Rough cost calculation based on floor plan

Pardon, I had understood the 550k as the house budget in the rough calculation and forgot the land, that also needs to be paid for....

I would be very happy to receive further feedback.

Thank you.

Hello,

So far, the economic situation has been clarified with the result that a budget of 555 TEUR is available.
The following key data is known:
Energy standard: KfW 70
No basement (as can be seen from the floor plan)
Heating: wood log boiler
Double garage
Roof: gable roof or flat roof (?); preferably no roof slopes
Own work(s): complete electrical installation, all floors will be laid by own work, outdoor area (planting, lighting, paving work, ...)
Standard: normal to upscale (certainly no golden roosters but also no laminate from the hardware store)

About 240 sqm/living space are planned, the costs minus own work should be around TEUR 370 for a single-family house with flat roof; another good TEUR 25 for a masonry garage 6 x 6 including sectional door. Whether KfW 70 can be achieved with the boiler, I cannot assess; you have to wait for the calculations.

Plot costs: 120 TEUR including commission, notary and tax; rural area, according to questioning of neighbors (left and right of the plot) no factors related to complex foundation known

Planned budget: TEUR 555

less

Plot TEUR 120
House: TEUR 370
Garage: TEUR 25
Additional costs: TEUR 30
Reserve for additional foundation costs: TEUR 8
Own work (tiles, floors, electrical): TEUR 25
Painting work: TEUR 15
Outdoor facilities: TEUR 15
Reserve for extras: TEUR 10

results in an "undercoverage" of TEUR 63. That means I see the total investment volume—at medium standard—rather at TEUR 618 +/- 10. And—depending on the location in Bavaria—this can deviate upwards by a good 5-8%.

Best regards

Thank you very much for the (quite detailed) experience feedback!

I derive the following assumptions from your response:

The house costs about 395 TEUR without furniture, but with windows, doors, floors, heating, etc. (Correct?)
This results in a price per square meter of around €1646/m².
The remaining costs, such as garage and outdoor facilities, are independent of the living area and therefore always remain fixed.

Conclusion (Top-Down):

Total budget: 555 TEUR
-Fixed costs:
Garage 25 TEUR
Additional costs 30 TEUR
Reserves 12 TEUR (I increased this again by 4 TEUR)
Outdoor facilities 15 TEUR
-Land 120 TEUR
= House 353 TEUR
(+ EL XXX TEUR)

Maybe you or someone else can "educate" me a bit more:

With the present floor plan, some square meters of living space are attributed to the terrace or roof terrace. Can you also expect a price of around €1646/m² there?
What does an average single-family house cost? (nationwide)
Is a lower KFW standard possibly an option? I can get firewood very cheaply (at cost price).

Thanks!

It must say:

Maybe you or someone else would like to "enlighten" me: ....

Hello,

Thank you very much for the (quite detailed) experience reports!

You're welcome

I derive the following assumptions from your answer:

The house costs about 395 TEUR without furniture, but including windows, doors, floors, heating, etc. (Correct?) This results in a price per square meter of around €1646/m².

Cumulatively, that is correct; I have — besides the FD — also considered the costs of the roof terrace — which actually does not belong to the "normal" house price.

The remaining costs, such as garage and outdoor facilities, are independent of the living area and therefore always fixed.

“Independent” — yes, and “fixed” — no; it depends — again — on your personal taste how high the actual costs will be.

With the present floor plan, some square meters of living space fall on the terrace or roof terrace. Is a price of around €1646/m² to be expected there as well?

No, here I have considered the costs of waterproofing, the surface covering, and a surrounding stainless steel railing; which results in costs of roughly TEUR 6–7.

What does an average single-family house cost? (nationwide)

Straightforward architecture and SD at about €1,500.00/sqm/living space as a KfW 70 efficiency house.

Would a lower KFW standard be an option? I can get firewood very cheaply (at cost price).

Even though we hand over “vacuum flasks” today, I consider KfW 70 to be contemporary and appropriate, at least regarding the building envelope alone. Whether you want to use renewable energies at this point in time depends firstly on the requirements of the land seller (several municipalities require KfW 70 or higher) and secondly on your financing path. If you want to make use of KfW funds, of course you have to play the music that is demanded.

And whether you always want to fetch, cut up, and store wood is also your decision

Best regards

Thank you for the further response!

I have one last question: Is a foundation slab included in the calculation? Probably not. How high are the costs for one?

Best regards