A man in his 20s was arrested after gardai discovered €166,900 worth of illegal drugs and €8,000 in cash in Lucan.
Officers on patrol stopped a car at around 9.15 am on Saturday in the west Dublin area.
A rucksack was found which revealed cannabis herb estimated to be worth €6,900, €4,000 in cash and drug paraphernalia.
A follow-up search carried out under a warrant revealed a further €160,000 in cannabis herb, €4,000 in cash, and other drug paraphernalia at a house nearby.
A gardai spokesman said: "The drugs seized will now be sent for further analysis.
"A man, aged in his 20s, was arrested in connection with the search and he was taken to Ronanstown Garda Station where he is currently detained under Section 4 of the Criminal Justice Act 1984.
"Investigations are ongoing."
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