The preliminary design studies include the summary preliminary design studies defined in article R. 2431-10 and the final preliminary design studies defined in article R. 2431-11.
The preliminary design studies also include the preparation of the files and consultations falling within the remit of the project manager and required to obtain the building permit and other administrative authorisations, as well as assistance to the project owner during their examination.
For new housing developments, the preliminary and final design studies may be carried out in a single design phase.