Built in 1879 by David Walker of Liverpool for Pryce Jones, founder of the world's first mail order business in 1859. The initial building was added to in 1886-87, and a large new wing erected towards Kerry Rd in 1901. This included a post office to handle the immense volume of orders. Transverse beams on plain cast iron columns.
Source: Cadw listing description.

Work began on the new wing of the building in 1901, and was completed in 1904. A footbridge was constructed connecting the Royal Welsh Warehouse with Agriculture House (NPRN 32018, another Pryce Jones building) across Station Approach at the 3rd floor level. This footbridge was apparently demolished in 1951.
The building remains in use as a department store.
T.J.Pert, RCAHMW, 23/05/2006.