There is not just one Italy from an energy point of view, there are many, with profound differences in the quality of the building stock and the levels of efficiency of the buildings: this is what emerges from a recent Resolglass analysis on a SIAPE/ENEA basis and proprietary calculations on a provincial scale, which for the first time reconstructs – according to a coherent probabilistic model – the distribution of buildings by energy classes for each Italian province and metropolitan city.
The national data is in fact now known: 30% of properties are still in class G. But the territorial reading shows a much more fragmented country: the share varies between 18.43% and 37.84% depending on the areas.
Resolglass processing provides a complete dataset with the distribution of energy classes for all Italian provinces, all metropolitan cities, all regions. It is a tool that allows you to read the real estate market not only from an environmental perspective, but also from an economic and strategic perspective. Let’s see some data extracted from the analysis.
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North, Center, South: three energy speeds
The map highlights a clear geographical divide:
- Northern Italy: class G share between 18% and 26%; greater diffusion of classes A and B.
- Central Italy: class G between 27% and 32%; intermediate and non-homogeneous situation.
- South and Islands: class G between approximately 31% and 37.8%; greater concentration of energy-intensive buildings.
“National data is no longer enough. It is the territory that determines the real energy intensity of the building stock” observes Enrico Scozzari, creator of Resolglass and CEO of the Resolfin Group.
Furthermore, the issue is not only climate-related, but patrimonial. In fact, a high presence of class G properties implies higher energy costs, lower market value and a higher risk of progressive devaluation. On the contrary, the spread of classes A and B represents, in addition to lower consumption, also greater real estate competitiveness.
Examples of efficiency: Alpine arc and large poles
Among the most advanced territories emerge:
- Bolzano and Trento, with class G below 20% and class A above 21%;
- Milan and central Lombardy, with class G around 24% and class A over 17%;
- Emilia-Romagna (Bologna, Modena), with class G under 26% and class A between 14% and 16%.
These are areas certainly characterized by greater real estate investment, more structured local energy policies and a more dynamic building market.
Examples of critical areas: South and part of the Centre
At the other extreme, significantly higher levels emerge:
- Naples and the metropolitan area, with 36.1% in class G;
- Calabria, with 35.8% in class G;
- Sicily, with approximately 31.4% in class G;
- Lazio and Abruzzo, with values above 30%, higher than the national average.
Here the building stock is in fact older, less redeveloped and therefore also characterized by greater energy dispersion.
Metropolitan cities: the real battlefield
Large urban areas represent the key point of the transition:
- Rome, with 29.7% in class G and a strong internal lack of homogeneity;
- Milan, with 24.1% in class G;
- Naples, with 36.1% in class G.
“The climate transition is played out in cities. This is where energy demand and the potential for reducing emissions are concentrated.” underlines Enrico Scozzari.
The role of the envelope: where the game is played
According to Resolglass analyses, the main lever remains the building envelope:
- high-performance facades;
- advanced glass systems;
- reduction of dispersions.
Intervening on these elements can generate up to 14% reduction in consumption in the short term and up to 37% in the long term.
The summary: Italy divided, but with potential
“Italy is today a country with multiple energy speeds. But precisely this distance represents the greatest opportunity: intervening on existing assets means reducing emissions and generating economic value” concludes Enrico Scozzari.
In this scenario, in fact, the challenge is not only to reduce the territorial gap, but to translate it into an operational lever: directing interventions on the envelope, targeted redevelopment and planning tools in the most inefficient areas can accelerate the energy transition and generate concrete value for the building system.
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