In "The Kink in Foggy's Niblick", I took the reference to the landlady's stuff stored in the attic as a slip-up resulting from the sudden need to write Blamire out of the scripts and Foggy in. Blamire had roomed with a lady at the intersection of The Royds and Cartworth Road, who had his tea ready promptly at 5:00 every afternoon (and Heaven help him if he was late coming home for it!). It would make sense for the attic to be full of her stuff.
Since LOTSW is light viewing, therefore thought to be ephemeral, we probably weren't expected to notice the different locations of Foggy's house. Anyway, he probably sold the "house in Arnold Crescent" when he moved to Bridlington to claim his inheritance of the egg-painting business. That makes sense of the different location(s) after he returned to Holmfirth.