A HOUSE with five-sided rooms is the latest building in Scotland to be given listed status by heritage chiefs.

The unusual building in East Kilbride was designed by pioneering Scottish architects Morris and Steedman.

Built in 1962, Calderstone' house was created in open farmland for Rozelle Holden who was a potter.

It features unusual five-sided wedge shaped rooms and an outside staircase leading to a separate pottery studio.

Built entirely on one level the house is designed in a spiral shape with rooms that get progressively bigger as you move through it.

James Shepherd Morris, who died in 2006, and Robert Steedman, 78, were known for designing open-plan living spaces with floor-to-ceiling windows, exposed stone, timber panelling and flat roofs and were praised for their radicalism and bold modernism.

There are now 16 listed Scottish buildings designed by the pair.

Robert, who still manages his own architectural practice, said he was delighted the building had been given listed status.

He said: "The house was quite radical for its time and it was a very happy commission to work on.

"Mrs Holden wanted her pottery to be separate from the rest of the house so we created an outside staircase that connects to an adjoining building.

"I think they found it quite a fun house to live in."

Although Morris and Steedman designed a number of large public and commercial buildings, the pair are best known for their domestic commissions.

Dr Deborah Mays, head of listing at Historic Scotland, said: "They made a very significant contribution to the development of architecture in Scotland and their highly original, cutting edge designs have inspired the work of many contemporary architects, not only in this country but around the world."

A recent survey by MORI revealed that 75% of the population consider it important to protect a nation's best modern architecture.