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Depends how much you want to modify it, as basically you have to get sign off on anything you modify structurally as far as I understand. (My friends owned 2/3 of a former terrace of grade 2 listed cottages, then bought the final one and knocked them through into one - they had to leave a staircase in, even though it was blanked off at top and bottom).
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Grade 2 listed is tricky if you intend to modernise. Depending on condition, the planners aim will be to keep original features, or get you to restore it to its former "glory".
Obviously, very often, occupiers will modernise it without permission, so you can very inherit non-signed off things and that can become complicated. My partner's (architect) firm moved into a central london listed property and they can pretty much do nothing to it.
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Assume a starting point of 'no' to what you are wanting to do and be prepared to throw money at it. Also get used to leaky single glazing and uninsulated walls (assuming they are both still in original condition) because local authority/heritage offer depending it is unlikely that you can massively change these.
As @owl post, you can make alterations to listed properties but everything needs to be fully justified and respectful of the listed setting. It's all just a little but more expensive, a little bit slower, and with more compromises.
Has anyone ever bought a listed property? A nice place has come up, but is grade 2 listed and before I get too far into looking into it thought I'd check to see if it's something best to avoid.