He appears in the 1871 census (not typed up on the site yet!) as the youngest child of the family:
The property is just listed as Thurlow Road, which is the road that leads from Carlton Green to the Thurlows (Gt & Lt), it is unlikely that this house still exists - the 1910 land tax map shows a group of cottages (probably for workers) in Thurlow road which have since disappeared (the Farrows are not listed as living there then though - hardly surprising since they'd be 87!).
It is possible (but unlikely) that it referred to one of the few (still remaining) houses on the Carlton road.
In 1881 William Farrow was 17 and living (unmarried) with his parents in
Carleton Green, he was now listed as an agricultural labourer. His mother's
birthplace is now given as Mathwold, Norfolk (I'll have to look these up on the
map to see if they are
In 1901 his parents were still listed living in Thurlow Road (presumably the
same house), but William has left.