How the DGT's position has evolved
Current position
Co-owners of a dwelling may apply the tax deduction for energy rehabilitation works in the proportional part corresponding to their percentage of ownership. To do so, they must prove that they have paid the amounts using any means of proof valid under law. The deduction is applied to the amounts effectively paid by each taxpayer.
The DGT's position remains constant regarding the application of energy rehabilitation deductions under a co-ownership regime. Recent rulings confirm that each owner applies the deduction according to their percentage of ownership and the amount effectively paid. No changes are observed in the doctrine applied to this scenario.
Analysis based on 51 of 52 rulings with a stated position. Updated 18 September 2026.