BASIS Independent Bellevue plans to open a dedicated lower school campus for kindergarten through fourth grade in fall 2027.

The approximately 30,000-square-foot building at 15760 NE 4th St. will sit directly across the street from the school's current campus, according to an Oct. 28 press release. Once the lower school opens, the existing building becomes the upper school for grades five through 12.

For families with younger children at the private school, the split means a separate building with spaces scaled to elementary-age students.

The two-story campus will hold 16 classrooms, a dining hall, an exercise room and dedicated spaces for music, performing arts, visual arts and engineering, the press release said. Outdoor areas will include a playground and a covered play area. The building sits on about 1.5 acres.

Rebecca Huang, the school's associate head of school, will lead the new lower school campus.

Toby Walker, vice president of BASIS Independent Schools, said in the press release that the expansion reflects demand for the school's program in Bellevue. He said the dedicated spaces for younger and older students will build on an approach that pairs academic challenge with what he called "the freedom to think boldly."

425 Business first reported on the expansion in early November. Applications for kindergarten through fourth grade for the 2027–28 school year are open, the school said.

The lower school is set to welcome its first students in fall 2027.