Police have seized a number of cannabis plants as well as hydroponic growing equipment after raiding a house in Narrabundah.
The raid was executed around noon on Friday after an anonymous tip from a member of the public.
"Police discovered three large mature cannabis plants growing in a shed with the roof removed, in the rear yard," ACT Policing said in a statement.
"A hydroponic setup was also located in one of the bedrooms which contained 20 small cannabis plants and one kilogram of dried cannabis."
Police said they had seized the drugs and hydroponic equipment and investigations were ongoing.