Certificado energético

Mandatory official document for sale and rental that classifies the property's energy efficiency on a scale from A (most efficient) to G (least efficient), assessing energy consumption and CO₂ emissions. Required to register the sale and must appear in any listing. On the Costa Blanca, properties prior to 2007 typically rate E, F or G; new builds since 2020 must reach class A or B. Lower class means higher energy bills.