This is from an episode of James May's "Toy Stories".
It is a full size house made from Legos.
(
https://www.youtube.com/watch?v=HShqL3q8D7s )
If you haven't seen this series you should check it out. Every episode he does something spectacular with his childhood toys. Right now I am watching the episode where he runs his toy train 10 miles between 2 towns. Yes you heard right,he laid 10 miles of toy train track!