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Challenge / Goal

Milan will address deep energy retrofit of the residential building stock, both public and private, saving the 60% of energy consumption through tailoured technology packages. This will include:

  • Integration of low-carbon energy sources
  • Physical modernisation
  • Digital controls
  • Comfort monitoring

New approaches of co-design processes and citizen engagement paths will be developed through the digital availability of consumption and environmental data, collected by innovative monitoring systems. Interventions aim to save up to 60-70% of energy consumption and improve comfort inside dwellings.


Public Building: refurbishment of 5,000 square meters of public residential building with PV panels, heat pumps and comfort monitoring system (max estimated energy consumption savings of 60%).              
Private Building: retrofit of more than 24,000 square meters of multi-property residential buildings integrated with sensors for monitoring and managing energy consumption (max estimated energy consumption saving of 70%).

The activities involved the following phases:

  • 55 condominium candidate to call for interest
  • 20 condominiums attended the co-design process
  • June 2017 - end of co-design process
  • September 2018 - 5 condominiums approved retrofitting (24,298 square meters)
  • December 2018 - 4 condominiums retrofitted  (15,500 square meters), 1 ongoing (finished by June 2019)

The co-design processes consisted of different steps and meetings:

  1. Introduction – all condos participate together and discuss the expectations of improvement after retrofitting interventions
  2. Technical Analysis - condominiums work with technicians who make diagnosis of building and explain the possible results of retrofitting
  3. Sharing Scenarios - technicians present different scenarios (costs and cash flows)
  4. Extra Meeting - the chosen scenario is presented to the single condominium and deepened in specific meetings


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Time period

Planning time: 6 months to 1 year

Implementation time: 2 to 5 years

    Main benefits

  • Decreasing energy consumption in buildings

  • Reducing energy bills

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