Dog friendly self catering with a difference! You can stay in Craig Y Nos Castle Self Catering Nurses Block at Penycae/Abercrave on the edge of The Brecon Beacons National Park. As the name suggests the accommodation was formerly for nurses when the castle (hotel) was a hospital. You and your dog will have access to the grounds with longer walks from the door and you have the benefit of the hotel bar and lounge too.
The Nurses Block has ten double rooms and one single room. Showers and loos are at one end. A disabled bathroom is at the other end. In the middle there is a large-ish lounge with a small galley kitchen opening on to the lounge.