Police and advisor Art Recovery International are appealing for information leading to the recovery of the items.
The six pictures and two sculptures were taken on two occasions on March 26 and April 18.
Anyone with information should call 101, or Crimestoppers anonymously on 0800 555 111, quoting crime reference number 190000196521.
A reward is being offered to recover the objects.
Among the stolen artworks were two sculptures by Scottish artist William Turnbull (1922-2012) (pictured).