[1] Hosts Scott Cam and Shelley Craft, Dan Reilly takes over being site foremen from Keith Schleiger as he was unable to move to Phillip Island full time, and judges Shaynna Blaze and Darren Palmer, all returning from the previous season, with Marty Fox taking over judging from Neale Whitaker.

[2] Applications for the twentieth season of the series opened in September 2023 until 15 October 2023, looking for couples aged between 18 and 65 years old being sought by casting agents.

[14] In May 2024, foreman Keith Schleiger announced he would be drawing back his appearance to guest this season due to family commitments.

[17] During the fifth week of filming, Jesse & Paige decided to leave the competition based on advice from the series psychologist, and a new team will take their place with already 4 rooms complete.

[18][19][20] Former contestants Ronnie and Georgia filled their place for one day as a prank before Maddy and Charlotte, sisters and home flippers from New South Wales, joined The Block in the following episode.