• Building Type : Collective housing < 50m
  • Construction Year : 1966
  • Delivery year : 2022
  • Address 1 - street : 27 rue Schnapper 78100 SAINT-GERMAIN-EN-LAYE , France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 2 052 m2
  • Construction/refurbishment cost : 497 013 €
  • Number of Dwelling : 32 Dwelling
  • Cost/m2 : 242.21 €/m2
  • Primary energy need
    156 kWhep/
    (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

This is a condominium that has benefited from the new energy renovation aid scheme "Ma Prime Rénov' Copropriété".

In 2020, the condominium voted to carry out a simple facelift with the insulation of only the two gables.

The appearance of "Ma Prime Rénov' Copropriété" was a trigger and prompted the condominium to expand its work program in order to benefit from public subsidies available to all co-owners.

In this context, in-depth awareness-raising work and several communication actions with the union council and the trustee were carried out at the co-ownership level.

A more ambitious and eligible additional work was redefined and voted on at the general meeting of 15/12/2021.

This program consists of carrying out a facelift with ITE (external thermal insulation) as well as the installation of controlled mechanical ventilation.

It makes it possible to achieve an energy gain after work of 36%.

The work began on 03/01/2022 and was completed in early summer 2022.

Photo credit



    Résidence de L'Etang

Construction Manager

    EMG Architectes


    Assistance to the Contracting Authority



    AMO Financial Engineering.



    Installation of a VMC



    Installation of a ventilation grille


    Nuance 3

    Refacing with external thermal insulation

Energy consumption

  • 156,00 kWhep/
  • 156,00 kWhep/
  • RT existant

  • 243,00 kWhep/


    • Condensing gas boiler
    • Individual electric boiler
    • No cooling system
    • Natural ventilation
    • No renewable energy systems

Urban environment

    The condominium is located at 27 rue Schnapper in the Debussy-Schnapper district in Saint-Germain-en-Laye.

Construction and exploitation costs

  • 24 000
  • 521 013
  • 150 320
  • Breakdown of costs by item:
    - Refacing with ITE: €331,754 excluding tax.
    - Installation of a VMC system: €67,760.6 excluding tax.
    - Installation of ventilation grilles: €5,152 excluding VAT.
    - Architect works phase: €36,419.99 excluding tax.
    - Architect study phase: €2,200 excluding tax.
    - Control office: €5,600 excluding VAT.
    - SPS coordinator: €4,046.67 excluding tax.
    - Other work + non-subsidizable fees: €46,279.67 excluding tax.

    Aid details:
    Co-ownership filed under the MaprimeRénov Copro aid scheme:
    - Anah Collective grants: €116,688.32
    - Individual Anah bonuses: €10,500
    - CD78 grants: €19,632
    - Aid from CA SGBS: €3,500

Reasons for participating in the competition(s)

After awareness-raising and information work, the condominium was able to build a coherent energy-saving work programme, adapted to its configuration and its financial capacity.

The condominium finally voted for its energy renovation at the end of 2021 despite the concern of some co-owners about the financing of the project.

The condominium completed its work at the beginning of summer 2022 and is therefore one of the first condominiums in the "Ma Prime Rénov' Copro" system to complete its rehabilitation.

The energy renovation has enabled the co-owners to benefit from "Ma Prime Rénov' Copro" public subsidies, to upgrade their assets and improve their thermal comfort while saving energy.

The Etang residence therefore bears witness to the success of a coherent and well-financed energy renovation project within the framework of "Ma Prime Rénov' Copropriétés".

Trophées des Copros des Yvelines
 Global renovation energy saving ITE VMC Ma Prime Rénov' Copro building renovation housing energy Yvelines Copro Trophies

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