An ultra-low-carbon home built entirely from cork has won this year’s Stephen Lawrence Prize for Matthew Barnett Howland, Dido Milne and Oliver Wilton.

The Cork House project – built in the grounds of a grade II-listed mill house on an island in the River Thames at Eton – was also shortlisted for the Stirling Prize.

Cork House topped a shortlist of six for the Stephen Lawrence Prize, awarded to projects with a price tag of up to £1m. They were: Dualchas Architects’ Black House; David Sheppard Architects’ Green House; HASA Architects’ Highgate Bowl; Pocket House by Tikari Works; and Jonathan Pyle’s South London House.

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