For those who do not know What a door overhang is
Then we can define it for you. The thing that you should know about the door overhang is that it is a cover that hangs over the door literally and protects you from sunlight, rain or snow.
In all other respects, building a covered entry is like undertaking any other construction project. The structure needs to be supported on a foundation that reaches below the frost line, and it must conform to the building codes in effect where you live.