A slip form assembly includes a lifting pole extending in a longitudinal direction and an inner form slidably coupled to the lifting pole and extending in a lengthwise direction perpendicular to the longitudinal direction between a first end and a second end. The first end is configured for end-to-end contact with an adjacent end of an adjacent inner form. An outer form is slidably coupled to the lifting pole opposite the inner form and defines a cavity for casting a portion of a wall therebetween. The outer form extends parallel to the inner form between a first end and a second end. The first end of the outer form is configured for end-to-end contact with an adjacent end of an adjacent outer form. The inner form and outer form are moveable along the lifting pole longitudinally relative to the respective ends of the adjacent inner form and outer form.