Old building with architectural planning from 2020 - cost estimate update

Approach 2 is not just renovation, but the package of 90 m² existing structure -> 50% demolition -> 81 m² (gross floor area) new construction. But based on 2020 cost data - and I have also seen email correspondence where the architect said things like "...renovation forgotten..." and "...prices no longer realistic..." (the latter would be reflected in my 1.5x factor... if that is realistic... if renovation is not included there and comes on top, you quickly reach >/=100k EUR additional... hmm).

So 81 sqm new construction? Somehow I don’t understand your post. At least from your T€ 202 you can either present 50 sqm new construction (then no renovation at all) or just renovate. But not both together.

Hello ,

sorry, I’m trying to sort out the numbers – the numbers in the architect’s plan are different from those in the exposé, I described them sometimes this way, sometimes that way – it’s difficult to keep track. To explain the current status, below is a g-maps excerpt. The plot + semi-detached house on offer is outlined in red. According to the agent, the other semi-detached house belongs to a third, independent party (owner-occupier).

The semi-detached house on offer has about 50% old structure (basement, ground floor, upper floor, + unusable attic) and is the lower part. In addition, there is the GDR extension (gray flat roof, at the top of the picture). According to the exposé, the existing area is 88 m² of living space (=ground floor GDR extension + ground floor old structure + upper floor old structure) and 37 m² of usable space (=basement old structure). The architect’s development plan foresees demolition of the GDR extension and an expansion to the left, which will be executed analogously to the other semi-detached house (current left outer wall as mirror axis).
So, more new space will be added than existing space remains/renovated. The more I think about it, the more I come to the conclusion that the architect really “forgot” the renovation costs – and one has to add the share to the 2024 new-build prices as well (which then results in approach 2 + renovation: 100k+ EUR?).

Regards
MrMunki

So more new area is added than existing remains/are renovated. The more I think about it, the more I come to the conclusion that the architect probably really "forgot" the renovation costs - and one must also add the share to the 2024 new building prices (which then results in approach 2 + renovation: 100k+ EUR?

And then approach 2 ==> directly becomes approach 1 or 3 again, at least as far as the costs are concerned. Just calculate with the T€ 400. The purchase price is roughly the land value minus demolition costs. And no matter how you turn and twist it, a 100 sqm house will then cost 400 +X all in. Whether with renovation + removing extension and new build, partial demolition + renovation + extension, or complete demolition and new build.

I think I once heard in the forum about a site where you can view old exposés?

Mapio spits out old listings. But for that, you need at least a district.

As a question from the sideline: What does the end user in the other half say about the plans?

Mapio spits out old ads. But you need at least a district for that.

Ad not found.

As a question from the sidelines: What does the owner-occupier in the other half say about the plans?

Layman's question: Does it (de jure) matter if the building permit has been granted? Objections, in my opinion, should have been made during the application review?

Practically, it is of course an important question, since a construction site at one's own semi-detached house certainly requires access to the other owner's part of the property one or more times (or at least is helpful, as there is only a narrow driveway on one's own property).

Practically, we will probably have to bury the idea; purchase price plus 400k+ EUR does not fit our financing framework – and when shrinking the project to our budget, the compromises become too big (possible areas too small, little/no buffer, "construction stress" without satisfactory "reward" at the end).

Thanks for your inputs!

Regards MrMunki