Below is the link with how to get directions from Merignac (Mair-In-Yak) Airport in Bordeaux. For Driving. It is the shortest route by distance but not time and is preferable because it's a much easier drive for those unaccustomed to driving on the French autoroutes.
The address for the house is simply:
24480 Urval France
(Note: Please send no mail to French address)
In that order. There are no street names or numbers. The house is the house next to the stairs going up the side of the church. If you do take the autoroute (Peange means toll road). They take credit cards as do the gas stations. Gazole is diesel fuel.