20 Best Window Companies in Longmont, CO (2024 Reviews)
When the time comes to replace your windows, our list of the top window installation companies can help you find the right provider for you.
We analyzed all the top-rated window companies in Longmont and selected the best 20 based on:
- Customer reviews
- Window installation expertise
- Popularity with home-owners like you
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Updated February 01, 2024
Why you can trust EcoWatch
Whether you're updating for aesthetics or have windows that need repairs, windows play a crucial role in conserving your home's electricity. Damaged or outdated windows could lead to having higher electric bills during the winter or summer months.
Replacement windows improve your home’s insulation, not only making you more comfortable during extreme temperatures, but also saving you money and helping the environment.
So if you’re building a new home, renovating or replacing your windows in Longmont, this is the best place to get started.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Longmont
The EcoWatch Reviews team researched dozens of window providers across Longmont to narrow our list down to the best ones. The installers reviewed in this article scored best in our categories: energy-efficient offerings, price, availability, customer service and more.
Renewal by Andersen
- Great industry reputation
- Award-winning company
- Member of US Green Building Council
- Manufactures products in-house
- No lifetime warranty
- More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This provider has 27 years of experience in the windows business, and it has become one of the most respected companies in Longmont.
If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, this may be the perfect provider for you.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen’s commitment to sustainability shows in its energy-efficient window offerings. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.
How much does Renewal by Andersen cost in Longmont?Prices are not available on Andersen’s website since the cost of window replacement differs based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to get more accurate pricing information is to request a free quote from the company.
Window World
- EnergyStar Partner
- Large serice area
- Low prices relative to competitors
- Great industry reputation
- Lifetime warranty
- Quality of service will depend on your area
Window World is the largest window replacement company in the country, known for its vinyl windows and affordability. This provider has 27 years of experience in the windows business, and it has become one of the most respected companies in Longmont.
If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, this may be the perfect provider for you.
Energy Efficiency of Window World WindowsWindow World’s commitment to sustainability shows in its energy-efficient window offerings. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in Longmont?Prices are not available on Window World’s website since the cost of window replacement differs based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to request a free quote from the company.
Universal Windows Direct
- Makes charitable contributions
- Manufactures products in-house
- Wide variety of products and services
- Lifetime warranty
- Limited service area
- Some installations carried out by third-party contractors
- Quality of service will depend on your area
Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This provider has 20 years of experience in the windows business, and it has become one of the most respected companies in Longmont.
If you’re looking for a company that has an industry-leading warranty covering products, parts and workmanship for life, this may be the perfect provider for you.
Energy Efficiency of Universal Windows Direct WindowsUniversal Windows Direct’s commitment to sustainability shows in its energy-efficient window offerings. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.
How much does Universal Windows Direct cost in Longmont?Prices are not available on Universal’s website since the cost of window replacement differs based on how many and what type(s) of windows you need. However, installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. The best way to get more accurate pricing information is to request a free quote from the company.
Please note that the companies in this section are national, meaning the quality of customer service may depend on your local crew. We have tried to remain unbiased and transparent by listing pros and cons for every company.
More Window Companies in Longmont
Renewal by Andersen Window Replacement
Longmont, CO- Good Customer Service
- Price Transparency
- Free assessment
Services Offered
- Bay Windows
- Aluminum Frames
- Andersen
- Vinyl Frames
- Energy-Efficient Options
- Window Install & Replacement
- Sliding Glass Doors
Champion Replacement Windows of Ft. Collins
Loveland, CO- Good Customer Service
- Free assessment
- Price Transparency
Services Offered
- Storm Doors
- Double-Hung
- Window Repair
- Window Install & Replacement
- Sliding Glass Doors
- Bay Windows
Window World of Denver
Denver, CO- Price Transparency
- Educational Website
- Timely Service
- Good Customer Service
- Free assessment
Services Offered
- Double-Hung
- Energy-Efficient Options
- Sliding Glass Doors
- Bay Windows
- Window Install & Replacement
- Custom Window Designs
- Glass Doors
Champion Replacement Windows of Denver
Denver, CO- Free assessment
- Good Customer Service
- Price Transparency
Services Offered
- Double-Hung
- Window Install & Replacement
- Sliding Glass Doors
- Window Repair
- Storm Doors
- Bay Windows
Window Nation
Aurora, CO- Price Transparency
- Educational Website
- Free assessment
- Good Customer Service
Services Offered
- Energy-Efficient Options
- Sliding Glass Doors
- Bay Windows
- Window Install & Replacement
- Custom Window Designs
- Double-Hung
Rocky Mountain Glass & Shower LLC
Longmont, CO- Educational Website
- Good Customer Service
- Free assessment
- Price Transparency
Services Offered
- Mirrors
- Energy-Efficient Options
- Tempered Glass
- Commercial Windows
- Custom Glass
- Window Install & Replacement
- Glass Showers
- Window Repair
WestPro | Roofing, Siding, Windows
Longmont, CO- Educational Website
- Good Customer Service
- Free assessment
- Price Transparency
Services Offered
- Commercial Windows
- Residential Windows
- Window Install & Replacement
Slade Glass Co.
Longmont, CO- Free assessment
- Good Customer Service
- Educational Website
- Price Transparency
Services Offered
- Glass Showers
- Window Install & Replacement
- Sliding Glass Doors
- Commercial Windows
- Glass Doors
- Mirrors
- Energy-Efficient Options
- Aluminum Frames
BlueBird Windows & Doors
Lafayette, CO- Free assessment
- Good Customer Service
- Educational Website
- Price Transparency
Services Offered
- Commercial Windows
- Bay Windows
- Fiberglass Frames
- Storm Doors
- Window Install & Replacement
- Double-Hung
Josh Brooks Construction and Renovation
Longmont, CO- Timely Service
- Educational Website
- Good Customer Service
- Free assessment
- Price Transparency
Services Offered
- Commercial Windows
- Stained Glass
- Glass Showers
- Window Install & Replacement
- Energy-Efficient Options
- Residential Windows
Glass Doctor Home + Business of Boulder
Boulder, CO- Good Customer Service
- Educational Website
- Price Transparency
Services Offered
- Commercial Windows
- Glass Repair
- Custom Glass
- Window Repair
- Mirrors
- Tempered Glass
- Window Install & Replacement
- Glass Showers
Custom Exteriors
Berthoud, CO- Good Customer Service
- Free assessment
- Timely Service
- Educational Website
- Price Transparency
Services Offered
- Commercial Windows
- Window Install & Replacement
- Sliding Glass Doors
- Custom Window Designs
- Vinyl Frames
- Window Repair
- Glass Doors
Ameritech Windows
Boulder, CO- Price Transparency
- Educational Website
- Good Customer Service
- Free assessment
- Timely Service
Services Offered
- Andersen
- Bay Windows
- Energy-Efficient Options
- Triple Pane Glass
- Custom Window Designs
- Window Install & Replacement
- Storm Doors
Window Well Replacement LLC
Berthoud, CO- Good Customer Service
- Price Transparency
- Free assessment
Services Offered
- Window Install & Replacement
Loveland Window Cleaning Services
Loveland, CO- Good Customer Service
- Free assessment
Services Offered
- Commercial Windows
- Window Install & Replacement
3 Bidz Windows
Loveland, CO- Price Transparency
- Free assessment
- Educational Website
- Good Customer Service
Services Offered
- Window Install & Replacement
Performance Windows
Broomfield, CO- Free assessment
- Good Customer Service
- Price Transparency
- Educational Website
Services Offered
- Window Install & Replacement
Window & Siding Outlet
Loveland, CO- Free assessment
- Good Customer Service
- Price Transparency
- Educational Website
Services Offered
- Window Install & Replacement
- Sliding Glass Doors
Home Services at The Home Depot
393 S Hover Road, CO- Free assessment
- Price Transparency
- Good Customer Service
- Educational Website
Services Offered
- Glass Showers
- Window Install & Replacement
- Mirrors
New Windows for America
Brighton, CO- Educational Website
- Good Customer Service
- Price Transparency
- Free assessment
Services Offered
- Sliding Glass Doors
- Window Install & Replacement
- Glass Doors
- Commercial Windows
- Energy-Efficient Options
Calculate how much you can expect to pay for window installation and replacement in Longmont, CO using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in Longmont Saves You Money
When you upgrade to energy-efficient windows, you may see several perks, such as:
- Reduce your carbon footprint: Because energy-efficient windows improve the insulation in your house, you can lower your indirect greenhouse gas emissions by about 12%, according to Energy Star.
- Save on electricity bills: Because energy-efficient windows lower how much energy you need to heat or cool your home, the switch can help you save around $449 annually on your energy bills in Longmont.
- Protect your investment: Upgrading your windows is an important part of maintaining your property and its real estate value, especially if you have an older home.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only insulate your home better, but also filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
Estimated Cost of Window Replacement in Longmont
Windows come in varying shapes, purposes and styles, so costs and services will differ considerably depending on your project. Below, we describe the average cost and services that you’ll find from window installation companies.
How Much Do New Windows Cost?
The typical cost to install a single window is about $600 but can range anywhere from $200 to $1,200. This is because the cost of window installations are based on a variety of factors specific to your home, such as the size, material and number of windows you need to install, as well as the location of your property.
It’s also worth bearing in mind that energy-efficient windows will typically cost more upfront, but Energy Star estimates that switching out the windows on your Longmont home translates to an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. The amount of money you’ll save by installing energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.
Something else that influences the overall cost is the material of the frame you choose. Aluminum frames are typically the least pricey and are sturdy and relatively maintenance-free, but they offer poor insulation. On the other hand, wood frames are the most expensive, as they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.
What Services do Window Installers Offer?
The first thing to ask yourself when getting new windows is: Do you want a full-frame installation or a pocket installation?
Full-frame installations entail replacing the full window, including the sill, frame and trim. Full-frame installations are necessary when you want a new style or your window has noticeable rot. These installations are more involved and will increase overall costs. Pocket installations (also known as retrofits) are when you replace a window while leaving the existing frame. Pocket installations are simpler and will be less expensive, but you can’t do this kind of installment if you have any pre-existing rot or water damage.
If you’re still debating which kind of installation you should get, you can talk to your installer and get their recommendation. The choice mostly depends on the age of your window frames and if there’s any damage.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Longmont
EcoWatch reviews are different from most reviews, as we’re examining these companies through a sustainability lens. Along with energy efficiency, we analyzed each installer and assigned rankings using the following methodology:
Service Area
This one is pretty self-explanatory, but we’ve chosen to highlight window installers that serve the Longmont area so you can find a quality window installation company near you.
Work Quality
When choosing new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the brand you opt for. We do give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed patterns in recent online reviews to find the companies with the most consistent customer satisfaction, weighted by sample size. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across most other categories, including quality of installation, cost, professionalism, warranty, quality of parts and more.
Cost
This one is a give-and-take: as with most services, cheap window installation companies may not provide the most quality service. On the other hand, we want to ensure we’re highlighting companies that offer a variety of price and financing options so they’re accessible to most homeowners.
Warranty
Protecting your investment in new windows is important to many homeowners. That’s why window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have been in the industry for a while. Window installers that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.
Longmont, CO Window Replacement FAQs
How much does a window install cost?
The national average cost of replacing a window is about $600 but can range between $200 and $1,200, depending on a few different factors. The price is typically influenced by the type and material of the window, the location of your property and the size of the window. Also, remember that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.
What are the most common kinds of replacement windows?
The most common kinds of windows for homes include: picture windows, transom windows, slider windows, awning windows, double-hung and single-hung windows, casement windows and bay windows.
Do I really have to use a window installation company?
Unless you’re handy and have all the necessary tools to replace your own windows, we recommend hiring a professional installer. The window installation process is quite involved and can take anywhere from four to six hours for one window. Although it’s tempting to try to save money by doing it yourself, hiring a professional is a faster, more efficient and much safer alternative.
What time of year is a good time to replace my windows?
Though you can install windows any time of year, warmer weather is generally better for installing replacement windows. In addition, it shouldn’t be raining, as rain can make the installation more difficult.
Should I replace my windows all at the same time?
If you’re upgrading your windows to save on your energy bills, replacing all of your windows at once is the only way to see a noticeable difference. On the other hand, if you have just a few windows that are damaged or leaky, you can replace just those.