. Thus the neighbor now has a sewer pipeline right on our property
Hello Listhom
to make sure nothing happens to the sewage pipes during the garage construction, a little tip:
get 30 x 30 cm paving slabs. On the right and left of the sewage pipe, set the paving slabs, similar to curbstones, in concrete. Along the entire length of the pipe. Then fill sand into the structure. Paving slabs on top. Done. Nothing will ever happen to it again.
That's how I protected all my KG pipes. It's a bit of work, but the weather is good and there's nowhere to go anyway.
Steven