Officers from the Operation Scorpion* team entered the property, on Parnell Close, at 8am to make a search under Section 23 of the Misuse of Drugs Act 1971.
Also in attendance was the Abbots Langley and Rickmansworth Safer Neighbourhood Teams.
Both the Class A (cocaine) and the Class B drugs (cannabis) and paraphernalia which suggested dealing activity.
Three people, a 23 year old man, a 42 year old woman and a 15 year old male, all from Abbots Langley, were arrested in connection for drug offences during the operation on Friday (16 July).
The woman was later released without charge, but was was given a community resolution order for the possession of cannabis.
The 15 year old male was also released without any charge for suspicion of possession or supply of drugs.
Operation Scorpion PC Honor Greaves, who led the operation, said: “We will never stop pursuing those who supply drugs and commit crime in Hertfordshire, because everyone deserves to live in a place where they feel safe.
“This warrant was carried out after we received intelligence from members of the public asking us to combat drugs and associated criminality in the area.
“This type of work helps us gather evidence and intelligence to infiltrate and disrupt wider criminal networks, and we will not be deterred from carrying out this kind of action wherever necessary.
“We want this to serve as a warning to anyone who is involved in drug crime in this county – we will catch up with you eventually.
“We’re asking residents to help us help them – tell us if you have information. We want to hear from you so we can improve your quality of life in your neighbourhood.”
The operation is the latest in a line of proactive measures by police in their aim to combat crime and anti-social behaviour in Three Rivers.
Last month, the district’s Community Safety Unit achieved a partial closure order on a property on Springwell Avenue in Mill End after reports of suspected drug activity and associated anti-social behaviour which led officers to conduct a drugs warrant.
Under the Anti-Social Behaviour, Crime and Policing Act 2014, the subsequent closure order states that no one besides the three occupants, the emergency services, the council or companies directed by the council can enter the property.
In addition, all three residents were issued with Community Protection Warnings which state that no drugs or drug paraphernalia must enter the property, and that no loud noises should emit from the address after 9pm each night.
If you have information about suspected drug activity in your community, you can contact police.