Schurik19855
2020-02-06 16:44:46
- #1
Hello everyone,
we are about to build a city villa measuring 10m x 10m with a single-story bay window at the back measuring 4x1 meters. However, in the upper floor (OG), it remains 10x10m without the bay window. Now we have extended the bay window down to the lower edge of the house to 6 meters. This means the walls in the upper floor no longer stand on the lower walls in the basement (UG). This has added 2.9 m² of living space, and the construction company wants 11,800 EUR more for that. That is about 4,000 EUR/m². The roof of the bay window is not even included here.
That’s not normal, right? Of course, it affects many trades, but not in total. Most of the costs come from the base slab, screed, reinforced concrete ceiling to the upper floor (which has to be made more stable). Is the construction company trying to rip me off? They have tried that a few times before, but I was always able to prove that it was not the case, which they always acknowledged.
Attached is the planning before and after.
Do I have to ask the construction company to list the costs by trade if I ask for it?
Thank you in advance for your feedback!
Best regards

we are about to build a city villa measuring 10m x 10m with a single-story bay window at the back measuring 4x1 meters. However, in the upper floor (OG), it remains 10x10m without the bay window. Now we have extended the bay window down to the lower edge of the house to 6 meters. This means the walls in the upper floor no longer stand on the lower walls in the basement (UG). This has added 2.9 m² of living space, and the construction company wants 11,800 EUR more for that. That is about 4,000 EUR/m². The roof of the bay window is not even included here.
That’s not normal, right? Of course, it affects many trades, but not in total. Most of the costs come from the base slab, screed, reinforced concrete ceiling to the upper floor (which has to be made more stable). Is the construction company trying to rip me off? They have tried that a few times before, but I was always able to prove that it was not the case, which they always acknowledged.
Attached is the planning before and after.
Do I have to ask the construction company to list the costs by trade if I ask for it?
Thank you in advance for your feedback!
Best regards