Indoor Spiral Staircase | Custom by DBM Factory
Indoor Spiral Staircase
An indoor spiral staircase does two jobs at once. It gives the upper floor honest access in a tight footprint, and it gives the room a sculptural object that wasn't there before. The same helix that frees up the floor plan also becomes a design feature in the foyer or the open-plan living space.
We design and build each interior spiral around your drawing. Share a sketch, a photo, or your architect's plans and we turn it into a working drawing and a stair ready to ship.
Configure the Spiral for the Room
Stringer Type — Centre Post / Helix Outer
Single centre post is the classic indoor spiral — clean, compact, the most predictable footprint. A continuous outer helix stringer is available for the larger feature spiral where the structure itself is the design.
Tread Material — Hardwood / Stone / Steel
Solid hardwood for the warm interior. Honed stone for villa entries. Powder-coat steel plate where the spiral belongs to a modern loft and the metal is part of the language.
Finish Options — Powder-Coat / Stainless / Bronze
Matte black or soft grey powder-coat for the modern interior. Brushed stainless for a lighter foyer read. Antique bronze where the home has a more traditional palette.
Railing Style — Picket / Cable / Glass
Slim vertical pickets for the classic spiral look. Cable infill for a modern open read. Curved glass where the spiral is the centrepiece and sightlines matter.
Where It Fits — Four Common Project Types
Apartment & Duplex Interior
An internal spiral staircase between duplex floors, mezzanine bedrooms, or a private upper level. The footprint stays small, the apartment keeps its living area, and the spiral becomes the feature of the floor plan.
New Home Loft Access
For homes where the upper loft is part of the open-plan living room. A spiral keeps the climb compact and tied into the architecture rather than carved out as a separate room.
Villa Mezzanine & Library
When the villa has a mezzanine library, a private study above the main floor, or a guest space tucked under the roof. An interior spiral makes the upper level feel intentional — a designed object rather than a hidden stair.
Renovation & Interior Conversion
Where the renovation adds an upper level and floor space is the constraint. A spiral fits where a straight stair would consume a room — converting attic, basement, or above-garage into living area.
From Sketch to Site — Three Stages
Share a sketch, photo, or your architect's plans — that's enough to start. We turn it into a working drawing covering the diameter, the stringer type, tread layout, railing style, and the connections at top and bottom landing.
Every spiral is fully dry-assembled and photographed in our Guangdong workshop. Tread fit is checked one step at a time, the finish is applied, and the helix is reviewed end-to-end before being broken down for shipping.
Wooden crates built for ocean freight, with the finish protected and the components packed in the order your installer will assemble. Shipped to 60+ countries — including the USA, Australia, the EU, and across Asia.
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.
Indoor Spiral Staircase
When the Hard Part Is Where It Goes — Placing a Round Stair Inside a Finished Room.
A round stair indoors rarely sits in an empty shell. It usually has to find a home inside a room that already works, beside the sofa, the bookcase, or the kitchen run. So the real puzzle is seldom the climb itself. It is precisely where the circle can land without unsettling everything around it.
Owners usually reach us with the upstairs decided but the position open. They know the upper level needs proper access. What they are weighing is which corner of the living space can surrender a circle of floor, and how the household keeps moving comfortably once the stair occupies it.
Why Placement Decides More Than the Stair Does.
A round stair behaves well indoors because it lands the upper-floor opening directly above its own footprint. The climb rises within a single circle, so it tucks into a corner that a straight flight could never reach. That compactness is exactly what frees the rest of the room to carry on as before.
The position then sets the daily experience far more than the dimensions do. A stair against a wall keeps the centre of the room open and reads quietly. A stair near the middle becomes a visible pivot the household moves around, which suits an open plan but demands honest clearance on every side.
So the early conversation maps the traffic before it settles the stair. We trace how people already cross the room, where they pause, and which sightlines genuinely matter. Only afterwards does the working drawing commit the circle to a particular spot.
How the Same Stair Sits Differently Around the Home.
A Tucked Corner vs an Open Pivot.
The chosen spot quietly decides how present the stair feels day to day. Pushed into a corner, the helix recedes and the surrounding floor stays generous and uninterrupted. Set nearer the centre, the same helix turns into a sculptural pivot, anchoring the open plan while asking for a clear approach on every side.
A Quiet Bedroom Climb vs a Busy Living Hub.
The room beneath the upper floor shapes how hard the stair gets used. A private climb to a single bedroom carries a calm, occasional rhythm. A stair rising from the main living hub instead handles constant passage. The approach then wants extra room, and the entry point sits where it never blocks a doorway or a daily route.
A Fresh Build vs a Lived-In Conversion.
An empty new build offers freedom that an occupied home simply cannot. Drawn early into a build, the opening lands wherever the plan prefers, and the stair leads the layout. Slotted into a finished room instead, the helix has to respect the existing floor, the upper joists, and the furniture already settled into place.
What Coordination Looks Like for an Interior Helix.
Drawing-First Coordination begins with the spot itself and the opening above it. We pin down the floor levels, the upper-floor edge, and the clear circle the room can spare before any metal is cut. The exact position is settled here, so the approach stays open and the entry point avoids the daily routes through the room.
Trial Assembly Before Packing then stands the whole spiral upright across our Guangdong workshop floor. Our team confirms the tread fit one step at a time, applies the finish, and reviews the helix turn by turn beneath our own roof. We photograph the result and take it apart with care, labelling every part for a clean rebuild on your side.
Export-Ready Crating afterwards protects the finished surface against knocks and moisture across the long ocean passage. We pack the parts in the exact order they reassemble, seating the heaviest pieces low for a stable lift. The crate then arrives ready to open, sort, and stack straight against the working drawing.
What to Send Us About the Room.
A rough sketch or a quick phone photo of the room gives us a solid starting point. Add the floor-to-floor height, which simply means the climb from the lower finished floor up to the upper one. Then note the clear circle you can give the stair, bounded by the nearest wall or whatever furniture sits closest.
One further note helps us place the stair well. Tell us where the upper opening can sit, and how the household tends to move across the room below. Mention any furniture that has to stay put as well. 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.
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