Is this secondary construction cost calculation realistic?

Hello everyone.

We were at a general contractor yesterday to get a non-binding offer for our dream house.

I specifically asked the consultant about the additional construction costs that we will face.

He mentioned the following items:

-Earthworks: €5000
-Connection costs for sewage: €2500-€5000
-Soil survey: €1200
-Connection for water/electricity/telephone (gas omitted due to air heat pump): €6000
-Surveying costs: €1000

The house is a 140m² city villa KFW55 without a basement, with an air heat pump, underfloor heating, electric shutters, central residential ventilation for turnkey €215,000

Are the above figures REALISTIC, or are we at risk of having to budget even higher costs?

I would be very happy to hear some experience-based input.

The costs do not seem unrealistic to me. But probably each without the connection fees (which vary enormously depending on the region and provider). For the earthworks, of course, it depends on what all needs to be done. As a placeholder, I find (bei flachem Gelände und ohne Keller) appropriate.

-Earthworks: 5000€

What is stated in your construction service description, wait for the soil report, everything else is guesswork, in the worst case it could also become five digits

-Connection costs wastewater: 2500€-5000€

Handover shaft and a few meters of pipe: OK!

-Soil report: 1200€

OK!

-Connection water/electricity/telephone (gas omitted due to air heat pump): 6000€

Depending on the region OK or rather a bit tight

-Surveying costs: 1000€

Not enough! Height/location plan 1000€ + rough/fine house measurement/string scaffold 500€ + surveying for the land registry after completion of construction 1000€ = 2500€ MINIMUM!

The house is a 140m² city villa KFW55 without a basement, with air heat pump, underfloor heating, electric blinds, central residential ventilation for turnkey 215,000€

Town & Country ?

Overall a bit too cheap and I suspect turnkey is not the same as ready to move in, i.e. painting including filling and floor coverings are still missing. Own work? Material? 10,000€?

In addition, a sample reserve, I would not calculate below 15,000€: stairs, electricity, sanitary, tiles, doors, windows, etc. unfortunately often not particularly great in standard.

The house is not from Town & Country, but from the local GU.

And the [215.000€] already includes painting work ([8500€]), tiling work ([9500€]), and flooring work ([8000€]).

For the staircase, we have a choice of a wooden staircase for 5000€ or a concrete staircase (tiled) included in the price.

The house is not from Town & Country, but from the local general contractor.

And in the 215,000€ painting work (8,500€), tiling work (9,500€), and flooring work (8,000€) are already included.

Regarding the ancillary costs, I would agree with Mottenhausen, but the house seems very cheap to me, so I would examine the construction service specification closely....