Cost of electrical installation in a single-family house

15,000 is very little. At most, you get builder standard and in very rare cases, that will be enough, meaning 2 sockets in the living room and no LAN anywhere.

What should I answer you now? My offer for the electrical single trade in the builder standard you have in mind is €9,030 gross (offer is available). The updates will then be paid in cash, so I am quite sure I won't exceed €15k. Pulling a single socket with cable is €30, double socket €45, triple socket €60. TV socket + laying €50. SAT installation from the attic to the basement €160. Just the basic data of my offer for comparison. But sure, €15k without KNX and LAN only in relevant rooms.

pay the rest in cash.

Tax evasion is uncool.

Tax evasion is uncool.

...who says I can’t pay my invoices in cash? It doesn’t necessarily have to be tax evasion. At least not always.

If it saves money, it usually does so after all.

If it saves money, it usually does.

EL also saves money

Maybe Zaba means it will be settled directly with the craftsman and not through the [GU].

We have also settled the variations on the construction site directly with the companies against invoice. The [GU] is missing and cannot pass it on 1:1.