Access to the planned single-family house on a rear plot

While the access road was undisputedly sufficiently wide until the border survey, the new survey showed a change of about 30 cm to our disadvantage on the access side.

Unfortunately, this phenomenon is not the only thing about which your illustrative attempts do "not enlighten" me ;-)

There are access routes here in Berlin as pedestrian paths or driveways. Not everyone can drive their car directly to their front door. Trucking companies know this, and as a rule, it applies to the curbside. (...)

There are many things. In Berlin and other cities, there are also backyard apartments. But just because others do it poorly doesn't mean you have to imitate it.

For your own sake, you shouldn't have an access route 2.7 meters wide and 30 meters long. Sure, with practice you can get in and out again. But in an emergency, the fire department will need 5 minutes longer because they first have to lay hoses 30 meters. And the ambulance probably too, because it can't drive in.

Not to mention the disaster of having to carry any delivery by truck 30, 40 meters to the house.

Even if you do it that way. You really can't seriously recommend that to anyone?

3m is already sufficient. Trucks are a maximum of 2.55 wide.

There are many things. In Berlin and other cities, there are also backyard apartments. But just because others do it poorly, you don't have to imitate it.

Out of your own interest, you shouldn't have a 2.7m wide and 30m long driveway. Sure, with practice you can get in and out again. But the fire department will take 5 minutes too long in an emergency because they first have to lay hoses for 30m. And the ambulance likewise, because it won't drive in.

Not to mention the disaster of having to carry any delivery by truck 30 or 40m to the house.

Even if you do it that way. You really can't seriously recommend that to anyone?

Ambulances are usually Mercedes Sprinters, which easily get through with their 2 m width. And the drivers are capable of that too.

And truck drivers can do that as well, fire truck drivers even more so. 10 cm of space on both sides is comfortable; they often have passages where they have to fold in the mirrors.

If the delivery is, as often, only curbside, you have to carry it behind anyway. If not, the driver can manage that too.

So the trucks from Bau-King, Hornbach, Bauhaus, etc. definitely do not go in there. That is also stated in their delivery conditions. Everyone can do whatever they want. But I wouldn't knowingly create such a bottleneck. 2.7m width... that gets difficult even at an older age when you can't look properly backwards anymore. You don't stay 35 forever... And as was already said. That quickly becomes 2.5m in reality, unless you trim the hedge every 2 months...

Usually, MB Sprinters act as ambulances; with their 2 m width, they can easily get through. And the drivers are capable of that.

Modern ambulances are rather 2.2 m wide.

And truck drivers can do that, firefighters even more so. 10 cm of space on both sides is comfortable; they often have passages where they have to fold in the mirrors.

The fire department in Germany consists of almost 95% volunteers. So if the building is not in a large city, the likelihood of having an experienced operator at the wheel is very low. Nobody will measure with a tape measure to check if it fits. In case of doubt, they simply won’t drive in.

If the delivery is often only free curbside, you have to carry it behind anyway. If not, the driver can manage that too.

The driver will certainly not risk damaging his vehicle. In case of doubt, the customer is out of luck and has to figure out how to get the goods up the driveway themselves.