We live in a pub converted into 6 flats. We are on ground floor and there is a basement below currently not used( they had planning permission to make it into a gym for the building initially) It has no light but required headheight. We want to buy it from freeholder to extend our flat into the basement and create a light well from inside our flat to basement. Are we allowed to do that without planning permission?
We have permission from freeholder, do we also need it from property management company?