ᐅ Structural Shell Contractor / Structural Shell Cost Estimation – How Do They Calculate?

One drawback in the plans is that rooms have been arranged without considering, for example, wastewater drainage. Bathrooms located above bedrooms, and so on.

Also, there are no visible service shafts.

In addition, I see 3-4 mandatory ventilation ducts, one of which goes straight through the roof terrace.

For instance, draining bathroom 11.07 is a nightmare. I find it very doubtful that the waste pipe can run from the toilet to the lowest point near the bathtub.

The wastewater pipe would then have to run through the corner above, passing through the study. However, there is no space left for the necessary boxing (duct casing). This means windows would need to be moved, and the furniture cannot remain as planned.

ivenh0 schrieb:
For us, all materials and measurements were precisely defined. This allowed us to perfectly compare the quotes because they followed a uniform format.

We only had one structural shell offer. We accepted it with a handshake and started building. Payments didn’t increase even if something unforeseen came up. The price was fair. It can work out well like that too.

Caspar2020 schrieb:
One drawback in the plans is that rooms were arranged without consideration of, for example, wastewater routing. Bathrooms located above bedrooms, etc.

Well, he already mentioned that.
The plans come from him, so no professional has reviewed them yet. For that, they’re almost good ^^
But seriously, in my opinion, it would be best to start again from scratch with the room program and building permit / planning permission process together with a professional.

For a layperson, the plans are really good; many architects provide much more superficial ones. It’s more about details that don’t fit and can lead to an adventure like “Hotzenplotz” – and the nightmare that the upper floor and attic are rotated by 180°... it can really give you a headache.

That said, a bill of quantities is a different matter altogether. So either carefully review and accept the general contractor’s offer or hire an architect for the tender documentation.

Hello everyone,

now that’s constructive feedback! Thank you very much! We will have an architect on board soon. Everything I can prepare in advance with a lot of effort will save costs later. Besides, planning is also fun.

So, I understand that drainage is a major challenge on a large construction site. Service shafts are now included. Attached is the new version as a PDF.

I will proceed in an organized way:

Question 1:
Can drainage actually work through the recessed attic level? I find it difficult to imagine. The pipe would have to bend twice before going down. Screenshot attached. The shaft is marked in green.

Best regards, Alex

the revised plans..