Attic conversion with a 25-degree hip roof - a sensible project?

Have fun trying to get the furniture up there. By the way, this also applies to all the construction materials for the extension.

You could lift the construction materials in through the roof with a crane anyway if the roof is open because of the dormer extension? Or am I imagining that too simply?

The fantasies of lifting building materials into the open roof using a crane (how long is it supposed to stay open?) and installing dormers and stairs are already unrealistic with the given budget. I don’t see the problem with 200 sqm of floor space. I would try, if it is statically possible, to remodel the current living area. No idea if that is realistic due to statics, wall construction. But purely on paper and based on the current layout and without knowing the wall construction and wall lengths: Bedroom 1 and 2 will each become children’s rooms. The office will become the master bedroom, and with the oddly shaped kitchen, I would have it checked whether and how it can be separated so that the part facing the living room is opened and integrated there. The part facing the current office will become a (windowless) office. It would have to be checked whether windows can be installed afterwards.

So, here again in better

Unfortunately without measurements. But it now clearly states what I had already imagined I could decipher before: namely that the utility room whose creation was complained about already exists (???)

As a rather unskilled person when it comes to craftsmanship, one probably lacks the imagination at this point. Would a large dormer not help either?

The lack of craftsmanship only becomes

You could lift the building materials in through the roof with a crane if the roof is open anyway because of the dormer extension? Or am I imagining that too simply?

really clear. 25° is enough for an early dismissal from school due to heat, but building dormers one would have to go crazy with a roof expansion without a knee wall. Despite the drawings from in post #3, it still seems unclear to you that there is standing height (200, not yet 230!) only in the nave (above the hallway, roughly up to the closet niche or the swinging area of the doors of the north-facing rooms).

But I don’t understand why you still want to keep talking here at all:

The fantasies of lifting building materials by crane into the opened roof (how long is it supposed to stay open?) and installing dormers and stairs were already dispelled by the budget specification.

But I don't understand why you even want to continue talking here:

...because the 70k is our maximum desired amount. Through a sale of countries, significantly more is available to us, yet we do not want to waste money unnecessarily if the final result in the new upper floor is modest.

I can't imagine that this can't be planned without an attic conversion.

I'll quote myself.

With 200 m2, the floor plan should be adjustable.

In my opinion, that's also easily possible.

The forum members here will gladly show you that.

Then maybe 50k will be enough.

Although in the attic it looks like neither the roof nor the ceiling are insulated.

What kind of heating is installed?

What is the bungalow supposed to cost?

...because the 70k is our maximum desired amount. Through a sale of country acreage, significantly more would be available to us, yet we do not want to waste money unnecessarily if the end result in the new attic is modest.

Do you really want an attic just to have an attic? Even if the rooms, despite a lot of money, end up being small chambers, while on the ground floor there are three rooms around 18 sqm each? Other families live on less than 200 sqm and manage perfectly well. Ask yourselves seriously: Do you need a 28 sqm kitchen next to the almost 50 sqm living room? Or might it make sense to remodel there? The stairs going up would have to go somewhere. That would come at the expense of at least one room on the ground floor and it would still remain a "makeshift" solution, because this roof simply was not designed for conversion into living space. Therefore, I do not understand your line of thought.