Hailing from Oslo, Parr started his professional career with the local team Lyn, where he made his debut in Tippeligaen.
Parr transferred to the Championship side Crystal Palace in July 2011 and was a part of the team that won promotion to the Premier League in the 2012–13 season.
On 16 July 2011, Aalesund agreed a fee for Parr to transfer to London-based Championship side Crystal Palace, subject to a medical.
[1] Three days later, Crystal Palace confirmed that Parr had signed a three-year deal for an undisclosed fee.
[3] On 12 May 2012, he was voted Crystal Palace player of the year for the 2011–12 season, due to his work-ethic and his great fitness.
After Freedman's acrimonious departure from Selhurst Park in October, Parr's place in the starting XI was never under threat.
The Eagles beat Watford in the promotion-playoffs finals to return to the English top tier after an eight-year absence.
[4] Parr got his Premier League debut for Crystal Palace on 21 December, replacing left-back rival Dean Moxey at half time in the match against Newcastle United.
[8] He made his first appearance of the 2015–16 season on 15 September, featuring as a second-half substitute in a 0–1 away win over Leeds United at Elland Road.