Luvley stuff but........
Call me a disbeliever:
I think is a set.
Look at the badly painted on brick-work, and where is the big garden bush shown in the long shots?
One can see the top of the basement windows, when it should show greenery.
Look like a set too
The bush is too small.
Logical really, cos the long shots would be a quick take, but all those folk coming in and out of the front door would take days to shoot and light. It would have meant closing off the road and attracting crowds of on-lookers.