HD Squared Architects

Passion for Projects with a Purpose.  Healthy, Sustainable, Inspiring. 

Renovated interior kitchen for home addition

HD Squared Architects, LLC  is an MBE/DBE/SBE certified Architecture, Interior Design, and Consulting firm with offices in Cheverly and Edgewater, MD.   Through Melanie Hartwig-Davis’ position as CEO and her extensive civic and volunteer involvement, MHD has mastered multiple skillsets to contribute to the success of your project.  Ms. Hartwig-Davis brings to the table in-depth passion for projects with a purpose.  Whether it is preserving history and community through mixed use historic preservation, converting your commercial interiors into a productive and healthy environment, or bringing the order of space and nature into your restructured home, Melanie transforms with her genuinely insightful design skills.

Sustainability is the marriage of design process with a technical understanding of site, energy, water and materials. HD Squared is proud to immerse ourselves in this relationship in order to improve our existing environments. We place an emphasis on the importance of renewable energy systems, minimizing the energy required for our projects and using materials requiring minimal maintenance.  We incorporate storm water best management practices (BMPs) whenever possible.

We offer personalized, friendly, professional design services that will enhance your living or work environment while striving to match your vision with your budget. Take a look at our portfolio of completed projects to see how these visions came to life.

Our diverse project portfolio includes:

  • Residential Architecture – Specializing in Waterfront
  • Commercial Interior Design
  • Custom Interior Architecture
  • Landscape, Hardscape and Site Design
  • Adaptive Reuse including Historic Structures
  • Universal Design
  • Smart Home
  • Project Management
  • Construction Administration
  • Permit Expediting
  • LEED
  • Historic Preservation, Grants and Bond Bills
  • Permit Expediting

Contact us today to discuss your current and potential projects!

Melanie Hartwig-Davis works with a unique team of staff and consultants who dedicate their talents to projects based on each client’s needs, expectations and budget. Check out the testimonials from our previous clients and contractors to see how we’ve met and exceeded their needs.

Melanie Hartwig-Davis, AIA, LEED AP BD+C

Melanie Hartwig-Davis AIA LEED AP BD+C Principal and Owner of HD Squared ArchitectsMrs. Hartwig-Davis has emphasized the importance of sustainable building practices since architectural school as exhibited by her platform as a National Director of the American Institute of Architecture Students (AIAS). Ms. Hartwig-Davis received her B. Arch. from Mississippi State University. She has been ‘in the business’ for over 17 years, beginning her career at Bignell.Watkins.Hasser Architects, P.A. in Annapolis, MD. where she brought sustainable thinking to retail, housing, and civic projects throughout the central east coast. Upon receiving her MD Architectural license, she began her own architectural practice in Cheverly, MD, which formally became HD Squared Architects, LLC in 2004. She excels in assisting clients with the vision, planning and execution of their project. Ms. Hartwig-Davis’ engaging personality makes architecture tangible to everyone, regardless of their exposure to the field of architecture. She strives to apply her passion for sustainability to all aspects of her business and life.

In the fall of 2008, she earned the title of LEED Accredited Professional to formalize her commitment to sustainability in architecture. In addition to residential projects of every scale, Ms. Hartwig-Davis’ Commercial experience includes a law office renovation on Andrews Air Force Base, multiple car dealership renovations,  office and clinic expansion for pediatric patients, site and landscaping design for large retain centers and various tenant Build-Outs.

Melanie Hartwig-Davis WSSC Commission speaking at podium to audienceShe consistently takes leadership roles in sustainability by serving on boards such as the Maryland League of Conservation Voters (MDLCV) where she guides and advocates for sustainable policies.  In 2011 she was appointed by County Executive Rushern Baker to represent Prince George’s County as a Commissioner of the Washington Suburban Sanitary Commission (WSSC).  WSSC provides water and sewer services to over 1.8 million MD residents in Montgomery and Prince George’s County. In this role, Mrs. Hartwig-Davis brought a unique and skilled perspective of construction, building and sustainable aspects to the Commission. She was a founding member of the Cheverly Green Infrastructure Steering Committee. She served on the MD State Board of Certified Interior Designers at the appointment of then Gov. O’Malley. She is a graduate of the Class of 27 of Leadership Prince George’s County.  She was selected to the Environmental Action Council (EAC) of DoE and DPIE’s Process Transformation Team in Prince George’s county.  Mrs. Hartwig-Davis’ work has been featured in magazines, newspapers, and television over the years.



Sustainability is intrinsic to the design process at HD Squared Architects, LLC – regardless of the size, scope or budget of our projects. A healthy built environment is critical to our well-being. Over 90% of our time is typically spent indoors. Well-designed, high performance, low maintenance buildings lower construction and operating costs for our clients while reducing our impact on the natural environment. This approach maximizes the value of our clients’ designs.

Sustainable practices to join the built and natural environment like rain gardens and green roofsWe particularly enjoy the integration of site design with the built environment to enhance the holistic experience of our buildings. We incorporate storm water management, strategic daylighting techniques, in addition to selections that lessen the heat island effect and night sky concerns.

As conscientious design professionals, we engage the entire project team in striving to create a positive impact for the environment as well as for our building occupants. View our Portfolio page for past projects.

One of HD Squared Architects’ sustainable focuses is the use of solar power for clean energy

WSSC Solar Program

During her time as a Commissioner for Washington Suburban Sanitary Commission (WSSC), Mrs. Hartwig-Davis was involved in the development of the WSSC’s Solar Program.

WSSC is committed to clean energy, and installed almost 17,000 solar panels to provide green power to two of their wastewater treatment plants. The two plants together should generate about 6.6 million kWh of solar energy per year. By providing 17% of the electricity required to operate the two treatment plants, WSSC’s carbon footprint has been reduced by about 3.5%.

Learn more about this sustainable venture on WSSC’s website.

Town of Edmonston Project

A key project HD Squared Architects has worked on involving the use of solar power was the Town of Edmonston Solar Study. The Energy Efficiency and Conservation Block Grant received by the town required improved energy efficiency and energy preservation. HD Squared consulted on the renovation of the Town Hall into the Edmonston Green Educational Center. An energy audit was performed to identify opportunities for solar installation to meet this expectation of the grant for this building. Below is a 3-D model of one option for roof framework that would maximize solar capacity for the Town of Edmonston project.