Many times, the documentation from a particular architect's office has been lost or is maintained internally or by the family. Sometimes it will make its way into a library collection.
If you're searching Google, try something like "architectural drawings collection site:.edu" to pick up archival collections at various universities.
Use these to search the library catalog more efficiently and effectively - enter them in the "Subject beginning with" drop-down in the UMD catalog or the "Subject" field of the advanced search in any library catalog.
Try some of these for images and maps:
Photographs -- [any geographic location]
[any geographic location] -- Pictorial works
[any geographic location] -- Maps
Although many of these photographs remain under copyright, the "photo morgues" of newspapers and magazine sometimes make their way into libraries and can be a great resource. Some are online, and some are close by!
UMD's map collections are in three locations: Hornbake Library/Maryland Room (Maryland maps), McKeldin Library 4th floor (government maps) and online (databases).
Pre-Internet, people laboriously created lists of what maps appeared in what books...they're still helpful! So are online bibliographies.