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Window Replacement Β· Lake Oswego, OR

Window Replacement in Lake Oswego, OR

Gorilla Works handles window replacement in Lake Oswego, OR, installing energy-efficient Milgard vinyl and fiberglass windows that meet Oregon code and hold up to Northwest weather. We are Oregon-licensed, factory-certified, and have built home exteriors across the Portland metro for over 20 years.

  • Milgard vinyl & fiberglass, built to Oregon energy code
  • Egress and safety-glazing handled to code
  • Permit pulled through the City of Lake Oswego
Get a Free Lake Oswego Quote

Gorilla Built. Gorilla Strong

Commercial-grade materials and expert installation designed for Northwest weather.

Family-Owned & Local

A local team that treats every home like their own, honest, friendly, and reliable.

Built Right the First Time

Precision craftsmanship that uses only the highest-quality materials and eliminates costly future repairs.

#1

Backed by 5-star reviews, licensed & insured

  • 20+ Years Experience
  • Warranty-Backed Work
  • Licensed & Insured
  • Commercial-Grade Materials

Window Replacement Built for Lake Oswego Homes

Lake Oswego is an established community, and a lot of its homes were built mid-century or earlier with original wood or aluminum-frame windows. Those are the ones that stick, rattle, and let the heat out, and on an older home the fix has to respect the way the house was built. New Milgard windows bring the comfort and the energy bill up to date without changing the look you want to keep. Here is what we hold to on every Lake Oswego job.

  • Oregon energy code. New and replacement windows in Oregon have to reach a U-factor of 0.30 or lower. We order every Milgard window with the Low-E glass and gas fill that meets it, so your job passes inspection.
  • Egress where it counts. Bedroom windows have to open wide enough for an emergency escape under Oregon code. If your old openings fall short, we tell you before we order, not after.
  • Safety glazing. Windows next to a door, low to the floor, or beside a tub or stairs need tempered glass. We spec it wherever the code calls for it.
  • Permit and inspection. We pull whatever permit your project needs through the City of Lake Oswego and meet the inspector, so none of that lands on you.

We replace windows throughout Lake Oswego and the neighborhoods around it, from First Addition, Lake Grove and Mountain Park to Westlake, Old Town and Palisades, plus nearby West Linn and Rivergrove.

Still choosing between vinyl and fiberglass, or need another city? See our Portland window page, our Beaverton and Tigard window pages, or our Vancouver, WA page.

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Reviews

Trusted by Families Across Portland & Vancouver

From clean installations to long-lasting quality, homeowners choose Gorilla Works because we do things the right way, with honesty, care, and craftsmanship that speaks for itself. Here’s what people are saying about working with our team.

β˜…β˜…β˜…β˜…β˜…Β  Excellent 5.0 Β Β·Β  35 Google reviews

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Excellent craftsmanship, professional, fast and very respectful of your property. The crew was awesome.

Debbie Howell, 1 week ago
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5 star experience! Highly recommend to anyone looking for a fencing or window contractor. Love their lifetime window warranty program.

Art Kulch, 2 weeks ago
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David was well informed and got us the best deal on our fence!

AJ Pen, 2 weeks ago
FAQ

Frequently Asked Questions

Have questions about materials, pricing, or installation? Here are the answers homeowners ask us most.

Do I need a permit to replace windows in Lake Oswego?-
Often, yes. A full window replacement in Oregon can require a building permit, especially when an opening changes or a bedroom egress window is involved. We check what your Lake Oswego job needs, pull any permit through the City of Lake Oswego, and meet the inspector so it is signed off correctly.
What window efficiency does Oregon require?+
Oregon code requires new and replacement windows to reach a U-factor of 0.30 or lower. We order Milgard windows with the Low-E glass and gas fill that meets it, so your Lake Oswego project passes inspection.
What windows do you install in Lake Oswego?+
Milgard vinyl and fiberglass windows, in the styles that suit Lake Oswego homes: double-hung, casement, slider, picture and bay or bow. We install vinyl and fiberglass, not wood-frame windows.
Do you serve the areas around Lake Oswego?+
Yes. We cover Lake Oswego and the nearby communities, including West Linn and Rivergrove, and neighborhoods like First Addition, Lake Grove, Mountain Park, Westlake and Old Town.

Ready to Upgrade Your Home’s Exterior?

Strong materials. Clean installations. Honest communication. It all starts with a quick quote.

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  • 20+ Years Experience
  • Warranty-Backed Work
  • Licensed & Insured
  • Commercial-Grade Materials
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