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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Marvin Windows & Doors


For four generations, Marvin Windows and Doors has built a reputation for doing the tough window replacement projects.

We’ve been solving historic rehabilitation challenges for decades—collaborating early on with architects, facilities managers and general contractors; reviewing products and options; navigating the National Parks Service guidelines; discussing window specifications with local historic commissions; and attending field testing. We offer the best project-based solutions and work with all participants to achieve excellent performance and historical accuracy.

Marvin is a proven leader in replacement windows for existing residential and commercial buildings. At every level and step of the way, Marvin brings an unmatched level of expertise to your historic project. Various departments and services provide tailored, custom service during throughout your project.