Window Installation & Replacement in Seattle, WA

New Windows Built to Last—Designed for the Pacific Northwest

At Signature Window & Door Replacement, we specialize in reliable, long-lasting replacement windows tailored to the unique climate and character of homes in the Puget Sound and Greater Seattle area.

Whether you’re upgrading your forever home or renovating a modest bungalow, we’re here to help you find the right window solution—at the right price—without the pressure.

We believe every homeowner deserves top-tier products and craftsmanship, and we work with a wide range of budgets to make that possible.

Call now to request a free window installation consultation with our expert team.

Call Us Now! 253-887-7792

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Why We Recommend Infinity from Marvin

Most window companies lead with vinyl. We don’t—because we’ve seen the difference firsthand.

Signature is the regional dealer for Infinity from Marvin Regional Dealer, one of the market’s most durable, energy-efficient, and attractive window systems.

Made from Ultrex® fiberglass, Infinity windows are 8 times stronger than vinyl and built to perform through decades of wet, windy Seattle winters.

Benefits of Infinity Fiberglass Windows

Engineered for the Pacific Northwest’s climate
Resists warping, swelling, and rotting
Exceptional thermal performance and energy savings
Sleek, modern frames with more visible glass area
Custom colors, finishes, and grille patterns
Backed by a limited lifetime warranty

Homeowners throughout Seattle, Bellevue, Tacoma, and beyond choose Infinity because it offers long-term peace of mind—without sacrificing style.

“Infinity from Marvin is the window we trust in our own homes—and it’s the one we recommend for yours.”

Replacement Windows to Fit Every Need

We understand that every home—and every budget—is different. While Infinity fiberglass is our top recommendation for long-term value, we also offer the following:

Vinyl windows are a smart, cost-effective choice for rental properties, investment homes, or matching previous vinyl installs.
Wood and wood-clad windows are perfect for traditional or historic homes.
Specialty windows and modified window openings require custom configurations, including bay, bow, oversized, or architectural shapes.

Our team will help you compare all your options and find a solution that fits your goals without overselling or pushing unnecessary upgrades.

Expert Installation That Sets Us Apart

A great window is only as good as its installation—and this is where we truly shine.

We don’t outsource our work to the lowest bidder. Our installation crews are highly trained and paid above the industry average, and many of them have been with us for over a decade.

They treat your home with respect, communicate clearly, and get the job done right.

What Makes Signature’s Installation Different

Our installation process ensures we deliver premier results. You can expect the following:

Clean, detail-focused craftsmanship
Polite, professional crews who care
Strong job site supervision and communication
No shortcuts or rushed installs
100% Lifetime Installation Warranty on all jobs

We stand behind our work for life in an industry where most companies offer one—to five-year labor warranties. This is one of the biggest reasons customers refer us to friends and come back to us for future projects.

The Signature Process

We make the window replacement process simple, transparent, and stress-free.

Schedule your free consultation: One of our experienced Design consultants will visit your home, assess your current windows, and discuss options tailored to your space and budget.
Receive a clear, pressure-free quote: We don’t use pushy tactics. You’ll receive a detailed proposal outlining product options, timelines, and pricing—with no surprises.
Professional installation: Our installers show up on time, clean up thoroughly, and do things the right way the first time.
Ongoing support: We’re here long after your project wraps up—with lifetime installation coverage and responsive service.

Why Homeowners Trust Signature

Locally owned & family-operated since 1999
Over 25 years of experience in window and door replacement
Seattle-area dealer for Infinity from Marvin
One of the few companies offering a 100% Lifetime Installation Warranty
Thousands of successful installs across King, Pierce, and Snohomish Counties
Top-rated on Google, Yelp, and Angi

Frequently Asked Questions

Is fiberglass better than vinyl windows?

Yes. Fiberglass is stronger, more weather-resistant, and more dimensionally stable than vinyl. It lasts longer and requires less maintenance, especially in the wet Pacific Northwest climate.

Are Infinity windows more expensive than vinyl?

Typically, yes—but they also last significantly longer and require fewer repairs or replacements over time, making them a smarter investment in the long run.

Can you work within my budget?

Absolutely. During your consultation, we’ll discuss all options and find a solution that is appropriate for your home, timeline, and financial goals.

Do you offer financing?

Yes. We offer flexible financing plans to help make your window project affordable and stress-free.>

Ready to Upgrade Your Windows?

Whether you’re just getting started or ready to move forward, we’re here to help. Our team combines top-tier products with unmatched installation and service. Let’s talk about what’s right for your home.

Request a free window consultation or call us to get started today.

Our Reviews

Signature Window & Door Replacement

4.9

Based on 184 reviews

review us on

rachel mf

17:04 06 Mar 26

I cannot praise Signature highly enough. We hired them in 2012 to replace all of our windows and two sliding doors - the work was excellent and we love our Simonton windows. We just hired them again to rebuild our two-story entryway and install a Perva door and new windows. From the very thorough conversations with our salesperson, Vitaliy, to the scheduling with the office staff, to the actual installation - everything is as professional and high quality as you can find. We gathered quotes from three other companies but none of them went to any effort to truly lay out how the job would be accomplished. Photos show the old & new interior side, and the new exterior. Still needs painting but we're so happy!

G Zenkin

04:19 04 Mar 26

After an extensive vetting process and comparing multiple options, I confidently chose Signature Windows & Doors for my home, and they absolutely delivered. The Marvin brand windows they installed are beautiful and of incredibly high quality—the craftsmanship speaks for itself. Beyond the great product, the installation process was truly exceptional. The crew was professional, precise, and made the entire project seamless from start to finish. I highly recommend them to anyone looking for top-tier windows and flawless execution. I had a fantastic experience with Signature Windows & Doors.

Michele V

00:13 26 Feb 26

We called our project "The Window From Hell." It was a HUGE trapezoid window up high in a 2-story living room, and it needed to be replaced after its seal failed. I got bids, and was the most impressed with Danny L at Signature Windows. We had a tight deadline because the home was going on the market and access to the window, especially in the rain, was really challenging. Meeting the deadline, and the safety of the installers, were non-negotiable. Danny came out the very next day to measure the Window From Hell and, not only did he give me the best price, but his company was the only one that had all the scaffolding equipment readily available at no extra charge. The window arrived sooner than expected, and installation was quickly scheduled to meet the deadline. Then we hit a snag: some epic rain made the cedar roof too slippery for safe conditions. Brent and his crew of expert (and very brave) installers rigged up a safe way to haul this brand-new Mother of ALL Windows up to the second floor and install it using very long ladders, secure scaffolding, and harnesses. I think we had 4 or 5 installers for this job. It took all day to get the old Window From Hell out and the new Mother of All Windows installed. But what a job! Perfect caulk lines, perfect cleaning of the glass, perfect clean-up of the job site, indoors and out. Job done ON TIME, SAFELY, and at an excellent price. If Signature can handle my Window From Hell, I am very confident they can install ordinary double-hung windows that exceed your expectations for quality, price, timeliness, and workmanship. I highly recommend Signature Windows.

Robert Horn

01:35 19 Feb 26

I highly recommend Signature. Windows look great, we are really happy with our installers too, they picked up everything each day and were real craftsmen, they took pride in the work they were doing for us.

Leanne Bough

23:41 12 Feb 26

Signature windows was wonderful to work with from the sale through the installation.

Dana B

18:02 25 Nov 25

Everything from the initial consultation, regular updates on my order and installation was wonderful. The most recent installation was the third time I've had Signature replace old windows and I've been so pleased every time. They took the time to explain which windows needed replacement and provided options without any sales pressure. It's so nice to work with a company that believes in great customer service and offers quality products.

Amy Dahlin

16:47 23 Oct 25

We have chosen to work with Danny and his team at Signature Window & Door twice now. We love the quality of the windows and the help they provide in the design process all the way to the finished installation. We put in a 15' folding door at our last home. It was a showstopper! Highly recommend them to bring your home back to life with beautiful windows that are built to last!

Pam Moser

22:08 18 Feb 25

We bought a house that needed all new windows & sliding glass doors replaced. So we did our research and visited window replacement companies to see & touch different window & screen types. We decided to work with Signature Window primarily based on customer service as we received during the research & planning process with Office personnel (friendly, helpful, responsive) & Sales team (product knowledge, design assistance, open & honest).

1st Project (Aug 24) - 8 windows & 1 Sliding Door
2nd Project (Feb 25) - 1 ceiling to floor large window & 2 windows
Product of windows & door was excellent - we are extremely happy.

The customer service experience was superb. We worked with Sales Rep, Scheduler, Window Measuring Rep & Installers - all were friendly, open & honest, communicative, assisted with design & product knowledgeable. Installers did an awesome job with project cleanliness & kept busy all day long.

We are extremely satisfied with our overall experience with window replacement with Signature Windows 🥰