Large garage planned for new construction

Hello everyone,

we are planning a large garage for our new single-family house. We are bound to boundary construction and our plot becomes slightly wider towards the back. The dimensions of the garage would therefore be 6.43 - 6.58 x 6m. The first offer we received amounts to 32,000 EUR, including the floor slab, flat roof, side entrance door, door to the garden, and electric sectional door. Is the price realistic or does anyone have tips for a cheaper alternative?
Thank you very much and best regards

Border construction - that would be unusual, as getting 6m height allowed (?)

Already 6x6m gate area is "not cheap," it also has to be wind-resistant...

How does one come up with such garage dimensions - a luxury motorhome does not fit in 6m length, and for normal vehicles you don't need the extra height?

Not 6 m height but standard height
Length: 6m
Width: 6.43 - 6.58 as it is wider towards the back

15 cm width difference front / back over 6 m length is a stupid measurement, not quite straight and not quite crooked :-(

Special cases always cost extra, because you have to deviate from standard parts. It would be possible to make the side walls parallel and compensate at the back wall, so rather with length difference instead of width difference?

Does the garage have to fit completely into a "corner"?

Unfortunately, that is not possible. The garage must conform to the boundary because it is built in a chain construction. So, someone will eventually build a house onto our garage. I am aware that a prefabricated garage is ruled out due to the dimensions, but with walls, the dimensional deviation should be easy to compensate for, right?

That means the garage exactly fills one building gap, except the gate side everything is built in (but you wrote about a door to the garden)?

Post a plan section, then you have a concrete picture of the situation in mind.

Standard parts are right-angled, stones and materials for formwork construction are too. Fiddling costs time, time costs money. Such one and a half degree deviations can sometimes still be mortared away, but precisely the small "slants" are sometimes also the trickiest. A non-continuous width also means more calculation for the structural analysis.

In my area, there is a "ready-made" garage builder with the same last name (but not related), who builds with pumice slabs. They also make boundary-adjacent garages out of it.