Nine police stations may to be sold off by the Metropolitan Police in an effort to save money.
Barking, Sidcup, Willesden Green, Orpington, South Norwood, Ealing, Highbury Vale, East Ham and Richmond stations are under threat.
The Conservatives say many stations are inefficient or underused - but Labour pointed out some police counters are overly busy.
A firm plan on which police stations are to close is expected by the autumn.
Mary MacLeod, Conservative MP for Brentford and Isleworth, said: "We don't know yet whether they're going to close or not.
"This [review] is overdue, because we do have 800 buildings on the police estate and many of them are under-utilised, inefficient, not suitable for modern-day policing."