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Yes, where the project involves the recovery of a surface which in its current state is without permanence of people.
As established by the art. 2 paragraph 2 of the L.R. 7/2017, the recovery of the basement floors is permitted, if obtained through building works, upon payment of the construction contribution required for the specific building qualification declared in the project in question.
Certainly the works pursuant to art. 2 paragraph 1 cannot be classified as new construction and therefore the economic regime provided for the latter category is excluded, subjecting them to the provisions for building renovation, as provided for by service provision n°3/2018.
In the event that, however, the recovery of surfaces already constituting the S.L. is envisaged. Payment of the contribution is expected only in the case governed by the art. 52.3 of the Regional Law 12/2005.
Furthermore, if the intervention involves an increase in the existing urban planning load and the S.L. of the project is greater than m100. 8, it is also subject to the procurement (or alternatively monetization) of areas for public services and equipment and of public or general interest, in accordance with the provisions of the Territorial Government Plan (PGT). In the case of qualification of the intervention as a building renovation, it is also necessary to verify the provision of private parking pursuant to art. XNUMX of the PDR of the PGT. 

FAQ SUE n. 31 - Published on 6 March 2020