Pettit + Sevitt relaunched in 2009 under the directorship of Ron Sevitt’s widow, Val Sevitt, and her children, Colin Sevitt and Carol Perry.

Pettit and Sevitt incorporated design principles in their houses through simple lines, 'natural' features and an emphasis on functionalism. Because mass-produced, they were also able to offer the middle-class house purchaser an architect-designed house at a lower price.

At one stage Pettit + Sevitt was building 400 of Lowline houses a year with about 3,500 built in the 1960s and '70s.