It is an open plaza that adjoins Plaza B and faces the southern part of the great capital, Monte Albán.

Kiln area: The discovery of a kiln made of adobe and stone for firing pottery, and next to it a variety of large pots, shows one of the exclusive activities of the inhabitants of this residence. The kiln, whose firing grates are intact, is identical in shape and size to those used to this day in Atzompa, which allows us to document the historical continuity of ceramic production, as it seems to have been a long family tradition that began in pre-Hispanic times. A recreation is presented, since the original finding is 2.5 m deep.

East and West Residences: They are considered the service area of the House of Altars, since in addition to being located next to it, evidence of intense domestic activity was found; the architecture and finishes are of lower quality than those of the Great Residence. These are square spaces around a small central courtyard. The amount of ash and charcoal found indicates that these places were used for food preparation, probably for the main house.

Las Canteras: The Oaxaca Valley region has large concentrations of sedimentary deposits beneath the surface. This situation was taken advantage of by the builders to exploit the outcrops of bedrock, that is, from the hill itself. The rock that was extracted was used as raw material to build the cores or internal parts of the buildings, thus giving them greater support.

Unlike other ancient cities, Monte Albán and Atzompa had rocky outcrops nearby, so they were able to expedite the extraction and transfer of the stone to the place where it would be used, thus reducing construction time and human effort invested. All the work involved in the extraction, carving and transfer of the stone was the reason for a special organization in guilds controlled by the Zapotec state.