Hélène Boucher condominium in Sevran

  • Building Type : Collective housing < 50m
  • Construction Year : 1973
  • Delivery year : 2018
  • Address 1 - street : 10 ALLEE HELENE BOUCHER 93270 SEVRAN, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 1 700 m2
  • Construction/refurbishment cost : 480 811 €
  • Number of Dwelling : 23 Dwelling
  • Cost/m2 : 282.83 €/m2
  • Primary energy need :
    64 kWhep/m2.an
    (Calculation method : RT existant )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

Energy renovation of a small joint ownership of 23 lots in Sevran ( in Paris suburbs) as part of the "OPAH Quartier Rougemont". The works included the insulation of the roof terrace, the installation of a thermal insulation from the outside, the replacement of all the joinery, the installation of a humidity-sensitive ventilation, the insulation of the low floor and the setting up of the building's safety. The energy saving is 68%.

Sustainable development approach of the project owner

Rehabilitation and energy renovation of a 1970 condominium: 23 housing units under the OPAH of the Rougemont district with the operator OZONE.

Insulation from the outside, Insulation of the roof terrace, replacement of all windows, and upgrading common areas. ECIC thermic. EVAM syndic. Budget 480 € 811 ht.

This allowed to divide by almost 3 the energy consumption of the condominium from 178 to 64 kWeh/m²/year. It has reached certain levels of BBC renovation requirement (without being labeled) thanks to this performance.

Building users opinion

The occupants dropped the interior heating temperature by 3 ° C.


Construction Manager


    Thermal consultancy agency

    ECIC Ecic 2, av. du Régiment Normandie Niémen 91700 Sainte-Geneviève-des-Bois



    Assistance to the Contracting Authority

    OZONE 34 av. Raspail 94250 Gentilly

    Benoit MAAS


Contracting method

Separate batches

Type of market

Global performance contract

Energy consumption

  • 64,00 kWhep/m2.an
  • 178,00 kWhep/m2.an
  • RT existant

    22% heating
    30% ECS
    9% lighting
    2% auxiliary pumps
    5% auxiliary fans

  • 178,00 kWhep/m2.an

Real final energy consumption

    57,00 kWhef/m2.an

Envelope performance

  • 0,62 W.m-2.K-1


    • Urban network
    • Urban network
    • No cooling system
    • Humidity sensitive Air Handling Unit (Hygro B
    • No renewable energy systems

Urban environment

    Residential environment, Rougemont district in Sevran.




    Finishing work / Exterior joinery - Doors and Windows

    Replacement of the windows and guardrail doors with a carpentry with a fixed flame arrestor to respect the C + D

    Clear glazing and increased standards

Construction and exploitation costs

  • 6 403
  • 628 000
  • 521 900

GHG emissions

  • 10,00 KgCO2/m2/an
  • Existing RT

    GHG emissions were 30 KgCO2 / m2

Reasons for participating in the competition(s)

Rénovation énergétique d'une petite copropriété de 23 lots à Sevran dans le cadre de "l'OPAH  Quartier Rougemont". Les travaux comprenaient l'isolation de la toiture terrasse, la pose d'une isolation thermique par l'extérieur, le remplacement de toutes les menuiseries, la mise en place d'une ventilation hygroréglable, l’isolation du plancher bas et la mise en sécurité du bâtiment.Le gain énergétique est de 68%.

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

Users' Choice

Users' Choice

Green Solutions Awards 2019 - Buildings

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    Green Solutions Awards 2019 - Buildings

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