The Howard House, a modern steel-framed house in Kent by architect Michael Manser, has been listed as a Grade-II* building by the National Heritage List for England.

The house was built in 1969-70 by Michael Manser, working with the engineer Jack Dawson. The client was John Howard, an MP and Personal Private Secretary to Sir Edward Heath. Built on an elevated piece of land, the house has an exposed metal frame, bronze-tinted glass walls and a flat timber roof.

Michael Manser explored the possibilities of steel-frame construction for domestic architecture in the 1960s and 1970s, a technique pioneered by Mies van der Rohe. He is a past president of the RIBA, where he advocated Modernist architectural principles, and chairman of The Manser Practice.

Nearly 700 buildings have been added to the National Heritage List for England since post-war listing started 25 years ago. Just 5.5% of them are Grade-II*.

The Modern House sold the Mancett House in Wiltshire by Michael Manser, a large single-storey steel and glass house inspired by the Howard House.