ᐅ Building a 150-160 sqm Single-Family Home in Parents’ Garden – Feeling Overwhelmed!
Created on: 24 Jun 2021 16:15
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GnortiNRWG
GnortiNRW24 Jun 2021 16:15Hello everyone,
My partner and I are planning to build a single-family house of about 150-160 square meters (1,615-1,722 square feet) in my parents’ garden. The plot we want to use is around 500 square meters (5,382 square feet).
It is a vacant lot, designated as a residential area in the land use plan, but there is no binding development plan. It is directly adjacent to the street, so it is serviced, and the neighboring houses vary greatly in color, height, and orientation.
Now to our problems.
We would, of course, like to build as close to the street as possible to avoid wasting garden space. However, the houses on both sides are set quite far back. (Attachment plot 70)
We will need to submit a building permit inquiry to find out where our house can be positioned.
When I called the building authority, I couldn’t even get a clear answer about whether we are allowed to build at all.
Person A said yes, person B claimed it is an outer area where building is not permitted, and person C said they cannot give me any information by phone, and so on.
Problem 2: The soil on our site seems to be problematic in terms of infiltration (hardly possible).
Therefore, before planning the floor plan or anything else, we need to have a geotechnical report done.
But this can only work once we know where the house is supposed to be placed… which we only find out after the building permit inquiry.
And now I don’t even know if building is allowed at all if water cannot infiltrate on the property.
So we definitely have to start with the building permit inquiry, which will cost about 800 € (approx. $850) with an architect.
After that, we would commission the geotechnical report (quotes range from 2,100 € to 2,600 € / approx. $2,230-$2,760), which might then show that building is impossible due to lack of infiltration options on the soil.
Then we would have spent about 3,600 € (approx. $3,780) and maybe achieved nothing.
To sum up: I somehow can’t make any progress without the other things and feel a bit stuck in a loop—
Could you please share your assessment and advice on the best way to proceed?

My partner and I are planning to build a single-family house of about 150-160 square meters (1,615-1,722 square feet) in my parents’ garden. The plot we want to use is around 500 square meters (5,382 square feet).
It is a vacant lot, designated as a residential area in the land use plan, but there is no binding development plan. It is directly adjacent to the street, so it is serviced, and the neighboring houses vary greatly in color, height, and orientation.
Now to our problems.
We would, of course, like to build as close to the street as possible to avoid wasting garden space. However, the houses on both sides are set quite far back. (Attachment plot 70)
We will need to submit a building permit inquiry to find out where our house can be positioned.
When I called the building authority, I couldn’t even get a clear answer about whether we are allowed to build at all.
Person A said yes, person B claimed it is an outer area where building is not permitted, and person C said they cannot give me any information by phone, and so on.
Problem 2: The soil on our site seems to be problematic in terms of infiltration (hardly possible).
Therefore, before planning the floor plan or anything else, we need to have a geotechnical report done.
But this can only work once we know where the house is supposed to be placed… which we only find out after the building permit inquiry.
And now I don’t even know if building is allowed at all if water cannot infiltrate on the property.
So we definitely have to start with the building permit inquiry, which will cost about 800 € (approx. $850) with an architect.
After that, we would commission the geotechnical report (quotes range from 2,100 € to 2,600 € / approx. $2,230-$2,760), which might then show that building is impossible due to lack of infiltration options on the soil.
Then we would have spent about 3,600 € (approx. $3,780) and maybe achieved nothing.
To sum up: I somehow can’t make any progress without the other things and feel a bit stuck in a loop—
Could you please share your assessment and advice on the best way to proceed?
Unfortunately, I can’t help you with the procedures for new construction. However, you will have to accept that in some areas you need to pay in advance and may end up losing money. I also wasted money on an expert who brought me absolutely no benefit. In that case, it was only about 400 euros (around $440), but it still hurts. The second expert wasn’t much better and has not yet sent an invoice; I expect it will be the same with him. The architect also doesn’t work for free, and we still don’t know whether we will be able to continue based on her plans...
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hanghaus200024 Jun 2021 21:30Have you already found out if it is in the outdoor area?
GnortiNRW schrieb:
Can you give me your assessment and tips on how to proceed?Show a not too small plot map excerpt, along with an aerial photo.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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GnortiNRW24 Jun 2021 22:4311ant schrieb:
Please show a larger cadastral section and also an aerial image.Sorry, I uploaded the wrong one. H
hanghaus200026 Jun 2021 08:23Have you already checked the land use plan to see if the plot is located in an outer development area? You might also want to check the geoportal of the federal state. Alternatively, please specify the exact location of the plot here.