The House.... Spoilers Final Episode.
The house Mike and Fiona end up in in Ireland is the same house from that movie THe Holiday with Camron Diaz and Kate Winslet.
... End of line.
Good catch! Thought it looked familiar. Here's an interesting article on the "cottage".
https://movierealestate.wordpress.com/2009/04/19/movie-real-estate-the-holiday/