Why building a house almost always costs more than calculated

Technical Connection Conditions

He is building with Weberhaus, which are prefabricated houses.

... whose walls are made of wood, which they are very proud of. They call it eco-whatever. Wood with mineral wool, I mean.

Technical connection conditions

Ok. But Weberhaus is said to have told him that fire protection laws changed in 2017, and that this has been known since May 2017. And now the electrical box is two to three times more expensive. And, do you believe that? We, belonging to the Federal Republic of Germany, also built in 2017, from 3-9.17. And there was nothing. The electrician did it as always, Siemens circuit breakers and RCD. Stove, washing machine, dishwasher (yes, I can also use abbreviations), oven, individually secured. Karsten

In my opinion, this is a matter of planning. The periods of the exceptions are fixed. Why not inform the customer about this immediately upon signing the contract.

I am not very technically skilled, so I will now quote from my equipment description:

"DIN VDE 0100-420 (VDE 0100-420):2016-02 is currently being revised internationally and is also to be introduced in Germany. This standard requires the installation of so-called residual current devices (fire protection switches). The installation of these switches in single-phase AC systems with an operating current not exceeding 16 A is mandatory for new buildings upon completion of the electrical system starting from 18.12.2017.

The following measures will be implemented:

- Larger meter cabinet, additional distribution panel
- Fire protection switches according to technical specifications

These devices are intended to limit the risks of fire in consumer circuits due to residual currents."

And that costs €3,000.

!? As I said, unfortunately I am not a technology guru. Therefore, I cannot even say whether this amount is reasonable or far too high. I just don't know. In any case, it annoys me that I was only informed about this during the equipment consultation at the factory half a year after signing the contract (and 5 months after this guideline became known).

Anyway, it annoys me that I was only informed about the equipment consultation at the factory half a year after signing the contract (and 5 months after this guideline became known).

The application start date was set to 01.02.2016; all conflicting standards must be withdrawn by 17.02.2017 at the latest. I suppose you signed your contract later.