The New London Architecture competition challenges architects to solve London's worsening housing shortage. From 100 shortlisted ideas, the NLA announced 10 winners last week, including concepts for floating waterway homes and parasitic apartment blocks. 

Presented as the UK's first amphibious home, Baca Architects designed a prefab model for first-time buyers, estimating it could provide 7,500 starter homes on 50 miles of rivers and canals.

Another unique plan comes from Housing Over Public Assets projects, which Bill Price estimates will create 630,000 new homes over public buildings like libraries, schools, and hospitals. The public buildings would be rebuilt by private companies while being funded by the rental of the above apartments.

The 100 projects on the NLA's short list will be on show at The Building Centre in London from 15 October to 17 December 2015.

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