Dozens of cannabis plants have been found growing in "sophisticated" set-ups inside the bedrooms of a Canberra home, police say.

Officers discovered the equipment inside a house in Aida Ball Circuit at Forde on Wednesday evening after responding to a report that a garage door was open.

Criminal investigators executed a search warrant after officers smelt cannabis in the area.

Officers allege they found about 30 mature cannabis plants growing under a sophisticated artificial set-up in a bedroom, and more than 70 seedlings inside a grow tent in a second bedroom.

Police said the set-up included lights, irrigation systems on electric timers and air filters.

They have not made any arrests and have appealed for public information.