Top-rated window pros.

Get matched with top window pros in Longmont, CO

There are 35 highly-rated local window pros.

Need a pro for your window service project in Longmont, CO?

Select your specific project to find the pro for you.

TRUSTED BY LONGMONT, CO HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon606
    Verified window services reviews

Find Window pros in Longmont

Avatar for Champion Windows and Home Exteriors of Ft. Collins

Champion Windows and Home Exteriors of Ft. Collins

5850 Byrd Dr
4.58(
209
)
Approved Pro

Champion Windows and Home Exteriors of Ft. Collins

5850 Byrd Dr
4.58(
209
)
Approved Pro
Customers say: Quality work
53 local quotes requested
72 years of experience

There’s never been a better time to transform you home with Champion of Ft. Collins! Think of us as a one-stop shop for everything you need to beautify your home’s exterior: windows, sunrooms, siding, roofing and doors. Only Champion offers the superior energy efficiency of Comfort 365 Windows, industry-leading limited lifetime guarantee, and award winning products made in the USA. For over 60 years, Champion has been manufacturing and installing quality windows, doors and sunrooms while creating a seamless experience for our customers. More than 9 out of 10 customers recommend Champion. Not only do Champion products enhance your curb appeal, but can also lower your energy bills, improve the comfort level of your home and reward you with a high return on your investment. Experience the difference Champion products can make for your home today! ENERGY STAR®, NSA, AAMA, Installation Experts, VSI, BBB, NFRC

"Corinna was very knowledgeable and nice to work with and knew a lot about the windows. She sold me on the warranty and how it would extend the life of my home and energy efficiency."

Chris N on June 2025

There’s never been a better time to transform you home with Champion of Ft. Collins! Think of us as a one-stop shop for everything you need to beautify your home’s exterior: windows, sunrooms, siding, roofing and doors. Only Champion offers the superior energy efficiency of Comfort 365 Windows, industry-leading limited lifetime guarantee, and award winning products made in the USA. For over 60 years, Champion has been manufacturing and installing quality windows, doors and sunrooms while creating a seamless experience for our customers. More than 9 out of 10 customers recommend Champion. Not only do Champion products enhance your curb appeal, but can also lower your energy bills, improve the comfort level of your home and reward you with a high return on your investment. Experience the difference Champion products can make for your home today! ENERGY STAR®, NSA, AAMA, Installation Experts, VSI, BBB, NFRC

"Corinna was very knowledgeable and nice to work with and knew a lot about the windows. She sold me on the warranty and how it would extend the life of my home and energy efficiency."

Chris N on June 2025


Avatar for Skylight Specialists, Inc.

Skylight Specialists, Inc.

10658 W Centennial Rd
4.69(
58
)
Approved Pro

Skylight Specialists, Inc.

10658 W Centennial Rd
4.69(
58
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
15 local quotes requested

Skylight Specialists, Inc., is a family-owned & operated skylight company based in Littleton, CO, with offices in Fort Collins, CO, Colorado Springs, CO, Albuquerque, NM, and Austin, TX. We repair, replace and install all residential and commercial skylights. With the support of a thoroughly-trained and highly skilled crew of in-house technicians, we have special teams of experts dedicated to each of our commercial & residential divisions that are fully equipped with the knowledge and experience necessary to see your project through. Since 1980, Skylight Specialists, Inc. has redefined “living space” and brought light to our customer’s lives. Backed by over 35 years of experience & over 22,000 customers, we are the nation’s #1 skylight resource.

"Jenna was very knowledgeable & thorough in explaining my current skylight issues (never sealed properly) & what solutions & options are appropriate for my size skylights & warranties. Jonathan, David & Alejandro did an awesome installation, respectful of my property, meticulous in their work & went above & and beyond, in my opinion. Communication was always excellent throughout. Highly recommend."

Susan D on April 2025

Skylight Specialists, Inc., is a family-owned & operated skylight company based in Littleton, CO, with offices in Fort Collins, CO, Colorado Springs, CO, Albuquerque, NM, and Austin, TX. We repair, replace and install all residential and commercial skylights. With the support of a thoroughly-trained and highly skilled crew of in-house technicians, we have special teams of experts dedicated to each of our commercial & residential divisions that are fully equipped with the knowledge and experience necessary to see your project through. Since 1980, Skylight Specialists, Inc. has redefined “living space” and brought light to our customer’s lives. Backed by over 35 years of experience & over 22,000 customers, we are the nation’s #1 skylight resource.

"Jenna was very knowledgeable & thorough in explaining my current skylight issues (never sealed properly) & what solutions & options are appropriate for my size skylights & warranties. Jonathan, David & Alejandro did an awesome installation, respectful of my property, meticulous in their work & went above & and beyond, in my opinion. Communication was always excellent throughout. Highly recommend."

Susan D on April 2025


Avatar for GS Exterior Experts

GS Exterior Experts

9083 W Peakview Dr
4.70(
141
)
Approved Pro

GS Exterior Experts

9083 W Peakview Dr
4.70(
141
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
149 local quotes requested

GS Exterior Experts is a Local exterior remodeling company since 1999 specializing in Residential FULL HOUSE SIDING REPLACEMENT-WINDOWS-DECKS & ROOFING. View some of our reviews and you will see that we consistently exceed our expectations! Our customers come first, and every job is complete in a timely manner with 100% satisfaction. We offer free estimates and financing on all our services and insure you our prices are the best and most important quality. We are honored to win the Angie's list super service award every year since 2011. We are also a James Hardie ELITE preferred contractor in CO which means you get the best of James Hardie installations with a full non pro rated warranty. GS Exterior Experts is licensed and insured BBB members with very good customer satisfaction rating. Setting ourselves apart by offering unique craftsmanship installation, providing your home unique curb appeal that sets your home apart from your neighbors for years to come.

"Category: Siding, Roofing, Gutters, Deck Work Overall Rating: A Price: A Quality: A Responsiveness: A Punctuality: A Professionalism: A After moving to Boulder, we hired GS Exteriors to install James Hardie siding, a Class 4 roof, soffits, gutters, and make deck improvements. They did excellent work, responded quickly to all concerns, and their team was professional from start to finish. Special thanks to: • Oswald, our project manager, who was calm, professional, and true to his word • Erwin, who showed up daily and gave 100% • Wesley, the foreman, who went above and beyond • Jon Virgil, who supported us from beginning to end Highly recommended. Great value, great team, and great results!"

John R on July 2025

GS Exterior Experts is a Local exterior remodeling company since 1999 specializing in Residential FULL HOUSE SIDING REPLACEMENT-WINDOWS-DECKS & ROOFING. View some of our reviews and you will see that we consistently exceed our expectations! Our customers come first, and every job is complete in a timely manner with 100% satisfaction. We offer free estimates and financing on all our services and insure you our prices are the best and most important quality. We are honored to win the Angie's list super service award every year since 2011. We are also a James Hardie ELITE preferred contractor in CO which means you get the best of James Hardie installations with a full non pro rated warranty. GS Exterior Experts is licensed and insured BBB members with very good customer satisfaction rating. Setting ourselves apart by offering unique craftsmanship installation, providing your home unique curb appeal that sets your home apart from your neighbors for years to come.

"Category: Siding, Roofing, Gutters, Deck Work Overall Rating: A Price: A Quality: A Responsiveness: A Punctuality: A Professionalism: A After moving to Boulder, we hired GS Exteriors to install James Hardie siding, a Class 4 roof, soffits, gutters, and make deck improvements. They did excellent work, responded quickly to all concerns, and their team was professional from start to finish. Special thanks to: • Oswald, our project manager, who was calm, professional, and true to his word • Erwin, who showed up daily and gave 100% • Wesley, the foreman, who went above and beyond • Jon Virgil, who supported us from beginning to end Highly recommended. Great value, great team, and great results!"

John R on July 2025


Avatar for DaBella - Denver

DaBella - Denver

6000 GREENWOOD PLAZA BLVD
4.56(
105
)
Approved Pro

DaBella - Denver

6000 GREENWOOD PLAZA BLVD
4.56(
105
)
Approved Pro
Customers say: Quality work
672 local quotes requested
14 years of experience

Quality Begins at Home. We are the premiere home improvement company, with service and products that will keep you happy for years to come. Our customers receive unmatched warranties and exclusive products. We offer exclusive roofing, siding and window systems that are manufactured in America and installed by factory-trained installers, delivering the best possible result every time. DaBella Baths is our exclusive bath division, specializing in tub and shower conversions, bathtub replacement, walk-in showers and walk-in tubs. If you want to work with a contractor who is passionate about service, committed to quality and determined to delight you, then DaBella is for you! We’re ready to turn your dreams into a beautiful reality.

"I had siding replaced and very displeased with the entire process. The crew did a poor job for what I paid and have already had to be back out here 3 times in a month to fix their mistakes. Crew cheif never checked the work to determine if the quality was up to the company standard. The crew left the property a mess with my belongings scattered around the yard. They had leftover pieces scattered as well. The craftsmanship and quality was aubpar for the price. No care for the property. Damaged driveway, roof, windows, and garden bed. Chalking already cracking. Large gaps in the siding. Siding already buckeling. Seams not together. Asked to speak to a manager or supervisor multiple times and still no response. I was promised certain tasks at point of sale that company will not follow up on. Over all this company treats their customers as money and gets in and out with little oversight or quality check. I am very displeased with the product I got for the money I paid. Will never recommend."

Chase W on July 2024

Quality Begins at Home. We are the premiere home improvement company, with service and products that will keep you happy for years to come. Our customers receive unmatched warranties and exclusive products. We offer exclusive roofing, siding and window systems that are manufactured in America and installed by factory-trained installers, delivering the best possible result every time. DaBella Baths is our exclusive bath division, specializing in tub and shower conversions, bathtub replacement, walk-in showers and walk-in tubs. If you want to work with a contractor who is passionate about service, committed to quality and determined to delight you, then DaBella is for you! We’re ready to turn your dreams into a beautiful reality.

"I had siding replaced and very displeased with the entire process. The crew did a poor job for what I paid and have already had to be back out here 3 times in a month to fix their mistakes. Crew cheif never checked the work to determine if the quality was up to the company standard. The crew left the property a mess with my belongings scattered around the yard. They had leftover pieces scattered as well. The craftsmanship and quality was aubpar for the price. No care for the property. Damaged driveway, roof, windows, and garden bed. Chalking already cracking. Large gaps in the siding. Siding already buckeling. Seams not together. Asked to speak to a manager or supervisor multiple times and still no response. I was promised certain tasks at point of sale that company will not follow up on. Over all this company treats their customers as money and gets in and out with little oversight or quality check. I am very displeased with the product I got for the money I paid. Will never recommend."

Chase W on July 2024


Avatar for Window Nation Denver

Window Nation Denver

2450 Airport Blvd
New on AngiNew on Angi
Approved Pro

Window Nation Denver

2450 Airport Blvd
New on AngiNew on Angi
Approved Pro
117 local quotes requested
19 years of experience

At Window Nation, we know replacement windows. We’re third-generation window replacement experts who have been lucky to provide homeowners replacement windows, siding, and doors for over fifteen years. We opened our first showroom in Maryland in 2006, quickly growing to serve homeowners in cities across the country – and we’re not stopping there. We’re grateful for every homeowner who has trusted us to upgrade their most important asset: their home. We’ve learned a lot about home improvement over the years, but the most important thing we learned isn’t about window replacement. We learned the home improvement industry isn’t about offering the best windows, siding and doors; it’s about the relationships we build with our customers.

At Window Nation, we know replacement windows. We’re third-generation window replacement experts who have been lucky to provide homeowners replacement windows, siding, and doors for over fifteen years. We opened our first showroom in Maryland in 2006, quickly growing to serve homeowners in cities across the country – and we’re not stopping there. We’re grateful for every homeowner who has trusted us to upgrade their most important asset: their home. We’ve learned a lot about home improvement over the years, but the most important thing we learned isn’t about window replacement. We learned the home improvement industry isn’t about offering the best windows, siding and doors; it’s about the relationships we build with our customers.


Avatar for Power Home Remodeling

Power Home Remodeling

7304 S Joliet St
4.67(
155
)
Approved Pro

Power Home Remodeling

7304 S Joliet St
4.67(
155
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
134 local quotes requested

As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, siding, doors, or attic insulation.

"Everything went great. I'm always impressed with this company. From the door knockers who are fun and friendly to the the sales team who always answer all my questions to the install crews who always do a fabulous job! By taking the time to double check and measure twice they were able to save me over $800."

Paulette S on September 2025

As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, siding, doors, or attic insulation.

"Everything went great. I'm always impressed with this company. From the door knockers who are fun and friendly to the the sales team who always answer all my questions to the install crews who always do a fabulous job! By taking the time to double check and measure twice they were able to save me over $800."

Paulette S on September 2025


VELUX America

2173 HAWKINS ST STE H
New on AngiNew on Angi
Approved Pro

VELUX America

2173 HAWKINS ST STE H
New on AngiNew on Angi
Approved Pro
595 local quotes requested

Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.

Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.


Avatar for Bellwether Homes

Bellwether Homes

3839 Newport St
4.74(
19
)
Approved Pro

Bellwether Homes

3839 Newport St
4.74(
19
)
Approved Pro
Customers say: Quality work
20 local quotes requested
8 years of experience

Bell Wether Homes is a James Hardie Elite Preferred Contractor and 2024 winner of James Hardie's prestigious President's Club award, Pella Platinum Elite Certified Contractor and GuildQuality's prestigious GuildMaster award. We are your trusted guide for siding and window and replacement in the Denver area. Call today for a free estimate!

"We were very pleased with their work, timing, and quality of workmanship. We have received many positive comments on the appearance of our home. It is a great feeling to look at the home and know it has been sealed well against the weather and elements. We are very glad we chose a long-life product and an experienced team to install it. We would readily recommend Colorado Siding Repair to anyone who wants a quality product installed well at competitives prices, by folks with great integrity."

Scott E on November 2019

Bell Wether Homes is a James Hardie Elite Preferred Contractor and 2024 winner of James Hardie's prestigious President's Club award, Pella Platinum Elite Certified Contractor and GuildQuality's prestigious GuildMaster award. We are your trusted guide for siding and window and replacement in the Denver area. Call today for a free estimate!

"We were very pleased with their work, timing, and quality of workmanship. We have received many positive comments on the appearance of our home. It is a great feeling to look at the home and know it has been sealed well against the weather and elements. We are very glad we chose a long-life product and an experienced team to install it. We would readily recommend Colorado Siding Repair to anyone who wants a quality product installed well at competitives prices, by folks with great integrity."

Scott E on November 2019


Avatar for EGRESS INC

EGRESS INC

2963 W 91st Pl
4.84(
67
)
Approved Pro

EGRESS INC

2963 W 91st Pl
4.84(
67
)
Approved Pro
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
17 local quotes requested

Adding a professionally installed egress window & well not only protects your family by providing a reliable escape, it also transforms your basement living area with beautiful, natural light. Egress, Inc is the largest egress window & well specialist in the Rocky Mountain Region. From simple expansions to engineer structural modifications, Egress Inc has the knowledge and experience to professionally & efficiently handle all your egress window & well needs. In addition to egress windows our services include water mitigation, replacement windows and walkout basement options, in addition to replacement window wells of any size, in a variety of options including steel, fiberglass, concrete and custom-designed & hand-built stone and timber. Owners Jim & Loralee Dischner share their 30 years of construction & public relations experience to provide you with expert installations and outstanding customer service. Licensed & insured, we guarantee our work which helps ensure your ultimate satisfaction. Egress, Inc supports trusted and caring employees, not fly-by-night subcontractors. The Egress, Inc family sincerely cares about your project work together to make it flow seamlessly from start to finish. Let Egress, Inc transform your basement into a beautiful and safe living area!

"They are fantastic workers. I felt so comfortable with Jim, the boss and his crew, I left for work for a few hours."

Nancy D on March 2022

Adding a professionally installed egress window & well not only protects your family by providing a reliable escape, it also transforms your basement living area with beautiful, natural light. Egress, Inc is the largest egress window & well specialist in the Rocky Mountain Region. From simple expansions to engineer structural modifications, Egress Inc has the knowledge and experience to professionally & efficiently handle all your egress window & well needs. In addition to egress windows our services include water mitigation, replacement windows and walkout basement options, in addition to replacement window wells of any size, in a variety of options including steel, fiberglass, concrete and custom-designed & hand-built stone and timber. Owners Jim & Loralee Dischner share their 30 years of construction & public relations experience to provide you with expert installations and outstanding customer service. Licensed & insured, we guarantee our work which helps ensure your ultimate satisfaction. Egress, Inc supports trusted and caring employees, not fly-by-night subcontractors. The Egress, Inc family sincerely cares about your project work together to make it flow seamlessly from start to finish. Let Egress, Inc transform your basement into a beautiful and safe living area!

"They are fantastic workers. I felt so comfortable with Jim, the boss and his crew, I left for work for a few hours."

Nancy D on March 2022


Avatar for Clear View Windows Limited LLC

Clear View Windows Limited LLC

123 Main St.
New on AngiNew on Angi
Approved Pro

Clear View Windows Limited LLC

123 Main St.
New on AngiNew on Angi
Approved Pro
17 local quotes requested
Free onsite estimate

We are a Pella Approved Contractor. We install Pella brand windows-vinyl, wood, and fiberglass. We pride ourselves on the quality work we provide, while delivering great customer service! Call -or- click to schedule an estimate today!

We are a Pella Approved Contractor. We install Pella brand windows-vinyl, wood, and fiberglass. We pride ourselves on the quality work we provide, while delivering great customer service! Call -or- click to schedule an estimate today!

...
Showing 1-10 of 229
Windows questions, answered by experts

Installing bifold windows can take anywhere from three or four hours to several days. Smaller bifold windows that open vertically and fit inside your existing wall opening should take just a few hours and no longer than a day. Larger bifold windows, especially wider ones, may require structural work before your professional can install the window. The installation could take two to three days, depending on how much work your wall needs.

You should avoid abrasive materials when cleaning windows, including scrubbing pads that can scratch the glass and harsh chemical cleaners that have alcohol or ammonia in them, as these can damage window treatments and frame materials. It’s best to use a clean microfiber cloth to clean glass and old black and white newspapers to dry it without leaving streaks.

Modern windows provide enhanced UV protection, improved heat retention, and cooling efficiency, contributing to overall household energy savings.

High winds can be harmful to casement windows and all types of windows. Because casement windows can swing outward, high winds could slam the window against the side of the house, bend the hinges, or even rip the window off of the hinges. If you hear some strong gusts outside, it’s best to pull the casement windows shut until it all blows over.

Actually, condensation can mean that your windows are more energy efficient because the seal keeps cold air out and warm air in. In some cases, windows with poor seals can lead to more condensation, but they may allow the cold and warm air to mix and reduce condensation. If you’re worried about whether or not your windows are properly insulated, have a pro assess them.

By submitting this question, I acknowledge and agree that Angi may publicly display my name, city, state, and question on the website for professionals and others to see.

The Longmont, CO homeowners’ guide to window services

From average costs to expert advice, get all the answers you need to get your job done.