A declaration of new construction reflects a physical modification to a registered property, such as the construction of a building. The declaration can be for a completed property or a property under construction; in the latter case, the corresponding certificate of completion of works will be necessary. The declaration of new construction is always granted by the registered owner.

New construction works or extensions to previous ones:

Property titles of the plot owners.
D.N.I. of the interested parties.
If a company is involved, current powers of attorney or appointment of administrators.
Cadastral reference (last IBI receipt).
Municipal building permit.
Technical project, indicating the budget for material execution.
Once granted, a certificate from the architect who authored the project must be provided, attesting that the description contained in the deed matches the project for which the building permit was obtained.

Existing works from before, for which there is no technical project:

Property titles of the plot owners.
D.N.I. of the interested parties.
If a company is involved, current powers of attorney or appointment of administrators.
Cadastral reference (last IBI receipt).
Description of the building's characteristics.
Municipal certificate of the building's existence and its description, attesting that the new construction is not subject to any municipal sanctioning proceedings for urban indiscipline.
Value assigned to the declared new construction.

Works