@Katherine Hyde - welcome to the group.
I don't know the exact year that Haig & Beatty road were built but I don know my granny Henderson and family, my mam's parents, lived in both. Our family has a written record, in the back of the family bible, that records my mam, born 1920 and her brother Martin, born 1921, were born in Carrs Buildings on the Glebe bank and the next 7 children were born in Haig Road and the first one recorded in Haig Road is Jane Anne (known as Jean) in 1923. The last sibling was born in Haig Road in 1937. The whole family had then moved to Beaty Road, a slightly bigger house, not longer after 1937.