Architectural question regards a house extension

We are/were in the process of building a house - we have the land already - but have decided that because the husband has very limited time, that this is not the best option. it would only lead to more fights. so we have found a house which is amlost perfect. there is just only a small problem. we need 4 bedrooms and this house has three. we there would be a fourth bedroom is the galerie and 'luft raum' over the wintergarten. the windergarten is basically quadratic with a pult dach. so my< question is (before i ask anyone else and look like an ass) is it possible to remove the wintergarten and build and extension with lots of glass - another wintergarten basically but with 2 -4 pillars, copmplete the floor where the galerie and luft raum are, and add new walls and roof estension?

the present wintergarten is built onto the main walls of the house, so i dont think that taking it down would be a problem, but is it possible to add more floor to an existing floor?

and before you guys ask, hubby and i have talked a lot of things over. we are both keeping our fingers crossed.

attached are the house plans so you can see what i am talking about.

Why does the husband having limited time have anything to do with it all?

As for your question, yes it is possible (almost anything is possible). However, that doesn't mean that the building authorities will give you the permit to do that.

Thirdly, I am not sure how happy you will be with having much of your living space just under the roof. It is hell in the summer months without AC.

ok eurovol, lets leave the husband out of this for now. why do you think that we might not get planning permission?

Assuming it's a normally built german house with cinderblocks and stucco, there's no reason you can't. You'll possibly want to install a header where you'd be cutting the hole in the wall, but the installation of such a sunroom structure is really straightforward. You can install regular french doors between the new room and the rest of the home. You'll need to plum in a line for a radiator or some other heat source.

There are several companies in the UK that sell these add-on glass rooms as a kit and or as a full install. Just don't skimp on extending the foundation to have it match up properly and you're good to go.

dont quite understand your post lexicon. why would we have to extend the foundation. the keller extends to the full length of the wintergarten. anayway, now that i know that is is possible i will go talk to some people.

by the way how would they do that - joining a new floor to the existing floor?

Because this is Germany and that they have these rules you see and adding onto an existing structure is a pain in the butt!

1) Architect has to design it.
2) Gutachter has to approve it (this is the most important step!).
3) Then you have to apply for it.
4) Wait for a decision.

1-3 will cost you a pretty penny too.

thanks eurovol. i know one of the people from schworer haus. will have a talk with them. by do u think it will be so expensive as to make it unrealistic? i had to share a room with my sis growing up and i would not want to put my girls through that. then again...

Depends on how much money you have and how badly you want it. As usual, it's all relative. What's unrealistic to you might be just pocket change to someone else.

It ain't gonna be cheap. Depending on what all needs to be done, it will cost between 20 and 60k. Building out an existing room that only needs the roof raised costs about 10k and is much easier to get approved because it is going upwards and not outwards. For you, much will depend on how the winter garden room is actually listed, ie permanent or not.

Oh if your cellar is already underneath then you'll have no problems. As for extending a floor, depends on the floor. If you have a cellar underneath you may already have some sort of structure there. If you have wood in the other rooms that's pretty easy to match. This is germany, so instead of wood it's likely to be something made of plastic or composite or something...I have no clue how diff that would be.

eurovol is right about all the crap you'll have to go through to get it all approved though.

I hope it works out and solves all your problems.

no, but we do need to live somewhere!

I understand. Good luck.

Based on the floor plan you posted, I am kind of suspicious about your claim that the cellar goes all the way out from the foundation of the house to include the winter garden. Those extra thick lines are the supports for the house and they go all the way to the basement floor. The winter garden shows no such supports which tends to say that it is already on the "ground".

eurovol, heres the plan for the cellar. as you can see the cellar extends to under the wintergarten.

and the wintergarten in question

I don't know where you live, but in Unterschleissheim, there are many rules about what you can and cannot build. Each property has a predetermined house size (maximum possible size of the footprint). For example, in Riedmoos (the part of Unterschleissheim where I live), we have the plans for the whole street we live on. The lot next to us is allowed to build a house with a 90sqm footprint and the town is extremely strict - it will not allow 90.2 sqm. Plus the roof has to be at a certain angle, the roof tiles have to be a certain color, etc. My neighbors had to change several things before they were allowed to build on their lot.

So, Eurovol is correct that you should get a plan together and then get it approved.