Born in Hertfordshire in 1968, Grant was educated at Watford Grammar and Cassio College Watford, before studying Business and Finance at Manchester in the late 1980s.
In 1990, he founded his own printing company at the age of just 21. PrintHouse Corporation grew into a commercial design, print and web development company with clients throughout the UK and the rest of the world.
In the 1997 General Election Grant challenged the Liberal Democrat Simon Hughes MP in his North Southwark and Bermondsey seat.
In 1999 he was selected as Conservative candidate for Welwyn Hatfield, In General Election of 2001, he produced one of the best Conservative swings of the election, slashing Labour's majority from 5,595 to just 1,196.
Grant became MP for Welwyn Hatfield at the May 2005 General Election with a majority of 5,946. The 8.2% swing was one of the biggest nationwide.
In May 2010 he was re-elected with a majority of 17,423. The 11.1% swing was once again one of the largest national swings to the Conservatives in the country.
In December 2005 he was appointed as a Vice Chairman of the Conservative Party with responsibility for campaigning. In July 2007 he was promoted to Shadow Housing Minister. After the May 2010 election, Grant became Minister of State for Housing and Local Government, and was sworn of the Privy Council.
In September 2012 Grant was appointed as Chairman of the Conservative Party and Minister without Portfolio.
Grant is married to Belinda and lives in Welwyn Hatfield with their children Hadley, Tabytha and Noa.