I urgently need your advice.

So first of all, thanks for so much participation, I will try to answer in order:

@nathi
I spoke with the architect again and of course the building permit states the height of the slab compared to the ground level, but she says it can be adjusted on site as long as it does not change by half a meter.

Ok, lawn same height as slab means that first 25 cm of lawn is removed and then 25 cm of gravel is added again.

@bieber0815

I can’t upload a sketch, I don’t have a PC here, only a smartphone. It was already a hassle to register here because the confirmation link in the mail didn’t work, so I did it at a friend’s place.

No corner of the house is below the ground surface, basically the terrace door as well as the entrance door float 60 cm above the ground and I have to add a lot of soil anyway and if then the slab is 30 cm higher I have to add almost a meter and that I don’t want.

Regarding 1:
Not possible, if I only take care of it afterwards, the house would be too high and I would have to bring in masses of soil.

Regarding 2:
Good idea, just remove a bit at the highest point of the property.

@eeepad

Save money? On the contrary, I want to set the slab deeper, so more earthworks.

Why no steps? Nobody here needs barrier-free access but you never know what might come and besides, I want to say I want to live “hurdle-free” out of convenience.
No basement under it.
It being dry is also important to me.
But looking at it another way, even if I wanted the top of the slab lower than the top of the surroundings, why shouldn’t it be possible? It just has to be sealed like a basement. With a basement it works too.

Compared to the next street curb, the top of the slab is about 80 cm higher as I want it and 110 cm higher as the developer wants it, so no problem in either case.

We are doing the earthworks ourselves, my best buddy is an excavator operator, he does it all for a crate of beer and of course I help him if he needs me.


Exactly.

As said uploading doesn’t work.

Exactly.



Yes, eaves height is specified but my architect says that is no problem, there are certain tolerances and it is fine if it changes depending on a slightly changed slab height or if you adjust the garden. There are also no problems if you build a house and a year later remove 50 cm of the entire garden even if the eaves height changes. Just as an example.

Regarding the rainwater issue, in my view there is hardly a problem because our entire property is sloped so no water stays at the house but runs off. The only place where it gets tight is the highest point of the property where I want the top of the slab to be at the level of the surroundings. From my side it could be even 5 cm higher to avoid problems at this point. Also, there are no doors or windows with fire resistance class close to zero in this area, so there will also be this splash water protection around the house with the decorative stones, so I also have a lawn edge (how do you write that?) where water runs off in case of really heavy rain.

In the area of the terrace and entrance door I wanted to slope it as you suggested, wheelchair accessible basically, but the higher the slab the steeper it gets, that is why I want the slab quite low.

Good morning,

Yes, the eaves height is specified but my architect says that is not a problem, there are certain tolerances there

I would be very surprised; in my area there is zero tolerance from the building authority if specified heights are exceeded. We had to lower by a full 2 cm on one of our last construction projects and that in a § 34 area! Don’t forget that in the end the surveyor has to come out again for the final measurement of the building.

besides it is okay if it changes depending on a slightly modified slab height or if you adjust the garden.

Why should you reduce the thickness of the base slab to your disadvantage? What does the structural engineer say about this proposal?

There are also no problems if you build a house and a year later lower the entire garden by 50 cm even if the eaves height changes as a result. Just as an example.

The eaves or ridge height to be observed has nothing to do with the ground level of your garden!?

Rhenish greetings

Good morning, I would be very surprised; in my area there is zero tolerance from the building authority if the specified heights are exceeded. We had to go down a whole 2 cm at one of our last construction projects and that in a § 34 area! Don’t forget that in the end the surveyor has to come out again for the final measurement of the ... Rhenish regards

Hello, many builders do not fully utilize the ridge, eaves, or overall height specified in the development plan. Then on site there are options to decide whether the house will be built slightly higher on the plot. That was the case with us. I don’t know if that is a matter for the federal states?! Of course the height of the garden does not matter, but rather the building height.

Hello Yvonne,

many builders do not fully utilize the ridge, eaves, or overall height specified in the development plan.

Ours don’t; sometimes it’s a matter of millimeters for our architects

I don’t know if that depends on the federal state?!

No.

Edit:

The heights must be adhered to in every federal state; I can’t imagine it being any different. Maybe it’s a matter of mentality if the final foundation height is only determined at the last minute. It’s also a matter of money

Rhenish regards

So once again in order:

@Bauexperte
I don't want to exceed the given heights, I want to stay below them

I don't want to reduce the thickness of the slab, I want to reduce the soil under the gravel beneath the slab. Which does not affect the statics.

If the eaves height has nothing to do with the ground level, I don't understand your original question... If I only reduce the dirt under the slab and the slab and the entire house thereby come lower, I am not changing anything about the eaves height.

,

For us there is still room regarding the eaves height or total height because we actually prefer the roof for aesthetic reasons to have a pitch of 19 degrees and have planned it accordingly but for the building application 22 degrees were specified and thus a higher eaves height.
The structural engineer was of course informed and said he will calculate it so that it is stable enough no matter what we ultimately decide.

So I am actually relatively sure that legally, statically and concerning rainwater everything is in the green.

What do you think now? Break your head against the wall and tell the construction company we'll set the slab lower or listen to the company and truck in tons of soil and make all the sloped areas unnecessarily steeper in my garden?

The eaves height depends on a fixed point in the terrain, e.g. a manhole cover on the street or similar, not on your house. I would choose the golden mean: you don't have to build a hill, but still make sure that the water can flow away from the house a little on the property. We also decided on the "lower" option. This led to all the builders around us skeptically eyeing our level, "You are way too low." No, we are not too low, but we are lower than others. We have not had any problems with the rain so far.