Electricity project (z-wave automation)

Community Playground Getting Started & Initial Setup
1

I am currently building a new house and making a project for electricity. I want to use z-wave for automation!
Of course i want to automate everything withch is possible, lights, power supply, security, window blinds, multimedia…
So i have qustion below :
How is make batter to compose the electricity network:

  1. Each floor to have own board with all z-wave devices such as dimmers and relays. The house is quite big (4 floors, more then 100 sq.m each. With sure i should to put some main powered devices between floor to repeat the signal. All modules should be wired directly to the floor board.
    or
  2. To place each modules under the switches and power socets in the rooms. In that case i should put neutral everywhere if i want to use relays.

Could you please be so kind and recommend me witch is a better option.

2

It would help if we knew what country you are in. Different countries have different rules, and different devices available.

3

Country is EU. We do not have special regulation about architecture of the network in the houses. I can put everything in one/two places or in the house under the switches and sockets.