ᐅ KfW40, Funding Program 300 "Low-Income Households"

Oberhäslich schrieb:

Construction electricity for 3-5k€? Where do you live and how much does electricity cost there? We are currently paying 33.4 cents per kWh for construction power. Aside from the heating program, there shouldn’t be much electricity used. Dryers and heaters aren’t really necessary… Otherwise, most of the craftsmen’s tools run on batteries.

Battery-powered tools also need charging, although those are probably just small devices. What really uses a lot of power are things like cranes, plaster silos, machines, and screed silos (with on-demand water heaters). In winter, the tradespeople often run electric fan heaters. If the device has a three-phase power plug, you know what that means. Screed drying consumes a lot of power and usually takes place shortly after the base plaster is applied inside, so there’s a lot of moisture. You can manage without a construction dryer if you live next to the site and ventilate five times a day. Towards the end of the screed drying, the plasterers come and start taping everything up for the finish plaster and painting. By that point, the construction dryer is usually already gone and needs to be brought back in.
All the high-voltage electrical work can no longer be managed with an extension cable from a neighbor. Even if the neighbor has a three-phase supply in their garage, it is most likely not sufficiently protected.

Oberhäslich schrieb:

Otherwise, many of the craftsmen’s tools are cordless.

That almost sounds like Habeck.

The tools don’t need power—they run on batteries!

Thank you very much for the little satirical remark.

There is no three-phase power... for the hundredth time...

In the end, we had just under 500 kWh on the construction power meter. Therefore, 3,000–5,000 EUR for construction electricity is completely unrealistic. That would equal 9,000–15,000 kWh.
Absolute nonsense.

And with us, after the screed, nearly 6000 kWh passed through. I don’t know about the rest; that was at the general contractor’s expense. The world can be so different.

PS: I don’t care what the official standards say about three-phase power or not. Colloquially, it exists.

HausNummer 9 schrieb:

I won’t continue writing here for certain reasons.

That was to be expected from the start.
It’s a pity you already signed the contract and didn’t join this discussion earlier.
If this were my project, I would still seek advice here because it’s free, honest, and full of valuable experience. Even if it’s tough at first to accept some hard truths, in the end, you can only benefit.

Unfortunately, I also see some financial gaps and probably a few surprises ahead for you. My recommendation: negotiate with the general contractor (GC) to allow removing certain items from the contract if it looks like the budget won’t be sufficient. This is by no means shameful or a sign of poor planning. Something unexpected almost always happens, and costs can easily increase by $20,000. We also arranged the tiling as a DIY job and had the contractor remove it from their scope because we ran out of funds.

Oberhäslich schrieb:


Just as an example from our experience:
Water connection all inclusive 1300€ for 5m (16 feet)
Electricity connection all inclusive 1500€ for 15m (49 feet)
Sewage connection free, own excavation contractor up to the manhole 2100€ including 25m (82 feet) DN110/160
Telecom all inclusive 899€ for 15m (49 feet)

Surprisingly, additional costs came up for us:
Soundproof windows +5,000€
Radon sealing +5,000€
More excavation/removal 20,000€ instead of 10,000€ according to the quote

Otherwise, I think many here are too strict. There are also home builders who don’t have high demands.

Have you added up your costs.. but how can soundproof windows be a surprise?

Here again, apples are being compared to oranges—a prefab house with dry screed, in summer probably only 500 kWh is needed.

A more detailed 250 m2 (2,690 sq ft) house with traditional screed and heat pump plus electric heating rod rather consumes 5,000 kWh. Then in winter, when the construction workers are cold, you already have 10,000 kWh.

@HausNummer 9

Everyone contributing here is basically right, just take all this as helpful advice.