ACE-Retrofitting: Accelerating Condominium Energy Retrofitting

Project Summary

Although local governments are tackling climate change, a majority of buildings in North-West Europe are still energy-inefficient and in need of deep renovation.

If action is not taken it will lock local governments into a high carbon-footprint future. By targeting condominiums (tenements and flatted buildings), the greatest number of private owners can benefit from more energy efficient homes while creating significant financial and carbon savings (50-70%).

Energy Cities, guided by a strategic energy transition vision and its capacity to ensure widespread success in its network, along with 6 local authorities from 5 different countries in NWE will introduce and promote a governance arrangement that overcomes the legal, human and financial barriers to the energy retrofitting of condominiums.

CoachCopro, a free, online collaborative tool developed by the Paris Climate Agency (Agence Parisienne du Climat), is central to this strategy and will be improved and adapted to be used in other parts of Europe.

In France, this web-based platform has already successfully assisted condominium owners (demand) and building professionals (supply) through an iterative process which cultivates trust relationships and generates direct and indirect jobs (potentially 19 net jobs created per €1M investment).


Want to talk about ACE-Retrofitting?

We provide you with a standard presentation (PDF) in 4 European languages:

You may also use our promotional card to spread the word about the project!

For all questions regarding communication, please contact floriane.cappelletti [ at ]



Webinar - Introduction to the Interreg North-West Europe Programme

06-09-2018 - 06-09-2018, Online

Join us for a webinar with Filippo Compagni, UK contact point on 06 September to learn more about the programme, hear about examples of successful projects and find out how you can get involved. It will be an interactive session with plenty of opportunities to ask questions. Read more

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Progress for ETC programmes in Brexit discussions

Posted on 13-08-2018

The guarantee from the UK Government to UK based organisations has been extended till the end of 2020. Read more

9 project proposals received in the targeted call on renewable energy

Posted on 31-07-2018

The targeted call on renewable energy received 9 applications. The Monitoring Committee will decide by October 2018 which ones will be approved. Read more

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This project is also supported by the French Energy Management Agency - ADEME.

Project Partners

Lead partner

Organisation Contact name Address Email Website
Energy Cities Ian Turner 2 Chemin de Palente
Name Contact Name Email Country
Ville de Liège Marc Schlitz Belgium
Agence Parisienne du Climat Emmanuel Poussard France
Universiteit Maastricht Annemarie Van Zeijl-Rozema Netherlands
Aberdeen City Council Kevin Christie United Kingdom
Stadt Frankfurt am Main Energiereferat Wiebke Fiebig Germany
Gemeente Maastricht Weike Medendorp Netherlands
Autonoom Gemeentebedrijf Energiebesparingsfonds Antwerpen Jan Meuleman Belgium
Changeworks Resources for Life Ltd. Tessa Clark United Kingdom


Understanding owners’ motivations to support renovation of condominiums: What research and experimentation tell us

Posted on

With 12,000 households living in condominiums in Maastricht and among them 7,000 with a G energy label, the energy retrofitting of these buildings is a major challenge for the municipality. The workshop and site visit organised on 16 November in Maastricht - as part of the Interreg North-West Europe ACE-Retrofitting project, aimed to better understand owners’ barriers to taking action in their buildings thanks to feedback from academic research and project experience. Read More

ACE Retrofitting in Frankfurt – We need to reduce the energy consumption of our buildings by 70% by 2050!

Posted on

The second project meeting of ACE-Retrofitting - Interreg North-West Europe, was hosted by the City of Frankfurt from 12 to14 June, including a half-day conference which gathered ACE partners and German stakeholders involved in the energy retrofitting of condominiums. A great opportunity to better understand the challenges that the cities face to retrofit their condominiums. Read More


Exploiter les données de CoachCopro pour la constitution d’un observatoire de la rénovation énergétique des copropriétés.

, Genève, Suisse

Grâce à une utilisation harmonisée de l’outil dans 5 agences de l’énergie de la métropole parisienne et à un partage de données avec les principaux opérateurs du logement privé, l’agence parisienne du climat a pu mettre en place un observatoire de la rénovation énergétique des copropriétés à l’échelle de la métropole du Grand Paris.
Read More

Workshop & site visit: Understanding and accompanying owners in the energy retrofitting of their condominium

, Maastricht, the Netherlands

You are facing the challenge of the energy retrofitting of privately-owned condominiums in your city? One big challenge is how to help owners take the step from not retrofitting to retrofitting. In order to know how condominiums can most-effectively be supported, the underlying barriers for not taking action need to be better understood. In this symposium we will explore the mechanisms that prevent action to be undertaken, as well as some approaches and benefits of retrofitting.
Read More

Deutsch (de)

Der ACE-Zähler kommuniziert die Ergebnisse der Partnerstädte in Hinblick auf die geschulten Eigentümer und Fachleute sowie die erzielten Sanierungen und CO2-Reduktionen.



Geschulte Eigentümer

Geschulte Fachleute

Beschlossene Sanierungspläne

Sanierungen in Umsetzung: WEG / Wohneinheiten

Abgeschlossene Sanierungen: WG /Wohneinheiten

Jährliche CO2-Reduktion (in Tonnen)
Antwerpen Belgien 52          
Frankfurt Deutschland 100   564      
Lüttich Belgien   454        
Maastricht Niederlande     01231      
Paris Frankreich            




Dutch (nl)

De ACE-meter presenteert de resultaten die door de partnersteden zijn bereikt op het gebied van gecoachte eigenaren en professionals, gerealiseerde verduurzamingsmaatregelen en CO2-reductie



Gecoachte mede-eigenaren

Gecoachte professionals

Verduurzamingsplannen vastgesteld door ALV

Verduurzamingsmaatregelen in voorbereiding/uitvoering: appartementen/flats

Verduurzamingsmaatregelen afgerond: appartementen/flats

Jaarlijkse CO2 reductie (Ton)
Antwerpen België 52          
Frankfurt Duitsland 100   564      
Luik België   454        
Maastricht Nederland     01231      
Parijs Frankrijk            


English (en)

The ACE meter communicates the results reached by the partner cities in terms of owners and professionals coached, retrofitting achieved and Carbon reduced.





Co-owners coached

Professionals coached

Retrofitting plans voted

Retrofitting in progress: condominiums  / flats

Retrofitting finished: condominiums / flats

Annual decrease of CO2 emissions in tonnes
Antwerp Belgium  52          
Frankfurt Germany  100   564      
Liège Belgium    454        
Maastricht The Netherlands      01231      
Paris France            









Français (fr)

Le “ACE meter” communique les résultats atteints par les partenaires en termes de nombre de propriétaires et de professionnels coachés, de rénovations réalisées et de réduction des émissions de gaz à effet de serre.



Co-propriétaires coachés

Professionnels coachés

Plans de renovation approuvés

Rénovations en cours: copropriétés / appartements

Rénovations finalisées: copropriétés / appartements

Diminution annuelle des émissions de CO2 (en tonnes)
Anvers Belgique 52          
Francfort Allemagne 100   564      
Liège Belgique   454        
Maastricht Pays-Bas     01231      
Paris France            




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