House at Lanzéo 4 is not marked. The road marked as a red dotted track to left of 'road' is actually paved. House at Lanzéo 4 sits on left at end of track (which is actually paved, not a track). The two nearest buildings to this spot no longer exist - one was a shed, and one a barn. Both have now been removed.
The paved road past Lanzeo 3 curves down to the left (marked as dotted red track) to Lanzéo 4. This road does not continue in a paved line from the junction with the 'track'. The road which continues in a straight line from the juction after Lanzéo 3 is actually an unpaved road.