During the Christmas break, Quirrellmort was able to get as far as the Verres-Evans garden, so if the protection is in place it extends at most to the physical walls of the house, which isn’t much
In canon, it certainly doesn’t extend to Harry’s wandering about on the streets, which is a huge hole in the protection (making it necessary for the OotP to tail him whenever he leaves the house).
In canon, it certainly doesn’t extend to Harry’s wandering about on the streets, which is a huge hole in the protection (making it necessary for the OotP to tail him whenever he leaves the house).