A former public toilet is being sold for £1m in Spitalfields, one of London’s trendiest shopping and nightlife areas.

The underground convenience has already been converted into a nightclub, albeit with room for no more than 60 customers.

It is being offered by an estate agent as a “charming and quirky premises” and a “unique restaurant/bar in the heart of Commercial Street”. Clarke and Lloyd property consultants are advertising it on their website as a “brilliantly situated … fantastic opportunity”.

Its price is more than three times higher than its value in 2000 when it was last believed to have been sold. The property comprises just 600 sq ft, which is about the minimum size of a newly built one-bedroom flat in the capital.

It is located in front of Hawksmoor’s grade I-listed Christ church at Spitalfields, east London, and opposite the market, which has been converted into an upmarket shopping destination.

A previous nightclub in the disused toilet, called Public Life, closed in early 2012 when the the London borough of Tower Hamlets revoked its licence.

A police raid the previous December had found a substantial quantity of drugs and 13 people were arrested for suspected drugs offences.