Site planning on a gentle slope with filling

I don’t understand one thing here. Why didn’t they just build a basement and a ground floor on such a steeply sloping plot (not easy as suggested in the title). On average, that would have been much cheaper for you than all this filling up now. Admittedly, a bungalow with a basement doesn’t look very impressive, but the basement rooms on the slope side would have been your utility/housekeeping room, and the terrace on the south side, with the bedrooms on the ground floor.

I don’t understand one thing here. Why didn’t they just build a basement and a ground floor on such a steeply sloped plot (not as easy as suggested in the title). That would have been much cheaper on average for you than this whole filling up. Admittedly, a bungalow with a basement doesn’t look as impressive, but the basement rooms on the slope side would have been your technical/utility room, and then to the south side the terrace and on the ground floor the bedrooms.

Because 5.5% is really only a slight slope. You can easily manage that with hardly any terrain modeling. See my suggestion in post #24.

Well. I would have built on the property. And set the house or rather the ground floor with the bedrooms 1m higher and created a nice living area in the basement with a level terrace facing the garden. But everyone as they think.

I didn’t mean just a gutter, that quickly gets overloaded or clogged with dirt during heavy rain. I meant a proper cross slope. Our house is also below street level and neighboring plots are higher. The plan is to really lead the water around the house if necessary. A gutter will still be placed in front of the door as a precaution, but actually everything is planned so that it would work without the gutter.

The client just pointed out that the neighbors, whose front door is also slightly below street level, had to divert the water coming from the cross street around the house with sandbags during heavy rain. Exactly this "flow" would also affect us.

If you make the garage driveway with the terrain slope (5.5%), you can build the house and garage about 75 cm lower. That makes the exterior landscaping significantly easier. Please keep in mind that the exterior landscaping is roughly completed first. Because you can’t get a digger around the house afterwards.

Why did you black out the heights at the boundary?

Lowering the carport would still be possible, but I wouldn’t risk the whole house because of the neighbors’ sandbag problem. Due to the street slope, the flow that the neighbors repelled during the last heavy rain would pass by us next time; then I’d like to be a few centimeters above the street :D. But yes, the terrain must be shaped before construction begins. I blacked out the heights for clarity; in the attachment you can find the current heights again.

Well. I would have built with the property. And raised the house or rather the ground floor with the bedrooms 1 meter higher and made a nice living area with a level terrace to the garden in the basement. But everyone to their own taste.

Same problem, the basement would be too low because of water coming from above. The neighbors have a basement entrance from the garden side, but there are steps down there ... and water collects there. Otherwise, a bungalow with basement would have been an option.

I would have also built more with the slope. The OP decided against it. Although much is to be done by oneself, and with a slightly more skillful layout than in the proposal, it can become really pretty and even affordable. By the way, the plot is perfectly flat compared to our plot.

And the house or rather the ground floor with the bedrooms raised by 1m and in the basement I made myself a nice living area with a level terrace towards the garden. But everyone as they please.

It only doesn't work with the plot. You have (15m*5.5%=0.825 m height difference) in the area of the house. But for your idea you need 3m.