Residents have a legal right to trim overhanging branches or encroaching roots originating from a neighbour’s tree or hedge. This being that you do not trespass, cause, or facilitate undue damage, that may result in the failure or decline of the relating trees.
You can only trim or prune vegetation back to your property’s boundary line. Unless an agreement has been made, with the relating persons.
This may need to be notified if within a Conservation area or a Tree Preservation Order (TPO) is present.
Protected trees – West Oxfordshire District Council
If you suspect tree works have been carried out without notice or approval
The Council will review information provided and will respond accordingly. Not every enquiry is enforceable and will be determined by the degree of the suspected breach.
Report a breach of planning regulations - West Oxfordshire District Council