How the DGT's position has evolved
Current position
To apply the 10% rate in rehabilitation, the works must meet a qualitative requirement (more than 50% of the cost in structural elements, facades, roofs, or analogous/connected works) and a quantitative one (cost exceeding 25% of the value of the building excluding the land). Suitability for residential use is determined by objective design and construction characteristics, without the certificate of habitability being mandatory. The nature of the works is a matter of fact that must be proven by means of evidence.
The DGT's position remains constant regarding the definition of rehabilitation requirements. The double-test structure (qualitative and quantitative) has been maintained since 2014. The most recent rulings have specified the need to prove the nature of the works through means of evidence and have clarified that suitability for residential use depends on objective construction elements.
Turning points
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Explicitly includes 'analogous/connected' works within the qualitative requirement of 50% of the cost.
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Clarifies that suitability for residential use is determined by objective design and construction characteristics, dispensing with the certificate of habitability.
Analysis based on 27 of 28 rulings with a stated position. Updated 24 September 2026.