Which is worse?
The service charge is worrying because there’s so many stories online about people who’ve bought new build houses then not been able to resell after management charges get increased dramatically.
The right of way thing is a worry because you effectively have to cross a shared path to get to your garden so it’s like the garden isn’t attached to the house. Garden itself can be fenced off completely but currently just has a low wall with an opening to walk through to get into the garden with no gate on it.
All the usual benefits/drawbacks of new build versus old house apply.
I’m currently feeling like the answer is wait and hope something else comes on the market soon.