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Hey There, Without diving too deep into your particular situation I can say: I'd redirect and relevant pages to new relevant pages if applicable.  Beyond that I'd either redirect to corresponding categories, or just to the home page with possibly some sort of explanation on the change.  As I said I'm not totally familiar with the change from cabinets to bathrooms so it'd be up to you to decide how to explain that to your customers. Honestly, I personally wouldn't let old URLs with links and traffic 404 on the old domain.  I'd redirect them somewhere hopefully relevant.  If not, the homepage works but I wouldn't expect a lot of value there anyway if the traffic/links aren't relevant. As far as the Moz errors I can see why the crawler is confused with all of this jumping around.  That will continue until you decide on a single domain. I guess I'm just not understanding what your plan is.  If you're redeveloping this old URL then just leave the URLs for now and build them out later.  If you're consolidating onto a new domain and abandoning the old then redirect relevant pages to new pages and/or the homepage if nothing else.  If there are no links or traffic then I wouldn't worry about it much at all anyway. Hope that helps and GL! Jacob