Single-family house with basement - Planning - Please comment

Hello Building Expert,

thank you for the answer.

As things currently stand, we want to build with an architect and award the trades individually. So no prefab house builder.

Sorry Building Expert, I can’t quite follow your calculation. :confused:

I hope my listing contributes to better understanding.
It would be nice if you could enter your estimated prices.

House Kfw70 + Garage (Pure construction costs: earthworks; shell construction; electrical; plumbing; plastering; windows + doors; tiles; heating without drilling; incl. painter + flooring):
Estimate NEO: TEUR 290
Estimate Building Expert: TEUR ???

Additional costs ([Kontrollierte-Wohnraumlüftung mit WRG], drilling geothermal heat pump, external shading, chimney):
Estimate NEO: TEUR 30
Estimate Building Expert: TEUR ???

Outdoor area (parking lot + paving, patio, garden landscaping):
Estimate NEO: TEUR 20
Estimate Building Expert: TEUR ???

Ancillary costs (architect, service phases 1-9; statics, surveying, house connections, surveying, building application, etc.)
Estimate NEO: TEUR 50
Estimate Building Expert: TEUR ???

Total:
Estimate NEO: TEUR 390
Estimate Building Expert: TEUR ???

Regards, neo

Hello Neo,

Hello construction expert, I hope my list contributes to better understanding. It would be nice if you could enter your estimated prices.

Gladly. All price estimates are based on experience and refer to awarding a contract to a high-quality and reputable prefabricated house provider. As I have just seen, I "overlooked" the garage...

House KFW70 + Garage (Pure construction costs: earthworks; shell construction; electrical; sanitary; plaster; windows + doors; tiles; heating without drilling; including painter + floor):
Estimate NEO: TEUR 290
Estimate construction expert: TEUR 366 including costs for architecture and structural engineering
Estimate garage with FD construction expert: TEUR 21.6

Additional costs (controlled residential ventilation with heat recovery, drilling for geothermal heat pump, external shading, chimney):
Estimate NEO: TEUR 30
Estimate construction expert: TEUR 36

Outdoor facilities (parking space + paving, patio, garden landscaping):
Estimate NEO: TEUR 20
Estimate construction expert: TEUR 20

Incidental costs (architect, performance phases 1-9; structural engineering, surveying, house connections, surveying, building application, etc.)
Estimate NEO: TEUR 50
Estimate construction expert: TEUR 35-40 - don’t forget reserve for additional foundation costs!

Total:
Estimate NEO: TEUR 390
Estimate construction expert: TEUR 483.6 without reserve for additional foundation costs and without reserve "x" for extras

If you want to plan and award through an architect, you should consider another TEUR 5-7 for external construction supervision by an expert or TEUR 3.5 for the 5-phase inspection by TÜV.

Kind regards

Hello construction expert,

phew, that’s intense.
I need to digest that first.
Honestly, your estimate seems a bit high to me.

The main difference in our estimates lies in the house + garage:
TEUR 290 for house + garage (including architect + structural engineering I would be at TEUR 325) compared to your TEUR 387.6 (house + garage).
That makes a difference of TEUR 62.7.

Friends of mine built a comparable house 2 years ago with a reputable solid house builder from the region (city villa, KFW70, fully basement, 170sqm living space, medium standard) for TEUR 275 (including structural engineering + architect, who came from the house builder, without additional costs, without garage, without outdoor facilities, without extras).
The price is certain (I saw the invoice with my own eyes).
TEUR 100 were spent on additional costs + garage + outdoor facilities + extras
Total: TEUR 375

I thought I had calculated generously with TEUR 390 + reserve.

Looking forward to further comments.

Regards, neo

Hello Neo,

Your estimate honestly seems a bit high to me.

I usually calculate with € 1,400.00 - 1,500.00/sqm/living space (depending on the size of the house) - if it is a solidly built Kfw 70 efficiency house. For prefabricated houses, the quality differences are even more drastic, so a serious estimate starts at € 1,800.00 per sqm/living space. Of course, it is always possible to do it cheaper – but where cheap leads to has just once again been proven by IBG; the relevant forums are overflowing with complaints about the very cheap prefab house providers :-(

The main difference in our estimates is for the house + garage:
TEUR 290 for house + garage (including architect + structural engineering, I would estimate here at TEUR 325) compared to your TEUR 387.6 (house + garage).
That makes a difference of TEUR 62.7.

Yes, if you build with a serious provider, this is the value of the construction project. I can’t tell you how much you save if you contract it separately. However, since the construction industry is currently doing very well, the savings are likely to remain within a manageable range.

Just your external shading – if it is from a qualitatively valuable provider of such systems – comes to TEUR 10. A controlled residential ventilation system with heat recovery for a house of this size is in roughly the same range, and the drilling for the geothermal heat pump “can” pose an immense risk, so I have also estimated TEUR 10 here. If it ends up costing less later – even better, it leaves room for one or the other extra; if not, you won’t fall into a deep hole financially. Rhineland-Palatinate is not exactly one of the cheapest regions for building a house :-(

Friends of mine built a comparable project two years ago with a serious solid house builder from the region (city villa, KFW70, fully basement, 170sqm living space, medium equipment) for TEUR 275 (including structural engineering + architect, who came from the house builder, without additional costs, without garage, without outdoor facilities, without extras).
The price is certain (I have seen the bill with my own eyes).
TEUR 100 were spent on additional costs + garage + outdoor facilities + extras
Total: TEUR 375

I believe you at first glance; only – on the one hand, you are describing the value of a solidly built property and you want to build a prefab house; prefab houses are always more expensive, at least the qualitatively valuable ones among them. On the other hand, construction prices have risen immensely over the past two years.

I am not responding here to “sweet-talk” users or because I enjoy upsetting them – but to bring them back to reality. If you distance yourself from the prefab house, your house construction will also become cheaper. I would assume that you can then expect a base price of TEUR 300 … plus special wishes and then your desired budget will come back into tangible reach ;)

Kind regards