Yes it is possible, we were on the ground floor and had a lovely room with a nice courtyard. When you book just request a ground floor room.
Word of warning, if mobility is in question, the hotel Centrale is located about halfway up the way up the
Freisa Lane, to get there they are lots of small stairs, not steep at all, just a gentle slope as with all the lane ways, they are all lined with little shops, restaurants and so forth.
Beautiful family boutique hotel, we stayed 3 nights and loved every moment. Would go back no hesitation.