The Royal Institute of British Architects' annual award is given to the best house or extension completed by an architect in the UK in the last year.
Included in this year's longlist is a Dorset retirement home by Ström Architects, which first featured on Dezeen as a series of hugely popular renderings three years ago, and a residence with rippling white walls that crowns the White Cliffs of Dover by Tonkin Liu.
The 2017 RIBA House of the Year Award longlist follows the announcement of the 2017 RIBA National Awards earlier today.
There's a cross-over between the two lists, with Shawm House by MawsonKerr Architects, and Caring Wood by Macdonald Wright Architects and Rural Office for Architecture both longlisted for the House of the Year Award and recognised in this year's RIBA National Awards – putting them both in the running for the illustrious Stirling Prize.
The winner of the 2017 RIBA House of the Year Award will be announced this autumn.
Last year, the award went to Richard Murphy's "box of tricks" house in Edinburgh, which features secret hatches, moving walls and a sliding ladder.
Scroll down to see the full list of this year's contenders:
› Peacock House; Suffolk, England, by BHSF Architekten with Studio-P
› Redshank; Essex, England, by Lisa Shell Architects with Marcus Taylor
› Shawm House; Northumberland, England, by MawsonKerr Architects
› No 49; London, England, 31/44 Architects
› The Cooperage; London, England, by Chris Dyson Architects
› Hidden House; London, England, by Coffey Architects
› Whole House; London, England, by Hayhurst and Co
› 6 Wood Lane; London, England, by Birds Portchmouth Russum Architects
› Highgate House; London, England, by Carmody Groarke
› Cob Corner; Devon, England, by David Sheppard Architects
› Hill House; Bath, England, by Mike Keys and Anne Claxton
› The Quest; Dorset, England, by Strom Architects
› Woodsman's Treehouse; Dorset, England, by Brownlie Ernst and Marks
› Oxfordshire Residence; Oxfordshire, England, by Richard Meier & Partners Architects with Berman Guedes Stretton
› Caring Wood; Kent, England, by Macdonald Wright Architects and Rural Office for Architecture
› South Street; East Sussex, England, by Sandy Rendel Architects
› Ness Point; Kent, England, by Tonkin Liu
› Newhouse of Auchengee; Ayrshire, Scotland, by Ann Nisbet Studio
› Edinburgh Rd; Edinburgh, Scotland, by A449 Architects
› Fernaig Cottage; Wester Ross, Scotland, by Scampton and Barnett Architects