Police have raided a home in Streatham Hill and seized a stash of cannabis and £45,000.
Officers also arrested a 53-year-old man and 50-year-old woman following the raid in Tierney Road on February 26.
Police said a number of small bags containing cannabis were found at the property.
The man was arrested for possession with intent to supply, while both were arrested for money laundering.
They have since been bailed pending further inquiries.
Detective Constable Wayne Dunleavy, from Lambeth police's newly restructured crime squad, said the cash seizure was "significant".
He also warned drug dealers they not only faced being jailed, but would also be stripped of their assets.
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