I remember reading a book, probably 10 years ago now at least, though the book itself may be older than that. It was about a girl who goes to live in a large house in the country (I don't recall why). She must have had adults there but I don't recall if they were relatives.
The whole story had a slightly creepy tone. There was a maze in the garden of the house and I think the climax involved a race around that maze. In the centre was something important - possible a golden statue? It may have turned into a person at the end.
She may possibly have had a boy friend, though I am not certain on that point.
I am fairly sure that the girl's surname was Noone and the house was also called Noone House/Hall or similar. At some point she realised that Noone was the same as No-one and somehow this was relevant (and also a little freaky from what I remember).
The book was probably aimed at 14 year olds upwards - though again I'm not sure. Thank you for your help!