Grymharth's Woe also has that.

and i have been in offline houses with doors like that, generally used for pulling up large objects into the house that cannot go up the stairs.

edited to add:
Amsterdam canal houses have a pulley at the top of the house to pull stuff into or out of the house, like furniture or in the past valuable goods from trading ships.


Base game Nord buildings do not seem to have a hook or pulley for rope and it is a door instead of a window, but as Skyrim has multiple harbours i can imagine these doors are supposed to be used the same way in-universe.
Maybe they use magic instead of ropes and pulleys

ESO_Nightingale wrote: »

There's still a massive gap under the door outside

ah yea, sorry i saw the door and got distracted by what it might be used for and did not see the gap under it.

hope the bug can be fixed soon