Assessment Financing Offer DDH (massive)

Hello everyone,

we are planning to build a semi-detached house in the Rhein-Neckar-Kreis area, the plot is available.
Attached are the most important key points from my perspective.

[*]Semi-detached house 2.5 floors
[*]160m² living space + 60m² utility basement
[*]Shower bathroom in the basement and attic. Family bathroom on the upper floor
[*]Flooring on the ground floor, upper floor and attic parquet/tiles with max. 44 €/m² material costs, screed in the basement
[*]Gable dormer on one side of the roof
[*]Air/water heat pump
[*]Apartment ventilation system with heat recovery
[*]Shower/WC in basement and upper floor, bathroom on upper floor
[*]Venetian blinds on ground floor, upper floor and roller shutters + 2 skylights in attic, all electrically except skylights
[*]Walls with textured wallpaper
[*]Underfloor heating
[*]Not included in the offer are outdoor facilities, garage, kitchen
[*]KfW 55 (the provider builds KfW 55 as standard. However, I think it doesn't make sense without subsidies and the difference to KfW 70 won't be recouped. Therefore, the plan is to go for KfW 70.)

Fixed price 583,000€
Additional costs: 44,000€

I ask for your assessment, do you find the price normal/too high?

Thank you in advance.

Price is ok. What would be the alternative?

[*]+ 60m² usable basement [*]shower bathroom in the basement

Don't fit together... Shower bathroom basement without heating?

Don't fit together...
Shower bath basement without heating?

A sauna is planned in the basement, hence the shower bath. Underfloor heating is installed in all rooms except the utility room.

Price is okay. What would be the alternative?

I am waiting for the offer from another general contractor. A couple of friends have had good experiences with him, and I also found the first conversation great. The problem is that he does not offer a fixed price. According to his rough estimate, however, he is 10-15% below the offer.

However, I am not sure if one should take the risk of building without a fixed price in these times.
What do you think?

I am not sure, however, if one should take the risk of building without a fixed price in these times. What do you think?

It all depends on your financial cushion.