Outdoor Spiral Staircase | Custom by DBM Factory

Outdoor Spiral Staircase

The outdoor spiral creates a beautiful vertical line in tight outdoor spaces. Its round shape sits comfortably where a straight stair would dominate. Think deck corners, garden routes, rooftop terraces, mezzanine entries above a garage.

We design and produce each spiral around your project. Share a sketch, a photo, or a design reference. We turn it into the working drawing and build the stair ready for shipment.

Choose the Right Finish for Your Site

Where It Fits — Four Common Project Types

From Sketch to Site — Three Stages

After delivery, your contractor or installer handles fitting. We provide an assembly guide and a step-by-step video. Where local installation is available in your region, we can help you find a vetted installer.

Outdoor Spiral Staircase

When Two Outdoor Levels Need to Meet — Garden Grade, Raised Deck, and Rooftop Access.

A round outdoor stair earns its place when two levels sit one above the other and the connection between them is missing. The garden sits below, the deck rides above, and the only route across is a long ladder or a detour around the house. A helix configuration folds that climb into one tight vertical column, so the surface at each elevation stays open and usable.

Owners usually reach us once both levels already exist in finished condition. The terrace stands complete, the rooftop carries its surface, and the vertical link between them is the one element still missing. So the brief rarely concerns the staircase in isolation. It concerns joining one outdoor surface to another without surrendering the ground that each level genuinely needs.

Why the Climb Decides the Build, Not Just the Look.

The two surfaces define the whole configuration before anyone selects a finish. A short hop from a lawn up to a low deck is a gentle, easy climb. A full storey from a courtyard up to a rooftop is a taller transition, and the structural column underneath has to carry that heavier vertical load with confidence.

What sits underfoot at each landing matters as much as the dimension between them. A staircase landing on soft garden soil needs a wider structural footing than one bolting onto a finished concrete deck. A rooftop exit also has to clear the parapet cleanly, so the upper tread meets the deck elevation without an awkward final step.

So the right answer depends on the two specific levels in front of us. We study where the staircase begins, where it lands, and what material forms each surface, before we draw a single line. The appearance simply follows once that practical groundwork settles.

How the Same Stair Adapts to Each Pair of Levels.

Garden Grade Up to a Deck.

The lower end rests on the ground, so the foundation detail carries the whole question here. Soft soil or a planted bed asks for a broad structural base plate, seated on a small pad that distributes the weight evenly. The staircase rises from there into the deck edge, and the working drawing resolves that base configuration to suit the ground you genuinely have, never a generic flat slab.

A Raised Deck Up to a Rooftop.

Here both ends are solid, yet the climb is taller and the exit needs careful consideration. The top of the helix has to clear the parapet and arrive level with the roof deck, so nobody meets a surprise step at the summit. We position the exit point and the final tread against the upper structure, so the transition finishes flush and sure underfoot.

A Single Villa vs Repeated Units.

A one-off villa stair suits one garden, one deck, and one sightline precisely. A multi-unit development quietly reverses that logic. The same diameter and tread count then repeat from unit to unit, so an owner-developer can order a matched configuration in a single batch. We settle the drawing once and carry it cleanly across the whole set.

What Coordination Looks Like Between Two Surfaces.

Drawing-First Coordination begins at the two elevations and the gap between them. We pin down the lower foundation, the upper landing, and the exact climb before we cut any metal. An outdoor deck rarely sits dead level, so the working drawing resolves those structural quirks on paper first and saves a scramble on site later.

Trial Assembly Before Packing then stands the whole spiral upright across our Guangdong workshop floor. We confirm every fit, photograph the result, and take the stair back down for transport. We label each part as it comes apart, so the build on your deck becomes a clean bolt-together job instead of field welding in the open air.

Export-Ready Crating packs the parts in the order your installer will raise them between the two levels. We wrap the outdoor finish against knocks and salt spray for the long ocean passage. The crate then arrives ready to open and stack, with the heaviest pieces seated low for a safe lift.

What to Send Us About Your Two Levels.

A rough sketch or a quick phone photo of both surfaces gives us plenty to begin with. Add the floor-to-floor height, which is simply the climb from the lower surface up to the upper one. Then note the clear circle you can spare for the stair, bounded by the rail, the wall, or the planting nearest to it.

One more line of detail helps us read each landing. Tell us what the lower end lands on, whether soil, paving, or a finished deck, and how the top meets the upper level. From there we turn your notes into a working drawing and a stair ready to ship.

After delivery, fitting is on your side — on site, your contractor or installer handled fitting directly from our drawings. Follow our assembly guide and step-by-step video, or use your own local installer where needed.

Compare the Metal Staircase Outdoor → · see the Prefab Stairs Exterior → · browse the full Outdoor Staircase range → · or explore all our staircases →