Maison du partage (House of sharing)

New Construction

  • Building Type : Collective housing > 50m
  • Construction Year : 2018
  • Delivery year : 2020
  • Address 1 - street : 52 Avenue Louis BOUCHET 17200 ROYAN, France
  • Climate zone : [Cfc] Marine Cool Winter & summer- Mild with no dry season.

  • Net Floor Area : 1 362 m2
  • Construction/refurbishment cost : 1 804 000 €
  • Cost/m2 : 1324.52 €/m2
  • Primary energy need :
    -82 kWhep/
    (Calculation method : RT 2012 )
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 Federation of Public Utility Habitat et Humanisme (habitat and humanism) has been working for 25 years in favor of housing and integration of people in difficulty. Aware of the increasing precariousness of retired people, the difficulties of juniors to leave their parental home to become independent, the particularly heavy isolation of single-parent households (mainly single mothers with young children), HABITAT ET HUMANISME has developed, for a few years, intergenerational residences to welcome these people in a situation of isolation, sometimes heavy and destructuring, by providing them with a new living space that favors the rebuilding of a meaningful social link and that is close to the family structure.

A place that is open to the city, combining residential and transitional housing with services and activities.

Our intergenerational projects are based on a deep conviction : in order to move towards more solidarity, more citizenship, there is today a strong obligation to think differently about "living together".

The programming we propose is based on a humanist vision, at the heart of a collective dynamic associating :

People of modest means with a mix of ages
o Non-dependent seniors (at entry) in a situation of isolation and/or with low resources

o Young people (students, apprentices, working people, unemployed);

o Single-parent families with 1 or 2 children (primarily under 3 years old).

Housing that is open to the neighborhood and the city
o Individual housing to respect the need for privacy, shared spaces

o and, as much as possible, spaces open to the city.

Housing at social or very social rents adapted to ageing or disability, to stabilize or to rebound.
Services and adapted support
o Shared service spaces will be offered,

o Support for the organization of the collective and the participation of the inhabitants will be offered by a team of volunteers, supported, if possible, by salaried work.

An enabling environment :
o Inter-associative and inter-institutional links will be created to anticipate departures,

o Meeting places will be open to all residents

o An integration restaurant open to the neighborhood with the involvement of the residents

An innovative project
o A dynamic of participation of all the inhabitants will be initiated,

o On more specific problems (and in particular the arrival of dependency for the elderly), a mutualization of means will be tested to follow the evolution of the people and to allow them to remain in their housing,

o The initiation of young people to cohabitation with the elderly and single parenthood,

o The creation of links for sharing experiences and awakening solidarity,

o The accompaniment towards autonomy and the exit towards a perennial housing for the juniors and the single-parent families,

o Solidarity savings, corporate sponsorship and citizen participation will be mobilized in the setting up and life of the project.

Data reliability

3rd part certified



    Louis BOUSQUET

Construction Manager


    Philippe SEGUIN




    Nicolas VAAST

    Prefabrication of frame and timber frame walls

Contracting method

Separate batches

Owner approach of sustainability

The search for environmental, user-friendly, architectural quality at controlled cost has been the DNA of EDEN PROMOTION since its creation (we notably delivered the operation of the TOUR CARREE (square-shape tower), awarded in 2020).

EDEN PROMOTION is resolutely committed to a process of quantifying, reducing and compensating for all of the GHG emissions caused by our activity and our projects.

To achieve this, we have, among other things, relied on PROMOTELEC to certify the life cycle analysis of the most ambitious projects, to build skills in order to generalize this approach to the majority of our programs.

The MAISON DU PARTAGE, a program of 27 new collective housing units (R + 2), is part of our pilot operations with a certified E3C2 objective. This is the first program on which we are using so many bio-based materials.

Architectural description

See details below

If you had to do it again?

With a little more money, the moldings, the balconies and the facades could have been made of wood. Today, an equivalent program would be carried out within the framework of the BDNA approach, in particular to communicate on the technico-economic feasibility of a collective new housing building E3C2.

Energy consumption

  • -82,00 kWhep/
  • 67,00 kWhep/
  • RT 2012

  • -11,00 kWhef/
  • In kWhEP / (m².year) - Heating = 20.1; ECS = 26.8; Ecl = 3.9; Aux = 3.6PV = 137.1

    Consumption monitoring with LEGRAND ECOCOMPTEUR wired to the common box. Consumption monitoring planned for 2 years / device being received.

Envelope performance

  • 0,46 W.m-2.K-1
  • 0,68
  • I4

  • 0,31
  • REX in progress


    • Electric heater
    • Other hot water system
    • No cooling system
    • Humidity sensitive Air Handling Unit (Hygro B
    • Solar photovoltaic

GHG emissions

  • 160,00 KgCO2/m2/an
  • Ice data excluding GHG benefits (-74 partially linked to PV)

  • 787,00 KgCO2 /m2
  • 50,00 an(s)
  • 990,00 KgCO2 /m2
  • E + C- standard / E3C2 certified project by PROMOTELEC

Water management

  • 91,00 m3
  • Reduction of water needs (hydro-saving devices, landscaping with low water needs).
    Rainwater recovery and storage (20m3)
    EP use for watering green spaces and double water network supplying WC and ML.

Indoor Air quality

    TIPEE mission / recommendation dedicated to improving indoor air quality and control measure at reception in 3 model homes.

    Analysis of the data from the measurement campaign confirms the sanitary quality of the program and confirms its reproducibility.

Health & Comfort

    Programmatic choice to have 100% North / South oriented through-housing with adequate solar protection.


Construction and exploitation costs

  • 92 000

Urban environment

Public transport, shops, activities and services nearby.

Land plot area

2 980,00 m2

Built-up area

496,00 %

Green space

1 412,00

Parking spaces

yes: 394 m² or 29 places

Building Environmental Quality

  • indoor air quality and health
  • comfort (visual, olfactive, thermal)
  • water management
  • energy efficiency
  • renewable energies
  • maintenance
  • building process
  • products and materials

The operation LA MAISON DU PARTAGE is operated by Habitat & Humanisme. Its allocation to EDEN PROMOTION, on a competitive basis, results from a much more ambitious environmental offer than the programmatic requirements.

The strengths of this project are:


- Wood frame mantle walls with cellulose wadding and wood fiber insulation (Financing of an FDES sheet on behalf of the industrialist SYBOIS / prefabrication of wood frame)

- Recovery of rainwater (20m3) for watering green spaces (including shared gardens) and supplying toilets in the 27 housing units

- Quality approach and control of Indoor Air Quality in collaboration with the TIPEE platform

- BIM + 4D planning

Contest categories

Bas Carbone

Bas Carbone

Green Solutions Awards 2020-2021 / France

 Intergenerational residency
 Habitat Humanism
 low carbon

Author of the page

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    Green Solutions Awards 2020-2021 / France