GameCraft Miniatures have launched a new line of 28mm sci-fi buildings for use with Warhammer 40K or your favorite 28mm miniatures sci-fi gaming system.
The new line of products is modular in nature - you buy the building frame that you want, and then buy the appropriate doors and windows to finish the model. You can even modify the building frames to make them your own, so you can have a building nobody else has.