Verified answer

60 days if an annual lease, as that's usually when you would need to notify the landlord of your intent to non-renew.

30 days otherwise.

A 30 day notice is polite and normal

a couple months ahead

Same amount as you give the landlord.

Couple months. 1 at the least.

As far in advance as possible. At least 30 days, preferably much more.

I would think it is a discussion you need to have sooner rather than later, if you are both signed on the contract and you do not to sign a new contract and wish to leave then the sooner the roommate knows the better as they can then decide if they wish to also give notice and leave as well, renew in their name only or find someone else to sign a new contract with to replace you

Usually thirty days.

Thirty days average.

Unless there are unusual circumstances, you should tell them as soon as you know. At the very least 30 days before you plan to move.