The indicator captures the evolution of low environmental impact technologies installed in newly constructed buildings in Italy from 2010 to 2023. Between 2010 and 2021, Italian buildings increasingly adopted photovoltaic systems and heat pumps, encouraged by EU incentives and regulatory obligations. However, installations decreased in 2022–2023, revealing the sector’s reliance on incentives. Uptake is highest in medium-sized municipalities, slower in large cities (roof constraints), and more limited in very small municipalities (weaker infrastructure). The use of condensing boilers collapsed, though it rebounded when incentives and hybrid systems were reintroduced. Stabilising the transition requires stable incentives for photovoltaics, upgraded electricity networks for heat pumps, and the definitive phase-out of gas boilers.