Hampstead Staircase

Patalab Architects and KPM Construction, London

This elegant three story staircase is a central feature for a commercial development designed by Patalab Architects.  Working closely with architect and principal contractor, KPM Construction, we took a lead on fabrication from design development to installation.  

To develop the fabrication design, our team used parametric modelling to resolve the complex helical geometry of the staircase. Additional design features were rationalised with the architect and structural engineer, including overlapping folded treads with slim balustrade spindles that act as stiffeners for the overall structure.  

At fabrication stage, this elegant staircase demanded attention to detail in construction and finishing. Each spindle passes through a bespoke 40mm block—cut to different lengths to match the rake of the handrail and shaped to follow the radius of each folded tread. Exposed welds around the base of the spindles create an industrial aesthetic.

While all tread sections were prefabricated at our studio, the rolled steel handrail needed to be welded on-site once the stairs had been lifted and fixed into position. The beautifully sculpted structural joints were then polished out and hand-finished with a blackening patina to create a smooth, continuous line that flows over three floors.