Established in 1977, Castle Windows is a family-owned company that offers various window options backed by a strong reputation and a lifetime warranty that covers parts and labor. Unlike most window brands, Castle’s window warranty doesn’t expire and isn’t prorated, so the company covers your new windows and any repair services for life. While Castle only sells vinyl frames, it offers a wide variety of window types and custom options that can keep you from feeling too limited.
Our Castle Windows review takes a look at the company’s window selection, including energy efficient offerings, as well as pricing, customer service, and reputation. We compiled our review after hours of research, secret shopping, and an analysis of our 2025 survey of recent window buyers. Learn more about Castle and how it compares to other top-rated window brands.
Castle
Pros and Cons
Pros
- Includes a limited lifetime warranty on all window sales
- Provides full-service replacement services
- Offers custom-built window options, such as transoms
Cons
- Only offers double-pane glass options
- Excludes single-hung window styles from its product lineup
- Only serves 11 U.S. states
Window Styles Offered
Castle Windows provides several specialty window styles alongside its standard offerings, such as dead-lite and transom windows. Here is the full list of window styles Castle offers:
- Awning
- Basement hopper
- Bay
- Bow
- Casement
- Dead-lite
- Double-hung
- Garden
- Slider
- Specialty
- Transom
Pros and Cons
Here’s a quick look at Castle’s strengths and weaknesses, including important things to consider before moving forward with this provider.
Pros
- Provides 24/7 customer support over the phone
- Extends a lifetime window warranty on parts and service
- Has the most affordable prices based on our homeowner survey, which covered 16 window brands
Cons
- Only sells vinyl windows, which offer less energy-efficiency than other window materials
- Has a limited service area of only 11 U.S. states, primarily the Northeast
What You Should Know
- Our rating: 4.7
- Price range: $100–$2,200
- Warranty: Lifetime transferable
- State availability: 11
Our Take on Castle
Castle Windows stands out for its customer service and lifetime warranty. To test out Castle’s customer service, we called its 24/7 customer service line multiple times and experienced no wait time. This can offer peace of mind for customers, especially when dealing with something as stressful as a broken window during storm season. We found Castle’s customer service representatives polite, well-informed, and easy to communicate with, which is a plus in our book.
In addition, Castle has a unique lifetime warranty that nearly no other window company we’ve reviewed matches. Castle’s warranty covers both parts and labor for a window’s lifetime, meaning you don’t have to worry about losing coverage over time or tricky exclusions, which is an issue with other providers.
Castle Windows offers a handful of energy-efficient vinyl window options, such as double-pane, extra-strong glass panes, and dual security locks, which can enhance home security and prevent air leaks. While Castle offers energy-efficient windows, we couldn’t find information about the company having ENERGY STAR-certified products on its website. Comparatively, Renewal by Andersen is an ENERGY STAR partner, and many of its lines meet related requirements, indicating greater energy efficiency benefits and savings. However, Castle’s lower price point makes it a more affordable choice for energy-efficiency that is protected by a true lifetime warranty.
Overall, Castle Windows is a standout company that we recommend to homeowners interested in vinyl windows in the Northeast or Mid-Atlantic regions. Castle handles every part of the window installation process—from manufacturing to consultation, installation, and post-installation protection—and offers a lifetime warranty for a one-stop-shop, white-glove experience.
We Recommend Castle If You:
- Want affordable vinyl windows
- Live in the Northeast or Mid-Atlantic regions of the U.S.
- Value a true lifetime warranty for peace of mind
We Don’t Recommend Castle If You:
- Want the most energy-efficient window options on the market
- Prefer windows made from materials other than vinyl
- Need a company that offers deferred payment options
Window Types Available
Castle offers several types of windows, including the ones listed below. Note that Castle only manufactures vinyl windows, so you won’t find wood, fiberglass, and other material options.
- Awning: Awning windows open outwardly, creating an “awning” effect. These windows are ideal for airing out the home.
- Bay and bow: Bay and bow windows consist of multiple window panes, and can create a cozy nook in the home that allows for a lot of natural light. For these windows, Castle uses real oak veneering to add elegance to the outside of your home.
- Basement hopper: Castle designs basement hopper windows with double weather stripping, maintenance-free vinyl frames, and insulated glass. This window type is ideal for basements, bathrooms, or other areas requiring ventilation.
- Casement: This provider offers single, double, and three- or more casement windows. Castle constructs these windows with durable stainless steel hardware for smooth operation and increased security.
- Dead-lite or picture: Dead-lite windows, also known as picture windows, are inoperable. These windows don’t open because they’re permanently sealed shut, creating a clear, unobstructed view of the outside with increased security.
- Double-hung: These popular windows feature two operable sashes that slide up and down with a virtually maintenance-free construction thanks to Castle’s durable vinyl and tilt-in sash.
- Garden: Garden windows provide a sturdy plant shelf or nook for plants, making this a common choice for the kitchen.
- Slider: Slider windows glide open, creating a modern look while allowing fresh air into your home.
- Transom: Transom windows get installed above the horizontal beam that separates the top of the window or door from the remainder of the wall. These windows bring natural light and unique visual appeal to a space.
Castle also creates custom windows in addition to the types listed above, allowing the company to address nearly all your window type needs.
Window Features
Castle uses a high-performance heat-resistant window trim that it says is guaranteed not to crack, pull away from the seal, or warp even in higher temperatures—ideal for homeowners in hot climates. Castle provides energy-efficient options with double-strengthened panes of glass and a tight interlock system that prevents air infiltration and enhances security. We also like that many of Castle’s windows include tilt-in top and bottom sashes, allowing for easy access for cleaning.
Castle Windows Cost
Like most window providers, Castle Windows offers custom pricing, meaning you must complete an in-home consultation to receive a free estimate. However, our 2025 survey of 1,000 windows customers showed the average cost of a Castle Window is $411 per individual unit. This is one of the most affordable prices we’ve come across, as many brands, such as Pella and Marvin, charge closer to $600—$750 per window.
The average total cost of a window replacement project with Castle was $6,131, with an average of 12 windows purchased, which is very competitive. Many other reputable companies, such as Andersen Windows and Pella, charged over $7,000 on average per project, so Castle was notably less expensive than most brands in our homeowner survey.
Financing Options
In addition to its more affordable pricing, Castle Windows offers multiple financing options. This provider offers qualified buyers 100% financing with no down payment, works with local and regional banks to provide other financing options, and accepts various credit cards. For exact details, speak with your Castle representative during your in-home consultation.
Discounts
Castle Windows doesn’t disclose discounts online but a representative can discuss financing options with interested buyers during consultations.
Warranty Coverage
Castle offers true lifetime warranty coverage that few other window companies can match, based on our research. Castle provides coverage on the following for the entire life of your window:
- Color
- Colored windows
- Glass
- Installation
- Leaks and drafts
- Operation of window
- Parts
- Screens
- Seals
- Vinyl
Homeowners can transfer a Castle window warranty for no extra fee and coverage isn’t pro-rated, meaning the warranty doesn’t lose value over time. Castle also provides free labor on all warranty services, which most companies make you pay for if you need window replacements. Based on our team’s extensive research, Castle provides one of the best warranties in the industry. Plus, Castle provides 24-hour customer service, so you can get a hold of the provider anytime you have warranty questions.
Materials
Castle Windows specializes in vinyl windows with low-emissivity (low-E) double-pane glass. Our team found that this provider offers fewer window material options than other brands. For example, Renewal by Andersen provides both double-pane and triple-pane glass windows. Still, Castle is a more affordable option with a plethora of window types that can suit most homeowner needs. Castle Window energy-efficient options are solid but not as extensive as Renewal by Andersen and some competitors, so you may want to consider other companies if you’re looking for luxury windows with top-of-the-line energy-efficient features.
Window Frames
Castle Windows only manufactures vinyl windows. While this may feel limiting for some homeowners, vinyl is one of the most common window frame types and can offer benefits such as durability, easy cleaning, and low maintenance.
Energy Efficiency
Our 2025 homeowner survey revealed that many homeowners upgrade their windows to improve home energy efficiency and save on energy costs. Castle offers the following features, which can enhance your home’s comfort and energy efficiency.
- Low-e coatings: Low-e coatings decrease energy loss by approximately 30%–50%. This thin, invisible coating lowers solar heat gain through windows during the summer while keeping your home warm during the winter. Low-e coating reduces energy bills, increases indoor climate comfort, and decreases fabric fading in the house.
- Argon gas fills: Argon gas is clear, non-toxic, and odorless gas placed between window layers to enhance thermal performance. This gas fill allows space for thermal expansion and pressure differences and decreases the risks of air and moisture leaks.
- Double-pane windows: Windows with two or more panes of glass are considered insulated. Double pane windows are spaced apart, creating an insulating air space, which lowers the window’s U-Factor, which measures how much heat enters the window.
Castle Customer Reviews: Reddit, BBB, Yelp, and More
As of this writing, Castle Windows holds an A- rating from the Better Business Bureau (BBB) with 3.3 out of 5 stars based on customer reviews and 3.4 out of 5 stars on Trustpilot.
Positive reviews have reported satisfaction with Castle’s lifetime warranty coverage and a quick installation process. Customers said that the company honors its warranty coverage, which is important to consider when making a significant home improvement purchase. Many reviewers also said that installers went above and beyond to protect their home during the installation process and vacuumed afterward. On the negative side, some reviewers shared problems with pushy salespeople and repeated phone calls after they requested a free quote.
Here are a few customer reviews that highlight repeat themes we noticed about Castle’s service:
“I used Castle Window for my home. I am so pleased with them. [The] crew was great. They were on time and professional. The crew got to work right away laying down plastic to cover the floor and furniture. They also vacuumed up when they were done. The windows look great and I will be calling them again for future projects. I am one happy customer.” —Cynthia T. via the BBB, November 2024
“This company will not stop calling me. I have asked multiple times over the years, even blocking their number and they continue to call me. The best is the last time they called me I said to remove me from their call list, again, and they proceeded to tell me about their ‘special offer.’ Only give your name to this company if you want to be constantly harassed.” —Derek S. via the BBB, January 2024
Window Series
Castle Windows sells a line of vinyl windows that come in eight different styles and specialty options, such as transom and dead-lite windows. The company also offers custom window types.
Other Services
In addition to windows, Castle offers a wide variety of steel and fiberglass doors with a focus on security. Its team of installers can also tackle roof replacement and vinyl siding. Castle crafts its siding with high-quality vinyl that can protect your home against fading and distortion due to extreme weather conditions. All of its other services come with a worry-free warranty, although coverage details are less defined on the company’s website than with its window warranty.
Castle Quote and Installation Process
Castle offers a free quote by calling its 24/7 customer service line or filling out a request form on its website. The information required to start this process is standard, such as your name, phone number, address, and email.
Once a representative reaches out to you, the company can schedule a free consultation at your home to examine your windows, speak about different options, and provide a window cost and installation estimate. Once you’ve agreed on your project details, the representative will order your windows and schedule an installation crew. After its team installs your windows, Castle offers a lifetime warranty that covers window parts, glass, labor, condensation, and more. The warranty is also transferable to the next homeowner if you sell your house after an installation, which is a plus for your home’s resale value.
How Castle Compares to Other Top Window Companies
Castle stands out against the competition for its true lifetime warranty and 24/7 customer service, making it one of our preferred window providers. However, the company only operates in 11 U.S. states. If you’re located outside the Northeast, where Castle Windows services, our top recommendation is Renewal by Andersen, which also has a 4.7 out of 5 star rating based on our review. Renewal by Andersen also provides a unique composite window material that is more energy efficient than vinyl, although it costs more than Castle on average.
Use the chart below to compare Castle against our other top-rated window brands, including some of the most affordable replacement window options.
| Brand | Our Score (Out of 5) | Avg. Window Cost | Warranty Type | State Availability |
|---|---|---|---|---|
| $412 | Lifetime transferable | 11 | |
$612 | Limited transferable | 47 | ||
$421 | Limited lifetime transferable | 50 | ||
$660 | Limited lifetime transferable | 31 | ||
 | $550–$849 | Lifetime transferable | 22 |
Note: We gathered the above pricing information from our 2025 survey of 1,000 window buyers nationwide based on their most recent project costs.
FAQs About Castle Windows
How much does a Castle window cost?
A standard Castle window costs a little over $400, according to our 2025 homeowner survey of window customers nationwide. We found that homeowners typically spend around $6,131 in total on a window project with Castle, which includes buying around 11 windows on average.
Which is better—vinyl or aluminum windows?
Vinyl windows may work better for many homeowners because they require little to no maintenance, come in many aesthetic options, offer solid energy efficiency benefits, and cost less. However, aluminum windows offer more durability, which is often a good choice for homes in areas with extreme weather conditions. If you’re interested in vinyl windows, Castle offers some of the most affordable, customizable options on the market.
Where does Castle make its windows?
Castle Windows manufactures its windows in North America, according to its website, which includes the entire process of designing and engineering to testing and manufacturing.
Does Castle Window’s warranty cover labor?
Yes, Castle Window’s lifetime warranty covers window parts and labor costs, so you won’t owe an additional fee if Castle technicians service your windows.
How We Evaluated Window Brands
Our team evaluates window brands based on detailed research, secret shopping, conversations with window experts, and an analysis of our 2025 survey of 1,000 recent window customers. This information has helped us learn about current window buying trends and prices.
Our Rating System
Based on our team’s research, we created a detailed rating system based on six factors that reflect what homeowners prioritize when shopping for windows. We weighed the following factors to create star ratings for each window company based on a 5-point scale.
- Value: We looked at quality and cost to strike a balance between finding affordable yet high-quality windows. Our survey revealed that homeowners prioritized durable, high-quality windows that reduce energy costs over affordability alone. On average, we considered windows priced at $700 or less a good value, based on buyers in our survey paying between $338 and $987 per window. We also weighed discounts and financing options.
- Performance: Energy efficiency was among the most important factors when window shopping for homeowners in our 2025 survey. As a result, we heavily considered window brands with energy efficiency benefits, like low-E glass, double or triple pane glass, and argon gas fill—all of which Castle Windows offers—and a lifetime warranty. Lifetime warranties relieve stress about your window warranty not expiring.
- Selection: Our team awarded more points to providers with more customization options, window types, materials, and styles. Castle Windows performed well in this category for its customization, style, and window types but lost some points for lacking options outside of vinyl windows. However, vinyl is one of the most popular window materials, so this isn’t necessarily a downside.
- Services: A window company received high marks for good service based on whether it offers in-house installation, which can save homeowners from dealing with multiple contractors. Castle handles everything from manufacturing to installation in-house, earning it points in this category.
- Customer support: We awarded companies more points for providing 24/7 customer service and a variety of ways to get a hold of a representative, such as online chats and service forms.
