We have consulted on a significant interim improvement to the energy efficiency standards for new homes as a first step towards the Part L 2025 standard.
Rydym wedi ymgynghori ynghylch gwelliannau dros dro sylweddol i’r safonau effeithlonrwydd ynni ar gyfer cartrefi newydd fel cam cyntaf tuag at safon Rhan L 2025.