Stairs · Collection

Stairs that float.

Sculptural steel staircases. Floating treads, folded plate and fine steel balustrades, engineered to disappear into the architecture. We make the steel structure and balustrade; timber treads are fitted by your builder.

Floating timber and steel staircase with under-tread lighting
Mt Pleasant House
Floating timber & steel · Christchurch

Bespoke steel staircases, engineered to the NZ Building Code

We design and build bespoke steel staircases, floating treads, folded plate and single-spine stairs, with fine steel-rod balustrades. We supply the steel structure and balustrade only; timber treads are supplied and fitted by your builder. Every stair is engineered to the New Zealand Building Code (including F4 barrier requirements) and made to order in Christchurch for homes across Canterbury, Nelson, Tasman and Marlborough, Queenstown, Wānaka and Central Otago, with delivery nationwide.

What types of steel staircase do you make?

Floating cantilevered treads stairs, and single-spine (mono-stringer) staircases, with fine steel-rod balustrades. We make the steel structure and balustrade; timber treads are supplied and installed by your builder.

Are your staircases code-compliant?

Yes. Every stair is designed to the NZ Building Code, including F4 fall-protection and barrier requirements. Your engineer designs the structure and provides the PS1 design producer statement, and we fabricate to that design and provide the PS3 construction producer statement.

Do I need a building consent for a new staircase?

A new staircase is normally part of the building consent for a new home or renovation, and your designer or council can confirm what applies to your project. Your engineer provides the PS1 for the design, and we provide the PS3 for the steelwork we fabricate.

How much does a floating steel staircase cost?

Every stair is designed for its space, so the price depends on the stair type, the number of treads, the balustrade, the finish and how the stair is supported. Send us your plans and we will give you a quote.

Can a floating staircase be added to an existing home?

Often, yes. Cantilevered floating treads need a strong fixing, either a reinforced wall or a concealed steel stringer, so the existing structure needs to be checked by your engineer first. A spine or stair is often an easier retrofit because it carries its own load.

What is a mono-stringer or spine staircase?

A spine (mono-stringer) stair runs on a single central steel beam, with each tread supported off it. The result is a very open, minimal stair that looks like it floats, without relying on a wall for support.

What finishes can steel stairs have?

Powder coat or paint in any colour. Black and white are popular, and we have made stairs in olive green to suit a timber-rich interior, like our Mt Pleasant circular stair. Treads are usually timber, supplied and fitted by your builder.

Can I see steel staircases you have made?

Yes. See our floating circular staircase in Mt Pleasant and our floating-tread stair in Cass Bay, both in Christchurch.

How long does a steel staircase take?

Every stair is made to order, so timing depends on the design and our workshop schedule. We will give you a timeframe with your quote. Talk to us early in your build so the stair is ready when your builder needs it.

Do you make stairs for Queenstown and Wānaka homes?

Yes. We design and make steel staircases in Christchurch for homes across Queenstown, Wānaka and Central Otago, as well as Christchurch and Canterbury, Nelson and Marlborough, and nationwide, and coordinate delivery with your builder.

Do you make steel staircases for Nelson and Marlborough homes?

Yes. We design and make steel staircases and balustrades in Christchurch for homes in Nelson, Richmond, Blenheim and across the Tasman and Marlborough regions, and coordinate delivery with your builder.

Do you install outside Christchurch?

We make every staircase in Christchurch and deliver nationwide, including the North Island. Regular projects across Christchurch and Canterbury, Queenstown, Wānaka and Central Otago, and Nelson, Tasman and Marlborough. Installation is by your builder or one of the trusted subcontractors we work with, and we coordinate delivery to suit your build programme.

Can you make just a steel balustrade?

Yes. We make steel balustrades and handrails for new and existing staircases, decks and voids, in flat bar, rod, blade or with glass, powder-coated or wet-painted to any colour, and we can match an existing stair.

Can a steel staircase be used outside?

Yes. Exterior steel stairs and balustrades are made in galvanised and powder-coated steel or corten, designed for weather and, for Queenstown and Wānaka homes, snow and ice. We detail drainage and non-slip treads to suit.

Engineered by Bromley Steel

Three decades of structural steel, behind every weld.

ARC is the design studio of Bromley Steel. So every piece is backed by a commercial fabrication shop, certified welders and engineering sign-off. Beauty you can specify with confidence.