Is worry justified or not?

We also had this problem. When we recently came to our property, the neighbor to our right had stored his excavation on our land. We then had the real estate agent, who sells the plots in the new development area, establish contact with the neighbor because there was no construction site sign yet. Fortunately, everything was clarified very quickly. But I can really understand your concerns. Maybe you can ask the municipality to give your contact details to the neighbor.

Worries are unfounded. It is not yet your property. There has been no contact yet. It is unclear whether the “pile” was even placed at the behest of the client.

I would of course talk. But a) I don't have the gentleman's phone number. It's not on his construction site sign either. b) We can currently only access the property on weekends, but of course we never found him there then. c) We are just the people who reserved the property next to his. The owner is currently still the municipality. That's why I don't find it so unlikely to ask there.

It's not the neighbor making the piles, it's the construction company. Go there, talk. Directly with the craftsmen and send an email to the company. I wouldn't mention that the property (still) doesn't belong to you. It makes no difference. Borrowing adjacent storage space is not uncommon.

Builders don't think too much but take the easiest way. I had allowed my neighbor to leave his building materials for paving the driveway on my side of the property boundary because he had no space. I assumed it would be unloaded from the street, which would have been possible. But no, the 40-ton truck was standing in the middle of my garden to unload.

That is normal. You buy, it takes another month until it’s yours, then you make the building application, that takes another two months until it’s approved, then one or two months later the construction starts. So almost half a year where the pile can just sit there.

A wheel loader will also drive over it, and one, two, three trucks, and maybe a mobile crane will set up its supports or a container will stand there for three days. And maybe after the topping-out ceremony a carpenter will throw up on it.

And at some point you will also get an upset call from the neighbor, asking why you crippled his tree (and then find out that someone from your construction crew broke off a branch so the truck could get through).

@nägel: one of the smallest hazards on the construction site. By the way, for 20-30€ you can get puncture-proof boots with steel toes. For the big ones who are carrying the little ones in their arms.

You’re really going to let the purchase of the property fall through if the sand pile there isn’t cleared?