Aniston, 43, is in London filming a low-budget comedy drama "Miss You Already" and her representatives have been looking for homes for her, reported Sun online.
"She hasn't had anything to do with Brad since their 2005 divorce. But if they are both living in the same neighbourhood it could lead to awkward encounters," a source said.
Hollywood A-listers George Clooney, Johnny Depp and Sandra Bullock have had places in the same neighbourhood.
"Film stars like it because it is part of London yet has a country feel," it added.
Aniston divorced Pitt shortly after he worked with Jolie in "Mr & Mrs Smith". The couple had been married for five years.
Aniston is currently dating "Mulholland Drive" actor Justin Theroux. PTI CORR NDS
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