Build to Rent (BtR) is big, and rightly so, given the potential it has to play in the housing market. Owner occupation has declined since the turn of the century, currently hovering at around 63% of all households, and the BtR sector has expanded, meaning that around 20% of UK households now live in a rented property. If this trend continues at the same rate, by 2040 the majority of us will be renting.