Since then, he and the PAP team in Tampines GRC had won the subsequent five general elections (1991, 1997, 2001, 2006 and 2011) against the opposition Singapore Democratic Alliance and National Solidarity Party.

Excluding an uncontested walkover in 1997, Mah and the PAP team in Tampines GRC won with results of between 73.34% (in 2001) and 57.22% (in 2011) of the vote during those five general elections.

On 20 May 2011, Mah said at a Building and Construction Authority event that he accepted responsibility over public unhappiness due to a sharp increase in housing prices over the previous years.

[5] In a 2013 Chinese-language book published by the Hainan Culture and Heritage Centre, Mah refuted rumours that he had to step down because he had seemingly been blamed for growing public unhappiness over sky-rocketing property prices, claiming that he stepped down to make way for younger, talented people to take over.

[7] After retiring from politics in 2015, Mah was appointed as an independent director and non-executive chairman of Global Yellow Pages in September 2011.

[8][9] In November 2018, Mah joined Singapore-based fintech firm HydraX as an adviser and director, in addition to serving as chairman of GlobalCities Sustainable Investment.