Building I,IV,1 is a row of Hadrianic shops (opus mixtum) to the east of the garden in the centre of the Insula of the Paintings. Between the shops are three external staircases, that were accessed from Via dei Balconi.

At the north end, on the street, is a public, covered water basin. Behind it, in the west facade, is a terracotta relief with carpenters' tools.