Regulations development plan semi-detached house

Hello,

I am interested in a plot of land on which I would like to build a semi-detached house with an acquaintance. However, some regulations in the development plan make me a bit doubtful. What kind of house style could be built here?

The regulations are:

- Maximum permissible one-story,
- Floor area ratio 0.4 for semi-detached houses,
- Plinth height maximum 0.3 m and eave height maximum 4.0 m, measured from top edge of the roadway,
- Gable and shed roofs with the same pitch of both main roof surfaces,
- Roof pitch of gable roofs 28° to 48° and of shed roofs 15° to 48°,
- Red roofing according to [RAL color specifications],
- Exterior walls at least 50% in red facing brickwork according to [RAL color specifications]

I am interested in a plot of land on which I would like to build a semi-detached house together with an acquaintance.

That is very sensible. "A semi-detached house has TWO halves," therefore it is best to build it as a whole, i.e. planned together.

However, there are some regulations in the development plan that make me a bit suspicious. What kind of house style could be built here? The regulations are: - Maximum permitted single-storey, - Site coverage ratio 0.4 for semi-detached houses, - Base height maximum 0.3 m and eaves height maximum 4.0 m, measured from the top edge of the roadway, - Gable and shed roofs with the same pitch on both main roof surfaces - Roof pitch of gable roofs 28° to 48° and of shed roofs 15° to 48°,

Single-storey refers to the number of full storeys; above the ground floor only recessed or attic storeys are possible here, which according to the state building code may be at most 2/3 or 3/4 the size of the ground floor. The site coverage for semi-detached houses may amount to a maximum of 40% of the plot area. The ground floor level should not exceed the road surface edge by more than 0.3 m. I see houses here with pitched roofs as gable roofs and probably no more than 1 m knee wall, or with recessed storeys with mildly pitched shed roofs. Furthermore, the style apparently desired is Westphalian-rustic:

- Red roof covering according to RAL color specifications, - External walls at least 50% in red facing brickwork according to RAL color specifications

So facing brick or partly facing brick. The roof covering may also be brown or purple if the shade has a RAL number in the 3000 range, so formally "red" regardless of reality. Typical city councillors without a clue, but whatever: there are worse building regulations; these here are at least comfortably formulated in lawyer-readable language :)

First of all, thank you very much for the quick response. I am really very new to this field and am dealing with a development plan for the first time. Is it normal that there are so many regulations? It seems a bit strange to me. We would like to build a semi-detached house as a city villa, but as far as I understand it, this would not be possible or would it? Or what style would be possible here at all, so that I don’t have so many roof slopes. What colors would be possible, for example? I would prefer not to have a red roof. Ideally, I would like anthracite or something similar.

You can forget about anthracite.

has already given you the answer. Just read it through carefully once again.

That development plans are sometimes very detailed is not so unusual. It is about a uniform cityscape.

Is it normal that there are so many regulations? It seems a bit strange to me.

Development plans are usually quite extensive in content. Sometimes a bit stricter with many requirements and sometimes a bit more flexible with more freedoms. Things like building boundaries, boundary distances, maximum heights, floor area ratio, and floor space index can be found in every development plan.

You can read the basic things yourself, but for subtleties a professional should be involved.

We would like to build a semi-detached house as an urban villa, [...] I would rather not have a red roof. I would prefer anthracite or something similar.

You can figure out the basic stuff yourself, but for subtleties a professional should take over.

Whereas a "urban villa" or anthracite as a shade of red would not be a subtlety here, but hopeless—even if you dragged Rolf Bossi all the way to the highest court :)

Is it normal that there are so many regulations? It seems a bit strange to me.

I’ll gladly say it again: be glad that you only have these, and that every assessor will recognize them as clear and unambiguous. We often see ones here from which even the most experienced herbal witch wouldn’t make sense of under a full moon. I have already read real crime stories just about floating height restrictions that are hardly resolvable in the first instance. Some zoning plan drafters only reach their shame threshold at the facial expressions of the garden gnomes.

Or what kind of style would even be possible here so that I don’t have so many roof slopes.

As already noted, I have already answered the style options (exhaustively). You don’t have many roof slopes, but two with a gable roof and only one with a shed roof. If you mean the proportion of areas affected by less than full standing height: that is unavoidable with a non-full-storey upper floor. But the value of living space is not measured by whether you could put a broom closet in every corner of the room. By the way, right at the beginning of post #2 I hid a Google search phrase for you; at the same location you can also read up on this aspect ("How the knee wall influences the window question in the attic") and the way to me.