A perforated steel stair distinguishes a 1970s house renovated by Archmongers


French & Tye

Archmongers’ renovation of an unassuming 1970s terraced house in south London is distinguished by a white perforated steel staircase. “The spatial layout of the house was unlocked by excavating the lower ground floor garage to create a new internal living space with doors directly into the (previously inaccessible) shared garden”, says the architect.


“As you enter the house, areas of intense colour have been used against a neutral backdrop of grey linoleum floors and the white steel perforated stair. The perforated steel balustrade opens onto a double height void bring a sense of light and space into the narrow plan”. Internal windows in the upper level walls and ceilings look into the stairwell, further visually connecting the spaces of the house.

The stair comprises treads of 4mm-thick folded and spot-welded perforated steel with 5mm-thick perforated steel banister panels edged with 40x6mm steel bars, and handrails made either of 40x6mm flat bar or 50x50mm box section steel.


On the lower-ground floor a bright blue kitchen creates a contrast with black quarry tiles, which are used for paving both internally and externally. The dining area has a four-metre-long built-in dining bench and a bespoke table, with recessed steel legs designed to work with a bench, and a recycled plastic surface.

While the interior of the four-storey house has been extensively remodelled, the exterior has been “lightly touched” to clean up and update the facade and brings light deeper into the core of the house.

Additional Images


Structural engineer
Foster Sturctures