Garage construction and height difference

Hello everyone,

we have a huge problem. I actually wanted to submit our building application in the next few days, but it’s uncertain. Because of the garage.
Problem:
Take a look at my excerpt from the site plan, it can serve for better understanding. As you can see, our garage is supposed to be built on the boundary. But the heights to the neighbor differ by about 10cm. In the area of the garage there is a height indication of 69.48m. Our architect said that this height would be sufficient and the garage can be well planned. Everything lower is going to be difficult. Yesterday we asked our surveyor to measure the corner points of the garage at the boundary as well, because these were missing on the plan. Now he has done that on the computer. Don’t ask me how. He somehow calculated a digital terrain model and these values came out. Terrible, I see the dream of a garage fading away.

Why:
1) If we set the garage at 69.40m it is significantly lower than the house. According to the current planning, the upper edge of the finished floor is 70.04m. That would be a difference of about 60cm!! That would almost be an underground garage.

2) Considering the other heights, almost the entire property would have to be excavated. This results in the neighbor on the right being significantly higher again and it must be supported over nearly the entire length. That will be extremely expensive.

3) Problems with the driveway: It is at a height of 69.67 or 69.70m. That would mean I drive down into the garage. With a heavy rain shower I would have a swimming pool. In winter, with rain and subzero temperatures, I wouldn’t be able to get out of the garage because of frozen ice on the ground. Also, it then slopes down on the property right away, the question is whether driving back up onto the property is possible at all if it slopes down immediately. The driveway (belongs to the city) goes a bit uphill. At the peak the car could bottom out. Removing the driveway? I don’t know if that is allowed.

4) Transition garage - house. One should be able to go from the garage into the house. There would probably be problems with the door to the house with about a 60cm difference.

5) Property design: How can one design the front yard if the garage drops off that much ;(

Can you help us? This is so terrible...

Are there any possibilities to still save the garage? Or maybe an alternative? Lower the house a bit? The ridge height [OKF] at 69.70m? Then you wouldn’t have to compensate the 10cm to the right neighbor, would you?

Everything is sh..ty
The trouble already now... Great

Thanks a lot for your help.

The countries have geographic information systems. They contain so much terrain data that the surveyor does not have to go out again every time. This is not rocket science.

I still have not understood how a 10 cm height difference in the lateral direction to the neighbor can grow into a 60 cm lowering of your garage?

If I interpret the sparse excerpt correctly, the neighbor has integrated their garage and therefore does not have to observe a separate height restriction for it?

My thought would probably have been to do the same, that is, to formally maintain the boundary distance (possibly by means of an uncovered parking space, or possibly also a carport with a fake gable still "used") and to integrate the primary garage into the house.

There is quite a cluster of trees on this property, you could soon build a wooden house.

Thank you for your answer. The approximately 60cm results from the fact that the garage basically has to be built at the height of the left neighbor (at the top in the site plan). That would be 69.40m. The architect currently planned the house with a finished floor level (OKF) of 70.04m. That makes about 60cm between the garage finished floor level and the house finished floor level. The neighbor on the right (at the bottom in the site plan, where the house is visible) has a carport. That is further back on the property. A garage inside the house is not an option for us. Besides, the house is already fully planned. And if you only considered the transverse direction, it probably wouldn't be such a big deal. Then you would probably just place the house at the height of the garage and level the ground accordingly. But the problem here is that the driveway or property boundary has a height of approximately 69.70m. That would mean that to access the property, we would have to drive downward and during rain, we would have all the water in the house or the garage. No matter how I turn and twist it, I can't find a good solution. Because either water flows into the garage from the front when it rains or from the back. Or I have to drive down from the driveway. There has to be some solution, right? P.S. The situation with the trees looks worse than it actually is. You can come cut them down. You can keep the wood too :P

I see the highest point as the corner of the house at the back right (69.76) and the lowest point as the property corner at the front left (69.31). That makes a height difference of 45 cm. On the other hand, between the garden fence edges with 69.48 to 69.49 there is only a 1 cm height difference over 20 m, so almost flat compared to diagonally viewed (and otherwise, as the height points are distributed) bumpy / stubble field.

Where one would take a height reference point from there is beyond me. Maybe understanding comes into play if you post a section of the planned garage (and photos of the property) (?)

At 3 m garage height I still see 30 cm leeway for an unfavorably located height reference point, without being forced to a special height (and certainly not yet for sports cars).

I had to read your post dozens of times to understand or find the values 69.49. You interpreted it incorrectly. The "thick" 69.48 and 69.49 are the lengths of the property on the sides. NOT height indications. I also don’t know how else to explain it to you. We just don’t understand each other. I can try again slowly: 1) House planned according to the architect at 70.04m. That is, the top edge of the finished floor at 70.04m. 2) Since the lowest point on the left side of the property is 69.40m, the garage has to be placed there or should be, since you are only allowed 3m in height. 3) Between the top edge of the house and the top edge of the garage (at 69.40m) there is now about a 60cm difference. Do you understand it now I am now looking for a solution for how the house and garage can best be built without such large height differences. However, the driveway at 69.70m must always be taken into account, because I don’t want to drive "down" into the property. And also to avoid problems with rainwater. Maybe during the paving of the driveway the driveway outside the property can be lowered from 69.70m to 69.60m, but that has to be clarified with the city again, since that is no longer my property. Difficult

How would you place the garage? Please make a suggestion, including where you have the 30cm leeway. Maybe I have a mistake in my thinking somewhere. I don't have any plans of the garage yet. Only the information I have already provided here.