in Great Falls, VA for Costa Dentistry. It was completed back in 2020 and is the second location built for Dr. Shane Costa. It features a stellar modern design by GTM Architects, and Dr. Costa had Liberty come back last year to remodel his other practice location so it can have a consistent design theme matching this amazing new space.

KasCon Contracting

6325 Woodside Court, Suite 300 Columbia, MD 21046

KasCon Contracting is a commercial general contractor and management firm that assists its clients throughout the entire process. Headquartered in Columbia, the firm’s portfolio depicts a stellar range of interiors, adaptive reuse, new building construction, full-building renovation, and occupied renovations from a wide variety of market types. Some of its best work can be found in the most sought-after areas of the Baltimore-Washington area. It has worked on countless office, healthcare, education, retail and religious spaces. 

Located in Fulton, this space was completed for Mikey & Mel’s Deli. The project entailed having to work on its full commercial kitchen and cooler, its finishes, and unique noise reduction modifications. The KasCon team also worked on custom lit signs, wall graphics, and a custom-built interior trellis system. 

Doyle Construction

2 Research Place, Suite 102, Rockville, MD 20850

Operating out of its office in the heart of Rockville, Doyle Construction has been in the industry for four generations and continues to commit itself to the highest standards. It offers an excellent range of pre-construction services, design and build solutions, and project management services. The company has worked across the Southeast, Mid-Atlantic, and Northeast. It is also a proud and active member of the US Green Building Council, assuring all of its clients that its spaces are responsive and sustainable. The firm also keeps up-to-date with the latest green building techniques. 

The project above is a great example of the firm’s expertise. It was designed and constructed for Lidl at various locations across the Mid-Atlantic.


  • Jake Gustafson

    Jake has served as Senior Editor at General Contractors and brings a wealth of experience rooted in his passion for building. Holding a degree in Construction Engineering Management from Oregon State University, he actively engaged in industry-related activities, including membership in the Associated General Contractors of America student chapter and participation in the Associated Schools in Construction student competition. Previously, Jake served as a project engineer for a prominent general contractor in Portland, where he played a pivotal role in various aspects of construction projects, from pre-construction to subcontractor management. His expertise extends to working on innovative projects, such as North America's largest CLT commercial building. Expertise: Commercial Construction, Commercial Remodeling, Home Design and Build Key Highlights: Editor at General Contractors, Project Engineer for Portland-based general contractor, Field Engineer for the largest CLT commercial building in North America Education: Oregon State University, Degree in Construction Engineering Management