How the DGT's position has evolved
Current position
The 60% deduction for energy rehabilitation in buildings of predominantly residential use requires that the works improve the efficiency of the building as a whole. This must be proven through an energy efficiency certificate showing a reduction in non-renewable primary energy consumption of at least 30% or the attainment of an 'A' or 'B' rating. Works carried out individually that only affect the private dwelling do not allow access to this specific deduction.
The DGT's position remains constant in requiring that the energy improvement affects the building as a whole and not just the individual unit. The rulings confirm that individual actions do not qualify for the deduction under section 3 if they do not impact the global efficiency of the property. No changes are observed in the technical accreditation requirements throughout the sequence.
Turning points
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Clarifies that individual works that only affect the private dwelling cannot be included in the base for the deduction under section 3 as they do not improve the efficiency of the entire building.
Analysis based on 13 of 15 rulings with a stated position. Updated 26 September 2026.