House Construction Cost Estimation - Does this fit?

No no, for the dreamer of the 240m² pad, this would be a social housing. Besides, the huge space-consuming heating system, for which the basement has to be built, is missing...

Don’t know… the dreamer barely revealed his standard and was very sober or passionless (like this design), only that the planning had to go quickly. And a dreamer can dream a lot of things, including the "increased" space requirements of a gas heating system ;)

I would rather skip luxury (garage, etc.) and instead invest in passive house, plus energy house, insulation, modern heating and control technology (SmartHome). These things are usually not retrofittable with reasonable effort.

Please also invest accordingly in a properly sized emergency power supply, since the ventilation also fails during a power outage, which can be somewhat unpleasant in a passive house...

Hello,

this is purely about the cost estimation of the planned house.
It will be built in Bavaria (rural).

Two full floors = 200 sqm
Double garage = 60 sqm
Fully basemented
Gas heating
Medium equipment
Wood stove


Ground floor:


Upper floor:


Basement:


Many thanks for your assessments!

Best regards

The upper floor is not acceptable. For this size, you make two combinations of a) bedroom, dressing room and master bathroom and b) the children's rooms and the children's bathroom with shower/toilet.
In your case, the balcony would also fit the combination under a).
And with two children and this house size, you need a laundry chute from the upper floor. (This is more important than, for example, a perfect KNX for ventilation control in the passive house)

We built with a gas heating system in 2017 because it saved us many thousands of euros. Our entire underfloor heating system is designed for low temperature; it could be directly replaced by a heat pump. However, I see no reason for that.

For 170 sqm with a fireplace and solar thermal system, we use about 18,000 kWh per year from the basic supplier at 9.6 cents per kWh. (A high gas price unfortunately also drives up electricity prices.)

Due to the current situation, there is much uncertainty and movement in the gas market, but this will also subside again and the price will stabilize, of course no longer at pre-crisis levels.

The immediate heat that a gas heating system provides "at the push of a button" is also nice.

I think I would install a heat pump in a new building today as well, but I do not think a gas heating system is wrong. The large amount of money that a heat pump would have cost me back then I have not paid in additional gas costs over many years.

We built with gas heating in 2017 because it saved us many thousands of euros. Our entire underfloor heating system is designed for low temperature, it could be directly replaced by a heat pump. However, I see no reason for that. We have about 18,000 kWh per year at the basic supplier with 9.6 cents per kWh for 170 sqm with a fireplace and solar thermal. (A high gas price unfortunately also drives up electricity.)

Did you also build with windows and front door? I ask because of > 100 kWh/sqm/a with an existing fireplace....

How does the difference come about? Otherwise, completely the same setup for the underfloor heating?

Fireplace for gas heating - not for heat pump
Gas house connection - not for heat pump
Chimney sweep for gas - not for heat pump
Maintenance for gas - not for heat pump

I assume that you will end up with a significantly lower difference in acquisition costs considering all expenses. However, gas will be significantly more expensive in operation. Furthermore, gas reduces the value of your house significantly over time.

A lot of babble, little substance. The gas price will settle long-term at a level of 12-15 cents/kWh, provided we truly never import gas from Russia again.
Where the electricity price will go—you'll be surprised if we actually want to do without coal in addition to nuclear power by 2035.
Because that is simply impossible without "green gas" or "green hydrogen" in large quantities...

And enough gas will then be available for those who were clever enough not to install an air-to-water heat pump... which ideally runs with a seasonal performance factor of 3.5, but usually significantly less ;)

The difference of 20,000 EUR is currently by no means unrealistic. You first have to save that again until the air-to-water heat pump gives up the ghost...

PS:
But we've had the pleasure before. Have you read a few studies by now or do you still believe the advertising brochure of your air-to-water heat pump supplier? ;)