66, Frognal

No. 66 Frognal is a detached house located on a corner site, built between 1937 and 1938 by architects Colin Lucas, Amyas Connell, and Basil Ward. The structure features roughcast on a reinforced concrete monolithic frame, with floors supported by freestanding reinforced concrete pilotis. It has a flat roof that overhangs the second floor, and post-war alterations include the infilling of a sundeck on the top floor by Trevor Dannatt.

The house is three storeys high and has a continuous strip of 13 windows across the facade. The main facade features a projecting central rectangular staircase that reaches full height, with glazed rectangular panels on each side. The ground floor on the left includes an open carport with a garage, while a staircase on the far left leads to the first-floor entrance, which is covered by a plain canopy. The right side of the ground floor is glazed. The upper floors are characterized by continuous strips of large pane sliding windows, with round tie-plates above the first-floor windows and slightly recessed second-floor windows. The right-hand return has a glazed, recessed ground floor, with the upper floors supported on pilotis and featuring a continuous raked flower trough, along with a small rectangular window on each floor. The rear elevation includes a staircase leading to a first-floor terrace with tubular railings, a central plate-glass bay, and a strip window bay to the left. The second floor has a continuous balcony with tubular railings, and the two left-hand bays feature plate-glass French windows that are overhung by a flat roof.

The interior has not been inspected. Historically, this building is recognized as a pioneering work of the Modern Movement in the UK. Connell and Ward were early admirers of Le Corbusier, and Lucas, similarly influenced and frustrated by traditional builders, established his own company to explore reinforced concrete designs. Together, they collaborated from 1933 for six years, producing a series of houses that were unmatched by contemporary firms.