Construction costs are currently skyrocketing

Hi,
I have received an interim payment for our basement. The contractor is charging me 2.5€ per KG of steel including delivery and installation. The offer is from May/June with a price adjustment clause. Does anyone have current comparison values whether I should accept this or complain? Since the steel price (index) has fallen, I thought that the construction steel must have dropped significantly as well.

Edit: Ok, just saw that the mats at the building materials dealer "around the corner" are currently at 2.05€ without delivery. I suspect there is probably not that much included then, right?

I consider €2.50/kg for reinforcing steel including delivery to be a reasonable price. We are currently over €4/kg for stainless steels and I do not see any stagnation there yet.

I consider 2.50€/kg for construction steel including delivery to be a reasonable price.

above all, it includes installation!

He uses it to heat a kiosk commercially 100%.
The chimney sweep personally visits this kiosk.

What happened: So far nothing!
The chimney heats 18/7 and regularly fumes up the area.

Maybe he installed appropriate filters? Or perhaps different regulations apply commercially than privately?

above all, it includes installation!

I completely overlooked that. Then I would congratulate myself on this price. All done right.

So in our neighborhood, someone stores about 10x8x2m high wood, cut from commercial Euro pallets, other wood scraps/cuttings from elsewhere.
Partly covered with a tarp, partly not.

Maybe he has installed appropriate filters? Or perhaps different regulations apply commercially than privately?

I have to say I don’t have a fireplace stove or wood gasifier, but I have often thought when seeing all those giveaway ads with wood scraps on eBay that you could actually do it that way. At least I find the idea totally understandable.
But I would definitely make sure it is legal, i.e. appropriate log gasifier with sufficient combustion temperature and filters in the exhaust system, etc.
I would never do that at the expense of the general public and certainly not to the detriment of my immediate neighborhood.

Is the attending chimney sweep also the district official in charge, basically supervising? Then just talk to him about it?
Or report it directly to the appropriate authority.

Hi, I have received an installment payment for our basement. The contractor charges me €2.5 per kg of steel including delivery and installation. The offer is from May/June with a price adjustment clause. Does anyone have current comparable values whether I should accept this or complain? Since the steel price (index) has fallen, I thought construction steel should have dropped considerably as well. Edit: Okay, just saw that the mats at the local building materials dealer currently cost €2.05 without delivery. I guess there isn’t much margin in that, right?

Reinforcement steel, right? Purchasing cost is about €1.20-1.35 per kg. Installation about €0.30-0.40 per kg. The rest will be margin and business expenses...