What started out as as short history of the 1980 Admiral Dupont
condominium building at 1700 17th Street, NW, turned out to be
quite a surprise.  It was the site of a freed slave community
immediately after the Civil War, then home to some of the city's,
as well as the country's  earliest black educators, and a 1960's
coffee shop, complete with bongo drums and special "teas." 
Holt House. National Zoo.  Historic Structure Report (HSR) prepared for the Smithsonian Institution.

Published Books

Preservation Matters principal, Stephen Hansen, is always researching and writing on his own time.  He has published two popular books of neighborhood histories that are used by architectural historians, as well as simply enjoyed by those wishing to learn more about the neighborhood.
Historic Building Survey. Forest Hill National Register Historic
District Nomination (East Cleveland, OH).

Forest Hill is an historic neighborhood spanning parts of
Cleveland Heights and East Cleveland,  The area was once the
beloved summer home of oil magnate John D. Rockefeller and
his family.

Preservation Matters principal Stephen Hansen wrote for the
monthly column "What Once Was in Washington, DC" for the
InTowner newspaper from September 2012 until June 2015.
Topics covered Washington, DC's historic development,
architectural and social history. [Article list]
Short House Histories: