Finding the Best Window Installers
Last updated May 2023
Choosing a good installer is as important as choosing the right windows. We receive a disturbing number of complaints—often about sloppy work—from consumers regarding window installation work, often about companies that advertise heavily.
The ratings of local window installers we report on our Ratings Tables can help you avoid many problems.
We regularly survey Puget Sound area consumers and ask them to rate window installation and repair companies they’ve used on questions such as “doing work properly,” “promptness,” “letting you know cost early,” “advice on service options and costs,” and “overall quality.” We primarily surveyed Checkbook subscribers, but we also invited other randomly selected consumers to provide ratings. Click here for further description of our customer survey and other research methods.
Our Ratings Tables show the percent of each company’s customers who rated it “superior” (as opposed to “adequate” or “inferior”) on each survey question. Our Ratings Tables also reports the percent of surveyed customers who rated each company “adequate” or “superior” (as opposed to “inferior”) for “overall quality.”
As you can see, some window outfits make a lot of their customers unhappy: A few were rated “inferior” by more than 20 percent of their surveyed customers. But fortunately, we also identified several top-notch businesses.
Check Complaint Histories
Our Ratings Tables also report counts of complaints we gathered from the Consumer Protection Division of the Washington Office of the Attorney General for a recent two-year period, and complaint rates relative to the volume of work companies do. Click here for more information on reported complaint counts and rates.
Get Pricing from Several Companies
Cost can vary substantially, depending on which windows you select and who installs them.
The table below indicates the price variation among installation companies when Checkbook’s undercover shoppers gave them the same job specifications and let them decide which brand of windows to use. For each job, the highest-priced company’s quote was more than twice as high as the lowest quote.
You can’t get the same brands of windows from all companies, but even among companies offering the same brand, company-to-company differences of $50 to $100 per window are common.
Our Ratings Tables report our price comparison scores, which show how surveyed companies compared on prices for the jobs we checked. The scores show how each company’s prices compared to the average price for all companies that quoted on the same jobs. We adjusted the price comparison scores so that the average for all the companies is $100. If a company’s score is $110, for example, this means that the company’s prices were, on average, 10 percent higher than the average prices for the same jobs.
To get a good price:
- Have several installers come to your home, measure your windows, recommend a replacement method and a brand and model of window, and quote prices.
- Discuss these recommendations and ask about lower-priced alternatives. If substantially lower prices would be available for less energy-efficient windows, ask the companies to estimate the actual energy savings the more expensive windows will produce—and insist that they provide detailed information on how they calculate these estimates.
- Decide on your final specifications. Call the companies that already provided estimates and others to get their prices for these final specifications. Get written proposals.
- If you are not confident that the quality of the windows themselves is comparable from company to company when the companies quote only on specifications, have the companies quote on a specific brand and model; several companies are likely to quote on some of the same brands and models.
- If you are remodeling and will be putting windows into roughed-in openings, consider having your contractor purchase your windows. Window installation companies are primarily geared to installing replacements, not new construction.
Until 2032 you can claim a tax credit if you install energy-efficient windows, skylights, or doors on your primary residence. The credit is equal to 30 percent of the cost of eligible improvements made between 2023 and 2032, when the program expires. For window and skylight installs, the maximum annual credit is $600; the limit for doors is $250 per door, with a $500 max credit. To qualify, the new products must meet Energy Star’s “Most Efficient” criteria—visit EnergyStar.gov/products for lists.
Also check whether there are local tax incentives and if your utility company offers rebates for installing energy-efficient windows. An excellent resource to find these types of incentives is DSIREUSA.org.