Erwood is a village in Powys, Wales.
It is situated within the LD2 postcode district, which is within the Builth Wells post town.
LD2 is the only postcode district within the Builth Wells post town.
The Builth Wells post town is within the Llandrindod Wells postcode area.
Administrative Ward: Bronllys
Administrative District: Powys
Country: Wales
UK Parliament: Brecon and Radnorshire