One of the biggest home improvement investments homeowners can make is replacing their windows. This project involves many variables, including which type of window to buy, what frame material to use, and which brand to choose. Our team determined that Renewal by Andersen provides the best replacement windows after reviewing more than a dozen window companies. It offers premium windows in various trims and styles. It uses in-house installers to replace your windows, saving you time otherwise spent searching for a reputable contractor.
During our research, we reviewed various companies’ warranty terms, analyzed more than 1,500 customer reviews, and compared window offerings. Additionally, we surveyed 1,000 homeowners who bought replacement windows within the last five years to understand the window-buying process and customer preferences better.
This guide explains why we recommend each replacement window company, helping you determine which one may best suit your home.
Pros
- Features proprietary window frame material that is stronger and more durable than vinyl
- Includes a transferable 20-year warranty on glass and a 10-year warranty on non-glass materials
- Provides full-service window replacement services
Cons
- Doesn’t sell aluminum, fiberglass, or wood frame windows
- Provides fewer window styles than other brands
- Average Price per Window: $612
- BBB Rating: A+
- Warranty: 20-year glass/frame, 2-year labor, 10-year hardware
- Best For: Full-service installation
- State Availability: 47 states
Renewal by Andersen offers up to eight window styles, which you can customize to fit your home’s aesthetic. Here is the full list of window styles Renewal by Andersen offers:
- Awning
- Bay
- Bow
- Casement
- Double-Hung
- Picture
- Sliding
- Specialty
Top Replacement Window Companies
Of the 16 window brands we’ve reviewed, the following five companies offer the best replacement windows:
- Renewal by Andersen: Best Installation
- Castle: Best Warranty
- Window World: Most Budget-Friendly
- Champion: Best Financing
- Window Nation: Best Discounts
Comparing the Top Five Window Brands
Our market research and 2025 survey data helped us determine which factors homeowners find most important when shopping for new windows. Renewal by Andersen is the best window installation company for replacement windows because of its solid warranty terms, durable windows, and professional full-service installation.
However, other window brands may better suit your specific needs. The table below provides an overview of how each replacement window brand compares against several key categories.
| Company | Logo | Our Score | Average Price Range | Warranty Type | State Availability |
|---|---|---|---|---|---|
Renewal by AndersenGet Quote |  | $1,200+ | Limited transferable | 47 | |
CastleGet Quote |  | $550–$849 | Lifetime transferable | 11 | |
Window WorldRead Our Review |  | $550–$850 | Limited lifetime transferable | 50 | |
ChampionGet Quote |  | $600–$900 | Limited lifetime transferable | 31 | |
Window Nation |  | $550–$849 | Lifetime transferable | 22 |
Our Reviews of Replacement Window Brands
We reviewed 16 window companies before choosing our top five recommended replacement brands. Each review details what we think is most important to know about the company, such as its standout features, pros and cons, and available window options, as well as reasons why it might not be right for you.
Renewal by Andersen
Average Cost per Window: $612
BBB Rating: B+
Warranty: Limited lifetime transferable
Pros and Cons
Pros
- Brings a British Thermal Unit (BTU) meter to consultations to demonstrate energy performance
- Provides in-house installation, so you won’t have to hire a contractor
- Uses highly durable composite framing on all windows
Cons
- Has a limited warranty compared to other window brands we’ve reviewed
- Takes longer to build and install windows than other companies
Renewal by Andersen Overview
Renewal by Andersen is our pick for the best replacement window company for several reasons, the biggest of which is its use of proprietary Fibrex frame material. On its website, Renewal by Andersen states that Fibrex is twice as strong as vinyl window frames, making it suitable for extremely hot or cold climates. The company can customize the Fibrex frame with multiple colors and grille designs, and some customizations allow its windows to look like traditional wood windows.
Renewal by Andersen provides full-service window installation, meaning it will send trained technicians to your home to remove your old windows, install new ones, and provide a thorough cleanup. A bonus to its full-service installation is a two-year labor warranty in case customers experience issues down the road.
While Renewal’s Fibrex windows are highly customizable, the company doesn’t offer certain window styles, such as single-hung or garden windows. If these styles suit your needs, consider other window brands, such as Castle for garden windows or Window World for single-hung versions.
Window Types Offered
Renewal by Andersen offers several of the most common window types you can have in your home, including awning and double-hung windows. Below is the full list of window types the company sells:
- Awning
- Bay
- Bow
- Casement
- Double-hung
- Picture
- Sliding
- Specialty
Our Experience With Renewal by Andersen
Another reason why we believe Renewal by Andersen is the best replacement window brand is that we’ve seen its window installation process firsthand, interacted with the company, and interviewed customers who have purchased its windows.
During our team’s window installation ride-along, we saw the level of professionalism and care each Renewal by Andersen window installer displayed as they removed and installed new windows. The installers double- and triple-checked their measurements to ensure the windows they installed fit properly.
Two of our team members purchased replacement windows from Renewal, so we interviewed them to see if their experience mirrored ours. Both team members said their assigned installation crews performed the job efficiently and with minimal disruption to their homes.
Castle
Average Cost per Window: $412
BBB Rating: A+
Warranty: Lifetime transferable
Pros and Cons
Pros
- Has 24/7 customer support that allows customers to call anytime
- Offers a lifetime warranty, which covers all aspects of the window for its lifespan
- Provides a 0% down loan option, so you can buy windows with no cash upfront
Cons
- Only sells vinyl windows, which may not meet your needs
- Services 11 states, which is the fewest of the brands we reviewed
Castle Overview
Castle is another solid window company that offers full-service window replacement. Like Renewal by Andersen, Castle manufactures its own windows and offers installation using trained in-house installers. Castle is the only window company we’ve reviewed that offers a true lifetime warranty on all its windows, including installation. This means that Castle will service your windows if there is a defect free of charge for the life of the window. Due to its robust warranty, Castle is a good option if you want a window with generous post-installation support.
However, Castle only makes vinyl windows, which may not suit every homeowner’s needs. While vinyl frames are generally affordable, energy-efficient, and durable, other frame materials, such as wood or fiberglass frames, can provide better insulation and structural stability.
Window Types Offered
While reviewing Castle’s website, we found that it offers up to 11 window styles, which is slightly more than what some brands offer. We like that the company sells unique window types, such as basement hopper and transom windows. Below is the full list of window types Castle offers:
- Awning
- Basement hopper
- Bay
- Bow
- Casement
- Dead lite
- Double-hung
- Garden
- Slider
- Specialty
- Transom
Our Experience With Castle
Our team called Castle’s 24/7 customer service phone number to get an idea of what a typical homeowner would experience during the buying process. Each time we called Castle, we connected with a representative in less than a minute. The representatives who helped us were friendly and knowledgeable and answered all our questions thoroughly.
Window World
Average Cost per Window: $421
BBB Rating: A+
Warranty: Limited lifetime transferable
Pros and Cons
Pros
- Offers one of the most affordable replacement windows of the companies we’ve reviewed
- Provides discounts and a 0% interest loan to help fit various budgets
- Sells a large variety of window types
Cons
- Sells only one window frame material, vinyl
- Varies its limited lifetime warranty terms based on location
Window World Overview
Window World is a good choice for homeowners who want affordable replacement windows. Our research shows that it charges an average of $421 per window, one of the lowest prices of all the brands we’ve reviewed. Although Window World offers affordable windows, the company still meets the energy efficiency requirements set by Energy Star and the National Fenestration Rating Council (NFRC).
We also like that Window World offers up to 11 window styles, but it only sells vinyl window frames. If you live in harsh climates, we recommend Renewal by Andersen, as its Fibrex windows can withstand more years of extreme heat or cold compared to vinyl windows.
Window Types Offered
While reviewing Window World’s website, we found that it offers fully customizable architectural shaped windows, such as circle or angular windows. Other companies we’ve reviewed don’t specify whether or not they offer shaped windows. Here are Window World’s available style options:
- Architectural shapes
- Awning
- Basement hopper
- Bay
- Bow
- Casement
- Double-hung
- Garden
- Picture
- Single-hung
- Sliding
Our Experience With Window World
We explored Window World’s website to evaluate its quote process and customer service quality. We noticed that the company provides limited details about its lifetime warranty. The website advises users to contact a local Window World location for more comprehensive warranty information. In contrast, other brands we’ve reviewed have full warranty details readily available online.
Window World’s quote process is similar to that of other window brands. You simply fill out an online form with your contact information. After submitting the form, a representative should contact you to schedule an appointment with a design consultant. The consultant discusses window options and helps place your order.
Champion
Average Cost per Window: $660
BBB Rating: NR
Warranty: Limited lifetime transferable
Pros and Cons
Pros
- Offers more financing perks than other window brands we’ve reviewed
- Provides a solid window and labor warranty
- Sells unique window styles, such as glass block windows
Cons
- Doesn’t offer showrooms and services in all 50 U.S. states
- Only sells vinyl windows, which can limit options for homeowners
Champion Overview
Although Champion ranked third on our list of the best replacement windows, it’s still a worthwhile brand to consider if you want quality vinyl windows. The company installs its windows itself, which can save you the time and headache of searching for an authorized installer.
What makes Champion stand out is its financing options—unlike some other brands, Champion offers loans with a 0% interest rate. We also like that Champion handles financing in-house, so you don’t have to get a loan from your bank independently. Additionally, Champion regularly offers discounts on its windows, which can help you save even more on your home improvement project.
However, as of this writing, the company has an NR rating with the BBB and a pattern of complaints related to delayed communication and install dates. We checked Champion’s Trustpilot page, which boasts a rating of 4.1 out of 5 stars and nearly 4,000 reviews, and found more positive customer impressions.
Window Types Offered
Champion offers glass block windows, a good choice for privacy and moisture resistance. We also like that Champion offers up to 11 window styles:
- Awning
- Basement hopper
- Bay
- Bow
- Casement
- Double-hung
- Garden
- Glass block
- Picture
- Shaped
- Sliding
Our Experience With Champion
Our team used Champion’s free quote tool and found that it took slightly longer to complete than other brands. That said, the tool provided helpful visual cues during each step of the quote process. We like that Champion lists applicable discounts for every service it offers. In addition, you can select the number of windows you need replacing within the tool.
Once you choose your project details, the quote tool provides various time slots to schedule a consultation with your local Champion branch. From there, you provide additional information about yourself and your home and then submit your quote. When we spoke to a Champion representative, they said the company confirms your appointment within 24–48 hours of receiving a consultation request.
Window Nation
Average Cost per Window: $1,162
BBB Rating: A+
Warranty: Limited lifetime transferable warranty
Pros and Cons
Pros
- Offers many customization options for its windows
- Provides discounts to seniors and military members
- Sells wood windows, which offer a more classic look for your home
Cons
- Doesn’t sell common window types, including single-hung or picture windows
- Requires a two-window minimum to schedule a consultation
Window Nation Overview
Window Nation is the final replacement window company we recommend. Unlike other companies, Window Nation sells its own windows alongside name-brand windows, which are available in wood, fiberglass, and vinyl frames. This makes it the only brand on our list to sell wood windows, which homeowners may appreciate for their classic look. Although Window Nation only makes vinyl windows, we found that you can customize them in many ways, including frame color, glass patterns, and grid options.
However, we found that Window Nation offers a limited number of window types. For example, it doesn’t offer single-hung or picture windows, both common in homes. We also dislike that the company doesn’t offer a labor warranty for its windows, unlike most replacement brands we recommend.
Window Types Offered
Window Nation offers fewer window styles than other brands, although we found it does sell common window types that suit most homes, such as awning and bay windows. Here’s the full list of window types Window Nation has available:
- Awning
- Bay
- Bow
- Casement
- Double-hung
- Garden
- Sliding
- Specialty
- Vent
Our Experience With Window Nation
Window Nation’s online form makes it easy to request an in-person consultation. Unlike other window brands, it requires minimal personal information—just your name, email, phone number, and zip code. During this consultation, the Window Nation representatives will assess your home, measure your windows, and then provide an accurate quote.
How Much Do Replacement Windows Cost?
Respondents to our 2025 window survey reported paying an average of $554 per window, excluding installation costs. They also reported spending an average of $120 per hour in installation costs. However, replacement window costs can vary significantly based on multiple factors, including the window type, frame material, labor needed, glass type, and brand.
The table below shows the average prices our survey respondents reported paying based on the style of windows they bought.
| Style | Average Cost Per Window |
|---|---|
| Basement hopper | $252 |
| Awning | $288 |
| Single-hung | $336 |
| Sliding | $339 |
| Casement | $344 |
| Double-hung | $357 |
| Transom | $430 |
| Egress | $473 |
| Shape | $510 |
| Glass block | $540 |
| Picture | $775 |
| Specialty/custom | $825 |
| Bay | $1,131 |
| Bow | $1,299 |
Costs are from our 2025 window survey of 1,000 homeowners.
What Factors Affect the Cost of Replacement Windows?
According to Amanda Winship, the national sales director of Renewal by Andersen, various factors affect the cost of replacement windows, such as the type of window and the installation method.
Some factors affect the price of replacement windows more than others. For example, the type of window and frame material will usually determine total costs more so than the glass type you choose. Below, we detail the main factors that influence replacement window costs.
Type of Window
The type of window you buy is the biggest factor affecting your replacement costs. Larger windows with multiple panes and design elements, such as bow windows, will typically cost more than smaller, simpler windows. When shopping for new windows, consider the value and use you’d get from the window style you want. For example, a simple picture window can provide curb appeal and practicality similar to a custom-shaped window for a fraction of the cost.
Type of Frame Material
The frame material you choose for your new windows also directly affects replacement costs. Our research found that aluminum frames were the most affordable, while composite frames were the most expensive. The table below shows the average prices our survey respondents paid based on frame material.
| Material | Average Cost Per Window |
|---|---|
| Aluminum | $501 |
| Vinyl | $558 |
| Wood | $646 |
| Fiberglass | $651 |
| Composite | $655 |
Glass Type
The glass you choose for your replacement windows is another factor that can raise or lower replacement window costs. The window brands we feature in this article all offer double-pane glass for their windows, which is cheaper than triple-pane glass.
Our research shows that double-pane windows provide nearly the same level of energy efficiency as triple-pane windows in most climates. However, triple-pane windows make the most sense for areas that experience extremely hot or cold seasons. The table below shows the average prices our survey respondents paid based on the number of glass panes they bought for their windows.
| Number of Glass Panes | Average Cost Per Window |
|---|---|
| Single-pane | $450 |
| Double-pane | $539 |
| Triple-pane | $766 |
Companies also offer specialty glass treatments, such as tempered, frosted, and laminated glass. Expect to pay more per window if you add these glass treatments to your window order.
Installation Method
Another factor affecting the total cost of replacement windows is the installation method required. Winship said that Renewal by Andersen’s design consultants considers a home’s design when determining installation costs. She added that installation crews may need to use additional equipment to install windows for homes with multiple stories, which increases costs.
Warranty Options
We compared the prices and warranties of 15 window brands and found that the level of coverage a company provides in its warranty terms also affects the cost of replacement windows. Generally, companies that offer window warranties for both the window and installation—such as Castle—tend to charge more per window. We recommend companies that offer both a window and installation warranty since this can provide better value and protection for your investment.
Energy Efficiency
The final key factor that affects replacement window costs is how energy efficient it is. Generally, energy-efficient windows come standard with various features, such as double-pane glass and low-emissivity (low-e) glass coatings. Every brand we featured in this article has solid Energy Star ratings and certifications with the National Fenestration Rating Council (NFRC).
Steve Urich, the Chief Program Officer for the NFRC, stated that the glass you choose for your windows makes the biggest difference in energy efficiency. Urich recommended selecting the glass that best suits the window’s location in your home. “If your dining room is on the west side of your house and you have a window there when you’re sitting down for dinner, the sun’s going to be shining in there,” Urich said. “Ideally, you’d want to limit that solar heat gain on that window or on that elevation a little bit more than you do on the north side of your house,” he added.
What To Consider When Choosing a Window Company
Choosing a trustworthy window installer may seem difficult if you don’t know where to start. Here are some tips to help you make the right decision:
- Reputation and reviews: Reading online customer reviews can give you insight into the company’s reputation. Look for feedback on installation quality and customer service. Complaints centered on these factors may be a sign to explore other options.
- Experience and certifications: An experienced installer will have years of expertise and can confidently answer any questions you have about the process. If an installer hesitates when answering questions or has limited experience, consider looking elsewhere.
- Product selection and customization: Ensure that the window company you’re interested in has the window types, frame materials, and customization options you want. The last thing you want is to spend thousands of dollars on windows that don’t suit your home’s look or energy efficiency needs.
- Warranty and guarantees: Before committing to a window brand, ask about the types of warranties and guarantees it offers. If you’re using your own installer, ensure that the brand you want won’t void its warranty due to your installation choice.
- Installation process and expertise: Reputable installers will gladly describe their process and provide instructions on how to prepare for installation day. Avoid companies that don’t disclose any information on installation.
- Verify licensing and insurance: Ensure the company has the proper licenses required by your state and carries business insurance. This protects you in case of accidents or issues during the installation.
Questions To Ask a Replacement Window Company
Installing new windows is a big project that has its fair share of risks if you don’t do proper research on hiring a reputable company, such as overspending or poor installation. Asking a window replacement company the right questions can help you avoid hidden costs, low-quality products, and poor installation quality. Here are some important questions to ask the window installer you’re considering:
- Do you offer energy-efficient windows? Windows with features such as low-e coatings, double- or triple-panes, and gas fills can significantly lower your heating and cooling bills. Ask if the company carries Energy Star-rated windows to ensure you’re getting an energy-efficient option.
- What do you include in the quote? Some companies advertise a low price but don’t include extras like removal of old windows, trim work, or warranties. Get a detailed quote upfront so you won’t be surprised by hidden costs later.
- What kind of warranty do you offer? A reputable window company provides both a window warranty and a labor warranty for the installation. This protects you from defects and installation mistakes. Ask how long the warranty lasts and what it covers.
- How long will the installation take? Our research shows that professional window installations can take up a few hours per window, but the full project timeline depends on how many windows you’re replacing. Asking this upfront helps you plan for any disruptions.
- Do you have references or reviews? A reputable company should have customer reviews, testimonials, or references from past clients. This gives you an idea of their work quality and customer service. Be cautious if they refuse to provide references.
- How do you handle problems or repairs after installation? If there’s an issue after the installation—like air leaks, condensation between panes, or difficulty opening the window—you’ll want to know how the company handles repairs. Make sure it stands behind its work.
FAQs About Replacement Windows
What are the most efficient replacement windows?
Energy-efficient replacement windows typically have double or triple glass panes, low-emissivity (low-E) coatings, and argon or krypton gas fills. Reputable brands such as Renewal by Andersen, Castle, and Window World offer highly rated energy-efficient options designed to reduce heat loss and improve comfort.
How much should you spend on replacement windows?
Our 2025 survey of 1,000 window customers showed that the majority of respondents paid between $554 per window. Many high-quality brands offer windows at around this price without skimping on quality, such as Renewal by Andersen, Window World, Champion Windows, and Castle. These companies fall in the $412–$660 range on average per window.
Which type of frame material should I choose for my replacement windows?
Each window frame material has pros and cons. Vinyl is affordable and low-maintenance, wood offers a classic aesthetic and natural insulation, and fiberglass provides exceptional durability and energy efficiency. Your choice depends on your priorities and budget.
How do I choose the best replacement windows for my home?
To choose replacement windows, start by considering your budget, home style, and specific needs, such as energy efficiency, durability, or noise reduction. Look for reputable brands, compare warranties, and ensure that an installation company installs the windows to maximize their performance.
Our Rating Methodology
The This Old House Reviews 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.