Plans to transform A-listed Castle in Dumbarton into holiday accommodation If approved then the plans would see the 14 bedroom mansion modernised and made available for single let holiday rentals. Dalmoak Castle near Dumbarton could be transformed into an exclusive holiday rental. (Image: Lennox Herald) Get the stories that matter to you sent straight to your inbox with our daily newsletter.Invalid EmailSomething went wrong, please try again later. Subscribe When you subscribe we will use the information you provide to send you these newsletters. Sometimes they’ll include recommendations for other related newsletters or services we offer. OurPrivacy Noticeexplains more about how we use your data, and your rights. You can unsubscribe at any time.