For anyone's interest there have been a number of Tolkien items sold on the site, and using the
http://www.rrauction.com/past_auction_results.cfm link you can seach "tolkien". There was a letter you'll see sold in June with his son's current address on the letterhead.
I happened to search the house address and an exact match was returned; the building had planning permission in October of 2002 to be turned from a hair salon into a day nursery. Curious detail (if it is the very building)