The bold creature, unsurprisingly nicknamed Whitey, pays a daily visit to Terry Gouldenâ€™s home, where he taps on the window every morning until breakfast is served.
He has become such a fixture that Trampas the border terrier no longer turns a hair when he arrives.
Mr Goulden, 69, who makes props for Hollywood movies, has a five-acre garden full of wildlife at Ware, Hertfordshire.
He and wife Donella say they first spotted Whitey four years ago and decided to put food out for him on the window ledge.
Whitey is not a total albino because he has black eyes and feet, not pink. According to wildlife experts, the odds of a pure white squirrel being born are one in 100,000.