How the DGT's position has evolved
Current position
Owners of dwellings in buildings for residential use may deduct 60% of the amounts paid for energy rehabilitation works that reduce non-renewable primary energy consumption by at least 30% or improve the rating to class 'A' or 'B'. The deduction is applied to the proportional part of the investment according to the participation coefficient in the horizontal property. It is essential to certify the improvement through an energy efficiency certificate.
The DGT's position remains constant regarding the substantive requirements for the energy rehabilitation deduction. The evolution focuses on the precision of formal requirements, such as the temporal validity of previous certificates and the management of the deduction practice periods according to the issuance of the certificate.
Turning points
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Introduces a temporality requirement for previous certificates, establishing that they are only valid if two years have not elapsed between their issuance and the start of the works.
Analysis based on 57 of 62 rulings with a stated position. Updated 16 September 2026.