I don't know if you can share a house link. What I used to do was point out which rank it was in the top list. But if they can open your profile they can load your house from that.
When you select a castle in the city screen and on battle results there's a button (the last one I think) that will open the chat and ask in which channel to post it (world, kingdom, house, private message, etc).
Lastly, if you type "#" on the chat you will be able to type a city name and generate a location link for that. Very useful when trying to comunicate with chinese or others whose city names are not in english.