ᐅ Approval for Patio Roof with Glass / Double-Wall Polycarbonate Panels

Hello,

we built a house in 2015 with a fairly large terrace measuring 4x7m (13x23 feet).
When we submitted the building permit (planning permission), a roof covering for the terrace was not allowed. The terrace is about 1m (3 feet) high and outside the building area, which is why we had to pay additional fees to build the terrace.
Anyway, we have since installed an awning on the terrace.
That’s all fine, but in rainy weather the terrace is completely unusable because the awning can only be left open to a limited extent in rain.
My question is: would a permit still be required if we used a glass roof or polycarbonate sheets as roofing material? My neighbors would surely not object, as I have enough distance from their properties.
I have already thought of several ideas to do this without a permit, or at least economically, so that everything could be removed again quickly if authorities requested it. But these ideas are usually not very reliable.
1. Stretching a transparent tarp with wire cables and a cable system.
2. A wooden substructure on several posts (not attached to the house wall) with inexpensive corrugated sheets as roofing.
and so on.
But basically, we want a glass roof connected to the house (so not freestanding).
You might ask why I don’t just contact the building authority. The reason is that the house has officially not yet been finally surveyed. I want to avoid this just because of the cost. So I’m a bit concerned that asking such a question might “wake sleeping dogs.”

Do you have any idea if this could somehow be possible?

Thank you in advance for your answers.

Hello Ibo

I’m not sure, but I don’t think anyone here will easily give you advice on how to bypass official regulations... I understand the frustration, but there is likely a valid reason why it was not approved.

What was the reason?

First of all, thank you for the response, Aytex.

The reason was that it supposedly increases the living space, so it tends to be considered similar to a conservatory.

My concern is not about avoiding any regulations, but rather whether a glass roof also requires a building permit / planning permission.

In summer, when it rains, we always have to rush to bring everything inside to keep it dry, and a planned barbecue day can be canceled very quickly.

As a last resort, I see only a transparent cover tarp that I would stretch over the terrace. However, wind could become a problem in this case.

We had to apply for a building permit / planning permission for our 6x4m (19.7x13.1 ft) glass/aluminum patio roof. However, I believe that if the depth had been less than 3m (10 ft), it might have been exempt. Of course, this can vary from state to state.

By the way, if you’re already panicking about the few euros for surveying costs, you definitely don’t want to know how much a glass patio roof costs.

So, the surveying costs are around 1,200 euros, and a glass roof between 5,000 and 10,000 euros—that much I understand. But if I can save on those costs, why not.
Well, that’s not really the point. It was just a small hope that the glass roof might possibly be acceptable without a building permit / planning permission.

I think I understand ibo in the sense that he doesn’t want to start the patio roof before the house is finally measured, because otherwise the authorities might get suspicious and say, “Wait a minute, you weren’t allowed to do that.”

Personally, I would be cautious with the design; all of that could collapse in heavy rain...

But again: did the authority categorically reject a conservatory, or did they say, “At that size, it would still be acceptable”?