ᐅ Process of Building a Prefabricated House Including Land Brokerage

Hello everyone,

We are considering building a house while searching for a property to own. Unfortunately, there is a shortage of available land in the Mainz area. A well-known prefab house company (Bien-Zenker) offered us an interesting plot through a sales representative. As often seems to be the case, we would first have to sign a construction contract before being shown the property. Although there is a cancellation clause stating that if no plot is found within one year, the contract can be terminated, a specialist lawyer advised that this clause is too vague and that we should not sign.

I also don’t like this order of steps. We have already met with the representative and discussed our general ideas and budget, but I would prefer to sign the contract only after soil tests and other surveys are completed, so we can better estimate the costs beforehand.

Now to my question:

Is it now "normal" to sign a contract before even knowing what can be built? Has anyone had experience with adjusting the process order to suit their preferences?