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Under-stair toilet : turning a constraint into an asset

This article takes you inside a bold project: integrating an under-stair toilet, designed entirely with a 100% made-to-measure approach.
Far from being just a staircase, this layout transforms an often-restrictive volume into a functional, aesthetically pleasing space, seamlessly integrated into the interior architecture.

From the very first sketches, our clients expressed a clear desire for a bright, fluid, and multifunctional space, one that meets everyday needs without overwhelming the entrance hall.
Here, we reveal the uniqueness of this project and show how we successfully designed an under-stair toilet while preserving a contemporary, open, and light-filled stairwell.

Staircase and under-stair toilet: a clever, timeless combination

Custom-made suspended staircase with toilet and built-in furniture

The idea of combining a staircase and a toilet is not new. Many homeowners look to make use of the space beneath a first-floor staircase by integrating an under-stair toilet, a practical and relevant solution, especially in family homes.

This project, however, presented several challenges. The clients wanted:

  • an ergonomic, contemporary staircase,
  • a bright, spacious entrance hall,
  • A discreet yet comfortable under-stair toilet.

What makes this project unique is the choice of a suspended staircase, a more complex option when integrating an additional function beneath. The Canva suspended staircase was the natural choice. With young children in the household, the clients also valued the safety features of this model, thanks to its carefully controlled design and wrap-around railing.

A suspended staircase that lets the light in

Thanks to its riserless design, the staircase allows natural light to flow freely through the entire entrance hall, enhancing the sense of openness and brightness.

Custom-made suspended staircase with toilet and built-in furniture


The slim, graphic powder-coated steel structure visually lightens the space while adding a distinctly contemporary touch.
The solid bamboo treads create a subtle contrast, reinforcing the warmth of the project and echoing the design treatment of the under-stair toilet.

The staircase thus becomes a true architectural centerpiece, extending far beyond its primary function.

An under-stair toilet designed as a volume in its own right

To integrate the under-stair WC seamlessly, our designers conceived a uniform, comfortably proportioned unit that perfectly follows the geometry of the staircase.
The entire unit is made of wood, a deliberate choice that both:

  • Marks a clear visual demarcation,
  • Ensures aesthetic continuity with the stair treads.
Custom-made suspended staircase with toilet and built-in furniture

The treads extend into a custom-made box that encloses the room, while the risers subtly enhance the volume. Unlike a conventional drywall solution, the use of integrated wood panels saves space and delivers a premium, high-end finish.

All technical elements of the under-stair toilet, sanitaryware, washbasin, lighting, and storage units — are seamlessly integrated into the walls, ensuring perfect visual harmony. The result is a comfortable, warm, and intimate under-stair WC, where every centimetre has been carefully optimized.

Creating an upstairs office space: optimizing down to the last detail

The project doesn’t stop at the ground floor. Optimization continues upstairs, where the larger-than-average hopper offered untapped potential.
Our designers envisioned an additional platform to increase usable surface area, integrating a bespoke office space that perfectly fits the environment.

Custom-made suspended staircase with toilet and built-in furniture
Custom-made suspended staircase with toilet and built-in furniture

The staircase structure plays a key role in this solution: it supports both the floor extension and the desk attachment, reinforcing the overall rigidity of the construction. An intelligent approach, balancing technical precision with aesthetic appeal.

The desk features a generous work surface that extends seamlessly into the existing niches. It is anchored to the steel balustrade, echoing the aesthetics of the Canva staircase for perfect visual coherence.
The resulting space is bright, spacious, and highly functional, a true asset to the overall organization of the home.

Custom-made suspended staircase with toilet and built-in furniture

A tailor-made project, a holistic vision of the home

This project perfectly illustrates our approach: designing staircases that structure space while revealing the full potential of the home.
The integration of an under-stair toilet, combined with the extension of the first floor and the creation of a bespoke office area, demonstrates how thoughtful design can transform constraints into genuine architectural opportunities.

A prime example of made-to-measure design, where form, functionality, and comfort come together seamlessly.
Would you like to enhance your space with a custom staircase? Contact us today to book an appointment at our showroom.

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