Is basement area more expensive than living area?

How about heights and roof pitch for you?

Max height 8m, with 2 full floors. That leaves max 22° roof pitch, and an attic height where I can just about stand in the middle of the gable roof - with a pull-out ladder. Okay for old toys, rather impractical for things I need more often.

How about increasing the floor area by 10 sqm and giving the roof more pitch
Ground floor house technology, cleaning stuff, freezer, drinks, tools
Upper floor laundry, storage room
Attic hobby, decorations, etc. (currently planned to be 45 sqm with standing height)
Behind the garage (grill, lawnmower, parasol)

Increasing floor area will work, hence my price question cellar area vs. above-ground area. Serious use of the attic is out due to an excessively restrictive development plan (see above). So it has to go in the ground floor and upper floor. Behind the garage there is no space due to the plot – the bikes will probably be in the garage/carport, the car in front...
So yes, everything is definitely solvable and somehow can be accommodated, but it would have been much easier with a cellar.

One more question: Is laundry actually more practical on the upper floor, or better on the ground floor?

Here in our housing development (which has existed for about 10 years), I have noticed in the last 1.5 years with three houses that everything around the house was dug up and a basement sealing company was working on it, so I am glad that we don’t have a basement.

Exactly these kinds of horror stories will probably ultimately keep me from having a basement... Did the people who now have problems save money in any way during construction? Or good construction company, maximum monitoring level of the white tank, etc.?

A basement is only cheaper than the identical surface area if its construction is not the same as on the ground floor or attic. So no plaster, small or no windows, lower ceiling height, no underfloor heating, comparatively rudimentary electrical installation.

Thanks, that is very relevant information. So if you now create an above-ground "basement room", basically just plastered simply, only a small window or even windowless, cheaper tile covering, you actually end up cheaper than with the identical basement area? I think I’ll inquire about that.

Laundry accumulates in the bathroom and bedrooms. Just a few steps and dirty laundry is gone, rearranging etc often happens on the side, ironing and folding is done in daylight. Shower out quickly grabbed favorite shirt. Oh, it's just shorter distances. If above ground, why not where it is needed. That is not nice. How does the standing height change if the upper floor has a knee wall of 190 or 160 and the roof becomes steeper.

How does the standing height change if the upper floor has a knee wall of 190 or 160 and the roof becomes steeper

Good idea with the knee wall - but if knee wall, then maximum 50cm according to the development plan. That would be shooting yourself in the foot...

I wouldn't want the washing machine/dryer upstairs because the machines are simply too loud for me. Also, we sometimes have dirty gardening clothes, dog blankets, dog towels from cleaning paws, and previously the kids' digging pants, so a washing machine upstairs would be impractical for us.

Best regards
Sabine