Our experience from start to finish was outstanding.We hired David and his team to install a front door and sidelights They were extremely understanding when we had issues with a door we ordered from an outside company being delayed. When door and sidelights arrived they gave us a date and...

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TRUSTED BY ALTON, NH HOMEOWNERS
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Average homeowner rating245
Verified window and door contracting services reviews
Verified Reviews for Window And Door Contracting pros in Alton, NH
Last update on October 11, 2025
- Ann Marie S.
- Dan T.
Very satisfied with the job Mark did installing our new garage doors. His price was fair and he came when he said he would and left the work area very clean. I would recommend M&L Roth to anybody.
- Matthew D.
The guys at KCP did a fantastic job! They worked around my busy schedule and were on time every day. They worked quickly and neatly, minimizing the impact to our daily lives. At the completion of the job the manager walked me through everything they completed and even took care of a few...
- Patricia M.
This is the second time we have used the Window Doctor and we wouldn't think of using anyone else for our doors and windows. Jayme is meticulous and takes pride in his work. He doesn't just do the work - he dos it the right way which will save money for his customers in the long run. He's...
Find Window and door contractors in Alton
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.
Wagner Home Renovation
Wagner Home Renovation
Remodeling, General Construction and Carpentry. Sole Proprietor, but works with other subcontracted building professionals and uses licensed subcontractors for plumbing and Electrical work. Works hourly and/or provides free estimates, and free consultation. Strong emphasis on quality workmanship, and has solid references. All work is guaranteed accompanied by workmanship warranty specific to the job compleeted. We stand behind our product. Asa is an easy going carpenter who is a serious builder. Family man with three children and a dog. Provides homemade canned goods, jams, and honey for his best clients.
"HVAC system inspection"
Russel C on December 2020
Remodeling, General Construction and Carpentry. Sole Proprietor, but works with other subcontracted building professionals and uses licensed subcontractors for plumbing and Electrical work. Works hourly and/or provides free estimates, and free consultation. Strong emphasis on quality workmanship, and has solid references. All work is guaranteed accompanied by workmanship warranty specific to the job compleeted. We stand behind our product. Asa is an easy going carpenter who is a serious builder. Family man with three children and a dog. Provides homemade canned goods, jams, and honey for his best clients.
"HVAC system inspection"
Russel C on December 2020

Mel Martin Windows LLC
Mel Martin Windows LLC
At Mel Martin Windows LLC, we pride ourselves on being Manchester’s premier destination for top-quality windows and doors. Our mission is to enhance the beauty and efficiency of your home with our wide selection of products that blend innovative design with classic style. Our Products: Energy-Efficient Windows: Designed to withstand New Hampshire’s varied climate, our windows offer superior insulation, reducing your energy bills and increasing your comfort. Durable Doors: From elegant front entryways to secure back doors, our products promise longevity and performance. Custom Installations: Our experienced team provides professional installation services, ensuring a perfect fit and finish every time. Expert Consultations: We offer personalized consultations to help you choose the right products for your home’s aesthetics and your budget. Our Commitment: As a locally owned and operated business, we understand the unique needs of Manchester homeowners. Customer Satisfaction: Your satisfaction is our top priority. We strive to exceed expectations with our quality products and exceptional service. Contact us to schedule an in-home estimate. Let Mel Martin Windows LLC transform your home today!
"I want to give my highest possible recommendation for Craig at Mel Martin Windows! I hired them when I found significant rot and decay in the wood around my front door. Craig came to our home, evaluated the situation and created a great plan to fix everything. We ended up replacing the wood around the door and installing an entirely new door. Craig did an exceptional job at recreating the decorative brick mold we had on the door frame by using PVC products. He corrected all the previous issues and now gave us a new solution that will withstand the weather for years to come. Extremely happy with his professionalism, punctuality, flexibility and pricing. He is a true craftsman and a pleasure to do business with. Very pleased with how our project turned out."
Ryan N on June 2024
At Mel Martin Windows LLC, we pride ourselves on being Manchester’s premier destination for top-quality windows and doors. Our mission is to enhance the beauty and efficiency of your home with our wide selection of products that blend innovative design with classic style. Our Products: Energy-Efficient Windows: Designed to withstand New Hampshire’s varied climate, our windows offer superior insulation, reducing your energy bills and increasing your comfort. Durable Doors: From elegant front entryways to secure back doors, our products promise longevity and performance. Custom Installations: Our experienced team provides professional installation services, ensuring a perfect fit and finish every time. Expert Consultations: We offer personalized consultations to help you choose the right products for your home’s aesthetics and your budget. Our Commitment: As a locally owned and operated business, we understand the unique needs of Manchester homeowners. Customer Satisfaction: Your satisfaction is our top priority. We strive to exceed expectations with our quality products and exceptional service. Contact us to schedule an in-home estimate. Let Mel Martin Windows LLC transform your home today!
"I want to give my highest possible recommendation for Craig at Mel Martin Windows! I hired them when I found significant rot and decay in the wood around my front door. Craig came to our home, evaluated the situation and created a great plan to fix everything. We ended up replacing the wood around the door and installing an entirely new door. Craig did an exceptional job at recreating the decorative brick mold we had on the door frame by using PVC products. He corrected all the previous issues and now gave us a new solution that will withstand the weather for years to come. Extremely happy with his professionalism, punctuality, flexibility and pricing. He is a true craftsman and a pleasure to do business with. Very pleased with how our project turned out."
Ryan N on June 2024

Romeo's Windows
Romeo's Windows
We are a small, father and son window and door company servicing NH, MA and southern ME. Available for phone calls any day and time and offering our services Monday through Saturday (phone and emails on Sundays as well). We provide high end services at affordable prices and always make sure our customers are satisfied before we leave any job. Please consider using Romeo Vanegas, LLC Custom & Replacement Windows and Doors for your next home improvement project and we look forward to hearing from you.
"He only emailed ask few questions and sent a very high estimate"
Jhony C on August 2020
We are a small, father and son window and door company servicing NH, MA and southern ME. Available for phone calls any day and time and offering our services Monday through Saturday (phone and emails on Sundays as well). We provide high end services at affordable prices and always make sure our customers are satisfied before we leave any job. Please consider using Romeo Vanegas, LLC Custom & Replacement Windows and Doors for your next home improvement project and we look forward to hearing from you.
"He only emailed ask few questions and sent a very high estimate"
Jhony C on August 2020

Clear Choice Home Improvements
Clear Choice Home Improvements
Clear Choice Home Improvements is New Hampshire's largest and New England's fastest growing Home Improvement Company. Family owned and operated, we provide truly personalized home remodeling services. At Clear Choice, we pride ourselves on presenting the best quality replacement windows, vinyl siding, roofing, bathroom systems, and gutter guards. Clear Choice will ALWAYS install these products in your home as if we were putting them into our own. Should those products ever need service, Clear Choice will ALWAYS be there to take care of any problems. We're confident that the home improvement products we install in your home are the absolute best in the industry.
"This company should not be in business. By far the worst interaction I’ve ever had with a sales person for my entire life. Do not use this company."
John O on September 2024
Clear Choice Home Improvements is New Hampshire's largest and New England's fastest growing Home Improvement Company. Family owned and operated, we provide truly personalized home remodeling services. At Clear Choice, we pride ourselves on presenting the best quality replacement windows, vinyl siding, roofing, bathroom systems, and gutter guards. Clear Choice will ALWAYS install these products in your home as if we were putting them into our own. Should those products ever need service, Clear Choice will ALWAYS be there to take care of any problems. We're confident that the home improvement products we install in your home are the absolute best in the industry.
"This company should not be in business. By far the worst interaction I’ve ever had with a sales person for my entire life. Do not use this company."
John O on September 2024

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

Envy Homes, LLC
Envy Homes, LLC
With over 10 years in the industry, Envy Homes LLC, takes great pride on providing quality service that customers can believe in. We will always see each project through to the customer's satisfaction. Give us a call today for an estimate and to get a General Contractor out to your home or business today!
"They showed up on time each day, were very knowledgeable of the work they performed. Showed up for the quote when we scheduled the first meeting and we were very impressed with the overall experience. The deck they built was spot on and perfect for our needs. They did make some recommendations as to how it would look and work better for us and we went with their decisions and are so happy and impressed. They were very neat about their work and very easy to talk with. I would never use anyone else, and HIGHLY RECOMMEND them for whatever you need. So great to work with."
Phyllis P on July 2023
With over 10 years in the industry, Envy Homes LLC, takes great pride on providing quality service that customers can believe in. We will always see each project through to the customer's satisfaction. Give us a call today for an estimate and to get a General Contractor out to your home or business today!
"They showed up on time each day, were very knowledgeable of the work they performed. Showed up for the quote when we scheduled the first meeting and we were very impressed with the overall experience. The deck they built was spot on and perfect for our needs. They did make some recommendations as to how it would look and work better for us and we went with their decisions and are so happy and impressed. They were very neat about their work and very easy to talk with. I would never use anyone else, and HIGHLY RECOMMEND them for whatever you need. So great to work with."
Phyllis P on July 2023
Newpro Operating, LLC
Newpro Operating, LLC
NEWPRO Operating LLC. has been meeting the needs of New England homeowners for more than 75 years. Family-operated for three generations, NEWPRO offers complete window and door replacement services, featuring double and triple-pane options in a variety of different colors, so there is a window and style for every budget. NEWPRO's best-in-the-industry warranties on product and labor combined with exceptional installation practices and standards set us apart from the rest. Expect a worry-free, hassle-free experience from start through the life of your product with NEWPRO. NEWPRO Home Solutions are the choice for superior performance, beauty and safety.
"Both the primary installer, Matt, and the subsequent installer who finished some details, Dawson, were top notch in their workmanship and customer interaction."
Mark F on December 2023
NEWPRO Operating LLC. has been meeting the needs of New England homeowners for more than 75 years. Family-operated for three generations, NEWPRO offers complete window and door replacement services, featuring double and triple-pane options in a variety of different colors, so there is a window and style for every budget. NEWPRO's best-in-the-industry warranties on product and labor combined with exceptional installation practices and standards set us apart from the rest. Expect a worry-free, hassle-free experience from start through the life of your product with NEWPRO. NEWPRO Home Solutions are the choice for superior performance, beauty and safety.
"Both the primary installer, Matt, and the subsequent installer who finished some details, Dawson, were top notch in their workmanship and customer interaction."
Mark F on December 2023
Chapman Builders LLC
Chapman Builders LLC
Chapman Builders LLC is a responsive, professional, and honest company that specializes in electrical work. Fully licensed and insured in NH. Some of the main installs I do include 200 amp home service upgrades, led lighting installs, and removing old wiring such as knob and tube. Chapman Builders LLC also does other things such as home rot repairs, remodels, flooring, and much more.
"They were great. Communications all the way through, did what they said they'd do. Will work with again!"
Tina S on May 2025
Chapman Builders LLC is a responsive, professional, and honest company that specializes in electrical work. Fully licensed and insured in NH. Some of the main installs I do include 200 amp home service upgrades, led lighting installs, and removing old wiring such as knob and tube. Chapman Builders LLC also does other things such as home rot repairs, remodels, flooring, and much more.
"They were great. Communications all the way through, did what they said they'd do. Will work with again!"
Tina S on May 2025
Jones Building & Remodeling
Jones Building & Remodeling
I have been in the building and remodeling business for over 24 years providing reliable professional services to homeowners with their home improvement projects that include but not limited to tiling custom showers and back splashes, flooring, roofing, kitchen & bathroom remodeling, painting and many home repair & maintenance handyman services. I find enjoyment in being able to assist the homeowner with ideas for their home improvement projects which has allowed me to provide excellent customer service to my customers.
"Had my bathroom remodeled and he did an amazing job, highly recommend."
Jennifer T on September 2024
I have been in the building and remodeling business for over 24 years providing reliable professional services to homeowners with their home improvement projects that include but not limited to tiling custom showers and back splashes, flooring, roofing, kitchen & bathroom remodeling, painting and many home repair & maintenance handyman services. I find enjoyment in being able to assist the homeowner with ideas for their home improvement projects which has allowed me to provide excellent customer service to my customers.
"Had my bathroom remodeled and he did an amazing job, highly recommend."
Jennifer T on September 2024
FAQs for window and door contracting projects in Alton, NH
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 Alton, NH 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.
Are you looking to upgrade an old door in your home? Use this interior door installation cost guide to estimate the project's total cost and learn how to save.
The frame is a crucial part of a door’s looks and proper functioning. Here’s how much you can expect to pay to replace a door frame in your home.
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.
If you’re new to an inclement-weather-prone area, it might be time to learn how to install a storm door. Explore our straightforward eight-step guide here.
Patio doors do more than just open to your outdoor space. Learn how the type of door you choose impacts the lighting, airflow, and atmosphere of your home.
Are you wondering how to fix a door that your dog clawed? Follow this guide to fix dog scratches on wood doors and learn how to repair the damage.
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