(26)Contracts related to the transfer of immovable property or of rights in immovable property or to the creation or acquisition of such immovable property or rights, contracts for the construction of new buildings or the substantial conversion of existing buildings as well as contracts for the rental of accommodation for residential purposes are already subject to a number of specific requirements in national legislation. Those contracts include for instance sales of immovable property still to be developed and hire-purchase. The provisions of this Directive are not appropriate to those contracts, which should be therefore excluded from its scope. A substantial conversion is a conversion comparable to the construction of a new building, for example where only the façade of an old building is retained. Service contracts in particular those related to the construction of annexes to buildings (for example a garage or a veranda) and those related to repair and renovation of buildings other than substantial conversion, should be included in the scope of this Directive, as well as contracts related to the services of a real estate agent and those related to the rental of accommodation for non-residential purposes.