Institutional portal - Municipality of Milan

The construction contribution is made up as follows:

• primary urbanization charges;
• secondary urbanization charges;
• waste disposal;
• contribution commensurate with the construction cost.

The amounts to be used for urbanization costs can be found on the website of the Municipality of Milan at the following path:
https://www.comune.milano.it/aree-tematiche/urbanistica-ed-edilizia/contributo-di-costruzione

It should be noted that these amounts are for "new construction", in all cases of building renovation, even with demolition and reconstruction, it will be possible to reduce them by 60%.
As regards the contribution commensurate with the construction cost, it must be calculated in the following ways distinct by intended use:

INDUSTRY:
in Industry there is no calculation of the Construction Cost, instead there is Waste Disposal, and its amount per m2 of SL can be found on the same document that collects the urbanization charges, published on the municipal website.

RESIDENCE:
the construction cost is determined using the Ministerial Table of the Ministerial Decree. 801 of 1977, determining the class of the entire building according to the project status, and then applying the identified class to the project building intervention only.
If it is not possible to determine the class of the entire building, it will be possible to request the application of the maximum class (Class XI^).
The classes indicated in the aforementioned Ministerial Decree there are eleven, and each applies an increase to the base price of the Construction Cost.
We start from class I^ (no increase) and reach the 50% increase for class XI^.
The class of the building determines which of the 3 rates will be applied to determine the contribution commensurate with the construction cost (7%, 10%, 20%).

TERTIARY:
including "entertainment venues, gyms, hotels, commerce", the construction cost is determined with C.M.E. using the prices of the Milan chamber of commerce, and 10% of the amount of the planned works is applied.
In the case of building renovation interventions, even with demolitions and reconstructions, the construction cost can never be higher than 50% of the value of the new construction, pursuant to art. 48.6 of the Regional Law 12/2005 modified by art. 4.1.h of the Regional Law 18/19. 

FAQ SUE n. 35 - Published on 6 March 2020