Conn. Gen. Stat. § 4b-77

(b) On and after January 1, 2023, the Commissioner of Administrative Services shall require each new construction of a state facility, the total project costs of which exceed one hundred thousand dollars, to be installed with level two electric vehicle charging stations in at least twenty per cent of the designated parking spaces for cars or light duty trucks at such facility.

(c) On and after January 1, 2023, a municipality shall require each new construction of a commercial building or multiunit residential building with thirty or more designated parking spaces for cars or light duty trucks to include electric vehicle charging infrastructure that is capable of supporting level two electric vehicle charging stations or direct current fast charging stations in at least ten per cent of such parking spaces. A municipality may, through its legislative body, require any such commercial building or multiunit residential building to include such electric vehicle charging infrastructure in more than ten per cent of such parking spaces.