New Construction

  • Building Type : Hotel, boarding house
  • Construction Year : 2008
  • Delivery year : 2010
  • Address 1 - street : Avenue de la Chaise 35170 BRUZ, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 6 500 m2
  • Construction/refurbishment cost : 15 100 000 €
  • Number of Bedroom : 62 Bedroom
  • Cost/m2 : 2323.08 €/m2

Certifications :

  • Primary energy need
    55 kWhep/
    (Calculation method : RT 2005 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

The Residence « Domain of Cicé-Blossac Resort & Spa » is a hotel residence of 62 apartments located in the immediate vicinity of the Golf of Cicé-Blossac and a river. The charm of the landscape, of the preserved and magnified environment, reveals an ideal place to blossom in contact with nature.

Quietness of nature, charm of a reserved environment, the Domaine de Cicé-Blossac is a prestigious place, ideal for the organization of events, seminars or meetings.

The building is built on stilts both to cope with floods that may affect the land but also to keep a visual transparency of the landscape at ground level. This device sums up the spirit of the architect's intervention: to make environmental constraints an architectural asset.

The crucial point of the use of this site for residential purposes remains its floodable character with four major criteria:

  • free flow of water ;
  • guaranteeing the safety of goods and people ;
  • preservation of the fauna and flora ;
  • architecture blended into the landscape.

The floods, which occur on average every seven years, are between December and March. During this period, the practice of golf is slowed down but the hotel unit continues to welcome business customers. The residences must therefore remain accessible at all times, which implies the creation of outdoor walkways set on stilts.

The constraints become the source of creativity of the project and inscribe them durably in our landscape by valuing and integrating from its conception the environmental data.

The environmental qualities of the project are to be sought in a discreet integration into a sensitive natural environment: controlled visual impact and successful landscape integration.

  • The Domaine de Cicé Blossac won the International Special Environmental Prize at the Archizinc Trophy in 2010 ;
  • Selected for the Architecture Bretagne Prize in 2010.

Sustainable development approach

The project is part of an approach that respects the environment and the particular water landscape.

If the Cicé park seems to have always been a natural site, this appearance is actually deceptive. Before being occupied by a golf course and a hotel residence, it was a gravel pit that supplied the city of Rennes with building materials. The ponds of the park fill the old holes left in the ground by the excavations. In this place halfway between industry and nature, the architect sought to submit his architecture to the environment. This has resulted in an attention to eco-design perceptible in all aspects of the project.

  • Rainwater recovery is managed on the plot and the water is directed to absorbent landscaped valleys before being discharged into the water body.
  • The fauna that pre-existed on the site before the construction operation returned at the end of the work to nestle in their burrows on the ground. The open plan first floor allows animals to move freely on the ground without constraint or hasty cuts. Rabbits, coypu and squirrels amuse the hotel's guests with their newfound nature.
  • The birds have come to make their nests in the holes of the beams under the floor inhabited by man.

Architectural description

  • Construction in wood frame.
  • Sober and elegant architecture where wood predominates. The apartments, gathered in cottages on stilts, benefit from unobstructed views of the water and the golf course, which makes the whole site exceptional.
  • The natural color of the wood ensures integration into the landscape.

See more details about this project

Photo credit

Philippe Ruault
Video: Diadao



Construction Manager


    Structures calculist


    02 23 45 06 80

    Concrete design office



    02 99 34 90 86

    Environmental consultancy

    Société Hamel

    02 99 62 52 10


    Environmental consultancy

    Menuiserie Cardinal

    02 99 34 59 40


    Environmental consultancy


    02 99 83 55 88

    Safety and Health Protection Coordinator

    Environmental consultancy


    02 99 83 86 99

    Construction Economist

    Thermal consultancy agency

    Thalem Ingenierie

    02 99 05 30 10

    Environmental consultancy

    SOL Conseil

    02 99 31 77 07

    Geotechnical study office

Energy consumption

  • 55,00 kWhep/
  • 130,00 kWhep/
  • RT 2005


    • Electric heater
    • Individual electric boiler
    • No cooling system
    • Single flow
    • No renewable energy systems


    • Flooding/Slow flood

    Flood :

    Bruz, like all of Rennes Métropole, is included in the Areas at Significant Flood Risk (TRI). The rivers of the "Vilaine", and more particularly the "Seiche", due to the nature of its soil (schist), are concerned by these risks of flooding.

    Four floods caused by the overflow of watercourses occurred in the Vilaine basin during the winter of 2013-2014.

    To deal with the risk of flooding and make the Domaine's accommodation permanently accessible, we have created outdoor footbridges placed on stilts . Treated in wood with metal railings, they harmonize with the cottages. Fine, they slip into the landscape without disturbing it.
    The cottages themselves were built on stilts. All this facilitates the flow of water, ensures the safety of goods and people and respects the fauna and flora.

    The concrete pilings place the lower floor of each cottage 1.85m above the level of the 100-year flood, or almost 2.50m from the current flood.

    This construction in a flood-prone area ensures the safety of goods and people, by installing pathways on stilts allowing access for the emergency services even in times of flooding.

Urban environment

    The Domaine de Cicé-Blossac is located in Bruz, a few minutes from downtown Rennes.
    Close to the town's shops, it is nestled in lush greenery on the edge of the Golf de Cicé-Blossac.
    Easily accessible by public transport (2 bus lines serve it).

    • 5 minutes from Saint-Jacques airport;
    • 90 minutes from Paris by TGV;
    • 5 minutes from the exhibition center.


    Wooden walkways & stilts

    Gros œuvre / Charpente, couverture, étanchéité

    Footbridge established above the coast of the highest waters to ensure accessibility even during periods of flooding.
    Footbridge built on stilts, allowing the free flow of water.
    Walkway 1.80m wide and strong enough to support the passage of fire hose reels and people (firefighters and users).

Construction and exploitation costs

  • 15 100 000

Water management

  • 240,00 m3

Indoor Air quality

    Natural ventilation + simple flow ventilation.

    Through apartments allowing the natural ventilation of the accommodation.


    Regular maintenance of facilities.

    Acoustic insulation between dwellings.

    Larges baies vitrées sur la nature.

Reasons for participating in the competition(s)

Very many French municipalities are crossed by a watercourse or include a body of water on their territory, and it is quite naturally that these municipalities tend to seek an enhancement of these spaces . However, any development projects seem incompatible with the regulations in force in these sectors. In particular, Natural Flood Risk Prevention Plans (PPRI) generally introduce restrictions on the construction of new buildings in flood-prone areas . However, land development projects are an essential source of development and have a real capacity for innovation.

Through this application, we wish to show that construction is possible in wet and flood-prone areas , provided that the protection of property and people is respected, through designs adapted to the location.

The constraints become the source of creativity of the project and inscribe them durably in our landscape by valuing and integrating environmental data from its design.

Building candidate in the category

Prix Tertiaire & Industriel

Prix Tertiaire & Industriel

Trophées Bâtiments Résilients 2022
 building BBC tertiary building revegetation materials and solutions wood eco-design resilience 2022 Resilient Buildings Trophies

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Trophées Bâtiments Résilients 2022