How the DGT's position has evolved
Current position
The execution of works requires obtaining a result different from the materials used, distinguishing it from mere supply or the leasing of services. To apply the reduced rate of 10% in the construction or rehabilitation of dwellings, the suitability for residential use is determined by objective design characteristics without requiring licenses. In garden repairs, the 10% rate requires that the cost of materials does not exceed 40% of the taxable base.
The DGT's position remains constant in defining the execution of works as a contract for a result. The evolution is observed in the precision of the requirements for applying reduced rates and the delimitation of the taxpayer's investment. Criteria regarding the nature of materials and the suitability for use of buildings have been added.
Turning points
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Establishes the technical distinction between the execution of works and the leasing of services, defining the former as the obtaining of a result or a good different from the materials.
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Clarifies that the mere supply of materials, with or without transport, does not constitute an execution of works for the taxpayer's investment.
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Determines that the suitability for residential use is based on objective design and construction characteristics, dispensing with the certificate of habitability.
Analysis based on 117 of 128 rulings with a stated position. Updated 6 September 2026.