The Mahots

7751 Last modified by the author on 11/05/2020 - 12:19
  • Building Type : Collective housing < 50m
  • Construction Year : 2017
  • Delivery year : 2018
  • Address 1 - street : 6 rue Joseph Richard 97420 LE PORT, France
  • Climate zone : [Aw] Tropical Wet & Dry with dry winter.

  • Net Floor Area : 3 737 m2
  • Construction/refurbishment cost : 4 750 000 €
  • Number of Dwelling : 45 Dwelling
  • Cost/m2 : 1271.07 €/m2
  • Primary energy need
    92 kWhep/
    (Calculation method : RTAA DOM 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 project relies on urban studies, revealing its objectives of limiting the built front and porosity towards the main road. It must therefore treat an orientation of the facades unfavorable to a solar track , by proposing light wood facades, by setting up corridors supporting vegetation protecting low and hot summer rays . The landscape defines the common spaces, the footprint in the ground is found at the level of the floors, allowing all to have external surfaces. He tackles a difficulty, that of managing acoustics in traversing buildings by setting up a system of non-linear anti-noise walls .

Sustainable development approach of the project owner

The project is not part of a certification process but integrates bioclimatic constraints to offer a project respectful of its environment. The reasoned implementation on the plot makes it possible to manage the acoustics as well as a powerful natural ventilation of each of the dwellings. Investment, both financial and temporal, in the landscaping project including participatory vegetable gardens, provides a living environment as pleasant as possible for the inhabitants of this social operation.

Architectural description

In order to respect the orientation recommended by the developer and to minimize the impact of RN1E on housing, the buildings of the operation are oriented East / West. The operation is served internally by the internal route of the ZAC (activity zone) to the north. The differentiated accesses and vehicles are made by this street. To the south, a pedestrian access connects the C4 Island to the future TCSP. The project includes 45 housing units spread over 3 blockssen R + 3. Each block composed of two frame bodies is articulated around a central vertical circulation connected to a remote hallway on each floor. The building bodies in the North are on stilts, thus placing part of the parking lots under construction. Those located in the south host in the DRC large typologies of housing and their private gardens. The 33 air and covered parking spaces for some are spread over the northern half of the plot. The project is organized around stacked housing typologies and all through. The service rooms are positioned to the west while the rooms and veranda face east and mountain views. Isolated light facades in the west and east complete the concrete structure's roofs. The offset wooden gangways provide additional solar protection on the western façades. An alternation of single-slope roofs in sheet metal and green roof terrace energize the project and are also used to harvest the rainwater that is then infiltrated into the ground at the level of the landscaped valleys and the retention basin to the north near the entrances on site .

See more details about this project

Photo credit

Nicolas Peyrebonne


Construction Manager


    Other consultancy agency

    Intégrale ingénierie

    Thermal consultancy agency

    Intégrale Ingénierie

    Maxime Boulinguez

Contracting method

Separate batches

Type of market

Global performance contract

Energy consumption

  • 92,00 kWhep/
  • 145,00 kWhep/
  • RTAA DOM 2012

Real final energy consumption

    28,00 kWhef/

More information

Final consumption is given as an indication according to Perene 2009, no regulatory calculation is made at the meeting. The only source of energy is electricity, primary energy depends on the energy ratio of Reunion for its electricity production (3.3 against 2.58 in metropolitan France).


    • No heating system
    • Solar Thermal
    • No cooling system
    • Natural ventilation
    • Nocturnal ventilation
    • Free-cooling
    • Solar Thermal

Urban environment

  • 3 660,00 m2
  • 60,00 %
  • 420,00
  • The project is part of a ZAC with quite specific urban orientations. We chose to respect these guidelines in order to participate in the coherence of the whole and to create a visual and pedestrian porosity in the North / South direction. Involvement is a main orientation of building facades in the East / West direction, which is apparently unfavorable from a solar point of view. The addition of vegetated passageways on the West facades allowed to put in place a solar filter on the most exposed facade. The direction of the winds, on the other hand, was compatible with the urban orientation, the project being able to capture thermal breezes perpendicular to the coast.


    Structural work / Passive system

    Implementation of a system of wood corridors to serve all the housing, porosity of facades superior to the regulation in order to optimize the natural ventilation of all the houses without any air conditioning system and landscape project in order to create an island of freshness on the plot while offering many vegetable gardens

    Very positive feedback from both the client and tenants seduced by this sober and efficient realization

Construction and exploitation costs

  • 6 959 000,00
  • 250 000,00
  • 390 000
  • 5 495 000
  • 3 161 621
  • The total cost includes the cost of the land for 745 000 € and the cost of construction for 4 750 000 €

Indoor Air quality

    Bioclimatic design in a tropical environment requires open design. This initial parameter ensures a constant natural renewal of the air, improving the quality of indoor air. The use of NF Environnement labeled paints complements this device.


    Bioclimatic design in a tropical environment requires open design. This initial parameter ensures a constant natural air renewal, improving the indoor air quality. The use of NF Environnement labeled paints complements this device.

    The project respects the RTAA DOM, in particular the acoustic aspect of the regulation. This makes it possible to manage an incompatibility often encountered between natural ventilation and acoustic comfort. The presence of an automobile traffic lane in the South involved E / O ventilation, favoring opaque façades, thus protected from noise on exposed façades.

Reasons for participating in the competition(s)

  • Acoustique et ventilation naturelle
  • Ventilation naturelle
  • Construction bois et logements sociaux
  • Paysage

Building candidate in the category

Energy & Hot Climates

Energy & Hot Climates

Users' Choice

Users' Choice

Green Solutions Awards 2019 - Buildings

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Author of the page
Nicolas Peyrebonne

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Green Solutions Awards 2019 - Buildings