Columbia subject headings:
Architecture, Modern--21st century.
Buildings--Additions--History--21st century.
Buildings--Remodeling for other use--History--21st century.
Harvard subject headings:
Architecture, Modern--21st century
Buildings--Remodeling for other use
Princeton subject headings:
Architecture--Conservation and restoration--Pictorial works.
Buildings--Remodeling for other use--Pictorial works.