Hello everyone,
From the beginning, it was clear to us that we wanted a house with a basement so that rooms like the utility room or heating room could be located there, providing enough storage space and possibly allowing for a hobby basement or even a guest room.
Considering the additional space you get, the costs for a basement generally seem reasonable. I recently read about the alternative of a “raised basement,” meaning a basement that partially rises above ground level and thus allows for larger window areas. This is said to save costs due to less excavation.
Here in NRW, the basement is allowed to protrude 160 cm (63 inches) on average above ground without being considered a full floor—measured from the top edge of the ceiling. So, practically, it can stick out about 140 cm (55 inches) when taking the basement ceiling thickness into account. That should enable fairly large window areas.
Of course, I wonder if it really saves money or if the additional costs end up being higher. For example, you need stairs at the main entrance and also need to find a solution for the garden exit (stairs or raising the terrace). Certainly, more plaster is required for the basement part that rises above ground, as well as insulation for the basement and better basement windows. Am I forgetting anything? Has anyone calculated this in detail or has experience?
I also came across an interesting plot where the front edge of the house must be built directly on the sidewalk (central location). What could be a solution there? You probably aren’t allowed to place the entrance stairs on the sidewalk? Would an internal solution inside the house be possible? But that would affect all floors above.
I look forward to your insights and suggestions.
Best regards,
HB1
From the beginning, it was clear to us that we wanted a house with a basement so that rooms like the utility room or heating room could be located there, providing enough storage space and possibly allowing for a hobby basement or even a guest room.
Considering the additional space you get, the costs for a basement generally seem reasonable. I recently read about the alternative of a “raised basement,” meaning a basement that partially rises above ground level and thus allows for larger window areas. This is said to save costs due to less excavation.
Here in NRW, the basement is allowed to protrude 160 cm (63 inches) on average above ground without being considered a full floor—measured from the top edge of the ceiling. So, practically, it can stick out about 140 cm (55 inches) when taking the basement ceiling thickness into account. That should enable fairly large window areas.
Of course, I wonder if it really saves money or if the additional costs end up being higher. For example, you need stairs at the main entrance and also need to find a solution for the garden exit (stairs or raising the terrace). Certainly, more plaster is required for the basement part that rises above ground, as well as insulation for the basement and better basement windows. Am I forgetting anything? Has anyone calculated this in detail or has experience?
I also came across an interesting plot where the front edge of the house must be built directly on the sidewalk (central location). What could be a solution there? You probably aren’t allowed to place the entrance stairs on the sidewalk? Would an internal solution inside the house be possible? But that would affect all floors above.
I look forward to your insights and suggestions.
Best regards,
HB1
Hausbauer1 schrieb:
I haven’t been able to find a precise definition of the base course yet. So, where exactly is it measured from and to? It does not have a special shape; it simply refers to the finished height of the ground floor slab above a reference point. This reference point can be, for example, a manhole cover, the crown of the roadway in front of the center of the property’s street frontage, or the average elevation line where the building penetrates the ground surface (before any landscaping changes). Which of these applies is also stated in the regulatory text.
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Hausbauer119 Jun 2017 21:10It states, "The house base must not exceed the height of the paved development area by more than 50 cm (20 inches)." There is no further explanation. So, I'm not really sure from where to where I should measure.
The requirement for a second escape route is only necessary if I want to designate the basement rooms as living spaces, right?
The requirement for a second escape route is only necessary if I want to designate the basement rooms as living spaces, right?
Hausbauer1 schrieb:
The requirement for a second escape route only applies if I want to designate the basement rooms as living spaces, right?Exactly.
But it’s a double-edged sword.
It can be beneficial to declare less living area. Property taxes, insurance (building, contents, etc.)...
However, some banks may not like that because they might use a rough calculation to determine the home’s loan value. Usable space is valued less than living space. This can cause issues. For resale, 200m² (2,150 sq ft) of living area also looks better than 140m² (1,510 sq ft).
And you should keep in mind that these regulations aren’t arbitrary—they are there to save lives in emergencies.
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Hausbauer119 Jun 2017 23:48Due to the socle rule, this is probably not possible because of the window surfaces alone. Unless the socle is defined differently. But as I said, I still haven't found anything useful. It could be measured up to the basement ceiling, or up to the ground floor level, or it might simply refer to a separate element on the facade. You might get reliable information from the local authority.
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