The Royal Institute of British Architects (RIBA) has announced that the winner of the 2015 House of the Year award is the Flint House in Buckinghamshire.
The buiding, designed by Skene Catling De La Pena, and was chosen for its "celebration of location, material and architectural design".
The main house and annexe is covered by cladding that starts at the base as knapped flint and slowly changes in construction and texture until it becomes chalk blocks at the highest point.
The building contains rooftops, terraces and recesses and is based in the Rothschild’s estate at Waddesdon Manor.
RIBA President Jane Duncan said: "The shortlist for the RIBA’s House of the Year represents a remarkable diversity of architectural skills and outcomes.
"Although superbly original and unique, the Flint House continues a fine tradition of RIBA award-winning houses that provide exemplars for others: architects, clients and developers."
The winner was announced during a special four-part TV series for Channel 4, Grand Designs: House of the Year.
The shortlist also included the following:
Kew House, London, by Piercy & CompanyÂ Â Â Â
Levring House, London, by Jamie Fobert ArchitectsÂ Â Â Â
Maghera, Co Down, by Mcgonigle McGrathÂ Â Â Â Â
The Mill, Scottish Borders, by WT ArchitectureÂ Â Â Â
Sussex House, West Sussex, by Wilkinson King ArchitectsÂ Â Â Â
Vaulted House, London, by vPPR Architects
Images via RIBA