Wait, please put the statement into context. €640,000 already sounds expensive to me. Was that just your realization that it probably really costs that much, or do you suspect it could cost significantly more?
Well, yeah. Such a renovation is usually more expensive for such an old house than building new. Especially with historic preservation, the trades aren’t just off-the-shelf. You often have to expect an additional factor. However, I don’t know if there is still any funding or similar? I’m not familiar with that.
If I take your 230 sqm x €3000 standard value, we’re already at €690K. You can now deduct an amount for the shell construction and a bit for the roof structure. But you would have to calculate quite a bit of additional work for the heritage requirements, filling the basement, and disposal/demolition (e.g., windows, doors, old pipes, cables, etc.). Everything else must be new including various connections – simply everything. I estimate, in the end, you’ll land around €700K to €750K depending on the federal state, standards, requirements and without major own effort, also for the design of the outdoor facilities of 3000 sqm garden etc.
About 16m x 9m roughly. Why are the outside dimensions a factor?
To estimate the dimensions. The 230 sqm is only ground and upper floor, right? The roof structure is not included if I roughly calculate. 16x9x80% is exactly 230 sqm. But you would at least "clean up" the attic. That usually isn’t free either.
It’s a half-hipped roof.
That too. It’s nice but just more expensive than “normal.”
Animals were of course inside during the vacancy, but basically only raccoons or similar.
We got one condition: We’re supposed to restore bat shelters.
I actually meant woodworms in the roof structure. Anything like that known?
The bat thing is funny – that’s literally small critters that also make a mess.
Cleaning inside and outside
What do you mean by that? Do you have a mason in the family who can re-plaster the walls or do you mean just cleaning?