0001593222 2025-10-16 2025-10-16 0001593222 us-gaap:CommonStockMember 2025-10-16 2025-10-16 0001593222 us-gaap:SeriesAPreferredStockMember 2025-10-16 2025-10-16 false 0001593222 8-K 2025-10-16 City Office REIT, Inc. MD 001-36409 98-1141883 666 Burrard Street Suite 3210 Vancouver BC V6C 2X8 (604) 806-3366 false false false false Common Stock, par value $0.01 per share CIO NYSE 6.625% Series A Cumulative Redeemable Preferred Stock, par value $0.01 per share CIO.PrA NYSE false