We're end of terrace. Small garden between us and next door with a fence attached to both houses. Last year neighbours put a gate in the fence and attached it to our house rather than theirs (shed in the way their side). It's been a noisy nuisance - door slamming at all hours when bike owning tenants open and close it - but we decided in the interests of good neighbour relations - to put up with it. However they are now going to build a walk way for upstairs neighbours who apparently have right of way through their garden to their garden at the back.
Are we within our rights to insist that nothing else is attached to our house? And could we (should we!) have legally objected to the gate ?
Any advice welcome. Thank you.