Multi-generational households are the fastest growing type of living arrangement in Canada, with nearly one-million households in 2021 having multiple family generations living under one roof. In fact, a renovation tax credit aimed at boosting the number of multigenerational homes in Canada is estimated to cost the federal government roughly $44 million over the next five years, according to the parliamentary budget officer (PBO). As Anne Gaviola explains, there are cultural and financial reasons behind the rising popularity.