I just bought Proudspire Manor and fully decorated it.

I discovered that the door to the "balcony" is glitched. It lets me outside okay but will not let me back in. The door label says "Proudspire Manor. Locked. Needs a key."

I was given a key of course and the other outer doors work okay. I probably have no need to go out to the balcony but if I do I can reenter through a different door. It's annoying but not a game breaker.

The door should work. I am hoping for a fix to be included in the next patch.

Haven't noticed that door even yet gonna go see if the same thing happens. Question does your Thane react to you like they have no clue who you are? Random speech not in conversation....she says things like Can I help you? as if I am intruding in my own house

They have not made me Thane yet so I don't have a housecarl. I have to do one more Radiant quest.

I remember I have the same problem very long ago, just after I buy the house, but before I buy furniture for her.

But now I can enter from the balcony, everything is ok, but I don't know if it's because I have equipped the house or not ...

I noticed this also ..way back when.....what i recalled is that the door was locked (balcony) until I had gone through the Front door of the house a few times.

Yup, the door was tied to the Solitude Fletcher's key. I doubt it was intentional, even though as there's no clue which key it would be or even if there would be one, and if they wanted it to be accessible but hard just lock it 100.

Yeah don't worry, all the doors will work fine in the house.
The 5-weapon rack in the basemant is glitched though...
Plus the little clipping line in the wall (above the mannequin), some guy on the workshops had a tiny fix for that which I grabbed, works like a charm.
Nice basemant, needs a chest down there.

Weeee! I became Thane and was given Jordis, the housecarl. That Balcony door is now behaving correctly. Weird. Maybe Jordis unlocked it for me. Also, Elisef gave me the Blade of Haafingar, an enchanted steel great sword. Maybe that glitch was fixed in a patch. I suppose that sword belongs on the weapons rack. I have better swords than that, one being a legendary Blades sword. I'm a 1H kinda gal.