On leaving Samui Airport, by Taxi or Hire Car, you will first see on your left hand side a shop with big metal statues, go straight ahead (don't turn right at the exit to the airport) follow that road for about 2Km you will then come to a wall covered with a long picture of sun, sea & sand, follow that road with the wall on your left hand side, stay on that road for another 2Km and you will eventually come to a T Junction, at that T Junction you will have a small hotel/shops on you right hand side & the local Thai Market straight ahead of you
Take a right there so that you have the local Thai Market on your left follow that road, you will pass the BBC Restaurant & also the opening to Big Buddha on your left, stay on that road (4171) you will come to a sharp right hand bend a few hundred meters on you will come to a few local shops/restaurants/convenience stores.
Follow that road for a few hundred meters more and you will see a restaurant named English Kitchen, on your left, you will then go round a slight right hand curve, slow down here look for a wooden sign (Samui Sanctuary) (don't go past the garden center on your left) where that wooden sign is the opening to (Samui Sanctuary) sign post overhead
Enter there, you will have a white painted wall on your right & local Thai houses on your left, slowly follow that road (sharp right) then (sharp left) and that is you into the cul-de-sac of (Samui Sanctuary), you will see 2 storey villas on your right slowly go past them, you will then see 3 storey villas next, my one (Villa Catherine) is the 3rd one up on the right