The Cardinal Union Building [CUB] project is Phase 2 of SAAS’s five-year Master Plan to expand and renovate the campus. The new five-story, ground-up CUB is home to SAAS’s middle school program and features classrooms designed for Grades 6-8, spaces that support the middle school students outside the classroom, a foreign language and music center for both middle and upper school students, community areas including a lunch/learning commons and servery, administrative space, a gymnasium, a rooftop outdoor play space, a rooftop exterior space and one level of underground parking.


Seattle Academy


LMN Architects


87,000 SF building | 22,000 SF garage

Year Completed


News + Recognition


2021 AIA Awards

Interior Architecture

Approach Spotlight

Sustainability Features

  • Low VOC flooring
  • Low VOC paint
  • PV cells on roof
  • Portion of harvested rain water diverted to planter area
  • Natural ventilation with operable windows and ceiling fans in most spaces
  • Green roof
  • Radiant ceiling panels
  • Piping for future Rain Water Cistern installed