One day after midfielder Jim Whitley returned to Maine Road after a loan spell at Norwich, Man City again turned to Norwich's assistance loaning them Danny Granville due to Norwich's lack of cover at left back. He made his debut against Tranmere on 4th November and made a total of 6 appearances before returning to Manchester where he forced his way back into the first-team (19 appearances) Danny was also linked with a transfer to Bradford City (Sport First 17th December 2000).

Danny began his career at Cambridge and spent spells at Chelsea and Leeds before joining Man City.

Danny returned to London in December 2002 to join Crystal Palace for £500,000. In July 2003, he was transfer-listed by Palace along with Ade Akinbiyi. Recovering from injury, mere weeks after making a comeback for Palace's reserves, Palace manager Steve Kember revealed in mid-October 2003 that he expected Danny to depart Selhurt Park soon and that tentative enquiries had been made by other clubs.

Under Iain Dowie, Granville restored his place in a Palace side that shot up the table towards the play-offs. He played in Palace's 3-0 win over Sunderland on 21st April 2004 - Sunderland's defeat meaning Norwich were guaranteed a place in the Premiership. Palace themselves then won promotion via the play-offs.

Following Palace's relegation at the end of the 2004/5 season, Danny was out of contract and was linked on June 27th with a move to Ipswich Town. In the end, he signed a new two-year contract with Palace.

Danny was released by Palace at the end of the 2006/7 season. He signed for Colchester United at the beginning of July 2007 and replaces left-back Chris Barker, who was on loan at Layer Road last season but has since joined QPR. Unfortunately for Danny, Colchester were relegated back to League One on 9th April 2008

In May 2008, Colchester announced that they would not be renewing Granville's contract for the 2008/9 season. He was quickly linked with a move to Leyton Orient which became true on Thursday 5th June 2008 with Danny signing a one year deal. Granville said: "I've been keeping my eye on Orient for the last year because I spoke to the manager last summer."

Danny was released by Orient at the end of the 2008/9 season. He made 15 appearances for Orient

Danny then signed for Hemel Hempstead Town

As of November 2018, Danny was teaching in primary schools in Hertfordshire and doing some part-time coaching for Arsenal's academy.