Robert Plant bought a 19th century rustic oil painting from an antique shop in Reading, Berkshire. That painting ended up being used for the Led Zeppelin IV album artwork. The painting was juxtaposed and affixed to the internal, papered wall of the partly demolished suburban house for the photograph to be taken.
The building in the background of the photo located at Butterfield Court in Eves Hill, Dudley England.
Here's a google street view of the building now as it has gone through some renovations since the 1971 photo.