Letting Agent's fee near SE18

Letting agents fees in SE18 vary depending on the services and rent. 
The average rent per month in SE18 is £2,083. So a tenant finders fee for 60% of rent is £1,250. 
In SE18 a full managment fee for a property is between 10% and 20% of the monthly rental value, averaging between £125 and £250.
Renewal fees in SE18 are charged for renewing a tenancy agreement between the landlord and the tenant, ranging between £63 to £188.