Build a prefabricated house over an old existing basement?

  • Erstellt am 2017-05-07 23:02:14

BartJSimpson

2017-05-09 11:23:03
  • #1
: Thank you very much for your effort and your good suggestions. Unfortunately, the basement is only 8.58m deep. Multiplied by the width of the new prefabricated house (12.35m), this results in a floor area of 105.96 sqm. In comparison, the prefabricated house actually has the following dimensions: 12.35m x 9.10m + 4.61m x 1.20m = 117.92 sqm and thus already 12 sqm more floor space. But I can ask the prefabricated house provider whether the house can also be wider. Maybe it is possible to omit the basement windows on the street side at the front and thus gain additional square meters with an extra foundation. Has anyone here actually had experience with how flexible floor plans can be changed in prefabricated houses and what additional costs this might roughly imply?
 

11ant

2017-05-09 13:07:32
  • #2
Prefabricated houses today are no longer like in the time of the predecessor building, where the basement had to be adapted to the house, and everything inside could only be changed in grid steps (usually five-eighth meter increments). Instead, they can now be changed centimeter by centimeter. Individual plans are nowadays the third most common, in second place are standard designs with minor changes, and in first place are standard designs with changes in width and depth, roof pitch, room assignments, staircase position, and interior wall layouts. The unchanged standard design is last.

Costs depend on the provider. Low-cost providers - which Gussek Haus is not - like to calculate tempting base prices and hefty surcharges.

However, the effort of a redesign would have to require changing more than four pages to compensate for the "gifted" basement.

I see actual and target conditions coming together much more easily than you. Just routine.

Extension in one dimension is a very minor effort.

I do not share your fears of a reduction in room size; one would have to take out more than just appendices from the floor plan, and much can also be compensated in one dimension.

As I said: just post the plot and the zoning plan excerpt, then one can see more precisely.

Just for fun: which manufacturer built the existing house? - show some exterior shots of it.
 

BartJSimpson

2017-05-09 23:39:22
  • #3
I have now also tried a version with new foundations on two sides. Hopefully, something like this will still be accepted by the prefab house provider. However, the roof pitch would probably have to be adjusted significantly because the part of the house to the left of the bay window now has a depth of 9.80m instead of 9.10m.
 

11ant

2017-05-10 01:14:19
  • #4


The deviation from my proposal is that the notch at the bottom left of the plan is bridged over, which brings changes regarding the laundry cellar and the tank cellar and their light shafts.

If you want to do it that way, I would tear down both their front walls and extend the foundation continuously here; and then only keep the cellar wall on the left side of the plan and "attach" it on the outside.

The deviation from the original floor plan of the "Kiefernallee/V1" is smaller in your variant.



You will be surprised how little trouble these changes will cause the manufacturer. To vary their basic types is their daily bread.

You come and think you want something difficult, but in reality they already have that in the drawer. After all, this is not a rarely requested basic model – it or something similar has already been changed for someone else before.



That may be (and wouldn't be a big problem), but in the course of the attic redesign it might also "work itself out." Adjusting it significantly rather not. That can probably be smoothed out just at the knee wall. We will see as the redesign progresses.
 

BartJSimpson

2017-05-10 22:43:39
  • #5
Here is a new variant with the bathroom shifted to "save" the stairs to the basement. With a proper iron door towards the basement, a thermal separation should still be possible, right?

The utility room is omitted, but there is plenty of space in the basement anyway. The washing machine + dryer still shown on the ground floor will probably end up in the basement as well.

There is still a lot of space to the left and to the back of the plot. So the floor plan could still be varied in these two directions. To the right, however, there is no more space; the correct distance to the neighboring plot (about 3 m; I still have to check this exactly) is just barely maintained.

By the way, the old prefab house comes from Gebrüder Steger AG. However, it seems it no longer exists; nothing can be found on the internet anymore.
 

11ant

2017-05-11 00:47:08
  • #6
Whether the dryer ends up in the basement naturally depends on the in-house drop. Carrying laundry around the house will not be enjoyable.



As I said, try entering the property, including the development plan. Space on the property and space within the building window do not have to be the same. Are there actually any outbuildings (garage) on the existing property (and in the plan)?



Never heard of them actually. Where were they supposed to be from? Even among the deleted companies, I can’t find them registered (?) – but it’s not that important anyway.
 

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