Building my new home from scratch (DIY) (Greece)

Do you just mean a zwave wall switch with dimming?

There are certainly UK versions of those, but you will have to have a neutral wire at the switchbox. In the UK this would be a blue wire, I don’t know if Greece has a fixed wire colour scheme or not. ( The US does not.)

Develo, Popp, and all make zwave switch options for the UK. There are some additional brands as well.

See the FAQ for UK Lighting for more detailed discussion of the various options: