Mahoney construction did multiple jobs for our school. Everything from interior carpentry, trim, door hanging, deck, building, and modular classroom construction. They are the most efficient contractor we?ve worked with. Their staff is very competent and professional!

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There are 3 highly-rated local window and door contractors.
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TRUSTED BY GREAT FALLS, MT HOMEOWNERS
4.7
Average homeowner rating67
Verified window and door contracting services reviews
Verified Reviews for Window And Door Contracting pros in Great Falls, MT
Last update on October 10, 2025
- Josh L.
- Lisa B.
Home Renovations did a great job from start to finish. Brad our salesman came through with answers, suggestions, and was very prompt. Our project was replacing 28 windows, two stories of metal siding, and rain gutters. The new windows keep the temperature more constant and it is so quiet. It...
- Sandra M.
Great cleaning job! Quick and arrived on time. The only negative is I told them I had windows 18 feet from the ground when I requested my bid but they said they would need to use a ladder and charged an extra $50. They did such a great job though so I would definitely recommend them.
- Stephanie C.
Mike Hagen (and all of his crew) are hands down the BEST contractors to work with. Mike is such a down to earth guy, and was so accommodating to build our house the way we wanted it! Even after the house was finished, he has been so responsive in coming to help us figure out the quirks of it...
- Scott B.
This is the second time I have hired Lee and his crew, he never disappoints, if it wasn't for the fresh paint smell and the cleanliness of the house you would have never known they were there. Very few contractors leave it better than they find it, but Lee's crew does. I hired them to paint...
- Darwin L.
I really like the owners. They were pleasant to deal with, even when we had problems. We did have some problems with the windows. They ordered windows that wouldn't work. It took a long time to get the right windows, and they had to eat the first windows. They weren't what they should have...
- Dale P.
Great. Impressed with the representative, Les and the professionalism of two guys who installed the new windows; and cleaned up after they were done. I would hire and recommend them to anyone.
- Sherry M.
Thanks to a friend who recommended him, I called Josh Calvert, and he came to my home to give me an estimate. (I had called another company for an estimate previously, and WITHOUT COMING TO MY HOME, their estimate was more than TWICE the estimate Josh quoted me. $1850!!) Josh told me what he...
- Joyce M.
Anything we asked of Vickie or her crew was done and done well. They replaced all of the screens, made sure that windows opened and cleaned up after themselves on a daily basis. I would certainly use them again.
Find Window and door contractors in Great Falls

Renewal by Andersen of Montana
Renewal by Andersen of Montana
Renewal by Andersen of Montana is the full service replacement division of Andersen Windows servicing the entire state of Montana with start to finish window and patio door replacement. We are the only replacement window on the market made of Fibrex material. All of our windows and doors are installed by our certified master installers. We offer free in-home estimates and have financing available.
"Our experience with RbA of Montana was wonderful. Major remodels (22 windows) can cause some anxiety. But we were kept informed every step of the way and the windows were installed quickly and efficiently. And we had NO finishing work to do when the crew left. Great experience!"
Marci W on October 2025
Renewal by Andersen of Montana is the full service replacement division of Andersen Windows servicing the entire state of Montana with start to finish window and patio door replacement. We are the only replacement window on the market made of Fibrex material. All of our windows and doors are installed by our certified master installers. We offer free in-home estimates and have financing available.
"Our experience with RbA of Montana was wonderful. Major remodels (22 windows) can cause some anxiety. But we were kept informed every step of the way and the windows were installed quickly and efficiently. And we had NO finishing work to do when the crew left. Great experience!"
Marci W on October 2025
VELUX America
VELUX America
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.

Renewal by Andersen
Renewal by Andersen
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
"We are extremely happy with how our new windows and new front door turned out. After some unexpected challenges with the way our home was built, our installation crew quickly and efficiently adapted to make sure our windows and door were installed with expert care. Every time we see our new beautiful picture window we are left breathless! And our beautiful front door is the perfect upgrade for the look of our home. Thank you RBA!"
JENNIFER S on August 2025
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
"We are extremely happy with how our new windows and new front door turned out. After some unexpected challenges with the way our home was built, our installation crew quickly and efficiently adapted to make sure our windows and door were installed with expert care. Every time we see our new beautiful picture window we are left breathless! And our beautiful front door is the perfect upgrade for the look of our home. Thank you RBA!"
JENNIFER S on August 2025

Goodsawyers LLC
Goodsawyers LLC
We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at Goodsawyers LLC strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.
"He had issues getting the supplies needed for the job, but kept in communication. He worked hard to complete the job , having to work around the weather. Plan to have him return next spring to do some more work."
Jean B on September 2024
We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at Goodsawyers LLC strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.
"He had issues getting the supplies needed for the job, but kept in communication. He worked hard to complete the job , having to work around the weather. Plan to have him return next spring to do some more work."
Jean B on September 2024
Sapphire Enterprises
Sapphire Enterprises
Handyman service with over 20 years of repairs, maintenance, and a passion for making things better. Trained in auto mechanics and construction with professionalism that only the military can instill.
Handyman service with over 20 years of repairs, maintenance, and a passion for making things better. Trained in auto mechanics and construction with professionalism that only the military can instill.
Ox-Glass
Ox-Glass
Hello I am regional sales consultant for Ox-Glass residing in Ravalli county. We have a great line up on life time warrantied Alside windows. Call or text for a consultation/quote tailored your home and your needs.
Hello I am regional sales consultant for Ox-Glass residing in Ravalli county. We have a great line up on life time warrantied Alside windows. Call or text for a consultation/quote tailored your home and your needs.
MMF Construction
MMF Construction
We are a commercial/residential construction company that we specialize in framing, tyvek, windows and sheetrock. We have 9 years of construction experience. We are a member-managed small business. We have a group of 25 guys.
We are a commercial/residential construction company that we specialize in framing, tyvek, windows and sheetrock. We have 9 years of construction experience. We are a member-managed small business. We have a group of 25 guys.
Montana Renovations and Contracting LLC
Montana Renovations and Contracting LLC
We specialize in home renovation from the ground up. We also offer small services such as repairs for doors, windows, hanging tvs, patching drywall, cleanups, or anything you may need a little professional help with or just don't have the time to do. We are locally owned and operated fully licensed and insured with over 20 years of experience in this industry. We also team up with other small businesses locally owned and operated to help get the projects completed in a timely fashion.
We specialize in home renovation from the ground up. We also offer small services such as repairs for doors, windows, hanging tvs, patching drywall, cleanups, or anything you may need a little professional help with or just don't have the time to do. We are locally owned and operated fully licensed and insured with over 20 years of experience in this industry. We also team up with other small businesses locally owned and operated to help get the projects completed in a timely fashion.
Joe Handyman
Joe Handyman
We have over 30 years of home improvement experience in the Helena area. We perform general handyman tasks including - Painting, Drywall, Siding, Gutter Cleaning, Gutter Repair & Replacement, Concrete Work, Windows, Doors, and Flooring. We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!
We have over 30 years of home improvement experience in the Helena area. We perform general handyman tasks including - Painting, Drywall, Siding, Gutter Cleaning, Gutter Repair & Replacement, Concrete Work, Windows, Doors, and Flooring. We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!
Sean's Handy Man
Sean's Handy Man
We are a handy man and remodling service but we can handle all you home repair needs big or small
We are a handy man and remodling service but we can handle all you home repair needs big or small
FAQs for window and door contracting projects in Great Falls, MT
Door installation usually takes three and four hours, including removing the old door and frame, fitting the new door and frame in place, shimming it to make sure it’s perfectly level, and making adjustments to the hinges and locking mechanisms to ensure proper functionality. A door-hanging professional can replace an interior door in between one and two hours. Door installation will take significantly longer if your installer needs to create a wall opening, and it can take less time if the existing door frame remains.
If you have a problem with your window, such as broken glass, minor leaks, or a problem with your window being stuck, repairing the broken part might be a cheaper option than replacing the entire window. However, if you have a deteriorating window frame or major leaks, buying a new window will be the better long-term solution.
The average cost to install a door is around $1,100, but you could pay anywhere from $150 for a hollow-core interior door installation up to $2,000 or a high-end exterior door installation. There are a few cost factors to consider to get an accurate price, including whether your wall opening exists, the type of door, the quality and security of the door, whether you need to replace the frame, and the door size. You can expect to pay $150 to $700 for a standard 36-by-80-inch door and between $400 and $1,600 for an 80-by-48-inch door.
Window replacement costs between $180 and $410 per window, or an average of $280 per window. However, your specific replacement job could cost as little as $100 or as much as $750. Factors such as frame material, the number of windows you need, and the type of glass you order all impact the overall cost. For example, simple double-glazed windows will cost $3 to $6 per square foot, but the stronger tempered glass ranges from $12 to $14 per square foot.
It’s possible to install a door yourself if the wall opening already exists, but the work is rather complicated, and a professional installation is usually well worth the investment. For your door to work and close properly, you’ll need to shim and level the door frame in your wall perfectly, which can be difficult. Additionally, we recommend you always hire a professional door installer to place an exterior door, as mistakes during the installation process can lead to poor security for your home.
The Great Falls, MT homeowners’ guide to window and door contracting services
From average costs to expert advice, get all the answers you need to get your job done.
When adding a fresh new entryway to your home, you may be curious about the cost of sliding glass doors. Let's break it down by size, style, and design.
Whether you’re installing a new door or replacing an existing one, the cost of door installation varies based on location, door type, framing needs, and other factors.
Create more usable space by installing a garage door screen, which allows for entertaining or working with plenty of fresh air and zero bugs. Here’s how much installing a garage door screen will cost you.
Use our guide to identify eight common door installation problems—and how to fix them.
You’re not imagining it: The door that previously fit your frame is suddenly too big. Learn how to fix a door that sticks using multiple methods here.
Is an unsightly hole in your interior door driving you crazy? Use this DIY guide on how to fix a hole in a door to get the job done in under an hour.
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