The fifteenth season of Australian reality television series The Block premiered on August 4, 2019, on the Nine Network.

In June 2018, it was reported that The Block producers had acquired a rundown backpackers accommodation, Oslo Hotel, at 38 Grey Street, St Kilda, through an off-market deal struck after the series approached one of the owners.

The series producers and building planners set to submit renovation plans to the City of Port Phillip council imminently.

[3][4] In October 2018, the Oslo Hotel was confirmed as the next location for renovation, Nine Network acquired the building for $10.8 million.

[6] The Block auctions (or Block-tions) for the houses were held on Saturday, 9 November 2019,[7] with the final episode of 2019 airing the next day on Channel Nine and 9Now at 7:00pm (ADST) on Sunday, 10 November 2019, including a 'In memory of' tribute to Peter Elliott (Peter Elliott Roofing).