Best Replacement Windows (2025 Guide)

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. Renewal by Andersen states on its website 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 it has some customizations built 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. An added 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.

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

Another reason why we believe Renewal by Andersen is the best replacement window brand is because 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 worked on removing and installing 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 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. 

Additionally, we found that Castle charges slightly higher prices on average compared to other brands. According to our 2024 survey respondents who bought Castle windows over the last five years, they paid between $300 and $2,325 per window on average. Note that the high end of Castle’s window prices is more than the average window replacement cost of $1,500 and $2,000 per window, based on our survey analysis.

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 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 under a minute. The representatives who helped us were friendly and knowledgeable and answered all our questions thoroughly.

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 independently get a loan from your bank. Additionally, Champion regularly offers discounts on its windows, which can help you save even more on your home improvement project.

However, at the time 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, where it boasts 4.1 out of 5 stars with nearly 4,000 reviews, and found more favorable impressions from customers.

Champion offers glass block windows, a good choice for privacy and moisture resistance. We also like that Champion offers up to 11 window styles, including:

• Awning
• Basement hopper
• Bay 
• Bow
• Casement
• Double-hung 
• Garden
• Glass block
• Picture
• Shaped
• Sliding

Our team used Champion’s free quote tool and found that it took slightly longer to fill out than other brands. That said, Champion’s 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 details 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 World is a good choice for homeowners seeking affordable replacement windows. Our research shows that it charges between $300 and $1,450 per window on average, which is the lowest range of all the brands we’ve reviewed. Although Window World offers low-priced windows, we found the company still meets the energy efficiency requirements set by Energy Star and the National Fenestration Rating Council.

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.

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

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.

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.

As mentioned above, 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

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. This consultation allows the installers to assess your home and measure your windows before providing an accurate quote.