Builth Wells railway station is just outside the town and offers good transport links. The Heart of Wales railway line also stops here and again at Climeri. For up to date information about the regular bus service have a look at Traveline Cymru. There are also plenty of local taxi firms that will be happy to help you reach your destination.
Builth Wells is a small town but has plenty of traditional, independent shops and a large spar supermarket to ensure that you have everything you need for your stay.