We are looking for a house construction company in Hamburg

Since we can only have the house appraised next year,

At least you should already know the essentials, e.g. about the building area and have an opinion on whether the existing basement and the new house would fit together. What does the development plan say, etc.

At least you should know the essentials, for example about the building envelope and have an opinion on whether the existing cellar and the new house would match each other. What does the development plan say, etc.

The house itself is pretty cool. I like it and the room layout etc. fit so far. However, there are 2 major points of criticism, one might possibly be solved somehow, the other not. 1. The stairs are a horror! They are very narrow and very, very steep. I don’t want to see children walk down them and in old age it will probably be a torture as well. 2. The house stands very far away from the street, so that we can hardly use the back part of the garden. The development plan says it is corona time and I come whenever I want. Our inquiry has been running for 2 months and everyone refers to someone else and then that person was sick and she misplaced it and anyway the development plan could be infected too, therefore 1 month quarantine. This also showed us that we should be prepared no matter which direction things go.

Then you shouldn't build at all, but rather stay with the existing structure and renovate. What you leave behind in construction you won't get back with any system... You have to do the math. Saying flat rate that 40+ or something else costs extra, which can be saved, is not enough.

You are right, but in my earlier response there is unfortunately a reason and we don't even know the actual condition of the house. It is all basically self-built. We just want to be prepared and have plan A, B, and preferably C in reserve.

Unfortunately, it's not that simple. It already starts with the fact that the requirements for the basement rooms in my opinion must also meet the current energy saving regulation requirements. So if you build kfw 40, the basement must accordingly also be built to that standard. If you only use them as utility rooms, I'm not quite sure right now.

A utility basement would be absolutely sufficient. The question would then be whether that is even possible within the budget if it is allowed. The house also does not have to be fully basemented.

The development plan says it's Corona time and I come whenever I want. Our request has been running for 2 months and everyone refers to someone else and then that person was sick and she misplaced it and anyway the development plan could also be infected, therefore 1 month quarantine.

Corona is definitely not transferable via PDF, you've been led up the garden path.

The house also doesn't have to be fully basemented.

But it should be as close as possible to the desired ground floor level - even if Yvonne loves split level.