Floor plan design for extension of 1970s bungalow - no additional storey desired

When I look at variants 2 and 3, I doubt the whole idea of an "extension." V 1 probably falls under that as well.
I really don’t like at all about V 0.0 that you first have to circle around entire nice-to-have little rooms to somehow get into the everyday living space.

The question I have is: how high is the budget? And to what extent is an extension that is stretched out so massively to the back still an extension that is legally permitted?

Then I read about a floor area ratio of 0.2 and a building plot of 1000 sqm, which does not necessarily mean you can just build 260 sqm so easily.

If the need is for a somewhat larger and contemporary kitchen as well as two additional children's rooms, then roughly 50 or 60 sqm should be calculated budget-wise and carried out realistically. Because you can tell that in the euphoria of a change, the scope here is somewhat overstretched.

but due to the current interest rates, I am not willing to put that much money in, but rather want to plan with what is available.

What does that mean? How much budget are you willing to pay for an enlargement?

Style - solid, red clinker bricks

I assume that you currently have red clinker bricks? I would definitely not make a red clinker brick extension, but rather clad it with wood. Because similar is not the same and makes an extension look cheap visually.

I can imagine that a roof structure with a number of children’s rooms + bathroom would be economically advantageous, provided that the flat roof can be opened for a staircase.

I can imagine that a roof structure with a variety of children's rooms + bathroom would be economically advantageous, provided that the flat roof can be opened for a staircase.

no additional storeys desired Sorry, I missed the headline :)

no increase desired

Sorry, I missed the headline :)

Where was this headline supposed to go?

... had overlooked the text "keine Aufstockung erwünscht" in the thread title and, by copying the text (with the headline formatting), apologized for her previous post where she had suggested an increase ;)

I can imagine that a roof structure with a variety of children's rooms + bathroom would be economically advantageous, provided that the flat roof can be opened for a staircase.

I had perceived the wish for no additional storey in the headline and accepted it out of sheer politeness. Technically, I belong to the team "only an eliminated old flat roof is a good old flat roof," and in this existing floor plan the staircase is conveniently located to add an attic floor. By the way: what is in the basement?

As far as I have determined, garden land does not increase the possibility of increasing the floor space index of the building plot. In this respect, you are allowed to build over 200 sqm. However, it may be that the building authority grants you more for social reasons, but I would clarify that with the architect and a preliminary building inquiry. By the way, the main terrace at the house also counts towards the floor space index, so a courtyard is counterproductive (even if it’s great). The question of budget still remains. (For whatever reason, I can no longer enlarge the floor plans and therefore cannot trace room sizes.) Of course, if you are already extending, a little more space than necessary is welcome. A courtyard also has its charm. But since you haven’t won the lottery now, and you can see that with each new version something more in the way of wishful thinking, rooms, and dreaming has been added, such as the all-purpose room of 60/70 cm, I would aim for a reset and set up the budget as well as the 200 sqm. Even if that then means moving towards a new build/another property.