I am not sure what you meant exactly, but in the Xbox 360 verison you can update building by maxing out career levels in certain careers such as Journalism, Political, Music, et cetera. When you update the buildings you get challenge points and you get a more updated version of the building. I think the newer updated ones are rather pretty. I'm not sure if you can do these same things on the one for PS3, but you could probably look under your Challenges & Rewards section, and if its anything like the Xbox 360 it'd be under Life Challenges.