The address in Caledonian Road, N1, was searched under the Misuse of Drugs Act by Caledonian Safer Neighbourhoods team with assistance from the MPS Dog Support Unit in response to community concerns about drug dealing at the address.
Police drugs dog Diesel assisted officers in the search. A large amount of cannabis and £4,500 in cash was discovered.
A 20 year old man was arrested on suspicion of possession with intent to supply and has been bailed to return to police on 15 October.
Police Sergeant Michael Atkinson, from Caledonian SNT, said: "Drugs taking and dealing is one of our ward priorities. We take complaints from residents very seriously and will continue to work towards reducing this menace. I am pleased that we have been able to take these drugs off the streets of Islington."
Police Constable Adele Gibson from the Dogs Support Unit said: ”Our drugs detection dogs are specially trained to proactively assist search teams during raids and this is a good example of two teams working in partnership to tackle crime.”