Serving the Greater Seattle & Portland Areas

Create Your Outdoor Living Space Call:
Washington: (206) 455-6644 | Oregon: (503) 922-1024

Underdecks by Undercover Systems Pacific Northwest


Undercover Systems Pacific Northwest provides clients with a dry, functional outdoor living space by finishing the underside of your deck with a ceiling. Our underdeck roofing system channels water into your gutter system while dramatically improving exterior views without sacrificing headroom or aesthetics. Our underdecks are constructed out of washable, mold-resistant panels that are easy to remove and replace for plumbing or electrical access. Our underdecks are custom built to fit in with your existing style and come in a wide variety of colors.


Expand Your Outdoor Living Space With Our Patented Underdeck System


The Undercover Systems Pacific Northwest team has been building exquisite outdoor living spaces with our patented underdeck process since the 1990s. Our wealth of experience is unmatched nationally, and we partner with you to ensure that all aspects of the design and installation process move seamlessly. We are proud to offer an exclusive lifetime warranty on every underdeck system that we create for as long as you own your home.

What are the Benefits of an Underdeck System?


  • Provides a year-round outdoor space for entertaining, dining and outdoor enjoyment (they are the perfect spot for a hot tub!)
  • Increases home value significantly
  • Improves views and connects your family with nature
  • Makes your home feel bigger by dramatically increasing dry, usable space
  • Protects your deck by ensuring that water or debris to not come into contact with crucial deck elements

COVID-19 Update: If you are in need of undercover system installation or any emergency repairs, we can do it. To keep you and our workers safe Undercover Systems has established a social distancing policy, and we don’t have to enter your home to do work. We are also 100% paperless, allowing you to make payments, and e-sign all your documents from your phone or computer using BuilderTrend. Have questions, please feel free to call!