Hello everyone,
I hope it’s okay if I join in here with a similar question, the discussion here has already helped me a lot.
We are planning a new building in the Stuttgart area (with an architect) and have received a cost estimate from an HVAC company that is supposed to do the planning first. I am somewhat surprised by the total amount (a good €120,000 net, so about €140,000 gross) and would like to know whether this is realistic – so far, we had planned around €100,000 gross for HVAC. Floor coverings and walls are of course budgeted separately.
The corresponding estimates are attached, especially the amount estimated for the [LWWP] seems very high to me when I compare it here in the forum – what do you think about the other values?

A brief summary of our project:
- Upper floor: 1 master bathroom and separate WC (total about 10 sqm); one children’s bathroom (about 5.5 sqm)
- Ground floor: 1 guest WC (a good 2 sqm)
- Basement: utility room, technical room (side by side)
- all bathrooms are planned directly above/beside each other
- heated area with underfloor heating about 240 sqm over 3 floors
- central controlled residential ventilation ([in cost estimation but not yet included])
Is it feasible with €100,000, or were we too optimistic? Standard should be good, but not luxurious. We are building according to the Building Energy Act, since KfW doesn’t pay off for us.
Thanks!