In 2020, Nitro North and South were completed and added to Amazon’s South Lake Union (SLU) campus. The 24-story tower (Nitro North) includes over 650,000 sq ft. of office development and 4 floors of below-grade parking. The 8-story building (Nitro South) houses Mary’s Place, a local shelter supporting women and families, plus office and meeting spaces. The development will host at least 10 retailers at the ground level. The towers are linked by a 2-story skybridge, which includes seating areas and a rooftop deck for overlooking the significant public open space incorporated into the block.

Project Highlights
• Integrated Tenant Improvement Design and Construction: Tenant Improvement (TI) and Shell and Core (S&C) design were concurrently completed by two distinct architects. The design process and construction schedule for the TI and S&C were highly integrated to deliver the complete project on time and under budget.
• District Energy: This building is part of a district energy system that utilizes excess heat from a nearby data center to heat the building, thus reducing carbon emissions.
• Mary’s Place: Nitro South houses an 80,000 SF shelter supporting women and families, next to Amazon office space and retailers, providing both privacy and access to its guests. This is the first known inclusion of a shelter in a commercial office tower.

  • Seattle, WA
  • 717,000 square feet of office space
  • 31,000 square feet of retail
  • 83,000 square feet devoted to Mary’s Place
  • 879 underground parking stalls
  • 2020
  • Site Selection
  • Due Diligence
  • Entitlements – Alley Vacation, Master Use Permit (MUP)
  • Permits and approvals
  • Architect, contractor and other consultant selection and management
  • Design and construction management
  • Scheduling
  • Budget and cost control
  • Furniture, fixtures and equipment coordination
  • Retail Coordination
  • Support of transition to operations
  • Seneca Group, Development Manager
  • Graphite Design Group, Shell and Core Architect
  • SABArchitects, Tenant Improvement Architect
  • GLY Construction, General Contractor
  • Benjamin Benschneider, Photography
  • 2023 AIA Honor Awards for Washington Architecture
  • 2023 Council on Tall Buildings and Urban Habitat (CTBUH) Equity, Diversity & Inclusion Award