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Sound Insulation

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Sound insulation modifications performed on single-family homes consist of the installation of Sound Transition Class (STC 44) rated windows and solid-core exterior doors. Modifications to ventilation systems and chimneys are also performed as necessary. Funding for the program is typically provided by the Federal Aviation Administration (FAA) at approximately 80 percent, with the remainder from the Port of Seattle.

Sound Insulation Statistics

  • Over 9,400 single family homes sound insulated
  • Five condominium complexes sound insulated (246 total individual units)
  • Implemented a $100 million agreement with the to Highline Public Schools for sound insulation ($50 million from the Port and $50 million from the FAA) in noise impacted school buildings being constructed as part of the District’s capital facilities improvement plan – eight of 15 identified schools are complete
  • $6 million provided to the Highline College to assist in sound insulation of buildings located on the college campus – 14 buildings were completed through this program


  • Funding for sound insulation comes from approximately 20 percent Port of Seattle funds and 80 percent FAA Airport Improvement Project (AIP) grant funds

Does your home qualify?

Per FAA guidelines, all homes have to be located within the approved noise remedy boundary for Seattle-Tacoma International Airport.

Please contact the Airport Noise Office or call (206) 787-5393 for more information and official eligibility.


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