Cost of project: £450,000
Set in a conservation area in Ealing, west London, Monument Cottage is a three-bedroom house on the plot of a house demolished in 1957. The design, by owner architect Joanna Rakowski, is energy-efficient and fully automated.
Best interior
What: 18th century cottage
Cost of project: £120,000
Fighting waist-deep damp problems and subsidence in an 18th century cottage in south Shropshire, owner architect Camilla Monk used local trades to transform the interiors of Mount Pleasant.
Best sustainable home
What: Passivhaus converted barn
Cost of project: £300,000
Chartered surveyor Richard Clayson converted a barn and adjoining cowsheds in East Sussex into The Old Byres, a low energy house while retaining much of the original external fabric of the buildings.