The singer is house-hunting in the capital for a place to live from May until July, The Sun reports.
She will be filming a reality show for Sky Living alongside Girls Aloud's Nicola Roberts, which is based around aspiring fashion designers.
A source said: "Rihanna is coming back to Britain to shoot her Sky Living reality show and has decided to settle down a bit while she's over. Although there may be occasional trips away she'll be based in London.
"Rihanna has instructed her team to find a mansion in or around the capital."
Rihanna was reportedly flat-hunting in East London earlier this year, but is now said to be looking elsewhere and seeking gated accommodation for added security.
She will play her only live UK date of 2012 at London's Wireless Festival on July 8.
Watch the video for Rihanna's 'We Found Love' below: