Letting Agent's fee near DE15

Letting agents fees in DE15 vary depending on the services and rent. 
The average rent per month in DE15 is £1,208. So a tenant finders fee for 60% of rent is £725. 
In DE15 a full managment fee for a property is between 10% and 20% of the monthly rental value, averaging between £73 and £145.
Renewal fees in DE15 are charged for renewing a tenancy agreement between the landlord and the tenant, ranging between £36 to £109.