Carmen Maurice Sinks a Trotter Racing Stable into a Windswept Mayenne Plateau

On an exposed plateau in northern Mayenne, Carmen Maurice Architecture has built a new racing stable for Standardbred trotters at Lassay-les-Châteaux. The brief came out of a practical problem. Two partners share the site, and the old buildings at its western entrance were cramped, short on stalls, awkward to work in and slowly falling apart. Rather than patch them, the client split the operation: one partner's horses move into the new 1,000 m² building at the north-eastern edge, and the historic structures are freed up for the other partner to renovate and keep. The training track and hay barn stay shared.

The interesting part is not the program, which is about as functional as rural architecture gets. It is the decision to treat wind, earth and horizon as design material. The Vannes-based practice cut the building into the ground, used the spoil to shape a future training straight, and held the roof to a single horizontal line that follows the land. The result is a working agricultural shed that reads less as an object on the plateau and more as a fold in it. That is a harder thing to pull off than it sounds, and we think it is worth a close look.

A Building That Ducks Below the Wind

Seen from across the fields, the stable is almost nothing: a long, low band with a pale roof sitting just above a grassy bank. The architects describe that roof as a line meant to merge with the sky, and in the overcast long view it nearly does. On a plateau where any vertical element catches both the eye and the weather, keeping the profile this low is a climate decision as much as an aesthetic one.

Sinking the walls into the site gives horses and staff real shelter from prevailing winds. It also solves the earthworks question neatly. The excavated soil is not trucked away; it becomes the training straight to the east. You end up with a stable and a track that were literally made from each other, which is the kind of closed loop rural projects talk about far more often than they deliver.

Timber Skin, Open Edges

Up close, the building is straightforward and well detailed: vertical timber cladding, rafter ends projecting past the wall line, a shallow pitched corrugated roof, and sliding slatted doors on the gables. Nothing tries to be a barn in costume. The language is that of a working farm building, refined at the joints rather than reinvented.

The key move is the gap. Because the walls sit down in the ground, a transparent strip opens between the solid base and the roof, so the landscape stays visible from inside. The end gable with its open central bay pushes this further, framing the fields straight through the building. For animals that spend much of the day in boxes, and for trainers who read the weather by looking at it, keeping that horizon in view is a genuine comfort, not a picturesque extra.

The Spine Where Horses Get Ready

The plan runs on a cross. Its north–south arm is the spine, and it carries the sequence that defines a trotter's day: care, washing and warm-up, then out south to the track, then back north to the walker after the session. Curved glulam arches span this aisle beneath translucent roofing, and the daylight that floods the concrete floor makes it feel more like a covered street than a corridor.

The axis also does organisational work. It splits the building into an active side and a quiet side for rest, so the noise and traffic of preparation never spill into the boxes where horses recover. This is the plan's quiet intelligence: circulation and acoustics handled by one gesture.

Wash Bays and Working Surfaces

In the wash bay, concrete partitions take the abuse while angled timber beams and translucent panels overhead keep the space bright. The material split is honest: hard, washable surfaces at horse height, warmer timber above where hooves and hoses do not reach.

The stall partitions follow the same logic. Concrete below, slatted timber above, so horses can see and smell their neighbours without sharing a wall they can damage. Sharp sun shadows across these surfaces suggest how much light the roof admits, which matters in a building that would otherwise be pushed into the ground and darkened by it.

Boxes Under the Eaves

The row of timber-clad boxes with galvanized frames is where the project shows its care for the people who use it. Horses lean out under the eaves, the overhang shades the openings, and the low dusk light runs along the facade. It is a calm, repetitive elevation, and repetition is right here: a racing yard runs on routine.

The western side of the cross holds the human program: staff rooms, parking, the farrier's workshop, feed store, sulky storage and tack room. Gathering the main flows of people and vehicles on one side keeps cars and deliveries away from the paths horses take to the track, a simple separation that many stables get wrong.

Plans and Drawings

The ground floor plan confirms the discipline of the scheme: two rows of boxes either side of a central spine, with service rooms gathered at one end. The cross section is the most telling drawing, showing how the building sits into the slope, with the roof held level while the ground drops away. The exploded axonometric lifts the timber roof frames off the plan to reveal the stalls, care zone, team space and the circular walker ring, making clear how much of the project is about sequence rather than form.

Why This Project Matters

Agricultural buildings are usually procured as kits and placed wherever the trucks can reach. This stable argues that a modest equine facility can be sited, sectioned and planned with the same rigour as a cultural building, and that doing so pays off in daily use: less wind, better light, cleaner circulation, and earthworks that feed straight back into the training program.

It also models a sensible approach to heritage on working farms. Instead of forcing a growing operation into failing historic structures, the project moves the demanding new uses out and lets the old buildings be restored on their own terms. For anyone designing in rural landscapes, the lesson is clear: read the ground, respect the horizon, and let the routine of the people and animals shape the plan.

Stable by Carmen Maurice Architecture, Lassay-les-Châteaux, Mayenne, France. Area: 1,000 m². Completed: 2026. Photography by Guillaume Amat.

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