Energy renovation of co-ownerships: a collective dynamic that is not weakening

While new rules for the MaPrimeRénov' scheme for single-family homes came into effect on October 1, 2025, the MaPrimeRénov' Copropriété scheme remains fully active. This is an essential clarification at a time when collective energy renovation projects are experiencing real enthusiasm.

In 4 years, 110.000 co-ownership homes have been renovated[1].

In December 2024, 30.000 condominium renovation applications were submitted, compared to only 6.000 a year earlier[2].

These figures illustrate a strong trend: co-owners are taking advantage of state aid to improve the energy performance of their homes.

Co-ownerships represent a formidable lever for collective action to improve the energy performance of buildings: in France, around 14% of co-ownership housing, or nearly 540.000 homes, are currently classified as F or G in the DPE, and therefore considered to be real energy sieves[2].

The MaPrimeRénov' Copropriété scheme, launched in 2020, aims to support co-owners in the renovation of common areas and amenities of collective interest in order to improve the overall energy performance of the entire building. Beyond helping to protect the planet by reducing CO2 emissions, energy renovations provide thermal comfort to residents in both winter and summer and allow them to better control their energy bills. Energy-renovated buildings also include a "green value," which can be valued at the time of resale.

In this context, the Cler network highlights two exemplary projects, in Bordeaux and Bron, led by committed co-owners and supported by local organizations. These concrete, human, and inspiring projects prove that energy renovation in co-ownership is a possible collective adventure.

Bordeaux (33) - Enhanced thermal comfort and reduced bills, the Eden Roc residence has taken the plunge with an ambitious renovation

Built in 1964, the Eden Roc residence, a co-ownership complex of 30 apartments spread over four levels with a living area of ​​2.500 m², had never before undertaken energy renovation work. Faced with ground-floor apartments that were particularly difficult to heat in winter, Marie-Christine MAZ, president of the board of directors, initiated a comprehensive renovation project, supported by the ALEC of the Bordeaux metropolitan area.

Comprehensive technical diagnosis, methodological support, votes at the general meeting... The co-owners are committed to a comprehensive process, until the start of the work in 2022. The work carried out has enabled a thorough renovation of the co-ownership: external thermal insulation, insulation of the cellar ceilings, replacement of gas boilers, installation of mechanical ventilation, repair of the joinery and railings, modernization of the intercom system and renovation of the common areas.

A demanding project that required education, consultation, and quality technical support. But at the end of the process, the building was transformed, residents experienced greater comfort, and bills were reduced. This is proof, at the local level, of the tangible impact of energy renovation assistance in co-ownership.

The key:

• 60% energy gain, with a drop from 173 to 70 kWhep/m²/year (change in energy label from D to B after the work)
• An average remaining charge of €14.000 per dwelling, out of a total budget of €921.000

Please note that 54% of the project was financed thanks to MaPrimeRénov' Copropriété, Bordeaux Métropole and the Nouvelle-Aquitaine Region.

For Ms. Marie-Christine MAZ, President of the Joint Council, Résidence Eden Roc: "The meeting with ALEC Bordeaux and Gironde allowed us to understand that this ambitious project was feasible. Their support was crucial at every stage, from the diagnosis to the financial aid. We had to reassure and convince, but with perseverance and the right partners, we were able to bring the entire co-ownership into a successful energy renovation. Today, we are already seeing improved thermal comfort and a real increase in the value of our building."

Bron (69) - A move to action supported by the Alec of the Lyon Metropolis for the Lacouture co-ownership

Built in 1968, the Lacouture condominium, located in Bron, in the Lyon metropolitan area, is currently undergoing renovations to achieve BBC (low-energy building) standards. Supported by the Lyon metropolitan area's ALEC (Energy Savings Agency) since 2018, the condominium opted for a comprehensive renovation following an energy audit that revealed significant heat loss, a CMV system nearing the end of its life, and facades requiring aesthetic renovation.

The work undertaken is extensive and covers all key areas: insulation of the facades and lower floors, renovation of the terraces, replacement of the woodwork in the common areas, installation of high-performance shutters, harmonization of the heating systems with high/low regulation, and complete replacement of the ventilation system with a humidity-controlled device.

Driven by a dynamic of eco-citizenship and the desire to enhance its heritage, the co-ownership is part of a strong local movement: many neighboring co-ownerships and single-family homes have already undertaken similar renovations. Supported by a range of aid (MaPrimeRénov', eco-renov, eco-PTZ, CEE, etc.), the co-ownership benefits from enhanced support at each stage.

For André Gauthier, member of the union council: "ALEC Lyon's support allowed us to better understand the technical and financial challenges of such a project. It was this support that gave us the keys to taking action."

1. MaPrimeRénov' Review 2024 / ANAH

2. Housing stock by energy performance class as of January 1, 2024

3. https://www.anah.gouv.fr/sites/default/files/2024-02/202402-guide-renovation-energetique-copropriete.pdf