Construction cost planning KFW 55 realistic???

Hello,

I have been reading in this forum for some time now. Since I have read relatively little about construction costs in Saarland so far (which I think is a rather inexpensive area), I would be grateful if someone here could assess/estimate whether my budget planning for our project roughly adds up.

The plan is for a single-family house with 150 sqm living space and a prefabricated basement. The floor plan is simple, no bay windows/conservatories etc.
Ground floor: open living/dining/kitchen area, guest room, guest WC, small storage room
Upper floor: 1.3 m knee wall, 2 children’s rooms, master bedroom with dressing room and bathroom
Basement: technical room and 2 or 3 rooms as storage
Heating should be a [LWWP] with underfloor heating throughout the house and basement
It should be a [Kfw 55] house, preferably monolithic with bricks
Soil survey is available, soil class 3-5

I would like to not exceed a total budget of 400,000 euros
Plot: is now available, costs 70,000 euros including property transfer tax
Additional construction costs: 65,000 euros, which I think is estimated quite generously

=> thus about 265,000 euros would remain for the house construction

Is the calculation somewhat realistic?

Thanks in advance for all helpful answers!

had forgotten to mention that the property is already fully developed

Depends on what exactly should be included in the 400,000. For example, is a kitchen already factored in, outdoor facilities, garage, what can or do you want to do in EL? I can at least tell you this much, our plot of land cost a very reasonable 42,000 (fully developed), we have about 135 m² on 1.5 floors plus cellar, air-to-water heat pump, ventilation system, built according to the Energy Saving Ordinance 2009 (KfW70) and with EL worth about 20,000 - 25,000 we come to a total amount of about 400,000.- € The price then includes some furnishings (kitchen, bedroom, couch, lamps, paints, wallpapers...) and about 20,000 - 25,000 for the outdoor facilities (that adds up quickly!!!) Incidental construction costs, as I define them, were about 30,000.- €. The house itself, as it is with a few extras, turnkey including floor coverings in 2012 would have cost about 240,000. Since then, however, construction costs have risen, you want to build about 10% larger and also Kfw 55, which back then would certainly have cost another 10k€. I would say, except with Town & Country or Heinz von Heiden it will be difficult if you don’t do a lot yourself...

The incidental building costs include 15,000 euros for the outdoor area... Kitchen is separate, we are building without a garage... We have all the furnishings as specified by you, since we already own a 136 sqm house. Tiling, painting, and some plumbing work will be done as own work.

I would say, except with Town & Country or Heinz von Heiden it will be difficult if you don’t do a lot yourself...

Town & Country charges about €35K for that, just talked about it with them last week

The plan is a single-family house with 150 sqm of living space with a prefabricated basement.
It is to become a Kfw 55 house, preferably monolithic with brick

I could imagine that 265k€ will be very tight. We are at about 275k€ for our Kfw55 bungalow (165m², monolithic, ground-source heat pump) in Brandenburg.