Construction sights: More on Building One9, the nine storey apartment building that went up in 5 days (slideshow)

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Unlike the Atlantic Yards project or other tall prefabs, the structure of the building is built into the modules. This is a lot easier to do than plugging modules into a structural frame, but limits the height. Nine storeys is apparently the limit here.

The environmentally sustainable benefits of the UB System are at the heart of the One9 offer, which will feature a 6 star energy rating and a focus on residents taking up sustainable transport alternatives such as cycling, public transport, or a building car-share scheme. Double glazed windows for superior thermal and acoustic performance, grey water recycling and solar hot water panels on the roof also enhance the green aspects of the building.

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