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*The Angi rating for Window And Door Contracting companies in Alton, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
*The HomeAdvisor rating for Window And Door Contracting companies in Alton, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
Last update on November 26, 2025
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.
James Donohue
James Donohue
We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
Wolf Construction
Wolf Construction
Our Company is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Alen was very nice person and his work was excellent."
Chris T on October 2024
Our Company is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Alen was very nice person and his work was excellent."
Chris T on October 2024
Stone Mountain Contracting
Stone Mountain Contracting
Stone Mountain Contracting, take great pride in our experience, expertise, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.
"I hired Seth of Stone Mountain in Summer of 2023 to redo my entry way stairs. He was skilled, timely and helped workshop some ideas. He brought his own tools and purchased all the supplies. He built my entryway stairs quickly, removed the old stairs and built them in a way that will keep them durable. 10/10 would hire again."
Conner T on March 2024
Stone Mountain Contracting, take great pride in our experience, expertise, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.
"I hired Seth of Stone Mountain in Summer of 2023 to redo my entry way stairs. He was skilled, timely and helped workshop some ideas. He brought his own tools and purchased all the supplies. He built my entryway stairs quickly, removed the old stairs and built them in a way that will keep them durable. 10/10 would hire again."
Conner T on March 2024

Renewal by Andersen
Renewal by Andersen
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
"Did not start yet will be in November "
Gisele S on October 2025
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
"Did not start yet will be in November "
Gisele S on October 2025

NH Projects LLC
NH Projects LLC
NH Projects LLC is the place to call for all your basement and bathroom remodeling needs. Our small team brings well over 35 years of construction experience to ensure your project goes smoothly and compliments your space. We pride ourselves on honestly, hard work, and innovate skills to aid our customers in their home improvement endeavors. Give us a call today!
"Because we were going away for an extended time, and insulation work by others had to be completed first, we had to schedule drywall workday NH Projects under a rather tight time frame. Despite uncooperative weather (lots of rain slowing the drying time), they managed to get everything done as needed, working around other scheduled work they had. They were prompt, professional, and a pleasure to interact with, in addition to doing excellent work."
John R on November 2023
NH Projects LLC is the place to call for all your basement and bathroom remodeling needs. Our small team brings well over 35 years of construction experience to ensure your project goes smoothly and compliments your space. We pride ourselves on honestly, hard work, and innovate skills to aid our customers in their home improvement endeavors. Give us a call today!
"Because we were going away for an extended time, and insulation work by others had to be completed first, we had to schedule drywall workday NH Projects under a rather tight time frame. Despite uncooperative weather (lots of rain slowing the drying time), they managed to get everything done as needed, working around other scheduled work they had. They were prompt, professional, and a pleasure to interact with, in addition to doing excellent work."
John R on November 2023

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
Main Carpentry
Main Carpentry
Call Main Carpentry for friendly service, quality carpentry, construction and home improvements. 603-630-1129.
"Quick response, friendly, Terrific to work with"
MarkM K on July 2018
Call Main Carpentry for friendly service, quality carpentry, construction and home improvements. 603-630-1129.
"Quick response, friendly, Terrific to work with"
MarkM K on July 2018

Capital Construction Contracting North
Capital Construction Contracting North
Capital Construction Contracting Inc. was founded in 2005 as a full service home remodeling company. We provide complete interior and exterior home improvement services specializing in James Hardie siding, including roofing, windows, doors, custom decks and interior remodels. We pride ourselves on fantastic customer service and top notch craftsmanship. We hold numerous certifications in the industry, and we are proud to work with the best products from leading manufacturers. No matter what home improvement needs you have, Capital Construction Contracting Inc. is here to provide you with quality solutions. Our mission is simple : to improve the lives of our customers by providing the highest quality building materials installed by highly skilled, professionally trained crafts persons with the highest level of customer service. Feel free to visit our showroom: 3 Norwood Street, Dorchester MA We value your business!
"Excellent work performance. Installers very professional. "
Marlene B on November 2025
Capital Construction Contracting Inc. was founded in 2005 as a full service home remodeling company. We provide complete interior and exterior home improvement services specializing in James Hardie siding, including roofing, windows, doors, custom decks and interior remodels. We pride ourselves on fantastic customer service and top notch craftsmanship. We hold numerous certifications in the industry, and we are proud to work with the best products from leading manufacturers. No matter what home improvement needs you have, Capital Construction Contracting Inc. is here to provide you with quality solutions. Our mission is simple : to improve the lives of our customers by providing the highest quality building materials installed by highly skilled, professionally trained crafts persons with the highest level of customer service. Feel free to visit our showroom: 3 Norwood Street, Dorchester MA We value your business!
"Excellent work performance. Installers very professional. "
Marlene B on November 2025

Bayside Property Support, LLC
Bayside Property Support, LLC
Bayside Property Support is dedicated to your vacation, investment or primary property. We offer full-service support that meets the needs of homeowners in the Lakes Region of New Hampshire> Are you selling your home and need items taken care of so your property sells for the maximum price? Bayside Property Support can help! Using your second home on the lake and need maintenance or repairs? We can help! Do you live in your home year round and just need someone to change the out of reach light bulb, or do some painting? We can help! Do you need your cottage winterized, do you need someone to oversee a construction project? Bayside Property Support can handle any issue that comes up and will treat your home with respect as if it was our own! Bayside Property Support keeps you informed and up to date on our progress at your home. We are available for emergency calls and an online service request makes it easy to order the help you need or get a free estimate!
"Rob Wichland is a great leader at Bayside. I rely on him for various services each year, and he always comes through with excellent results. He is also a consistently terrific communicator on project details when necessary. Customer Service is always top notch. Robâ s staff are very professional and adept at completing many different property management services. Iâ m a very satisfied customer who has used Baysideâ s services over the past many years, and I strongly recommend them for their consistent quality work, range of services offered, easy process, timeliness, and reasonable pricing!"
Lorrie L on November 2024
Bayside Property Support is dedicated to your vacation, investment or primary property. We offer full-service support that meets the needs of homeowners in the Lakes Region of New Hampshire> Are you selling your home and need items taken care of so your property sells for the maximum price? Bayside Property Support can help! Using your second home on the lake and need maintenance or repairs? We can help! Do you live in your home year round and just need someone to change the out of reach light bulb, or do some painting? We can help! Do you need your cottage winterized, do you need someone to oversee a construction project? Bayside Property Support can handle any issue that comes up and will treat your home with respect as if it was our own! Bayside Property Support keeps you informed and up to date on our progress at your home. We are available for emergency calls and an online service request makes it easy to order the help you need or get a free estimate!
"Rob Wichland is a great leader at Bayside. I rely on him for various services each year, and he always comes through with excellent results. He is also a consistently terrific communicator on project details when necessary. Customer Service is always top notch. Robâ s staff are very professional and adept at completing many different property management services. Iâ m a very satisfied customer who has used Baysideâ s services over the past many years, and I strongly recommend them for their consistent quality work, range of services offered, easy process, timeliness, and reasonable pricing!"
Lorrie L on November 2024
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.

Screen door installation costs depend on size, type of frame material, and the number of doors. Here’s everything you need to know.

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.

If you’ve ever wondered, “What is a fire door, and do I need one?” check out our all-encompassing guide on fire doors and their pros and cons.

French doors are an elegant way to let light in and provide access to the side or rear of your home. Learn what French doors are and why they’re so popular.

Love the idea of a retractable screen door for your home? Get to know the pros and cons. Learn about three retractable screen storm door problems and how to fix them.
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