Yes. A registered certificate is required for new buildings and for existing buildings that are sold or let. Maximum validity is ten years, with one exception: where the rating is G the validity is shorter, so an old certificate on a poorly rated property may already have expired even though ten years have not passed.
Where this comes from: arts. 3 and 17 Real Decreto 390/2021, in force 3 June 2021, BOE consolidated text, read 2026-09-07; art. 13.1 RD 390/2021, BOE consolidated text, read 2026-09-07.