ᐅ Permeable Pavements in the Building Permit / Planning Permission Application
Created on: 2 Jun 2017 21:39
H
Henrik0817123
Hello everyone,
What is the significance of permeable traffic areas in the building permit / planning permission? In our case, for example, the terrace is specified as made of water-permeable material, and for the driveway / access road, the building application lists "permeable eco-paving" (which is not required by the zoning plan). What happens if I want to use impermeable material instead? Regarding the floor area ratio and similar regulations, I believe it should not matter since everything counts there, even if grass is used for the driveway, as far as I know. The floor area ratio is being complied with; I am just uncertain about the permeability requirement.
Can someone help me with this?
Regarding the floor area ratio, I am also interested in who needs to apply for or approve changes if, later on, a larger paved area is planned than initially stated in the building permit / planning permission?
What is the significance of permeable traffic areas in the building permit / planning permission? In our case, for example, the terrace is specified as made of water-permeable material, and for the driveway / access road, the building application lists "permeable eco-paving" (which is not required by the zoning plan). What happens if I want to use impermeable material instead? Regarding the floor area ratio and similar regulations, I believe it should not matter since everything counts there, even if grass is used for the driveway, as far as I know. The floor area ratio is being complied with; I am just uncertain about the permeability requirement.
Can someone help me with this?
Regarding the floor area ratio, I am also interested in who needs to apply for or approve changes if, later on, a larger paved area is planned than initially stated in the building permit / planning permission?
Henrik0817123 schrieb:
and the answer was that the application always specifies permeable materials – since the building permit / planning permission only concerns buildings like houses and garages. Then they probably only build in a district where that always works out well. That may be. Reading helps, and most municipalities fall into the other category. But if they specify lawn pavers at twenty percent, concrete pavers at fifty percent, and asphalt at one hundred percent, I would take that as a signal: "they are strict here."
It is common that when removing tiles causes the thinly poured terrace to crumble, the new one is made slightly larger. When it comes to conservatories added in a piecemeal manner, you can probably assume that half of them are unauthorized structures; some even estimate the unregistered figure to be much higher. Take a look at cadastral maps and then compare them with aerial photographs. Building authorities sometimes do the same, which regularly leads to conflicts.
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Henrik0817123 schrieb:
So our house construction company handled the building applications. We were never asked what type of paving or terrace we wanted—...
It’s as if you don’t have to specify a terrace at all. There seems to be a contradiction here.
What happens if you don’t include a terrace and build one later...? I think your building application is no different from others, except that multiple signatures from you are required on these documents. Those signatures are binding, even if signed without fully reviewing the details.
Regarding the terrace: to my knowledge, the terrace counts as half of the living area. I might be mistaken, but in that sense, the drawing in the building application makes sense. It’s possible that you’re close to exceeding the floor area ratio (FAR) if you build a sealed terrace, and that may be why the building authority always includes a permeable terrace in the plan. You can check your numbers to see if this is the reason...
Regards, Yvonne
Henrik0817123 schrieb:
Regarding the floor area ratio and so on, it should not matter because everything counts, even if it is lawn used as a driveway as far as I know. That’s correct! The method for calculating the floor area ratio is specified in the land use ordinance. The areas must be measured regardless of the type of surface. Permeability is not mentioned here, but the development plan may include different provisions. That explains the varying approaches by different municipalities.
ypg schrieb:
Your building permit is binding. In my opinion, you cannot simply change something afterwards. Unless the change is exempt from requiring a permit.
Henrik0817123 schrieb:
Why should it be an issue if something is specified but then done differently? In my opinion, it isn’t, since an uncovered terrace in North Rhine-Westphalia is exempt from requiring a permit. However, it still must comply with all relevant regulations. The builder assumes full responsibility for this.
ypg schrieb:
To my knowledge, the terrace counts as half? But not for the floor area ratio, unless the development plan sets other rules. The floor area ratio is a complex matter, so unauthorized changes by the builder can definitely lead to illegal construction.
C
Caspar20207 Jun 2017 09:47By the way, in NRW aerial photographs are commonly used to verify whether sealed surfaces correspond with the official permits (building permits / planning permissions). After all, these have an impact on the amount of rainwater runoff.
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