[8] One of the duo's earliest TV projects was the Million Pound Property Experiment which originally aired on BBC Two in the United Kingdom in 2003.
The show followed McAllister and Ryan as they renovated and resold properties, starting with £100,000 and aiming for a final sale of £1 million.
[17] Other TV appearances included presenting STV's 2008/2009 Hogmanay Stories, shopping centre challenge concept Colin and Justin's Home Show, and guesting as Ugly Sisters on the Ant & Dec 2009 Christmas Special.
[18] From January 2011, Colin and Justin, amongst others, took over as presenters/decorators of 60 Minute Makeover on ITV1 and fronted 24 episodes, following the departure of previous host Terri Dwyer.
Colin and Justin took on the role of judges in shows such as Canada's Game of Homes, Australia's The Block and Reno Rumble.
The Million Pound Property Experiment – published by BBC World Wide in 2004, which went on to win the People's Choice Lifestyle Book of the Year with WH Smith.