You can view 3D buildings for many areas in Google Earth. There are a number of ways to do this.
3D Warehouse link - Download this in Google Earth. This is a network link to Google's 3D warehouse. It allows you to view photo-realistic 3D buildings in Google Earth that are available in the 3D Warehouse. Once you have downloaded this, any geographically-referenced 3D model in the Warehouse appears in Google Earth as a special placemark that allows you to open the associated 3D building. Once you have downloaded the 3D Warehouse link, be sure that this link is checked in the Places panel. Learn more about this feature.
3D Building layer - In the Layers panel, check 3D Buildings. This displays 3D buildings in various metropolitan areas. Learn more about using layers.
Create your own 3D model - You can create a model of any building you like and place it Google Earth using Google SketchUp. Learn more about placing 3D models in Google Earth.