ᐅ Home Building Project – Basement, Ground Floor Layout – Tips

Created on: 29 Mar 2018 00:03
R
red-ed
Hello everyone,

After a long search, we have finally found a plot of land that we want (and can afford). Now the question is how to build.

To explain briefly, it is a slight slope parallel to the street. In front of the plot, there are two parking spaces, so the driveway can only be on the upper left side.

A soil report states that the soil is clayey. Building is allowed at 200 meters (656 feet) above sea level ± 0.50 meters (1.6 feet). The total height for shed roofs must not exceed 7.50 meters (25 feet). The shed roof must have a pitch between 10° and 15°, the orientation does not matter (preferably facing south due to a planned photovoltaic system). We would like to build two full stories.

The construction will be solid masonry, but we are still undecided between aerated concrete, clay blocks, or Neopor concrete.

Now the question is whether it makes sense to plan a basement, which would only be used as storage and for the building’s technical equipment. Possibly, depending on the size, also for a hobby room.

On the topic of basements, you find very different cost estimates ranging from €15,000 to €70,000. Since the basement will be finished by ourselves, I am mainly interested in the cost of the basement shell itself, not the complete finish.

Is a basement even possible with the maximum building height and two full stories?

What are the additional costs compared to building without a basement? Because of the slight slope, quite a bit of excavation would be required to create the foundation for the slab.

To give you a rough idea of our plans, I have attached two images.
The red numbers indicate the elevation in meters above sea level at the corners.

Plot layout plan: red rectangular design with driveway, street, and measurements

Floor plan of a single-family house with double garage, kitchen, living room, dining room, office, and balcony.


What do you think about the basement? We find it hard to design a floor plan where there is enough space on the ground floor for both the technical and storage rooms. But we also don’t want to “bury” unnecessary money.

PS: I’m happy to receive suggestions for the floor plan as well, but the main focus should be on the basement question.
Y
ypg
26 Dec 2018 16:51
Fine. Except for child 2, is the room really meant for a child?
R
red-ed
26 Dec 2018 17:19
ypg schrieb:
Fine. Except for child 2, is the room really meant for a child?

No, it is actually intended as a guest/media/playroom. Possibly also as an occasional home office.
K
KEVST
26 Dec 2018 19:59
Interesting design.

I have two questions:
Where do the wastewater pipes from the bathroom and utility room run in your building?
How do you get approval for a garage longer than 9m (30 feet)?
R
red-ed
26 Dec 2018 21:13
KEVST schrieb:
Interesting design.

I have two questions:
Where do the wastewater pipes run for the bathroom and utility room in your plans?
How do you get approval for a garage over 9m (30 feet) long?

The wastewater pipes are shown in the basement. But to put it simply, the pipes run along the exterior walls and inside the wall where the toilet is located on the ground floor.

In short, we received a special permit from the neighbors. However, the building permit could still be revoked, as the city might have objections. Although this is reportedly rare when the neighbors have already agreed.

Best regards,
Red-Ed
D
Domski
26 Dec 2018 22:39
Please do not mix radiators and underfloor heating, especially not with an air-to-water heat pump (AWHP).

That will cause problems and increase costs.
R
red-ed
26 Dec 2018 22:56
Domski schrieb:
Please do not mix radiators and underfloor heating, especially not with an air-to-water heat pump.

That will cause problems and be costly.

Oh, could you please explain that in more detail?
Actually, there are no rooms in the basement that really need heating, except the "hobby room." Underfloor heating might be too slow for the occasional and infrequent use.

What would you recommend?

Regards