Construction costs for a 180 sqm single-family house

For us, it was €300 - in return, an element was kindly given to us as a gift (did not want the guest WC with a motor, but it was done anyway)

For us, it was also 300€ including electrical work. Since we do the electrical work ourselves, it was then 80 euros, I believe.

Depending on whether you want to network the roller shutters or control them intelligently, the electrical installation is more complex. However, if you secure all the roller shutters on one floor separately or only draw power for each roller shutter individually from the nearest socket, there will never be additional costs of 150-200 € for a few meters of cable. They simply charge a premium for "luxury."

For us, it was also €300 including electrical work. Since we do the electrical work ourselves, it was then €80, I think.

Exactly, and how much were the additional costs for the cable and the time effort?