Where did you include the geothermal costs?
A reasonable double garage massively integrated into the house about 30,000 euros.
Heating would be included in the 1600€ per sqm. Is a surcharge necessary because it’s more expensive than conventional heating (gas?)? How much?
Thanks for the tip about the garage. Because of the desired "oversize" with storage room, I already thought that something would have to be added.
I always think like this: what makes sense in the beginning or would later cause much more effort and costs, do it now. If you want a massive garage attached to the house, then plan it in. You will regret it later when the excavators roll in again in 3-4 years to build the garage or when your great cheap prefab garage has already deteriorated.
That also corresponds to my way of thinking.
Garage included right away, when else will I have 25 (or 30 ) thousand euros available to realize this, or get such cheap money for realization.
A prefab garage is not up for debate. I personally don’t like it at all and it’s also prohibited in the development areas where we are currently looking.
Calculate the enclosed volume cbm.
Take this value times 2,000 euros/cbm. That gives you a pretty good value also considering KfW 55 and gross prices.
With 400€/cbm my calculation mentioned in the first post actually fits quite well. But I can only estimate the enclosed volume currently (as well as the above-mentioned living area of 170sqm), since we first want to check what scale our building project would have, then clarify financing, and then plan in more detail.
What about the civil engineering work? Depending on the property and soil report, a five-figure amount can add up.
In my perception, one of the biggest unknown variables. So far, it can only be said that the desired plot is almost flat and the soil report in the building area at least did not reveal any dramas for building without a basement. (With the basement, you probably have to expect stagnant water in some places).
Otherwise, these costs are included in the flat 40k incidental construction costs.
You can forget about the garden for now. For 15,000 euros you don’t even get a reasonable front garden with driveway, parking spaces and entrance.
If the mentioned cannot be realized with 15,000€, then what can be realized with 15,000€ – asking differently?
Paving driveway/entrance and sowing lawn should be doable, right?!
Furthermore, forget photovoltaic and geothermal stuff. Plan empty conduits, install a decent heat pump, and that’s it. You’ll also need a ventilation system, but you can include it in the 2,000 euro / cbm.
Photovoltaics are mostly mandatory here, unfortunately. Apparently, there are some funding pots for the municipalities here if photovoltaics are used ("100 climate protection settlements in NRW"). As a builder, you don’t benefit at all from this, but you apparently have to live with it.
I aimed at geothermal because those outdoor units of air-water heat pumps are really an eyesore. Not even considering the madness about noise emissions. Moreover, geothermal operation seems to be significantly more efficient (= lower operating costs), more reliable (keyword winter and efficiency), and significantly better subsidized (BAFA 4,500€ vs. 1,500€, if I recall correctly). Therefore, geothermal heating falls into the category for me of "do it right from the start", like the garage.
Thanks for your help!
You are almost active in the region – what do you think about it?
Also gladly a tip by PM for a clever planner in my area if you know someone. My numbers (area as well as prices) are just rough estimates, I slowly need a professional for the first draft ...