Police mounted early morning raids in an attempt to quell the rising levels of crime in north Wembley.
Seven people were arrested in the Preston ward of the borough, as scores of officers targeted the homes of suspected drug dealers and counterfeit DVD suppliers.
Two separate raids took place on Friday last week, after officers were given a tip off that cannabis dealers were active in the area.
A 20-year-old man was arrested for possession of the class C sub-stance at a ground floor flat in Hirst Crescent, and later recieved a caution.
This was after burly officers from the Territorial Support Group took more than two minutes to break down the front door, which had three locks and a metal frame.
Officers say shortly after the raid a sniffer dog uncovered a cricket ball sized bag of cannabis hidden in a gutter in the car park outside the property.
Police have so far not linked the find to the address.
Another search warrant was executed at flat in nearby Lambert Walk, where officers discovered a stash of cannabis with a street value of more than £1,000.
They also found more than £1,000 cash, bundled up in plastic bags.
A 17-year-old youth was arrest for possession with intent to supply class C drugs and was bailed pending further enquiries.
Then at 6.45am on Tuesday, officers swooped on a bungalow in Elmstead Avenue, where they found 14 squatters and seized 2,500 pirate DVDs.
Two south east Asian men were arrested for copyright and distribution offences and another three men were arrested under immigration offences.
The series of raids were part of a week of action in north Wembley.
PC Simon Underwood, from Preston Safer Neighbourhood Team, said the move was a response to increased complaints from residents in the past three months.
"We have been receiving calls regarding anti-social behaviour, youth crime, drug misuse and dangerous dogs, so have pulled together all our resources and planned this week of action," he said.
"More than two weeks of planning have gone into it."
A briefing was held on Monday, where residents and councillors were told by police about the crime clampdown.
Over the next few days there will be extra patrols, and other Met Police units, including search teams and the mounted branch, are being drafted in to the borough to help combat anti-social behaviour and crime.
Resident Charlie Hankebery, 69, from Wembley, said: "It is nice to see them taking direct action and making the people who are causing misery drink from the cup of justice."