Window Replacement Cost
Typical cost range:
$1,105–$1,730
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Window replacement costs vary greatly based on the style, size, materials, features, and chosen brand. Even your location impacts cost. Expect to pay anywhere from $300–$2,500 for replacement windows, but remember that window upgrades have a high return on investment (ROI), not only due to reducing your monthly electric bill but also by increasing home value.
Our guide includes price ranges for common window types and insight into how various factors affect window replacement pricing, such as which top window brands are most affordable. We collected cost figures and window industry data from the construction cost database RSMeans, respected window associations such as the National Fenestration Rating Council (NFRC), window company representatives, and our internal survey of 1,500 homeowners so you can find quality windows within your budget.
Key Takeaways
- Our recent homeowner survey found that 47% of respondents paid between $500 and $3,000 for their entire windows project.
- The best value window option is a vinyl, double-hung window with insulated, double-pane glass, whereas the most affordable window is a single-pane, single-hung aluminum window.
- There are several ways to save money when replacing windows, such as buying in bulk, applying for a federal tax credit, and asking your local utility company about rebates and incentives.
Window Replacement
Window replacement typically costs $300–$2,000 per window, depending on the window type.
Window Repair
Window repair typically costs $177–$623, but it can vary based on the type of repair.
How Much Does It Cost to Replace Windows for Your Whole House?
The cost of replacing all of the windows in your house costs an average of $5,855–$29,275. The cost varies by the number, style type, and measurement of windows that you are replacing. You can measure your own windows to get a better idea of the cost of window replacement.
| Number of Windows | Average Cost |
|---|---|
|
5–6 |
$5,855–$7,026 |
|
8–10 |
$9,368–$11,710 |
|
13–15 |
$15,223–$17,565 |
|
18–20 |
$21,078–$23,420 |
|
23–25 |
$23,420–$29,275 |
Is It Cheaper to Replace All of Your Windows at Once?
If your budget allows, buying all your windows at once is more cost-effective than a couple at a time. That’s because some window manufacturers will give you a discounted rate for buying in bulk. You also won’t have to pay installers to come out multiple times or for multiple permits if your county requires them.
We recommend working with a local contractor to create a full project budget and get an accurate estimate. According to our homeowner survey, 47% of respondents paid between $500 and $3,000 for their entire windows project. Keep this price range in mind when planning your window upgrades.
How Much Do Different Window Styles Cost to Replace?
Window style refers to the design type. While older homes commonly have single-hung windows, today’s houses are primarily constructed with double-hung windows. Amanda Hatherly, CEO of the Building Performance Institute, says, “If you live in a home built before 1978, you will need to have your window frames and sills tested for lead paint.”
You may have a more rare window type or are looking to make a design change. In that case, we’ve listed popular window styles and their descriptions below. Smaller repairs, such as window glass replacement can be cheaper.
Cost and Function of Common Window Types
In our survey, we uncovered how much homeowners spent on different window styles. See these cost figures below, along with more information on how common window types function:
- Arched ($273–$1,675): Arched windows feature a semicircle above a rectangular base and often serve as a focal point for a home’s design. They’re usually fixed, meaning they don’t open.
- Awning ($600–$2,500): These windows have a top-hinge design that can push outward for ventilation without letting rain inside.
- Bay and bow ($500–$2,200): Bay windows typically have a three-dimensional, three-pane design. Bow windows have a more curved design. Both are large, more expensive window types that let in lots of light.
- Casement ($400–$2,400): Casement windows use a hand crank to open like a door, typically from left to right. You’ll often find them in kitchens and bathrooms where you need ventilation.
- Custom ($500–$2,400): Custom windows are designed to fit your space and vary in function and design depending on your chosen style.
- Double-hung ($400–$2,000): A double-hung window opens from the top or bottom for maximum ventilation and costs slightly more than single-hung windows. In new construction homes, it’s the most common window style. You’ll often see them in bedrooms and living rooms.
- Egress ($700–$2,475): Egress windows are specialty windows that serve as emergency exits in habitable spaces such as a basement or attic.
- Glass block ($400–$2,200): A popular choice for bathroom windows, glass block windows offer excellent lighting and privacy.
- Picture ($300–$2,000): Picture windows, sometimes called fixed windows, come in a single-framed glass sheet usually customized for a home’s design. They’re the most energy-efficient window style because they don’t open, so you don’t have to worry about a loose seal that lets in air and moisture.
- Single-hung ($400–$2,000): Single-hung windows have a movable bottom sash and a fixed upper sash, making them great security options for bottom-floor installations.
- Skylight ($135–$1,625): Skylight windows are installed into your home’s ceiling to provide overhead natural light.
- Storm ($64–$445): Storm windows can be installed on the exterior or interior of existing windows to protect them from severe weather and provide further insulation.
- Transom ($825–$2,500): Transom windows sit on a horizontal beam, called a transom, over another window or a door. They can be decorative or functional and vary in shape and style.
Source: Calculated based on answers from 1,500 window buyers.
Ask Yourself This
- Do I care more about appearance or energy efficiency?
- Do I want the window to open? Should it open from the top or the side?
- What size window do I need?
- Which window type is best in each room?
Learn more about the types of windows and their benefits in the video below.
How Much Do Different Frame Materials Cost for Window Replacement?
Window frame material helps determine your window’s appearance, energy efficiency, and upkeep. The most common window materials are aluminum, composite, fiberglass, vinyl, and wood. They all have specific advantages and disadvantages that are reflected in their costs.
Aluminum
Aluminum is a strong, lightweight metal that resists bending and warping and usually costs between $400–$900 to replace. It’s a good option if you want a thin frame that can still hold a heavy pane of glass. However, metal isn’t that energy-efficient, and aluminum windows are prone to rust and corrosion.
Composite
Composite frames cost on average $400–$1,900 to replace. These windows blend wood fibers and polymers. Composite windows are low-maintenance and energy-efficient, but quality varies by manufacturer.
Fiberglass
Replacing fiberglass window frames usually costs between $300–$1,900. These windows are incredibly energy-efficient, customizable, and low-maintenance, but they may not meet everybody’s budget.
Vinyl
Vinyl window frames usually cost $300–$1,700 and are most common due to their durability and affordability. They’re easy to maintain but are less visually appealing than other options.
Wood
Solid wood frames cost between $300–$2,000. These windows are energy-efficient and customizable. They’re aesthetically pleasing but can come with costly window repairs since they’re prone to warping. Wood windows can also be covered in fiberglass on the outside, though this is an extremely expensive option.
Compare Common Frame Materials
Get a better look at each material’s strengths and weaknesses in the table below. Note that not having a checkmark doesn’t mean that material doesn’t have that characteristic at all, just that it isn’t as strong in it as others.
| Characteristic | Aluminum | Composite | Fiberglass | Vinyl | Wood |
|---|---|---|---|---|---|
|
Average Cost |
$400–$900 |
$400–$1,900 |
$300–$1,900 |
$300–$1,700 |
$300–$2,000 |
|
Attractive |
✘ |
✔ |
✔ |
✘ |
✔ |
|
Durable |
✔ |
✔ |
✔ |
✔ |
✔ |
|
Energy-Efficient |
✘ |
✔ |
✔ |
✔ |
✔ |
|
Highly-customizable |
✘ |
✘ |
✔ |
✘ |
✔ |
|
Low-maintenance |
✘ |
✔ |
✔ |
✔ |
✘ |
Source: Calculated based on answers from 1,500 window buyers.
The best window material for the price is vinyl. Top vinyl windows are budget-friendly yet durable, long-lasting, and highly energy-efficient. When choosing framing material, ask yourself:
- Can I repair the existing frame, or do I need a full frame replacement or window insert?
- Do the frames match my home’s style?
- Which energy features do I need based on my climate?
- Which material checks most of my boxes while being within my budget?
Who Is the Best Window Replacement Company?
See how leading window brands compare on price and other key metrics in the table below.
| Company | Logo | Star Rating | BBB Rating | Price Range | Warranty | Link |
|---|---|---|---|---|---|---|
| A+ | $1,200+ | Limited transferable | Get Quote | ||
 | Not Rated | $600–$900 | Limited lifetime transferable | Get Quote | ||
 | F | $550+ | Limited lifetime transferable, lifetime transferable | |||
 | A+ | $550–$849 | Lifetime transferable | Get Quote | ||
 | A+ | $400–$1,925 | Limited transferable | Read Our Review | ||
 | A+ | $550–$849 | Lifetime transferable, limited transferable | |||
 | A+ | Limited lifetime transferable | Read Our Review | |||
 | A+ | $1,200+ | Limited lifetime transferable | Read Our Review |
*Average cost ranges calculated from homeowner survey data.
What Is The Most Cost-Effective Window Replacement?
The cheapest window isn’t always the best option. We’ve looked at which selections are most budget-friendly and which have the best curb appeal and energy efficiency.
If upfront cost is your top priority, your most affordable option is a single-hung window with aluminum framing and single-pane, non-insulated glass from Simonton Windows. Single-hung windows are an old standard with a simple design and relatively easy installation. Aluminum is the cheapest window framing material, and non-insulated, single-pane glass requires fewer materials and treatments, meaning less money spent. Unfortunately, this option isn’t very energy-efficient. If you want a better-performing but still affordable window, opt for a vinyl, double-hung, double-pane window with insulated glass.
Most Affordable
Brand: Simonton Windows
Style: Single-hung window
Material: Aluminum
Glass: Single-pane, uninsulated
Most Energy-Efficient
Brand: Renewal by Andersen
Style: Picture window
Material: Fiberglass
Glass: Triple-pane, insulated, low-e coated
Which Factors Affect the Cost of Window Replacement?
The biggest factors that impact cost are window style, material, and glass. These selections can vary the price by a few hundred to a few thousand dollars. For instance, choosing a double-hung window with vinyl framing and untreated glass costs on the low end of the range, while a wooden bay window with specialty, energy-saving glass is far more expensive.
“There are many factors that will increase the cost of a window replacement project. The windows, themselves, and the labor to install them will make up the bulk of that cost,” says Jason Henler, president of the National Association of the Remodeling Industry. “Quantity, style, and the materials used can all affect the price.”
Let’s look at which variables most impact your replacement window cost:
- Window style
- Window material
- Glass type
- Brand
- Energy efficiency
- Installation labor
- Number of windows
According to Alan Atalah, Ph.D., a professor of construction management, the most important cost factor is based on the homeowner’s value system and how it fits with “the window’s design and capabilities and the rest of the building.”
- Homeowners invest in window replacement for several reasons. When we surveyed 1,500 homeowners and asked why they installed new windows, 26% said visible damage, such as broken glass, while 20% said air leakage.
How Much Do Different Glass Types Cost for Window Replacement?
When discussing window glass types, we’re talking about two things: the number of panes and glass treatments. Whether you decide on replacement or new construction windows can also impact price.
| Glass Type | Average Cost |
|---|---|
|
Single-pane |
$31–$313 |
|
Double-pane |
$219–$1,950 |
|
Triple-pane |
$700–$1,050 |
|
Frosted |
$92–$627 |
|
Laminated |
$355–$865 |
|
Tempered |
$335–$595 |
What Glass Pane Options Are Available for Replacement Windows?
In our survey, 69.8% of respondents chose double-pane windows. Window manufacturers make three pane options:
- Single-pane windows (one layer of glass)
- Double-pane windows (two layers of glass)
- Triple-pane windows (three layers of glass)
With two or more glass panes, manufacturers can add a gas filling between the panes for extra insulation.
What Specialty Glass Treatments Are Available for Replacement Windows?
Our survey takers reported paying extra for specialty glass treatments—25% chose frosted glass, 28% chose laminated glass, 49% chose tempered glass, and 6% chose tinted glass.
Here are the most common glass treatment options:
- Frosted Glass: This glass offers semiopaque views, allowing sunlight to travel through your window while blurring the view into your home.
- Laminated Glass: This glass option contains resin for added durability, making it up to five times stronger than normal glass.
- Tempered (Safety) Glass: This glass offers better protection than laminated glass and blocks debris damage caused by inclement and extreme weather. Tempered glass is required in windows near doors and in ones that extend to the walking surface.
Things to Consider When Choosing Replacement Window Glass
- Do I want extra privacy?
- How much do extra safety features matter to me?
- Which window glass is best for my area’s weather conditions?
- What kind of look do I want?
Who Offers the Most Cost-Effective Window Replacement?
We’ve reviewed the top window brands in the industry, evaluating their products and services, reading what customers have to say, and surveying homeowners who’ve used them. Our 1,500 survey takers reported the following cost averages for these popular brands. Most brands average in the $1,100–$1,600 range. Data showed Milgard and Champion as the least expensive and Harvey and Larson as the priciest. You should also consider factors like a company’s installation process for window replacement.
| Brand | Average Cost Per Window | Average Cost Range |
|---|---|---|
|
Milgard |
$1,105 |
$300–$1,700 |
|
Champion |
$1,141 |
$300–$1,700 |
|
Andersen |
$1,174 |
$300–$1,800 |
|
Renewal by Andersen |
$1,194 |
$400–$1,850 |
|
Castle |
$1,210 |
$300–$2,325 |
|
Pella |
$1,261 |
$400–$2,000 |
|
Marvin |
$1,288 |
$400–$1,925 |
|
Ply Gem |
$1,323 |
$250–$2,050 |
|
Jeld-Wen |
$1,436 |
$500–$2,300 |
|
Simonton |
$1,497 |
$400–$2,625 |
|
Loewen |
$1,513 |
$600–$2,300 |
|
Larson |
$1,561 |
$400–$2,800 |
|
Harvey |
$1,597 |
$500–$2,350 |
Source: Calculated based on answers from 1,500 window buyers.
How Much Do Energy-Efficient Windows Cost?
“Contrary to common belief, windows are not the biggest cause of high energy costs and uncomfortable homes,” says Hatherly. “Most home energy loss is from the attic, foundation, and unseen penetrations, not from windows.”
However, if you’re going to pay for one thing in a window, make it energy efficient. Choosing energy-saving features such as low-e glass, argon gas filling, and triple panes is a smart investment. Luckily, most reputable window companies are Energy Star partners, so they already incorporate these features into their manufacturing. That means you won’t see a big price difference from brand to brand based on energy features alone.
We recommend buying only windows with an Energy Star label. These windows are rigorously and independently tested for energy performance across U.S. climates and are recommended by the U.S. Environmental Protection Agency. Energy Star products are also tested independently by the National Fenestration Rating Council, a nonprofit organization that grades windows’ insulation and efficiency performance.
According to Energy Star, using its certified windows lowers your household energy bills by an average of 12% per year. Upgrading noncertified, single-pane windows to certified will save you $101–$583 per year and $27–$197 per year for double-paned. Energy Star products carry energy performance rating designations, making it easier to select the best options for your home’s needs.
What Type of Energy-Efficient Windows Are the Best?
Your chosen glass type impacts window pricing, but going cheaper may cost you in the long run. Glass types that cost more upfront, such as multipaned or glazed, provide a higher overall ROI due to being more energy-efficient, which lowers your monthly energy bill.
According to the Efficient Windows Collaborative, double-pane windows are homeowners’ most popular choice because they’re inexpensive, energy-efficient, and suitable for most U.S. climates. Depending on the size and style, double-pane windows average $219–$1,950. If you’re in a climate with harsh winters or severe weather activity, such as high winds, we recommend investing in the cost of triple-pane windows. The extra glass layer adds further insulation and protection. It’s also great for noise reduction.
Homeowners can also opt for glass with special coatings that block ultraviolet (UV) rays. Low-emissivity coatings (low-e) help control how heat moves through window panes. Low-e glass coatings prevent heat from entering your home without blocking sunlight. The UV blocking also protects floors, furniture, and art from sun bleaching.
The Department of Energy states that although windows with low-e coatings cost about 10%–15% more, energy loss reduction improves by 30%–50%. This means your home will be more comfortable, your electricity bills will be lower, and your HVAC system won’t have to work so hard. Insulated glass units also help to increase energy efficiency.
Tinted windows are a cheaper alternative to low-e windows. They use solar window film to block UV rays. They’re similar to car window tinting but are less noticeable and don’t hinder your home’s aesthetics.
Tips From Window Experts
- “The best option is to choose windows with either double or triple-paned glazing and a low-e coating. Our Glass Doctor® experts recommend choosing energy-efficient low-e glass for optimal performance. Low-e coatings prevent heat gain and protect your home’s interior from fading by blocking the sun’s harmful UV rays. Because the coating is invisible, you will benefit from everything low-e glass offers without obstructing your view.” — Jeramy Sibley, President of Glass Doctor, a Neighborly company
- “Performance needs are a big factor that will influence cost, but it’s important to work with a window replacement expert local to your area to ensure you get the performance you need for your climate, the location of the window, and the way you need it to operate.” — Michael Wandschneider, Director of Group Product Management at Marvin Windows & Doors
How Much Does Window Installation Cost?
Expect to pay an average of $36–$153 per window for installation. Like manufacturers, window installers charge different rates based on their experience and credentials. More complicated installations, such as oversized and specialty windows, can increase labor costs. A standard installation takes about an hour, while large jobs can last six hours or more. You can save money by installing windows yourself, but we don’t recommend it.
Can I Install Windows Myself?
In most cases, you can install your replacement windows yourself. However, this might not be as economical as expected. If you choose a do-it-yourself (DIY) installation and have an issue with your window later on, many manufacturers won’t accept the warranty claim because their warranties require professional installation.
Unless you’re highly advanced at home improvement construction projects, it’s not likely you have the skill to install a window properly. Improper installation can result in air leakage, moisture infiltration, broken window parts, and expensive repairs that can affect not only your window but your entire home. Additionally, many newer window systems are attached to your house in complex ways that aren’t suited for most homeowners.
Window installation experts have experience with proper window installation and can identify any performance issues. Professional installers are also familiar with local codes and regulations, ensuring your new windows meet all building standards and requirements. They’ll also know about common but easy-to-miss pitfalls such as dealing with nearby siding issues and the effects of lead paint and asbestos.
- Window installers provide a faster installation process and back their jobs with workmanship warranties. Out of the 71% of our surveyed respondents who worked with a professional installer, 58% said they wanted to protect their investment with a workmanship warranty.
We learned through one of our team members attending an installation with a Renewal by Andersen installer that another perk of professional installation is that the crew cleans up the entire job site and disposes of the old windows for you. An expert will also show you how to clean and maintain your windows to make the most of your warranty. Learn more about the step-by-step installation process in our window installation guide.
How To Save Money on Replacement Windows
“Homeowners can save money by choosing energy-efficient windows that qualify for rebates and tax credits,” says Jessica Ehrlichmann, vice president and general manager of windows and doors at Andersen. “Installing high-quality windows suited to the home’s climate can also lower energy bills. Scheduling window replacement during the off-season, like late fall or winter, may reduce labor costs, too. Comparing prices from multiple contractors and suppliers can also help find the best deal.”
You have several options to lower your window replacement costs. Learn more on ways to save below.
Federal Tax Credits
Thanks to the 2022 Inflation Reduction Act, homeowners can receive a federal tax credit for installing Energy Star-certified windows and skylights. According to Energy Star, you can claim up to 30% of installation costs for a maximum credit of $600. This credit applies to your primary residence and is available from January 2023 to December 31, 2032.
Rebates and Incentives
You can also check with your local utility company for any available rebates and incentives. These credits are limited to Energy Star or energy-efficient windows that have been professionally installed. You may also receive rebates from the window installer companies. Some states offer tax credits and rebates for energy-efficient home improvements, including windows. You should check the Database of State Incentives for Renewables and Efficiency (DSIRE) for available incentives in your state.
Choose Affordable Window Options
Choose affordable window replacement options and styles, such as vinyl, double-hung windows, to keep costs low. Although vinyl windows aren’t as visually appealing as wood or fiberglass, they’re energy-efficient and affordable.
Expert Tips on How to Save on Window Replacement
- Wandschneider says to consider purchasing windows from multiple product lines within a brand’s portfolio. “In some cases, you may need the performance and design of a certain product line. Other areas of your home may require a simpler window solution that can come from a different and potentially less expensive product offering.”
- Sibley also recommends a window tint if updating to multipaned windows isn’t in your budget right now. “Home window tint provides many of the same capabilities as low-e glass, but it’s applied to existing windows as an aftermarket product. Films of various shades are available to block out just the right amount of light and heat to meet your needs.”
What Other Factors Affect Window Cost?
These less-considered factors can also impact your expenses:
- Home age: A home’s age can increase labor costs, as older homes don’t always have standard window sizes or structural issues that require more labor.
- Permitting: Some counties require building permits and minimum energy efficiency standards before window installation. Permits are only slight fees, but meeting minimum energy requirements may be more costly.
- Seasonality: The time of year you replace your windows can impact cost. Spring and summer are the busiest seasons for window replacement, so pricing is often higher, particularly contractor costs. The best time of year to replace windows is winter if your timeline and climate allow it. You may be able to get a deal on materials and from installers looking for work.
- Window location: Windows on the second floor or above, or in challenging spots, make installation more difficult and expensive.
What’s the Cost of Related Window Accessories?
You may need a few window accessories, such as budgeting for window screens, to finish off your window project. We shopped at Home Depot online to find average pricing for common window accessories.
| Accessories | Average Cost Range per window |
|---|---|
|
Blinds and window treatments |
$30–$170 |
|
Hardware |
$10–$50 |
|
Security bars |
$35–$80 |
|
Shutters |
$50–$250 |
|
Weatherstripping |
$10–$40 |
|
Window screens |
$15–$80 |
|
Window wells |
$200–$380 |
Retrofit Replacement Cost vs. Full-Frame Cost
Some homeowners can keep replacement window costs low by opting for retrofit installations. This installation method uses the existing window frame and trim and only removes the window sash. A retrofit installation can reduce window installation costs by up to 20%. If your current window frame and trim are in excellent condition, this replacement option will work best.
A full-frame installation could double the cost per window. In this replacement process, the window sash, trim, and frame are removed and replaced with new parts. The window frame and trim must then be stained to match the existing trim. A full-frame replacement is required if your current trim and frame are in poor condition.
How Much Should You Spend on Replacement Windows?
Your selected window style, material, glass type, and brand will most impact your window replacement cost. If you want a budget-friendly but reliable window, we recommend a vinyl, double-hung window with insulated glass and an Energy Star label. This is an energy-efficient, durable, long-lasting window option that won’t break the bank.
If you’re willing to pay a little more but want to spend wisely, we suggest upgrading to a fiberglass window in your chosen style, still with insulated glass and Energy Star certification. Fiberglass is a premium material that’s more attractive than vinyl but won’t warp or rot like wood.
Energy efficiency is the No. 1 quality not to skimp on if you want a good ROI, so be willing to alter your choices in other areas to prioritize this feature while staying within your budget.
The best way to find your window replacement cost is to get a quote from manufacturers that have what you’re interested in. We recommend getting quotes from a few window companies to compare pricing before making your decision.
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Expert Insights and Tips
Jessica is responsible for the complete portfolio of Andersen window and door products. She serves as a member of Andersen’s senior leadership team and on the board of directors of the St. Croix Valley Foundation. Jessica is also involved in Greater MSP Business Bridge and MBold, Environmental Initiative: Sustainable Growth Coalition, Council of Supply Chain Management Professionals (CSCMP), and the American Cancer Society. She received her bachelor of science degree in chemical and biological engineering from the University of Wisconsin-Madison.
FAQ About Window Replacement Costs
What are the cheapest windows you can buy?
The most cost-effective window replacement selection is an aluminum, single-hung window with single-pane glass. While you’ll pay less for this option upfront, it doesn’t have a big return on investment due to being low in energy performance. A more energy-efficient option that’s still budget-friendly is a vinyl, double-hung window with double-pane glass.
Does replacing windows increase home value?
The National Association of Realtors 2023 Cost vs. Value report showed that replacing vinyl windows added an average of $13,766 to resale value and wood windows added an average of $14,912.
Can I save money by installing windows myself?
DIY installation eliminates labor fees, which could save you a few hundred to a few thousand dollars depending on how many windows you’re installing. However, improper installation can leave you with even costlier issues down the line. Not only can unlicensed window installation void your manufacturer’s warranty if you ever need to file a claim, but not properly installing and sealing windows can cause air and moisture leakage issues that drive up your energy bills or cause mold to grow throughout your home.
How do I know when my windows need to be replaced?
Replace your home’s windows if there’s damage to the glass or framing, your home is drafty, your energy bills are rising, you spot condensation between the window panes, your windows are letting in moisture, or your windows allow in more noise pollution than you’re okay with.
Our Rating Methodology
The This Old House Team backs up our window ratings and recommendations with a detailed rating methodology to objectively score each provider. We conduct research by speaking with company representatives, browsing product selections, analyzing window line specifications, and conducting focus groups and consumer surveys. We then score each provider against our review standards for window variety, value, trustworthiness and transparency, window features, and customer service to arrive at a final score on a 5-point rating scale.
To share feedback or ask a question about this article, send a note to our team at reviews@thisoldhousereviews.com.
Sources
Cost Data
Energy Efficiency
Database of State Incentives for Renewables & Efficiency
Efficient Windows Collaborative
Energy Star window tax credits
Environmental Protection Agency
National Fenestration Rating Council
