Hello everyone,
I am interested in whether it is possible to make general statements about costs in relation to the following cases:
1. Fully basemented vs. half basemented
2. A full upper floor vs. an upper floor that is only half the area of the ground floor
Please assume the same basic conditions in all cases, and an average single-family house with typical factors (location, soil, wall construction, etc.). I understand that many factors influence the exact costs, so I am not looking for precise figures. A rough estimate would already help, for example if it can be said:
“Half basemented costs about half as much as fully basemented.” Or is it more likely that the difference is not that significant because some costs are fixed and then spread over a larger basement area when fully basemented? So maybe it is more like: half basemented: 20,000 EUR, fully basemented: 30,000 EUR?
I would be interested in the same calculation for the upper floor. Is there a noticeable saving if, for example, in a Bauhaus style with a flat roof, you have a 100m² (1,076 sq ft) cube as the ground floor and place a 50m² (538 sq ft) cube as the upper floor on top? Compared to a 100m² (1,076 sq ft) ground floor with a 100m² (1,076 sq ft) upper floor?
Many thanks
I am interested in whether it is possible to make general statements about costs in relation to the following cases:
1. Fully basemented vs. half basemented
2. A full upper floor vs. an upper floor that is only half the area of the ground floor
Please assume the same basic conditions in all cases, and an average single-family house with typical factors (location, soil, wall construction, etc.). I understand that many factors influence the exact costs, so I am not looking for precise figures. A rough estimate would already help, for example if it can be said:
“Half basemented costs about half as much as fully basemented.” Or is it more likely that the difference is not that significant because some costs are fixed and then spread over a larger basement area when fully basemented? So maybe it is more like: half basemented: 20,000 EUR, fully basemented: 30,000 EUR?
I would be interested in the same calculation for the upper floor. Is there a noticeable saving if, for example, in a Bauhaus style with a flat roof, you have a 100m² (1,076 sq ft) cube as the ground floor and place a 50m² (538 sq ft) cube as the upper floor on top? Compared to a 100m² (1,076 sq ft) ground floor with a 100m² (1,076 sq ft) upper floor?
Many thanks
Could you elaborate on that a bit?
I would need to calculate it in the contract, but do you consider excavators, concrete, insulation boards against soil, and basement windows to be more expensive than sand-lime brick, insulation against outside air, facing bricks with cornices, and nicer as well as larger windows (with windowsills, etc.)?
The number of ceilings and the insulation below remain unchanged...
I would need to calculate it in the contract, but do you consider excavators, concrete, insulation boards against soil, and basement windows to be more expensive than sand-lime brick, insulation against outside air, facing bricks with cornices, and nicer as well as larger windows (with windowsills, etc.)?
The number of ceilings and the insulation below remain unchanged...
B
Bauexperte27 May 2015 12:39Hello,
There are still providers who offer a basement for under 10,000 euros. Maybe you would like to share what your basement costs on paper?
If, according to the development plan, you are allowed to build two stories, then upgrading from an assumed knee wall of 1.20 m (4 feet) in a single-story building to a full upper floor is always more cost-effective than constructing a full cellar. The necessary area is already available and does not need to be created as with a basement. Additionally, extra earthworks come into play, and—if things get complicated—very high costs for a waterproof concrete shell (“white tank”) (more steel reinforcement, foundation earth conductor made of stainless steel, etc.). In my opinion, the most expensive part is likely the extra cost for more facing bricks.
Many landfills these days also require a chemical analysis before they are willing to accept excess soil. This report costs additional money, as it is different from the usual soil survey for safe foundation of a single-family house. Landfill costs depend on the soil analysis; but with a basement, there are quite a few truckloads involved.
Regards, Bauexperte
There are still providers who offer a basement for under 10,000 euros. Maybe you would like to share what your basement costs on paper?
Frank78 schrieb:If you skip a basement, don’t you save a floor slab, or am I misunderstanding what you are saying?
Can you elaborate a bit?
I would have to calculate that in the contract, but do you consider excavators, concrete, insulation boards against soil, and basement windows to be more expensive than sand-lime bricks, insulation against outside air, facing bricks with cornices, and nicer, larger windows (with window sills, etc.)?
The number of ceilings and the insulation underneath doesn’t change, right?
If, according to the development plan, you are allowed to build two stories, then upgrading from an assumed knee wall of 1.20 m (4 feet) in a single-story building to a full upper floor is always more cost-effective than constructing a full cellar. The necessary area is already available and does not need to be created as with a basement. Additionally, extra earthworks come into play, and—if things get complicated—very high costs for a waterproof concrete shell (“white tank”) (more steel reinforcement, foundation earth conductor made of stainless steel, etc.). In my opinion, the most expensive part is likely the extra cost for more facing bricks.
Many landfills these days also require a chemical analysis before they are willing to accept excess soil. This report costs additional money, as it is different from the usual soil survey for safe foundation of a single-family house. Landfill costs depend on the soil analysis; but with a basement, there are quite a few truckloads involved.
Regards, Bauexperte
I compared an additional cubic floor below the ground floor, mostly embedded in the ground, with one inserted between the ground floor and the upper floor. I believe the former is less expensive.
I sold our excess soil to the contractor for a few euros or offset it against additional services.
I sold our excess soil to the contractor for a few euros or offset it against additional services.
B
Bauexperte27 May 2015 20:33Good evening,
You are still mistaken; sorry.
Regards, Bauexperte
Frank78 schrieb:Usually, a basement doesn’t really care whether the structure above it is designed in a cubic, classical, or modern style.
I compared an additional cubic floor below the ground floor, mostly embedded in the ground, with one inserted between the ground floor and the upper floor. I think the first option is less expensive.
You are still mistaken; sorry.
Frank78 schrieb:Topsoil?
I sold our excess excavated soil to the contractor for a few euros or offset it against additional services.
Regards, Bauexperte
B
Bauexperte27 May 2015 20:36Frank78 schrieb:
Costs of the watertight (WU) basement in our case (11.8 x 10 m (39 x 33 ft)):
Completion of the base slab (payment stage 1): €10,000
Completion of the basement ceiling (payment stage 2): €25,000
Both amounts are net.What exactly is included in the "basement" offer?"WU" simply means watertight; this is nowadays standard for almost all commonly used concretes. However, it does not necessarily mean a "white tank" waterproofing system.
Regards, Bauexperte
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