The European Union's post-pandemic recovery fund allocated €43 billion to improve the energy efficiency of private homes across the bloc, but a new audit from the European Court of Auditors (ECA) published on Tuesday reveals that the program has fallen short of its climate and fiscal goals. The report criticizes the design of the Recovery and Resilience Facility (RRF), arguing that it encouraged member states to prioritize politically convenient projects over those with the greatest potential to cut energy consumption.
“EU renovation funding for private homes should go to those projects with the greatest potential for cutting energy use. However, we saw all too often that RRF funds went where they were easiest to spend, not where they would make the biggest difference,” said Nikolaos Milionis, the ECA member responsible for the audit.
Quick Fixes Over Deep Retrofits
The auditors found that the RRF's tight 2026 deadline inadvertently pushed governments toward simpler, faster renovations such as installing solar panels, replacing windows, or upgrading boilers. More ambitious work—like comprehensive insulation of roofs and walls, or deep retrofits capable of reducing energy consumption by more than 60 percent—proved slower, more expensive, and often fell behind schedule.
This approach, the ECA warns, has increased renovation activity but failed to deliver the structural improvements Europe needs to decarbonize its building stock, which accounts for 25 percent of the EU's energy consumption. The report notes that projects were often approved based solely on eligibility criteria, without comparing them to prioritize those with the highest potential energy savings.
The Commission's apparent lack of focus on structural improvements contrasts with its own electrification ambitions. Environmental groups have argued that the EU is too concentrated on producing more clean electricity and not enough on reducing the amount of energy that needs to be consumed in the first place.
Flawed Measurement of Success
Perhaps the most significant finding concerns how energy savings are measured. The Commission encourages member states to estimate savings using Energy Performance Certificates, but the ECA concluded that these certificates were never designed to measure actual energy consumption. Instead, they rely on standard assumptions about how people use buildings, creating a substantial “performance gap” between theoretical and real-world energy use.
In the four countries examined—Belgium, Italy, Cyprus, and Lithuania—the auditors found that estimated consumption frequently differed dramatically from actual performance. In some cases, theoretical consumption exceeded actual use by several hundred percent, meaning reported energy savings may substantially overstate what households actually achieve. This could distort spending decisions and public accountability.
Cost-Effectiveness Ignored
The audit also highlights a striking omission: there has been no systematic monitoring of cost-effectiveness. Although the RRF is officially described as a performance-based instrument, neither the Commission nor participating governments tracked how much energy was saved for every euro spent.
“The EU spent billions on home renovations without tracking how much energy was saved for every euro invested,” reads the report.
The auditors performed their own calculations and found major differences between countries and schemes. Italy's widely publicized Superbonus emerged as the clearest example of poor value for money: it reimbursed homeowners for up to 110 percent of renovation costs, fueling enormous demand but also inflating costs to the point where taxpayers face an estimated €123 billion bill. “We consider that this level of support is not in line with the principles of sound financial management and that it negatively affects the cost-effectiveness of the measure,” the ECA report states.
The Commission is already considering future financing for building renovations in the next multiannual EU budget, making the ECA audit more than a retrospective critique. EU auditors are effectively warning that future climate spending risks repeating the same mistakes unless funding becomes more targeted, evidence-based, and performance-driven.
As Europe pushes to meet its climate targets, the lessons from this audit are clear: without rigorous measurement and prioritization, billions of euros may be spent on renovations that do little to reduce energy consumption or improve the continent's aging housing stock. For more on the EU's broader tech and energy ambitions, see our coverage of EU high-tech sales hitting €414 billion in 2024 and the easing of energy costs across the eurozone.
