Airport Way Center Renovation and Addition
City of Seattle
Seattle, WA

LEED Gold and Silver-Certified

2006 American Council of Engineering Companies’ Washington State Chapter Gold Award

The mechanical and electrical design resulted in using 49% less water and 34% less electrical energy.


Wood Harbinger provided the mechanical, electrical, security, and technology engineering design and construction administration for the renovation and adaptive reuse of two buildings totaling 202,000 SF. The two buildings, Building A and Building C, are occupied by the Seattle Police Department. Approximately 25,000 SF on the first floor of Building A was renovated. For Building C the entire building was renovated. The first floor of Building C is 125,000 SF and functions predominately as storage for merchandise and automobiles. The 53,000 SF second floor was configured into office space. The renovation earned a LEED Gold rating from the U.S. Green Building Council for Building C and a LEED Silver rating for Building A.

The site has spring water constantly flowing into it from Beacon Hill. About 5-10 feet below grade, the water stream is so strong that 6 to 60 gpm had to be pumped out of the lower level of Building A to keep it from flooding. Instead of pumping it into the storm drain, Wood Harbinger designed a water reclamation system to use this water for flushing urinals and toilets, landscape irrigation, and vehicle wash operations. This system saves over one million gallons of municipal water and diverts over one million gallons of sewage water per year.

A displacement ventilation system delivers air conditioning to second floor offices and other second floor spaces in Building C. This system has several advantages over traditional overhead systems, including improved thermal comfort, improved indoor air quality, and reduced energy use. The HVAC system discharges waste heat into adjoining interior parking areas, eliminating the need for temporary winter parking heating.

Other LEED measures that were studied include photovoltaic power panels and wind power. The studies determined that not enough power could be generated to justify either of these options.

This project has received both LEED Gold and Silver Certifications by the U.S. Green Building Council and has won numerous awards, including the 2005 Construction Award for a Remodel/Tenant Improvement over $5 million and the Willie O’Neil Award for Environmental Excellence. Both of these awards are from the Associated General Contractors of Washington and the project won the 2005 Sustainable Local Development of the Year from the National Association of Industrial and Office Properties.