The house and the studio, two largely unaltered examples of Womersley's modular Modernist architecture, are separately listed in Category A, as "buildings of national or international importance".
Farnley Hey was awarded a RIBA bronze medal: it was given as a wedding present to Womersley's brother John, and is now listed at Grade II.
The estate lies near the confluence of Ettrick Water and the River Tweed, south of Galashiels, where Klein had acquired a mill to make the fabrics that he designed.
The main house is large, low rectangular building with a flat roof, constructed in Modernist style in a clearing on a sloping woodland site beside the A707 about 2.5 km (1.6 mi) north of Selkirk, looking east over the Ettrick Water towards the triple peak of Eildon Hill.
The separate internal areas for living, bathing and sleeping are denoted by panels of laminated glass (coloured vitroslab), with some bays filled with vertically boarded Makore.
The modular design was intended to permit further extension: part of the courtyard and pond were used to create an office space when the separate studio building was sold in 1982.
[4] The studio is separate rectangular two-storey building, also in Modernist style, on a sloping woodland site about 100 m (330 ft) south of the main house.
Its design incorporates elements of Frank Lloyd Wright's Fallingwater, combining the horizontal modular glazing adopted by Womersely in the main house at High Sunderland and for his own house at The Rig, with the concrete elements that Womersley used at the Gala Fairydean stadium at Netherdale in Galashiels and his 1963 Nuffield Transplantation Surgery Unit at the Western General Hospital.
With Klein's business in financial difficulties, the studio was sold in 1982 and used by Borders Enterprise for a short time as Textile Information Centre.
It was sold to a private owner in around 2000, and permission was given in 2006 to convert the studio to residential use, including adding a new structure to the roof, but it remains unused and in poor repair.