Time delay due to plumber. What can I do?

Hello,

we are building a single-family house with a developer; we specifically chose a developer so that we wouldn’t have to organize so much ourselves. When selecting the craftsmen for the individual trades, we named the developer who and which ones he would take on. In particular, the plumber, who is also responsible for the heat pump and underfloor heating, was selected and commissioned by the developer.

Construction began for us at the end of August. Before Christmas, the roof was on and the wet plastering work inside the house was finished.
Then there was a pause of 3.5 weeks, which is understandable because of Christmas, everyone has time off then.

Now our problem.

Since the plumber has been on site, he has only done things half-heartedly. Before the plastering work, he did not manage to lay all the water pipes under plaster. The foreman’s statement was that we would open it up again later. (At first, not my problem, I thought because I have a fixed price.) Now the plumber is there and is laying the remaining water pipes and the ventilation system; unfortunately, he has been doing this for over 2 weeks, and this is my problem.

Either only one technician comes and works, or no one comes at all! And then there is a 2-day construction stop again.

When I ask the boss of the plumbing company, he always says his guys are sick, he doesn’t know how he will manage it, etc. Apparently, they do all of the developer’s constructions as a reference. And then he tells me our construction is already so far along that it isn’t so bad. (Normally, the construction manager would take care of this, but he doesn’t.) Unfortunately, we did not agree on any schedule or completion date for the construction because the developer comes from the neighboring town, and you always want to believe in the best. (I know, someone will probably say it’s our own fault, but that doesn’t help me now.) I cannot get an appointment with my construction manager on site (he doesn’t even answer his phone) to clarify the matter, and when the construction manager does give dates over the phone, they are wrong anyway. (Unfortunately, I’ve already been through all this; so far, I’ve had to call after every trade to check if the dates are correct.)

Can someone give me a tip on how I can proceed? Or what I can do? I don’t want to threaten with a lawyer.

Without written fixed dates, you have bad odds. Why didn’t you at least agree on a completion date? Even if nothing else happens in the next six months, you can’t do anything. So keep "bothering" the craftsman until he has delivered his service ;)

As you understand it, you are not the builder at all. You are buying a finished house - do you have any rights there?

So, as one understands it, you are not the builder. You are buying a finished house - do you have any rights then?

We are building
Excerpts from the construction description "TURNKEY":

We build Extracts from the construction description "TURNKEY":

Well then :) ... Then it is not a property developer, but a general contractor (GU/GÜ), so incorrectly posted in your opening sentence. That makes THE difference and I refer to nordanney's answer :)

Who is the contracting party? The plumber or the house company. Maybe they can put more pressure on. But when it comes to illness, probably no one can do anything... and since you have no guarantees, you just have to take it as it comes.