A helical staircase is a continuous double curve — a sculptural form that rises through a home the way a line of music rises through a room. At Supreme Modern Stairs, one Toronto studio carries each commission from the first hand drawing to the final fitted tread: we design, forge, and install under a single roof, and we accept a limited number of commissions at a time so that nothing is hurried. The work begins with a complimentary in-home consultation. From there, hand drawings become a 3D model, refined with you — changes are free until you approve. Then the forge takes over. There is no veneer here, no laminate, no composite; only solid material, shaped slowly, installed in days.
Design & Engineering
A helical stair is often mistaken for a spiral, but the two are structurally distinct. A spiral winds around a central column; a helical stair has none. Its stringers curve in two planes at once — sweeping in plan while climbing in section — so the geometry is a true double curve, and every component along it is unique. No two treads share a template. The handrail must be shaped as a continuous helix, its pitch and radius shifting together, which is why we forge in-house rather than order from a catalogue. Each stair is drawn by hand, then resolved as a 3D model, with revisions free until you approve. Only then does fabrication begin — one form, resolved completely, before a single piece of metal is bent.
Materials
The Helical collection works in three materials that reward the curve. Solid brass, hand-forged from rod and plate, becomes the balustrade and rail — a living metal that oxidizes into a warm patina unless lacquered, offered polished, brushed, or antiqued. Walnut treads are quarter-sawn from North American stock for dimensional stability, a discipline the double curve demands; the grain carries rich chocolate undertones and a subtle ray-fleck figure that catches light as the stair turns, aging to warm amber under an oil finish. For the ground the stair rises from, or the treads themselves, Calacatta marble quarried in Carrara: a bright white field with grey and gold veining, each slab individually selected and book-matched when possible, so the stone's movement follows the stair's.
Solid Brass · Walnut · Calacatta Marble
Selected Work
Commissioning
A helical stair is commissioned by people who want the centre of the house to hold something worth looking at. It suits a double-height foyer or an open plan, where the curve can be read whole from below and from across a room; sightlines pass through it rather than stopping at it, and daylight moves around the form through the day. Underfoot, solid walnut on forged metal is quiet — no hollow note, no flex. It is the kind of work a house keeps: a permanent architectural asset rather than a finish. We build them across Toronto, Mississauga, Oakville, Vaughan, Markham, and Richmond Hill, with most commissions moving from first consultation to installed staircase in six to ten weeks.
From $10,000
Project pricing
6–10 weeks
Consultation to install
1-year warranty
Insured · WSIB covered
Or call +1 (647) 710-0111 — complimentary in-home site visits across Toronto & the GTA.