One was a property owned by an arrested person and rented out to tenants, he said.
The Road Knights's headquarters in Balmoral Dr, South Invercargill, was not seized, he said.
Collectively, the properties and motorbikes were worth hundreds of thousands of dollars.
The properties and motorbikes are now owned by the official assignee and there will be civil court proceedings to decide whether they are retained by the Crown.
The arrests concluded a 10-month investigation called Operation Crimson, which targeted the Road Knights and their criminal activities, Det Snr Sgt Inglis said.
Eleven people appeared in the Invercargill District Court yesterday following the raids. All were granted name suppression and bailed to reappear on January 28. They did not enter pleas.
Ten from Invercargill faced a raft of drug charges, while one man with a rural Southland address faced drugs charges and a firearms charge.
Several defendants were jointly charged with others in varying combinations.
Det Snr Sgt Inglis told the media briefing police still had to make a few more "mop up arrests", and investigations were continuing into the theft of insulation batts from a Government-subsidised home insulation scheme in Invercargill.
The operation, run jointly by the Invercargill and Southern District Police organised crime squads, assisted by the police national asset recovery unit, "again highlighted the links between organised gangs and drug dealing", he said.
"Police will continue to be relentless in targeting criminal gangs, which attempt to fly under the radar and cause a significant level of harm in our communities.
"Their ill-gotten gains in the form of huge profits are at the expense of the welfare of our communities, and our young people."
As part of Operation Crimson, police and customs had in July and August intercepted 1kg of the drug Pentedrone, an analogue of Ecstasy, with a street value in excess of $125,000, he said.
A 29-year-old Dunedin man linked to the Road Knights and a 42-year-old man and 50-year-old woman, both from Balclutha, were arrested and charged in August.
Those who appeared in court yesterday were:
• Woman (78): Two charges of offering to sell cannabis to people over the age of 18.
• Man (76): 41 charges including manufacturing and supplying cannabis oil, possessing cannabis, selling cannabis and possessing BZP.
• Woman (47): Five charges.
• Man (43), freezing worker: 34 charges.
• Woman (42), sex worker: Four charges.
• Man (41): Six charges including possessing a high-calibre rifle.
• Man (40), freezing worker: Three charges of importing pentedrone.
• Man (35): 27 charges.
• Man (28): Four charges.
• Woman (25): 32 charges.
• Woman (22): Four charges.
Ten-month operation targeting Invercargill-based Road Knights motorcycle gang.
Events yesterday:
• Searched: 14 properties in Invercargill, Alexandra, Roxburgh and Moa Creek area
• Seized: $38,000 in cash, large quantities of cannabis, BZPs and ecstasy ingredients.
• Restrained: Cash, drugs, seven houses and two motorbikes under the Criminal Proceeds (Recovery) Act 2009.
• Charged: 17 people on 195 charges including drug dealing, possessing firearms, cultivating cannabis.
• In court: 11.
In total:
• Arrests: 20.
• Seized: Drugs with estimated street value of $160,000, a sawn-off pistol and high calibre rifle.
• In past two months: Three indoor cannabis growing operations of more than 100 plants located in Invercargill.
