kjmpde
I do think that planning rules are peculiar. I once attended a planning meeting where a woman wanted to rebuild her house which had burnt down. the fire brigade had confirmed that the fire had spread very quickly due to the thatched roof and also burnt down the adjacent buildings. the lady wanted a tile/slate roof on her house. the local councillors were more concerned about how "pretty " thatches were and not the recommendations to have a less roof which burnt down so quickly. The same with applications to remove trees - the risk to human safety goes out of the window when the tree officer likes a particular variety of tree.
I know of one developer that bought several houses in our village and then built extra houses in the gardens. There is also the old trick of getting planning permission for a garage and then it is so easy to get permission to convert into an extra room.
Any thatched house is going to be listed and strict controls on replacing like with like and very little leeway.
Extra houses in gardens is very normal infill and as long as it’s a similar style will usually get passed
Converting a garage, maybe into a “granny flat” is allowed, as ancillary to the main house as a single dwelling, and cannot be later sold off.
Empty property, pubs are often left empty if they are not going to be economic, but it takes 3 yrs to get change of use. Several in this area have been changed to residential, 2 with little car parking into starter homes, one larger site into 2 detached and 2 semis, very successfully.