Any product or service can have a trademark. (See old post about manure trademarks!) Buildings can have trademarks, too. Stadiums have brand names, and many landmarks, shopping malls, and skyscrapers do. Trump Towers, Chrysler Building, Empire State Building, Sears Tower,
Office buildings and residential buildings can have brand names too. Their services are generally related to rental, leasing and and shopping.
I recently walked past a new building in Washington, DC with a great logo:
The logo is great because it shows a center an it it formed by D C, C and C. It is simple and unique. I give it an “A” grade!
And it is protected at the USPTO [click images for USPTO records]: