When is it worthwhile to demolish an old building for a new construction?

  • Erstellt am 2024-06-04 14:07:22

cp03525

2024-06-04 14:07:22
  • #1
I have a small house (80m²) without a basement, the building fabric is not particularly good. It was built in the 1950s and there are no construction documents whatsoever. It also appears that there is no concrete slab; whether it has a strip foundation, I cannot determine. It has thinner walls than the standard and due to the missing foundation and small rooms (two floors of 40m² each), the ground floor is also prone to mold/moisture. The land value, according to the standard land value, is €77,000. Now I am wondering whether demolition and new construction is economical or if it is better to leave it as it is.
 

nordanney

2024-06-04 14:43:00
  • #2
What could you build new there? What would a renovation cost? Is 80sqm enough? What are your requirements? Etc. The answer to your question can be both yes or no. Whereas a major renovation is often just as expensive as a new build. But the old building still carries the problems of the old building, such as ceiling height or room layouts that could not be changed.
 

cp03525

2024-06-04 14:58:07
  • #3
In principle, it is okay, except for the susceptibility to mold. By the way, it only has a flat roof with tar sheets. However, the heating system would need to be replaced soon, and considering the low building value and potential future problems, I wonder if a complete new build of better quality would not be more economical in the long run. The new heating system, for example, could cost 20% of the estimated building value.
 

Rübe1

2024-06-04 16:29:31
  • #4
Well, let's look at it the other way around: You do a complete renovation, so what remains? In the best case, just the shell with all the mentioned problems (unless it falls apart during demolition). One has to be honest: 70 years old, there can't be much good left. Life expectancy fulfilled.
 

haydee

2024-06-05 08:30:20
  • #5
Other question
- Do you live in the house yourself or do you want to live in it?
- Do you like the floor plan?
- Is the size right?
- Is your heart attached to the house so that you absolutely want to keep it?

I quote my grandpa: "Kid, tear it down. No matter how much money you put into it, it remains an old house. I should have torn it down already."
We demolished it even though the demolition costs exceeded the land value.
a) the old unsellable house was still there
b) the house was old, the floor plan didn't fit, energetically we don't even need to talk about it, half-timbered with 5 cm of Styrofoam
c) the position on the property was fertile
d) we don't need barn, stables, and garages on that scale. Definitely not a slurry pit and manure heap.

During demolition we discovered dry rot even though it looked good from the outside. Old fire damage in the ceiling.
etc.

Whether it was the cheapest solution at first - no idea. Ultimately, only a shell with defects would have remained.
We now have a passive house for perhaps a bit more investment, with a floor plan we like, in the position on the property we wanted. Which means that according to heavy rain management we are suddenly safe.
 

ypg

2024-06-06 00:24:09
  • #6
… that will remain in the room.
 

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