On the Block: The new couples

The Block candidates Alex and Corban.

Eight contestants line up for TV show that challenges them to show their skill and imagination at renovation.

The four couples competing in the third season of The Block have been revealed.

The teams made their debut in an advertisement for the series screened on TV3 last night, while Facebook pages for each couple also went live.

The four teams come from south and west Auckland, Feilding and Christchurch.

West Aucklanders Alex, 29, and Corban, 32, have been married for a year and a half, and Alex has promised to bring some music to the show, saying she "sings opera when she's tired".

Jo and Damo.

Feilding couple Jo, 34, and Damo, 36, said they were into tools, with "crafty" Jo saying her talent was being about to turn "something horrible into something amazing".

Quinn, 26, and Ben, 30, from Christchurch, said they knew "nada" about renovating a house, but knew the trick of the game was to "do it better".

Quinn and Ben.

South Aucklanders and high school sweethearts Maree, 27, and James, 28, have been together for 13 years.

Maree and James.

In this year's series each team will renovate and auction one of four houses in Pt Chevalier.

Judges Mark Richardson and Shannon Ryan will be joined by two new judges, Shelley Ferguson and Mark Gascoigne.

On the Facebook pages for each of the teams that went live yesterday, Jo and Damo were taking the early lead on social media, earning more than 200 likes within an hour.

Last year's winners, Alice and Caleb Pearson, walked away with $261,000.