The rapper and producer, who rose to fame in N-Dubz along with Tulisa and Dappy, made the announcement in a video posted to YouTube this week (5 February), which coincided with his 27th birthday.
In the video, Richard looks back on photos of N-Dubz before putting them in a box and sliding it under a bed.
He then walks out into the corridor, cuddles his daughter Ava, and opens a door where screaming fans are heard, before saying: "I'm Richard Rawson."
Celebrity Big Brother star Dappy was one of the first to tweet his support, saying: "Happy Birthday @ImRichardRawson sick video. Can't wait for everyone to hear ur new music #ImRichardRawson."
Professor Green and Tom Parker also tweeted similar messages of support.
Fazer's new chapter comes just a week after he promised fans that N-Dubz will return to the stage some day after the group went on a hiatus in 2011 to pursue personal projects.
Fazer said at the time (30 January): "We will bring it back!!! Few more things to achieve on our own 1st!!"
It is thought that Fazer will release a single with The Wanted star Tom after the pair collaborated in the studio together last year.
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