The Norfolk County Council website has an excellent section for historic maps of the county. It can be searched in a number of ways, including place name and address. Available maps are the 2014 Ordnance Survey, as well as the 1st edition of the Ordnance Survey; 1988 and 1946 aerial surveys; tithe and enclosure maps.
As shown in this image, it is possible to display any two of these maps side by side; navigating around one is automatically reflected in the other.
The NCC site can be accessed by clicking here.