Cost savings or how much credit is given when reducing the floor plan size

Has anyone ever reduced the house dimensions of a standard house from the usual providers?
How much credit did you get per sqm?
Since I don't really like any of the standard floor plans anyway, we would have to pay for additional planning services, that's clear. However, we would have to shorten most of the offered houses by 1-2 m, so reduce about 8 to 16 sqm.

I would advise against that, because in the typical floor plans there are usually no potentials for "liposuctions"; the more successful way is to expand a smaller model towards the ridge axis. I have explained this in more detail in "Changing a floor plan in size", see also: (and also in we already discussed this topic).

Mr. @11ant this is your attempt to present the floor plan reduction cost savings rule [...] for the first time.

Not for the first time, because I already posted it on Wednesday:

Extra square meters are added at the sales price, fewer square meters are only deducted at the purchase price.

(11ant scale price mantra, full quote see: )

Shortening in ridge direction by 0.5 m brought a credit of about €3500

Unfortunately, this only succeeds under the condition that the tailor built in a fabric reserve – a rare example of such tightening potential was shown here by one Sunday week ago:

If the floor plan really already pleases that much, then I would simply remove 0.50 m in length and 0.25 m in depth.
My blue lines would each correspond to -0.25 m.

That would almost answer the question as the OP would have liked it asked (because it probably has not yet been done = carried out and priced like that, but at least proven possible here as an image example).

Here are 2 comparisons.
Fingerhaus city villa 150sqm reduced by 20sqm: 9800 euros credit
Town & Country city villa Flair 152 reduced by 20 sqm: 3400 euros credit

Here are 2 comparisons.
Fingerhaus Stadtvilla 150sqm reduced by 20sqm: 9800 Euro credit
Town & Country Stadtvilla Flair 152 reduced by 20 sqm: 3400 Euro credit

At least the balance from "saved construction volume ./. additional costs for the whole area from static recalculations and drawing changes" is positive in both examples. However, the price per square meter of the remaining 130/132 sqm (based on previously 2500 Euro) has risen to 2809 (= +12.37%) and 2853 (= +14.12%) respectively. I assume that in the same cost structures, a reduction of 10 sqm would even lead to a "negative saving balance" aka additional cost.

in our case, we simply swept out a planned covered terrace as a cutout, so we had 2 sqm more living space. It didn't cost anything at all because the walls remained the same. The heating loops and screed didn't care... floor coverings are provided by the builder anyway...

We did the same. For us, it was even a bit more and the change cost "zero" extra.
Our advantage is that we now have a slightly larger living area. :cool:

Yes, that was exactly your question EXCLAMATION MARK!!!
Calm down first...

Reducing the size of a house is trivial, but adapting a standard floor plan so that it still works is not.

As has already written, can probably answer most competently, so we are tagging him here.

If you want reasonably good estimates, you have to tell us more about the construction project: How big, how many floors, how expensive planned overall, etc.

With a 100 sqm house, I will have a different saving on 16 sqm than with a 1000 sqm house

We want to build a small age-appropriate bungalow. Since it is on a hillside location, we cannot avoid having a basement. The guest room and technical room can go into the basement right away. So we only need 70 sqm on the ground floor.
We would reduce a bungalow from Danhaus, for example, by 7 sqm, one from EBK by 20 sqm.

we want to build a small age-appropriate bungalow. Since it is on a slope, we can't avoid having a basement. The guest room and technical room can go straight into the basement. So we only need 70 sqm on the ground floor.

(Whatever age-appropriate means here…) I would always have something like this planned individually. Especially on a slope, the access from the property and garden usually determines what a standalone bungalow does not take into account. The basement could also be designed individually, since there would also be a nice garden access here.