Demolition of existing house - new construction: what does the development plan allow?

Hello everyone!

My parents own a rented plot with a house built in 1960.
My wife and I are considering whether we want to build a house there for ourselves. (Demolition of the existing house)

I have kindly received the development plan from the municipality. See attachments.
Now, as an unknowledgeable person, I can interpret a lot into the plan. Therefore, it would be great if you could help me with a few questions.

I don’t see anything in the development plan about floor area ratio, floor space index, eaves height, etc. Which other documents do I need to request from the municipality to be certain about further regulations? For example, the building usage ordinance mentioned in the declaration (see attachment)?

Is it allowed to use the entire area bordered by the blue building line as the ground floor?
One attachment shows my attempt to estimate the blue bordered area dimensionally in Google Maps.
I suspect there is a maximum roof ridge height, which with a 50-degree roof pitch limits the attic floor area so that it is significantly smaller than the blue bordered area. Do you see it that way too?

Does the development plan allow the attic floor area to be smaller than the ground floor area?
For example, if the ridge runs from north to south, but the roof only covers 2/3 of the north-south length of the ground floor => roof terrace possible on the south gable?

To my understanding, the garage may only be as large as indicated by the red dashed line.
Currently, a masonry hobby workshop is attached to the garage on the east side, and a timber shed is attached to that reaching the residential house.
We like this L-shaped framing of the southwest garden, but in my opinion, it does not conform with the development plan.
How likely is it to be allowed to attach outbuildings again there with a new residential house (double garage and hobby workshop, no shed)?

Thanks already for your opinions!

Jo

I have kindly received the development plan from the municipality. See attachments.

You can only see a tiny section of the image part. There should also be a usage template in it, and there should also be "textual determinations." What is so dilapidated about a house from 1960 that demolition is being considered?

Ground floor and attic, i.e. single-storey construction. There must be some kind of scheme with letters and numbers on the plan. That is meaningful.

If the size of sheds and other outbuildings is exempt from approval or approved by the building authority according to the state building regulations, they may be built. I believe it is much easier to simply leave these buildings standing and then possibly just replace them with new ones.

Thank you for your responses!

You can only see a tiny section of the image part. There should also be a development plan included, and there should be "textual regulations" as well.

A development plan is not on the drawing. I will inquire about it at the municipality, along with the textual regulations. Thanks for the tip.
I hope the maximum roof height will also be stated somewhere.
Am I correct in thinking that the roof pitch of 50 degrees will significantly restrict the attic floor area compared to the building window size?

What is so terrible about a house from 1960 that demolition is being considered?

Too little living space (1 child here, possibly a second), low ceiling height everywhere, problems with saltpeter in the basement, only two-phase electrical system, no insulation, raised ground floor (not liked, and if building then the goal is barrier-free). I estimate that a conversion or renovation would cost about the same as a new build.

I think it is much easier to simply leave these buildings standing and then possibly just replace them with new ones

What do you mean by "replace with new"? Do you mean the same as me: demolition and new construction in the old locations with a slightly changed configuration (double garage instead of shed)?

Best regards
Jo

...
Am I correct in thinking that the roof pitch of 50 degrees will significantly restrict the attic floor area compared to the building window size?

Jo

What do you mean by your question? You are allowed to build a single-story house with an attic conversion. Roof pitch approx. 50 degrees. This means a very small knee wall, so it won't become a habitable space with standing height. I don't see any building window. How about you post everything here instead of just the zoom of your property.

What exactly are you aiming at? Ask us directly and not indirectly – we are not the intimidating building authority, and you can't fool even that with trick questions [emoji6]

A usage template is not indicated on the plan.

Unfortunately not on the part we see here. But I don't know of any development plan where it is missing.

Am I right in thinking that the 50-degree roof pitch will significantly restrict the attic floor area compared to the building envelope size?

A 50° roof pitch is really steep and I already consider it a steep roof that might require a license. I wouldn’t want to use it to the full extent. We are definitely missing too much information here for your optimal gable cross-section.