From the 1930s Glynn saw expansion with many of the thatched cottages being replaced by modern family housing. The first phase was approximately 100 houses and bungalows at Glenvale Park, build in the 1940s. Then, in the late 1960s, eighteen houses were built at Glenside. These were followed by more houses and bungalows at Hawthorne Grove in the 1970s. All these properties were built by the government for renting.
Further housing development took place in the 1980s at Glenavon (known now as Glenburn) and in the 1990s at Craiganboy. The latter two developments were built privately for sale. It is estimated that there are now approximately 360 occupied dwelling houses in Glynn (April 2006).