The road measures 16.73 miles long and would take a car obeying speed limits 24 minutes to travel its length.
The B4356 is a B Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Llanbister, Llanbister Road, Llangunllo, Monaughty, Whitton, Discoyd, and PRESTEIGNE.
The road connects Powys and Powys.