Scott Cam returned as host as did John McGrath & Neale Whitaker as judges and Shelley Craft joined the season as "Challenge Master".

[1] The season premiered on Monday, 20 June 2011 at 7:00 pm.

Unlike previous series, the fourth season was filmed in Melbourne rather than Sydney,[2] with the four houses to be renovated located in the inner-city suburb of Richmond.

[3] The season was ultimately won by Polly Porter and Warwick "Waz" Jones, who were the only couple to sell their property at auction.

[4] The Block: Unlocked is a new format hosted by Shelley Craft which shares a personal insight into The Block transformations as the couples guide us through their completed rooms, it also includes behind the scenes footage and footage not seen on TV.