Single-family detached home
free-standing residential building
Potter House
Hatter Hall
Logue House
Proctor House
Prospect Place
Ashford Mansion
Pugh Dungan House
Pugh House
Quintin Blair House
R.C. Ropp House
R. B. and Lizzie L. Louden House
R. Buckminster Fuller and Anne Hewlett Dome Home
R. L. Anderson House
R. T. Price House
Rafael Gonzalez House
Ralph Bunche House
Ralph John Ramer House
Ramey House
Rancho Los Alamitos
Randall Fawcett House
Randle Ranger Station-Work Center
Randolph Bainbridge House
Rapides Lumber Company Sawmill Manager's House
Reed O. Smoot House
Reed–Wells House
Rhodes Hall
Rice House
Richard Barker Octagon House
Richard C. Smith House
Richard Guenther House
Richard H. Mitchell House
Richard Hapgood House
Richard T. Ely House
Richard and Geraldine Hodgson House
Richmond Hill House
Ricketts House
Riley Lucas Bartholomew House
Ritcher House
Robert A. Millikan House
Robert Bruce Barbour House
Robert H. Rose House
Robert H. Sunday House
Robert Lutz House
Robert Ostertag House
Robert P. Parker House
Robert R. Blacker House
Robert Rensselaer Bartlett House
Robert Treat Paine Estate
Robert W. Hazlett House
Robert Wagner House