Last modified by the author on 25/09/2018 - 12:06


  • Building Type : Terraced Individual housing
  • Construction Year : 2018
  • Delivery year : 2018
  • Address 1 - street : rue Védrines 59510 HEM, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 850 m2
  • Construction/refurbishment cost : 1 200 000 €
  • Number of Dwelling : 10 Dwelling
  • Cost/m2 : 1411.76 €/m2

Proposed by :

  • Primary energy need
    77 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

The 10 houses of Hem are the first homes rehabilitated in France zero energy any form of consumption guaranteed for 25 years. The performance in rehabilitation is superior to the RT2012 and the site by house lasts only 3 weeks.

Energiesprong is an initiative initiated in the Netherlands in 2013. Vilogia tested in France the first prototypes of this approach on 10 houses built in 1950 in Hem near Lille. Vilogia aims to rehabilitate 500 homes over 5 years using the same method. The Energiesprong method is as follows: using the current technological tools (digital and industrial method) to rehabilitate a dwelling in 3 weeks at Energie 0 and guarantee this Energy 0 objective for 25 years. Thanks to this guarantee, the tenant is protected from fluctuations in energy costs and the lessor invested in the real performance of his building.

The first prototypes have made it possible to test the implementation of technical solutions (external insulation, heat pump, photovoltaic panels, factory production of the various parts) and to obtain a house with energy 0 (performance superior to the current RT2012) 25-year guarantee via a Global Performance Market (Design Realization Operation Maintenance). The next step is to offer the tenant a couple rent + guaranteed charge integrating both the energy bill, equipment maintenance and rent.

The production of renewable energy by photovoltaic panels located on the roof is 6,000 kWh guaranteed per year. The consumption of housing for cooking, hot water, heating, ventilation is 3000 kWh guaranteed per year. The tenant therefore has an annual "energy package" of 3000 kWh / year to cover his domestic needs (TV, ironing, internet, lighting, ...). The dwellings are delivered in May 2018. For the 10 housing units the construction lasted 3 months. From the delivery, a monthly point is organized to evaluate the energy production, the energy consumption and the level of support necessary for the tenants. An annual point makes it possible to evaluate the achievement of the objective Energy 0 on average over the year.


Sustainable development approach of the project owner

Vilogia is part of the three pillars of sustainable development:

At the environmental level, Vilogia is the social landlord who develops the most passivhaus certified projects in France (600 homes by 2020). Vilogia is committed to renovating by the year 2022 500 standard Energiesprong homes.

At the economic level, Vilogia has developed internal tools to optimize construction costs and integrates the overall cost into its financial matrices. Vilogia also studies the impact of the overall cost in its investments.

At the social level, Vilogia launched 10 social innovation projects throughout France (participative housing, shared gardens, circular economy, urban agriculture, ...)

Architectural description

The residential site of Hem consists of sets of houses in R + 1, structured by small islands of 2 to 4 houses. These islands are largely surrounded by gardens at the front and at the back, and are composed of brick facades and four-sided tile blankets. The project retains this spirit by backing a new facade with a brick cladding, new white PVC joinery, while bringing a dose of modernity to the roofs, breaking the two sides in gable. These roofs are completely covered with photovoltaic panels. The interior of the accommodation is improved by small touches of use, thanks to the wood hugging in the rooms which are occasionally expanded to become an office.

See more details about this project



Construction Manager


Contracting method

Other methods


Energy consumption

  • 77,00 kWhep/m2.an
  • 151,00 kWhep/m2.an
  • RT existant

    Heating: 1,550 kwh / year ECS: 1,100 kwh / year Ventilation: 550 kwh / year Household appliances: 1,200 kwh / year Other uses: 1,600 kwh / year

  • 315,00 kWhep/m2.an

Real final energy consumption

    70,00 kWhef/m2.an

    2 018

Envelope performance

  • 0,44 W.m-2.K-1
  • Exterior insulation with wood frame panels R = 6.6
    Triple glazed joinery Uw = 0.9
    Insulation of the cellar underside R = 4
    Roof insulation R = 8.7


  • 0,60

More information

The photovoltaic production of 6000 kWh / year / housing covers all housing needs.


    • Heat pump
    • Heat pump
    • No cooling system
    • Double flow heat exchanger
    • Solar photovoltaic
  • 100,00 %
  • We use a thermal tower that provides the 3 uses of ventilation, heating and DHW production. All this via an AIR / AIR exchange. Additional local productions are also present in the living room and bathroom via electric convectors or dry towels.

    The installed panels are monocrystalline cells, allowing annual production on the 53 kwc project, with a module efficiency of 19.5%

Smart Building

    All consumption items (heating, ventilation, DHW, household appliances, set temperature, ...) are monitored in the dwellings, in order to communicate to the occupants their consumption compared to a normal use of their home.

Urban environment

  • 2 513,00 m2
  • 500,00 %
  • The project is located in a residential area of ​​the city of HEM, in a housing complex consisting of a hundred houses. These houses in R + 1 are assembled to compose sets of 2 or 4 houses, all in a wooded setting consisting of many gardens at the front and back of houses.






    HVAC, électricité / heating, hot water

    This equipment allows to have in a single machine all the uses of housing: Heating, Ventilation and production of Hot Water Sanitary. Easily accessible directly from the outside, it ensures easy maintenance by the operator.

    NeON2 Photovoltaic Panels




    Management / Others

    Photovoltaic panels.
    The installed panels are monocrystalline cells, allowing annual production on the 53 kwc project, with a module efficiency of 19.5%

Construction and exploitation costs

  • 1 200 000,00
  • 112 000,00
  • 159 419
  • 1 200 000
  • 56 000

Energy bill

  • 680,00

GHG emissions

  • 4,00 KgCO2/m2/an
  • 50,00 année(s)
  • DPE calculation method

Reasons for participating in the competition(s)

Une approche globale de la rénovation qui traite à la fois : la baisse de consommation, la production d'énergie renouvelable, la garantie de performance et l'accompagnement des locataires.

​Une réhabilitation de 10 maisons des années 50 réalisée en 3 semaines par maison.

Des maisons une fois rénovées à énergie 0 : la production d'énergie photovoltaïque est égale à la consommation totale du logement

Une garantie de la performance énergie 0 sur 25 ans

Un accompagnement des locataires la première année pour diminuer leur consommation énergétique

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

Users' Choice

Users' Choice

Sustainable Renovation Grand Prize

Sustainable Renovation Grand Prize

Green Solutions Awards 2018 - Buildings

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Green Solutions Awards 2018 - Buildings