Eddie Heath, from Dilhorne in Staffordshire, built the Buckingham Palace replica from a thousand wooden pallets donated by local companies.
In the past, he's built models of Big Ben, the Tower of London and the White House, but will now hang up his hammer.
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Footage of the police raid shows that the house had been entirely gutted and replaced with growing equipment.
They wanted to support the Sherpa communities following the 2015 earthquake.
Cold with a mix of sunshine and showers today.