The Inland Northwest's Trusted Glass Expert Since 1992

Premium windows, doors, and glass. Locally owned & operated, expertly installed, and backed by the best warranties in the business.

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Quality Craftsmanship

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Early Collaboration

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Backed by Warranty

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Locally Owned

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Value Engineering

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Project Management

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Quality Craftsmanship ✳︎ Early Collaboration ✳︎ Backed by Warranty ✳︎ Locally Owned ✳︎ Value Engineering ✳︎ Project Management ✳︎

Built on Glass. Driven by Integrity.

GSI Complete Glass has been serving the Deer Park, Spokane, and Northern Idaho regions since 1992.

Founded by Brian and Tony, two industry veterans who believed this community deserved a glass company built on more than just competitive pricing. GSI was shaped from day one by a commitment to exceptional craftsmanship and honest service. More than three decades later, that commitment still drives everything we do.

That dedication to quality has opened doors — literally and figuratively. We carry a carefully selected lineup of top-tier manufacturers, giving our customers access to premium windows, doors, and specialty glass products.

The name GSI isn't just a name. It's a promise.

G — Guarantee. We stand behind every job, every time. No fine print, no excuses.

S — Service. From your first call to the final installation and project closeout.

I — Integrity. Fair pricing. Quality workmanship. Honest advice. Always.

"Doing it right, even when no one is watching."

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Reviews

  • "Staff was very communicative and the installers did an amazing job on replacing our 3 windows! We compared pricing in the area and found that theirs was the most competitive, and we are very happy with the results! Highly recommend!"

    — Hannah B

  • "This is the first time I had my windows replaced and I must say I didn't really know what to expect. The guys at GSI are truly experts in their field. The service was outstanding, the product is top quality and the price was right. I would recommend this company to anyone looking to get their windows or doors replaced."

    — Michael R

  • "Great service very fast and prompt will be my number one glass and window stop"

    — Kyeriann G

  • "Years and years of great service! Just got our S facing windows replaced after 21yrs. And I love my kitchen garden window!"

    -Former Customer: Sean Mc

  • "We had a broken window in our kitchen and we spent a month trying to get it replaced. We kept getting the run around by different companies. We finally got recommended to try GSI Complete Glass and they fixed it for us no problem. Great customer service and beautifully done glass work. 100% satisfied and will be using them for all my future window and glass needs."

    -Former Customer

  • "Brian did an outstanding job on ordering our window package. Our Marvin doors/windows look wonderful thanks for your hard work in putting together a complicated package."

    -Former Customer

  • "I am so happy with my experience shopping, pricing, and ordering exterior doors with GSI Complete Glass. Beth Williams, in particular, showcased top-shelf customer service. She fielded every question, idea, and request with both speed and grace. I felt like I was a priority client, and I am so happy to stay local and support a Deer Park business. We will absolutely be recommending and using GSI in the future."

    - Former Customer: Stefany H.