Financing construction project single-family house 140 sqm + basement (Bavaria)

Hi,

I'm speaking up again, we now have the first offer for our house.
What do you say about the costs quoted... with the following key data.

Dimensions: 10.50 m by 8.25 m

Now with the information... I sent it too quickly.
Hi,

I'm speaking up again, we now have the first offer for our house.
What do you think about the requested costs... with the following key data.

Timber frame construction
Dimensions: 10.50 m by 8.25 m
Living area: 130 sqm

The following prices (rounded) are requested for the turnkey execution.

Base price: €241,000 (incl. wood-aluminum windows & front door from Höhbauer)
Heating: €29,000 (IDM - iPump A3-11)
Ventilation system: €14,500 (Zehnder Comfoair Q350)
Sanitary including bathroom fittings: €20,000 (Richter + Frenzel Series MyStyle)
Electrical: €16,000 (electric venetian blinds on the ground floor and roller shutters on the upper floor)
Electric screed: €3,800
Plastering/jointing: €11,000
Painting work: €4,800
Tiles incl. €40/sqm material: €12,500
Parquet incl. €50/sqm material: €10,800
Interior doors: €4,800
Staircase: €8,000

Utility basement: approx. €70,000
Basement finishing: €32,500
Photovoltaics: approx. €12,000 for 10 kW

Total: approx. €490,000

The following offers are unfortunately still missing.
Carport
Terrace

Question about the heating system, what do you think would be the surcharge for a ground source heat pump?

Which costs are still missing as ancillary building costs?
Outdoor facilities are not an issue, because it will be built in the second row and the excavation does not have to go to a landfill but can be used on the adjacent field.

I hope to have the floor plans revised next week.

Thank you very much for your opinion.

Costs for the exterior facilities account for only a fraction of the disposal of the excavated soil. What about the access road, stair landing, splash guard, extension of a light well for a basement room, etc.?

Now with the details... I submitted too quickly. Hi, I’m speaking up again, we now have the first offer for our house. What do you say about the requested costs... with the following key data. Timber frame construction Dimensions: 10.50 m by 8.25 m Living area: 130 sqm The following prices (rounded) are quoted for the turnkey execution. Base price: €241,000 (incl. wood aluminum windows & front door from Höhbauer) Heating: €29,000 (IDM - iPump A3-11) Ventilation: €14,500 (Zehnder Comfoair Q350) Sanitary including bathroom equipment: €20,000 (Richter + Frenzel MyStyle series) Electrical: €16,000 (electric blinds on the ground floor and roller shutters on the upper floor) Electric screed: €3,800 Plastering/grouting: €11,000 Painting: €4,800 Tiles incl. €40/sqm material: €12,500 Parquet incl. €50/sqm material: €10,800 Interior doors: €4,800 Staircase: €8,000 Basement for utility purposes: approx. €70,000 Basement finishing: €32,500 Photovoltaics: approx. €12,000 for 10 kW Total: approx. €490,000 The following offers are unfortunately still missing. Carport Terrace Question regarding heating, what do you think would be the surcharge for a brine heat pump? Which costs are still missing as incidental construction costs? External facilities are omitted, as the construction will be in the second row and the excavated earth does not have to go to a landfill but can be used on the adjacent field. Hopefully, I will get the floor plans revised next week. Many thanks for your opinion.

How does this fit with the previously mentioned exterior dimensions?

Costs for the outdoor area only account for a fraction of the disposal of the excavated soil. What about the driveway, stair landing, splash guard, an extension for a light well for a basement room, etc?

A driveway is not needed, the property is accessed from the north where the parking spaces and carport are planned; that means only a paved path to the house is missing.
You are right about the landing and splash guard, I still have to inquire about that. Thanks

How does that fit with the previously mentioned external dimensions?

These are now the dimensions that may be built on with the given clearance areas, etc. But that was not what I was concerned with in the cost breakdown, rather only an evaluation of the offered prices; too high, low, what is missing... etc.