Who We Are
We're increasing curb appeal, improving efficiency, and enhancing quality of life one home at a time.
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Proudly Made in America
We proudly source materials from the USA and we’re committed to following this tradition.
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Total exterior solutions
We have solutions for your entire home exterior. Windows are just the beginning.
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Nationally known, locally owned
We provide the customer service of a small business backed by a nationally recognized brand.
Replacement Window Company in Portland, ME
Transform the exterior of your home or business with new windows, doors, or siding.
At Window World of Southern Maine, we offer a fantastic selection of options for your residential or commercial property, including the best deals on energy-efficient replacement windows in Portland, ME. Updating the windows, doors, or siding on your property can dramatically increase its curb appeal and value. You can also boost protection against the elements and cut down on the cost of heating
We give you quality and service that goes far beyond anyone else.
We opened our doors in 2013 with a promise: "Superior Products, Professionally Installed, at a Guaranteed Low Price."
Our quality products, professional local installers, and comprehensive warranties ensure that you’ll always have peace of mind.
Use our Visualizer to bring your project to life
Upload a picture of your own home and experiment with different windows, siding, and doors. Our Visualizer takes the guesswork out of your home improvement project.
Financing Available
We offer financing options with approved credit through the Window World Credit Card Program, so you can make the home updates you need without delay.
Learn MoreWindow World Gives Back
At Window World, we take service seriously.
For us, service extends beyond the customer — it’s about serving the entire community. We believe in putting our money where our heart is, raising financial support for organizations that inspire us to be better people.
Window World Cares
Window World Cares® is a foundation devoted to raising money for St. Jude Children’s Research Hospital®. Since its inception in 2008, Window World Cares has raised over $22 million for the hospital, and we show no signs of slowing down.
Window World CaresWindow World Military Initiative
The Window World Military Initiative defines our company-wide commitment to honor and serve America’s veterans, active military, and military families, across our entire system of over 200 locations.
Window World Military Initiative
We're known for our service — but don't just take our word for it.
We take great pride in delivering top-quality products and unbeatable service. We are respected by customers and experts alike, which is what has helped us become America's largest exterior remodeler. But don't just take our word for it — take theirs.
Find out what customers are saying about our unbeatable service and quality.
Dylan O’Neil has been very helpful on inspecting the windows telling us how much better these windows will be. We are looking forward to being warmer this winter.
Because the old Andersen windows are 44 years old.
- Patricia
4.4 176 reviews