Products and Services


Change is coming

Welcome to PreserveList, Preservation Maryland’s online preservation services directory. This website is currently under construction, but listings are still accessible.

PreserveList was developed to connect preservation service providers with customers that are looking to care for their historic structures.  After the site’s full relaunch on January 1, 2023, PreserveList will be a free service to all, both those looking for preservation services and those interested in listing their relevant services.

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HD Squared Architects

Architecture & Planning

HD Squared Architects, LLC is an award-winning Architecture, Interiors, and Consulting firm based in Downtown Annapolis, Maryland.

  • Founded in 2004 in Cheverly, Maryland by Melanie Hartwig-Davis, AIA, LEED AP BD+C
  • Expanded to Anne Arundel County in 2015
  • NCARB Certified and currently licensed in the State of Maryland and District of Columbia
  • Melanie Hartwig-Davis is a LEED Accredited Professional. Sustainable Design Practices are interwoven into all aspects of our practice to increase the Resiliency of our communities.
  • Certified Woman Owned Business, MBE/DBE/SBE
  • Founded as a result of countless neighbors, friends and organizations approaching Melanie to help improve their homes and buildings. Melanie recognized a void in the availability of architectural services needed to address the unending demand for our existing built environment to adapt according to evolving needs, a change in occupants or advancing technology.
  • Portfolio includes Custom Residential, Critical Area / Waterfront, Additions, Remodeling, Kitchens & Baths, Religious, Historic Preservation, Adaptive Reuse, Commercial, Hospitality, Restaurants, Retail, Tenant Build-outs, Space Planning, Interiors, Site Design, Master Planning 

We offer personalized, friendly and professional design services that will enhance your living or work environment. We work collaboratively with our Clients, Contractors and Consultants to match our clients’ vision with their budget.