Floor plan design (semi-detached house of 240 sqm) - experiences?

Hello everyone,

I am completely new to the topic of building and also new to this forum, so please excuse me if I sometimes ask silly questions.

About our starting situation:

Desired:
- House with basement (neighbor is building with a basement, we want that too, and it would be urgently advisable due to foundation requirements. See also the topic stepped foundation or underpinning)

The house should have 2 full floors + a gable roof and a max. building height 11m, ridge height 6.5m, roof pitch 20°. 0.4 / 0.7 as area specification. A garage would be great but I suspect that will be tight.

The plot with 240sqm and 2 parking spaces as specifications including development plan.

We are a bit lost and simply grabbed an example from the internet which represents the absolute dream. However, that is 174sqm living space. How to get a floor plan that comes out at 130-140sqm, I would really need help for that.

I can well imagine sacrificing the "office" on the ground floor for a proper hallway with space for a stroller, etc., so that a straight staircase becomes possible with storage underneath. I think this would make the living and dining area bigger again or the house smaller and thus more garden.

I tried to draw something on my own with "architect software" but I am completely lost. CAD for milling and so on I can do, but here I am out.

We are grateful for any tips and support or "wake-up calls."



Excerpts from the development plan

[IMG width="797px" alt="1722930877872.png"]https://www.hausbau-forum.de/attachments/1722930877872-png.87070/[/IMG]

Design of semi-detached houses and house groups

Semi-detached houses and house groups must have the same roof shape, roof pitch, and ridge direction (for pitched roofs). If the buildings are not built simultaneously, the building constructed later must conform to the criteria mentioned above according to the specifications of the first built building.

When constructing buildings with apartments, the necessary parking spaces per unit must be provided as follows:
▪ At least 1.5 parking spaces per apartment/unit over 50 sqm living space,
▪ At least 1.0 parking space per apartment/unit up to 50 sqm living space.
The total per construction project must be rounded up to the next whole number (i.e., for detached, semi-detached, terraced, and row houses, at least 2.0 parking spaces per unit must be provided).

Parking spaces, garages and buildings for the storage of necessary bicycle parking and/or waste bins in WA 1 - WA 3 (§ 9 para.1 no.4 Building Code and §§ 12 and 14 Land Use Ordinance)
When creating parking spaces and garages with their access routes, the areas fixed in the plan part without entry and exit must be observed.

A 5.1 Underground garages (Tga)
Underground garages are also allowed outside the buildable areas of the plot.

A 5.2 Above-ground garages (Ga), covered parking spaces / carports (Cp) and buildings for the storage of necessary bicycle parking and/or waste bins
Garages, carports, and buildings for the storage of necessary bicycle parking and/or waste bins are also permitted outside the buildable areas of the plot.

For the boundaries of public traffic areas, a distance of at least 0.5 m must be maintained for garages and buildings for the storage of necessary bicycle parking and/or waste bins; at their access or entry sides at least 1.5 m.

For carports (with supports and roofs), a distance of at least 0.5 m must be maintained from the boundaries of public traffic areas.

A 5.3 Open parking spaces (St)
Open parking spaces are also allowed outside the buildable areas of the plot on the entire building plot area, provided that no other regulations (e.g., planting requirements or driveway prohibitions) oppose this.

A 6 Other ancillary buildings in WA 1 - WA 3 (§ 9 para.1 no.4 Building Code and § 14 Land Use Ordinance)
Garages, carports, and buildings for the storage of necessary bicycle parking and/or waste bins are not considered ancillary buildings within the meaning of the following regulation:

Per residential building / main building, only one ancillary building with a maximum of 25 cbm is permitted. The minimum distance of ancillary buildings to the boundaries of public traffic areas is 1.5 m.

Semi-detached houses and house groups must have the same roof shape, roof pitch, and ridge direction (for pitched roofs).

Means: coordination with the neighbor!
How is he building? With whom is he building?
Architect?
You can plan as many gable roofs as you want – if your neighbor goes faster with a shed roof, your planning is almost for nothing.

We are grateful for every tip and support or "wake-up call".

You should have the houses built together. Individual small details are basically possible, but not the outer shell.

I tried to draw something independently with "Architect SW" but I am totally lost. I can do CAD for milling and so on, but I am out of my depth here.

Yeah, the first step would be an architect or a general contractor/house builder who builds the right semi-detached house there.

0.4 / 0.7 as area specification

Means: 96 sqm may be built over, 168 sqm of living space may ultimately result.

Plot areas on the entire building plot area

Then just show it and upload the site plan with the building boundaries.

And how is the budget? The 140sqm plus basement need to be paid for.

Means: coordination with the neighbor!
How is he building? With whom is he building?
Architect?
You can plan a gable roof as much as you want – if the neighbor comes faster with a shed roof, the planning is almost pointless.

You should have the house built together. Individual small details are basically possible, but not the exterior shell.

Yeah, the first step would be an architect or a general contractor/house builder who builds the right semi-detached house there.

Means: 96sqm may be built over, ultimately 168sqm living space may come out.

Then show it and upload the site plan with the building boundaries.

The neighbor also wants 2 floors and a gable roof and a basement. Unfortunately, that’s all we know.

I also think that the exterior shell should be the same (not a must), but it does of course make sense to do it with one company. It’s also unclear who they want to build with. Baufritz was apparently the wish but phew, that won’t be feasible for us.

And what about the budget? The 140 sqm plus basement need to be paid for.

Actually, 130 sqm are just enough, it shouldn't cost more than €450k. We don't want luxury but also not a cheap house. Solid substance with normal fittings. Appointments with the following companies are scheduled: - Fingerhaus - Köhler - Schwörerhaus - Hauser - Büdenbender tbd.

Means: coordination with the neighbor!
How is he building? Who is he building with?
Architect?
You can plan as many gable roofs as you want – if the neighbor comes faster with a shed roof, the planning is almost useless.

You should build the house construction together. Individual small details are generally feasible, but not the outer shell.

Yeah, the first step would be an architect or a general contractor/house builder who builds the right semi-detached house there.

That means: 96 sqm may be built over, 168 sqm of living space may ultimately result.

Then just show it and upload the site plan with the building boundaries.

I’m currently working on making a sketch. However, the development plan is very cryptic to me and I don’t understand everything about it.
I think a visit to the architect is necessary. How much should one budget for that? 6-7k €? Or is a “first sketch cheaper”?