An administrative act is a legal act subject to administrative law, the litigation of which is the responsibility of the administrative judge. Mayors and presidents of local authorities may use real estate acquisitions in a development or road project, either in administrative form or by notarial deed.

The purpose of urban planning documents is to specify the rules affecting the allocation and occupation of land (mostly for buildings).

The building permit makes it possible to undertake any new construction (such as a house) but extension works for an area greater than 20 sqm or work for historical monuments.