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Plantassage, Sierre

Plantassage, Sierre
Plantassage, Sierre — 1
Plantassage, Sierre — 2
Plantassage, Sierre — 3
Plantassage, Sierre — 4
Plantassage, Sierre — 5
Plantassage, Sierre — 6

The new Glarier-La-Croix–Plantassage neighborhood serves as the city’s new gateway, located west of Sierre and in the heart of Valais. As provided for in the current PAD since 2019, three residential buildings, each featuring a commercial ground floor, are being built at the foot of a vineyard-covered hillside and aligned along the cantonal road.

On the downtown side, the existing tree line is extended, and a new pedestrian walkway runs alongside the new retail spaces. A service road provides safe access for motor vehicles and cyclists from the main road to the underground commercial and private parking garage. On the town entrance side, a stone retaining wall is preserved to maintain the landscape’s continuity toward the vineyards: the third building blends seamlessly into the landscape, is situated higher up, and offers private gardens to the first apartments.

Between the buildings, stairways lead pedestrians to the play and recreation areas located at the rear of the site and bordered by a large orchard. Two walkways provide access from the north to the apartments (primarily 2.5-room units intended for rental), which feature balconies or loggias on the south side, offering beautiful views of both valley floors. On the walkway side, a spacious entryway can accommodate a home office for occasional remote work.

A continuous dual structural framework across the three buildings ensures visual continuity across all three facades, which are subtly differentiated by balcony-loggias that project outward (in the building without retail spaces) or by loggias that lend a more urban character (in the buildings with retail spaces). This system allows for flexibility in the mix of rental apartments: it is possible anywhere to combine a studio with a 2.5-room apartment to form a 3.5-room apartment.

The neighborhood’s energy supply is entirely provided by renewable energy sources. Photovoltaic panels installed on the roofs generate a large portion of the neighborhood’s electricity, while heat pumps power the heating and domestic hot water systems.

mandate type: direct mandate

client: NOGA Développements Immobiliers SA

period: 2025 - ongoing

program: 3 residential buildings comprising 104 units and a 1,300-square-meter ground-floor retail space

services provided : preliminary studies, preliminary design, construction design, architectural and landscape design, public notice application, handling of objections

architecture and landscape: Raum404

mobility: Viatron

geotechnical engineering: Charly Berthod

physics: Amstein+Walthert Lausanne

structure: Crettaz & Partenaires

MEP: VHTechnic

fire protection: Richard Conseils & Associés

acoustics: Bisson acoustique

geometer: IG Group

environment: Impact

images: TheThird

project lead: Oscar Buson, Charlélie Michel

site area: 7'000m2. Determinant floor area 8407m2


Building permit obtained