Building permit with/without building land?

Hello.

We own a property designated as "Freifläche mit Gebäude" in MOL and want to build a "log cabin" (approx. <40m²) on a concrete foundation there. The property has a street-side access and water and electricity are officially connected.

I have now read that such constructions "always" require a building permit and I have some questions regarding this:

Is applying for a building permit sufficient, or does the property first need to be converted into building land? If yes, can parts of the area (e.g. the 40m²) be converted into building land while the rest remains as before? (Or does that not make sense at all?) Would there be significant costs involved since it is already "developed"? Since I have no knowledge on this topic at all, I would greatly appreciate any tips.

Best regards

We own a plot of land designated as "open space with building" in MOL

Mol in Belgium or on the Polish border?

Reached "log cabin" (approx. <40m²) with a concrete foundation.

What does that mean? How big exactly - sqm and volume? How is it intended to be used? Permanent residence or garden house? Connection to sewer/water/electricity/telephone needed?

Designation "open space with building"

That is a normal plot of land. In principle, every plot of land that can be built on or is built on has "building and open space" in the land register.

or does the plot first have to be converted into building land? If yes, can partial areas (e.g. the 40m²) be converted into building land and leave the rest as before? (Or does that not make sense at all?) Would there be significant costs because it is already "developed"?

No, you don’t have to. No, you could not convert partial areas. Yes, that does not make sense. Yes, that costs a lot of money and can easily reach six figures and more (if you actually want to rezone non-building land), which is only done for larger areas. A plot like yours would never be touched with a ten-foot pole. Such a process can also take up to 5 years...

We own a plot of land designated as "open space with building" in MOL and want to build a "log cabin" (approx. <40m²) with a concrete foundation there. The property has street-side access and officially has water and electricity connected. Now I have read that such structures "always" require a building permit and I have questions regarding understanding: Is applying for a building permit sufficient, or does the land first have to be converted into building land?

It is crucial to know what the land currently is and where it is located. The district is less significant; from it you can only derive which state building code applies there. But if the land, for example, is in an outer area, even a building exempt from procedures in a residential area according to the state building code would be excluded. First of all, the type of area must fit. I am by no means the only non-hunter who would still like to have a hunting cabin for card games – which is why §35 exists.

@ Thank you for the answer, although I am not sure which part here is meant sarcastically and which is not. For what reason would someone "not even touch" my property with a pair of pliers? @ I am a layperson and cannot answer that. It is a garden plot within a village which is designated as a "settlement." The little house should actually be more for visitors/guests and the property is a weekend garden plot of about 5000m². Water, electricity, and access are available.

I am a layperson and cannot answer that. It is a garden plot within a village that is designated as a "settlement." The little house should actually be more for visits/guests and the property is a weekend garden plot of about 5000m².

Even a layperson can take a look into the land register and/or inquire at the building authority which type of area their property belongs to. This thread might enlighten you:

which part here is meant sarcastically and which is not. For what reason would someone "not even touch" my property with tongs?

None of it is sarcastic. Turning non-building land into building land is roughly like going to the car dealer around the corner and telling him you want to buy a car that he should specially build for you. So with planning, construction, all technical approvals, involvement of offices and authorities. It was absolutely serious that something like this can actually take 5 (in words: five) years. P.S. You can also just call or stop by the building authority. Then you will get a reliable answer in a few minutes.