I know i'm coming to this discussion very late but I hope RobynD will eventually pick this.
As a child in the late 70s/early 80s, I lived in a semi detached house on Southbrook Road, in Countess Weir.
Our neighbour was an elderly lady who (along with her husband) had bought their house new in about 1940/41. The houses (17, 19, 21 & 23) were built by the same builder who had gone on to live in our house at no 21.
She also told me that the estate was built on land which once belonged to Tollards Farm and this was the reason why the road which ran parallel to Southbrook Road, was (and is still) called Tollards Road.
Further more, I can recall playing in the stream which ran between our estate and the Burnthouse Lane Estate (near to where Chestnut Avenue is located). Next to the water course (about 500 yards upstream from the Topsham Road) was the remains of an old barn, which must have been part of the farm too. Sadly, I don't think anything remains of it now.