It is public works, for the purposes of the law, the result of a set of engineering works civil service intended to fulfil an economic or technical function, which aims at a good property, whether it is new-storey works or transformation, restoration reform. In the latter cases, it is public works if the set of works has a total or partial intervention that produces an essential variation. Are excluded from the concept of public works the set of works or actions that it has as a result of a construction or building work and urbanization works. These the latest works are governed by the provisions of urban planning legislation. Law 3/2007 of 4 July, of the public work.