We bought a Grade 2 listed cottage after having looked through the window and putting an offer in, six hours later it was ours. Then the fun started: the chimney needed rebuilding, bath taps were live (infact the shower was live as well) the fitted wardrobes were causing damp (they came out the day that we moved in), the front door needed replacing (listed building consent required), the windows needed replacing (listed building consent required)
It’s been expensive but it’s been worth it
Caveat emptor