If your talking about the Kenneth Bruce Bald comics it looks like Seaview to me.
Collinwood is actually all over the place in those comics. When they first started in March '71, it was Seaview, then it was some fantasy version of Seaview, then it was Lyndhurst, fantasy Seaview, Lyndhurst, fantasy Seaview, Lyndhurst, prophetically a house very much in the Tudor style of Greystone, Lyndhurst, and then who knows what after that because the newspapers in my area stopped printing the comics in November '71. Collinwood definitely had a HUGE identity crisis!