Letting Agent's fee near S17

Letting agents fees in S17 vary depending on the services and rent. 
The average rent per month in S17 is £1,043. So a tenant finders fee for 60% of rent is £626. 
In S17 a full managment fee for a property is between 10% and 20% of the monthly rental value, averaging between £63 and £125.
Renewal fees in S17 are charged for renewing a tenancy agreement between the landlord and the tenant, ranging between £31 to £94.