The Houses on Via dei Vigili are two medianum-apartments from the Hadrianic period, to the east of the Baths of Neptune. The rooms received light through many windows in the west facade, along Via dei Vigili. Both apartments were entered from a single, central corridor. From thresholds with pivot-holes can be deduced, that the internal staircases at the end of the corridor led to independent apartments on the upper floors, as did a staircase opening on Via dei Vigili. Below the internal staircases were latrines.

Each apartment covers an area of approximately 150 square metres. The ceiling was at a height of 3.90 metres. There are a few remains of black-and-white floor-mosaics, and of paintings with red and yellow panels.