Letting Agent's fee near SG1

Letting agents fees in SG1 vary depending on the services and rent. 
The average rent per month in SG1 is £1,640. So a tenant finders fee for 60% of rent is £984. 
In SG1 a full managment fee for a property is between 10% and 20% of the monthly rental value, averaging between £98 and £197.
Renewal fees in SG1 are charged for renewing a tenancy agreement between the landlord and the tenant, ranging between £49 to £148.