Atelier Archiplein . Perraudin Architectes . photos: © Leo Fabrizio
Standing at the edge of the agricultural belt surrounding Geneva, these two buildings take full advantage of a privileged location offering broad view overlooking fields, vegetable gardens and further, Salève mountain. Promoted by the municipality of Plan-les-Ouates, this project, chosen through a competition, consists of the construction of 68 units of rental and first-time buyer social housing.
The aim of this project is to demonstrate the economic and constructive feasibility of building in solid stone in the Swiss context. Based on the strength of concept, the project is expressed in a simple and rational architectural language with a plan comprised of three successive rings. Entirely built with solid blocks of stone, these buildings have no concrete loadbearing elements. In both the common areas and the flats, the loadbearing rings are left in a raw state. The sone-setting of the walls composed of four 190×80 cm blocks imposes the format, suggests the intention behind the implementation, reveals traces of the saw and especially, exposes the different ancient forces of which it is comprised. Building with natural materials is the opportunity for Archiplein to test the current mode of building production against the yardstick of environmental and climate issues.
The understated façades present ornamental elements that reflect technical necessities, such as, for example, the cornice that repels rainwater well away from the façades and underscores by the shadow it casts the floors and the hollowing out treatment of the façade by means of an inward-facing corner. During showings, visitors are often observed running their fingers across one of the 10,000 blocks of stone or remarking with amazement the cool ness of the façades despite high exterior temperatures.
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Solid stone
Two blocks of flats and shops in solid stone
Plan-les-Ouates, Switzerland (GE)
Chemin de l’essartage, 1228 Plan-les-Ouates (GE), Switzerland
68 flats for first-time buyers, social units (PPE, HM, LUP) and commercial spaces
Client and owner : Municipality of Plan-Les-Ouates
Architects : Perraudin Archiplein Consortium
Construction managment : Architech
BET Structure : Perreten and Milleret
Building physics : Energestion
Acoustician : AcouConsult
Structural work : Marty construction
Resource : Careers in Provence and France Pierre
Materials : pierre de Brétigny, de Migné and d’Estaillades
Surfaces : 12 500 m² SDP
8 000 m² of floor space
2 000 m3 of solid stone : 9 000 blocks
Cost : €24,000,000 excl. VAT
Environmental performance : THPE label
Competition : 2016
Delivery : 2021
Photo credits : © Leo Fabrizio
