The phase B1 occupation overlies the earlier phase A deposits. The Local Late Chalcolithic ceramic assemblage are now evolved forms of the earlier pottery. "True" hammerhead bowls appear along with new forms of "casserole" cooking pots. The site shows increasing evidence for architectural diversity and large-scale special purpose buildings in addition to regular houses. Stamp seals and seal impressions show a continuation of the glyptic tradition from phase A. Copper metallurgy and long distance exchange of prestige goods continue at the site.
At the beginning of phase B1, the north end of the site (area A) was transformed into a special purpose area consisting of a monumental stone platform 2.8 m. high. A large open area was created to the east and northeast of the platform through the construction of two massive stone terraces. The platform may have been either a ritual structure or possibly an elite residence.
In the uppermost deposits of phase B1, bevel rim bowls begin to appear, suggesting the onset of some limited contact with southern Mesopotamia, and , foreshadowing the widespread appearance of a full range of Uruk material culture in the following phase B2..
At the south end of the site, in area B, a large stone and mud brick platform was constructed inside the monumental stone niched enclosure wall, which remained in use. Outside this enclosed area, a series of small mud brick houses were constructed. At the west end of the site, in area C - two mud brick houses were constructed on top of the earlier phase A narrow stone storerooms. Area B: Op. 11 mud brick and stone platform 111. Area C: Op. 5 remains of two adjacent mudbrick houses dating to phase B1.
