ᐅ Floor Plan Design for a Single-Family House with a Basement on a Sloped Site
Created on: 22 Mar 2025 13:41
5
57Christian
Hello everyone,
we are currently planning to build a single-family house with a basement on a sloped site and would appreciate your feedback.
Development plan / restrictions
Plot size: 517 sqm (approximately 5,567 sq ft)
Slope: yes
Site occupancy index: 0.3
Floor area ratio: 0.3
Number of parking spaces: 0/1
Number of floors: 1.5
Roof type: gable roof
Maximum heights / limits
Other requirements: roof pitch 28-45°. Knee wall height 75 cm (30 inches), defined slightly differently
Client requirements
Basement, floors: basement + ground floor + attic living space
Number of people, age: currently 3 people (2 adults + 1 child). Planning should include child #2.
Space requirements on ground and upper floors
Office: family use or home office?
Overnight guests per year: not relevant, occasional
Open or closed layout: rather open
Conservative or modern design: rather modern
Open kitchen, kitchen island: yes, kitchen island if possible
Number of dining seats
Fireplace: currently under discussion
Balcony, roof terrace: terrace facing south + terrace facing west planned
Garage, carport: 1 garage, with space next to it for carport / garage (optional, future)
House design
Who designed it: general contractor from the area
What do you like especially? Why? Open living area. All requirements accommodated. Option for a second garage.
What don’t you like? Why? Currently considering removing the second bathroom in the attic and instead adding a shower on the ground floor.
Price estimate according to architect/planner: 500,000 excluding land, additional costs, civil engineering, and landscaping.
Preferred heating technology: heat pump
If you have to give up something, which details / extensions
- can you give up: separate bathroom for the children in the attic
- can’t you give up: open living area, large bathroom upstairs
Why is the design like this? It is the first design from the contractor. Other plans were partly similar.
we are currently planning to build a single-family house with a basement on a sloped site and would appreciate your feedback.
Development plan / restrictions
Plot size: 517 sqm (approximately 5,567 sq ft)
Slope: yes
Site occupancy index: 0.3
Floor area ratio: 0.3
Number of parking spaces: 0/1
Number of floors: 1.5
Roof type: gable roof
Maximum heights / limits
Other requirements: roof pitch 28-45°. Knee wall height 75 cm (30 inches), defined slightly differently
Client requirements
Basement, floors: basement + ground floor + attic living space
Number of people, age: currently 3 people (2 adults + 1 child). Planning should include child #2.
Space requirements on ground and upper floors
Office: family use or home office?
Overnight guests per year: not relevant, occasional
Open or closed layout: rather open
Conservative or modern design: rather modern
Open kitchen, kitchen island: yes, kitchen island if possible
Number of dining seats
Fireplace: currently under discussion
Balcony, roof terrace: terrace facing south + terrace facing west planned
Garage, carport: 1 garage, with space next to it for carport / garage (optional, future)
House design
Who designed it: general contractor from the area
What do you like especially? Why? Open living area. All requirements accommodated. Option for a second garage.
What don’t you like? Why? Currently considering removing the second bathroom in the attic and instead adding a shower on the ground floor.
Price estimate according to architect/planner: 500,000 excluding land, additional costs, civil engineering, and landscaping.
Preferred heating technology: heat pump
If you have to give up something, which details / extensions
- can you give up: separate bathroom for the children in the attic
- can’t you give up: open living area, large bathroom upstairs
Why is the design like this? It is the first design from the contractor. Other plans were partly similar.
5
57Christian23 Mar 2025 14:04This does not apply to garages, carports, or parking spaces. These are allowed on the property boundary. In NRW, the distance is 9 meters (30 feet). Yes, exactly. However, if the garage is in the basement or there is a terrace on top, this rule, as far as I know, no longer applies.
But not the children coming home from school. They would not open a garage door. This only applies to the person coming home by car; everyone else needs an entrance door that is as visible as possible. Yes, we definitely need to reconsider that thoroughly.
With basement? Yes. Everything is very similar.
5
57Christian23 Mar 2025 14:17A part of the legend in the zoning plan was still missing
57Christian schrieb:
The development plan specifies WA + I + o This means "general residential area," "single-storey," and "open building structure" (i.e., no continuous perimeter block development). Here, I would expect a more detailed definition of single-storey, including terms like TH T and TH B (eaves height valley and eaves height hill), to regulate houses situated below or above the street differently.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
57Christian schrieb:
The main terrace faces south, so it's at the back of the house. So, one of us is still having trouble understanding the elevations. If you want the terrace behind the house and an additional one on the garage, which terrace door would you use to access the rear terrace? From the upper floor? Or do you plan to dig away the hill behind the house and sit in a huge hole?
I sketched this out:
Assuming you place the garage in the basement and set the elevation to street level, the basement would be completely embedded in the hill. Above that, the ground floor, which would still be buried by more than half. A terrace at the back would then more likely be accessible from the upper floor. (Note! These are just sketches to give an idea of the slope.)
Of course, the driveway doesn’t necessarily have to be at street level. Some height is possible with the car, but we’re talking centimeters rather than meters. (Maybe one of the car experts knows the maximum slope a car can climb without scraping the bottom?)
Please correct me if I’m misreading the slope. I see about a 7m (23 feet) height difference across the property. @hanghaus2023 Could you take a look? You have experience interpreting slopes.
How have the neighbors built their houses? Do they also have two terraces behind and beside the house?
5
57Christian23 Mar 2025 17:53The ground floor is planned with a height of 372.75. See the drawing on the first page. This should allow for a maximum extension of 2 or 3 m (7 to 10 feet) towards the back. This needs to be taken into account accordingly.
From the street, we have a slope of just under 20%. This is ultimately a compromise.
From the street, we have a slope of just under 20%. This is ultimately a compromise.
K a t j a schrieb:
Please correct me if I’m reading the slope wrong. I see a height difference of 7m (23 feet) across the property. I don’t see the situation any more optimistically here either.
57Christian schrieb:
We have a gradient of just under 20% from the street. More likely 20 degrees rather than 20%. About a two-meter (6.5 feet) rise over five and a half meters (18 feet), roughly in the same range as @Anson Argyris / @Ventreri.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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