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Bespoke Staircases

Case Studies

Le Petit Fort, Jersey

Spiral UK were commissioned to create the feature helical staircase, concrete spiral stair and external straight stair for this unique residential property on the west coast of Jersey, a stone’s throw from the island’s spectacular beaches.

The property was designed with two accommodation wings around the central feature helical stair.

residential curved staircase with timber treads
residential curved staircase with timber treads

The awesome natural setting and the thick granite walls of the property inspired Spiral UK to create a luxury staircase design that fully complemented its surroundings.

The property was a Channel 4, Grand Designs featured project. The architectural design was the winner of the RIBA Regional Awards 2016 and was on the shortlist for House of the Year 2016.

Le Petit Fort, Jersey
Helical Staircase, Spiral Staircase and External Straight Staircase
Hudson Architects
Main Contractors:
Mitchell Construction Group

The feature helical staircase

The dramatic helical staircase is a real feature of the property and fits perfectly with its interior style. Providing access to the living spaces on the first floor, this bespoke staircase has beautiful oak treads, risers and handrail. The stair was created out of Corten steel, which was left to weather outside before being installed, bringing a sense of the building’s external materials inside.

Guide price


At a glance

Floor to floor height: 3015mm
Risers: 15 @ 189.1mm with oak veneer
Tread width: 15 @ 1200mm wide
Tread type: Smooth steel plate with solid oak overlay
Stringer: Corten stringers
Balustrade: Inner stringer extends to 900mm above pitch line of staircase to form balustrade
Handrail: 47mm oak
Additional: LED lighting strip to outside stringer
Timber tread curved staircase

Spiral Staircase

The spiral staircase is an escape stair concealed behind a curved wall. Called the ‘secret stair’, it is completely hidden from sight. This bespoke staircase is made of beautiful polished white pre-cast concrete with handrails set into the wall, leading people between the second floor and the ground floor.

At a glance

Floor to floor height: 3028mm
Risers: 14 @ 215.36mm 14 @ 217.86mm
Tread width: 27 @ 920mm radius
Tread type: White fair faced concrete
Handrail: 38mm satin polished stainless steel fixed to the wall

External Stair

Outside the property, the straight external steel staircase gives access to the walled courtyard.

At a glance

Floor to floor height: 3215mm
Risers: 21 risers @ 153mm
Treads: 1200mm wide iroko timber treads
Handrail: Oval profile iroko
Balustrade: Stainless steel woven mesh infill panels
Stringer: Mild steel
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