How the DGT's position has evolved
Current position
Owners of single-family homes may deduct 60% of the amounts paid for energy rehabilitation works up to a maximum of 5,000 euros per year. It is required to certify, through an energy efficiency certificate, a reduction in non-renewable primary energy consumption of at least 30% or an improvement in the rating to class 'A' or 'B'. In the case of co-ownership, each owner applies the deduction according to their percentage of ownership, even if the invoice is issued in the name of a single co-owner.
The DGT's position remains constant regarding the technical energy efficiency requirements and the deduction limits. The evolution focuses on precision regarding the application of the deduction in cases of co-ownership and flexibility in the means of proof to certify payments.
Turning points
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Establishes that the maximum annual base limit of 5,000 euros applies individually to each co-owner according to their percentage of ownership.
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Specifies that the deduction is applicable even if the invoice for the works is issued solely in the name of one of the co-owners.
Analysis based on 47 of 52 rulings with a stated position. Updated 18 September 2026.