Google Building Maker tool lets you create buildings for Google Earth. “Basically, you pick a building and construct a model of it using aerial photos and simple 3D shapes – both of which we provide. When you're done, we take a look at your model. If it looks right, and if a better model doesn't already exist, we add it to 3D Buildings layer in Google Earth. You can make a whole building in a few minutes. For now, you can choose to make buildings in any of about 50 cities,” announced LatLong blog.
More info: Google Building Maker