Hello construction expert, thank you for the response. So far, we have not received any rough schedule. Sometimes we heard that, for example, the windows are supposed to be installed soon or similar. We regularly go to the construction site and take photos so that we know the progress of the construction. Regarding the special requests, we compared the offer and found that the prices were set too high (exterior roller shutters). Since we did not return the signed offer, no shutters were installed. Negotiations are impossible. Either we accept or everything is done as stated in the notarized contract. Since we did not accept an offer for 2 skylights, we are now supposed to pay for the modification if we still want them. Therefore, I asked the developer to inform us of the date of the door masonry because we did accept his offer at a certain point. But we generally do not receive such information. Cooperation is so difficult that we have already considered selling everything again.