There is no need to repair it. You receive it intact. All buildings you can't build yourself are destroyed though.
It is only possible to raise the economy of a province through certain buildings e.g. the tier 4 Aquaduct.

I have the same question/complaint. In my experience the annexed province does not recover and there is no way to bring it back to its original value. If this isn't expected behaviour then it must be a bug.

Originally posted by AnthalasDaelith:

There is no need to repair it. You receive it intact. All buildings you can't build yourself are destroyed though.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=707981830

On this screen u see, that this is not right. I'm currently have 2 damaged provinces.

Originally posted by AnthalasDaelith:

It is only possible to raise the economy of a province through certain buildings e.g. the tier 4 Aquaduct.

Never more raising them without buildings? ... So u would never raise a province with 1 economy up? That's bad.

I don't understand? When you move into a province it shows a fist and a red number that will count down by one each turn and when it reaches 0 at the beginning of your turn it flips to you and has it original economy level. Been working like that in 2.0.3 and it still works in 2.0.4

Red "Damaged" could indicate that a spell is present which is negatively affecting the province income in some way.

If there is a spell active, shouldn't it be show in tab "active spells"?
There's nothing. The right red province is also under control of me since more than 20 turns. Does a spell least forever?

There are some spells which last until they are canceled by their caster, though it's unlikely in this case - as side note though, only spells which you have cast will appear in that tab, but the province info card will show icons for every spell (good or bad) which affects it.

I'm wondering if there is maybe a bug in the acqueduct building.. it's the only thing i can think of which affects the economy level of a province.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=708052638

So there is no active spell. But the province is still red marked. Also i have 2 others, which are marked red and there is also no spell. (Bug?)

Looking like a bug, yes - we shall investigate.

Hmm, isn't that precisely what is said in my post?

The capitals taken of realms are shown "red". And from what i see, the capital of the former Riesental has economy 3 and those of the former Ladvia is 4: they are not damaged as it's the same number as the begining. Just the "red" shows you which capital you own (and so which former realms were destroyed...)

Capitols have a higher maximum Economy level, when a capitol province is annexed it loses the capitol status and the maximum economy is reduced accordingly. The bug is that the game does not account for this and displays it as being damaged.

Allright, that sounds plausible.
And if this is so, u should also take a look at the other capitals.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=708529017

Crivia in the lower right corner, Maltessa two provinces to the left, or Goldenspring in den left lower corner. This all were capitals as i annexed them and they are not lowered or marked red.

Ok, bump, problem still persists a year later. every single province I've taken is damaged to some degree and nothing recovers even slightly. pretty annoying having good provinces saying 73 out of 450 base income after owning them forever.