For Australia's National Rugby Championship, Houston was appointed to semi-final matches in 2014, 2015 and 2016 and was appointed to the final in 2017. He refereed the final of the 2015 World Rugby U20s and later that year refereed in New Zealand's ITM Cup. He was in charge of the Shute Shield grand finals in 2015 and 2016. Houston joined the Super Rugby referees panel in 2016. His debut match was on 19 March 2016 in Christchurch, with the Crusaders playing the Southern Kings.