Begin with the two main pieces: (1) the front side of the kitchen (left) and (2) the back of the kitchen and the second side (right). Pre-fold all of the tabs by creasing them.

The pre-folded halves of the kitchen are shown below. Note that the tabs all fold inward (toward the interior of the kitchen).

Then use a glue stick to attach the front of the kitchen to the back half. Glue the tab at the back right side of the front of the kitchen to corresponding edge of the back of the kitchen.

Repeat the process to glue the tab at the back left side of the front of the kitchen to corresponding edge of the back of the kitchen. At this point, the front and back sides of the kitchen should be attached on both the left and the right side.

Now glue the tabs of the eaves of the front of the roof as shown below.

Repeat the process with the tabs of the eaves of the back of the roof as shown below. The back edge of the roof tucks into the body of the house like a box lid, and should also be glued to the body.