The landlord says two tenants can live in the unusual south London property and as well as the staggering rent, they must also pay a £1,615 deposit.
The fire is reported to have broken out early on Wednesday evening on Treforest Industrial Estate in Rhondda Cynon Taf, South Wales and is still raging, according to witnesses.
Paul Jellyman, who tends the Monarch private bolthole Ray Mill, applied to carry out works to nine trees in the conservation area.