Opinions on single-family house floor plan

: Well deduced, probably mainly recognized by the green ;)?

Among other things - I know my competitors quite well ;)

The problem is that the reservation of the plot will expire soon and an extension of the reservation is not possible because several other interested parties are still on the list.

I can understand that, but it should not be the reason to give up the plot if you want/can purchase it. The seller should have already named you a price for the design, right? Otherwise, I can gladly estimate it for you if you think it could help you in the decision for or against the plot. However, house prices can only help you to a limited extent; it is always possible that additional costs arise due to the soil conditions of the plot.

Rhenish regards

Thank you for the offer, I gladly accept.

Our current invoice for everything looks like this (hope this is enough as information):
Land: €80,000
Real estate transfer tax/notary (7.5%): €6,000
House itself: €220,000 (133.94 m² or 120.19 m² living space + WU basement)
House connection costs: €12,000
Surveying/building application: €2,100
Construction water/construction power supply: €1,000
Soil survey: €550
Property-specific work (soil removal, filling, clearing, etc.…): €10,000
Other ancillary construction costs (various official procedures): €3,500
Outdoor area: €5,000 (I know this will only cover the rough work)
95 sqm laminate ~€20: €2,000
Wallpaper: €2,500
We are also planning an external construction manager: I hope we are not too far off with ~€4,000

Totals approximately: ~€350,000

Our current calculation for everything looks like this (hope this is enough as information):
Land: €80,000
Real estate transfer tax/notary (7.5%): €6,000
House itself: €220,000 (133.94 m² or 120.19 m² living area + waterproof basement)
House connection costs: €12,000
Survey/building application: €2,100
Construction water/construction electricity provision: €1,000
Soil report: €550
Land-specific work (soil removal, filling, clearing, etc.…): €10,000
Other incidental construction costs (various official procedures): €3,500
Outdoor facilities: €5,000 (I know this will only cover the roughest)
95 sqm laminate ~ €20: €2,000
Wallpaper: €2,500
We are still planning an external construction supervisor: I hope we are not too far off with ~€4,000

Total: ~€350,000

This is what my estimate looks like:

Land: TEUR 80
Single-family house according to KfW 70: TEUR 214
Usable basement made of waterproof concrete and executed as a white tank: TEUR 48 (without additional costs due to exposed masonry)
5-phase inspection during the construction period; e.g., TÜV: TEUR 3.5
Incidental construction costs: TEUR 40
Painting/flooring work in EL: TEUR 20
Outdoor facilities in EL: TEUR 10 (only the essentials)
Reserves for extras: TEUR 10

Estimated all in: TEUR 425.5 for RP.

We are now some thousand euros apart; if I base your price expectations for painting work and flooring as well as outdoor facilities (knowing well that you will not make it with that), only TEUR 45.5 remain; but that is also money.

In my estimate, I have not yet taken into account the additional costs due to a slight slope; these can only be calculated precisely once the terrain is filled. But there could also be several thousand euros lurking here. However, based on your information, I cannot see that it is a real slope. Are you sure you should not better add fill? It would be fatal to have to bring the water (rainwater in this case) from the street—with a higher level—to the single-family house. It would also be cheaper than a basement; especially executed as a waterproof basement. Even in the case of filling, there would be substantial additional costs, but in my opinion better invested and cheaper than the other option.

PS: the competitor, among other things, likes to work with truss roofs to visually lower the sales price. However, the requirements for truss roofs have increased. The timbers that are still allowed to be used now are considerably more expensive than the supplier’s calculations assumed in the past. Conclusion: a truss roof is not cost-effective.

Rhenish greetings

Phew, that is already a difference.

What do you mean by "anschütten"?

The plot is flat, but the street will be about 1 meter higher overall (the building authority said this is because otherwise they couldn't access the sewer).
All the GCs we talked to said that piling up for a slab foundation doesn't pay off because you have to build on natural soil and otherwise have to work with pad foundations(?), which are expensive?

What do you mean by "anschütten"?

Adjust the terrain of the house area + workspace to the level of the street.

All the general contractors we spoke to said that filling in for a slab foundation doesn't pay off because you have to build on native soil and otherwise have to work with pier foundations(?), which are expensive?

This is a calculation example and I would have it substantiated with exact figures if I were you. I hardly believe—knowing that even gravel is not inexpensive—that the fill of 1.00 m will be as expensive as a basement built as a waterproof shell plus the costs of necessary earthworks and plastering of exposed masonry. But—as always, I do not have a monopoly on wisdom; maybe I'm just thinking incorrectly ;) Rhenish regards

In reverse, the house would probably have to be a bit bigger, since at least the utility room + storage space would have to be removed from the basement.

But that probably goes beyond the scope here to try to break down the costs.

Thanks for the hint, I'll take it into planning.