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Find Addition to existing structure builders in Amherst

Chestnut Hill Renovations

5.00(
1
)
Approved Pro

Chestnut Hill Renovations

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
23 years of experience

Chestnut Hill Renovations is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Chestnut Hill Renovations is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

"They are a very professional company who have the clients best interests at heart, instead of coming in and leaving."

Josh S on March 2019

Chestnut Hill Renovations is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Chestnut Hill Renovations is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

"They are a very professional company who have the clients best interests at heart, instead of coming in and leaving."

Josh S on March 2019


Tim Gagnon Frame to Finish

4.92(
31
)
Approved Pro

Tim Gagnon Frame to Finish

4.92(
31
)
Approved Pro
Customers say: Quick response
18 years of experience
Free onsite estimate

Tim Gagnon Frame to Finish, is a client focused company serving the greater Greenfield community. We are committed to excellence in customer service and professional quality craftsmanship in all your construction needs. From start to finish, we specialize in beautiful carpentry and home renovations that will completely change the look of your home using only the highest quality materials. Call us today to learn more about how we can help you upgrade to the home of your dreams.

"I could not be happier with the job Tim and John did installing new windows. It was difficult to find someone to cut a hole in the side of my house as these were not replacements, but a new installation. The windows and trim match the existing windows. Couldn’t ask for a better experience and outcome., I can’t recommend Tim enough."

Ron B on December 2025

Tim Gagnon Frame to Finish, is a client focused company serving the greater Greenfield community. We are committed to excellence in customer service and professional quality craftsmanship in all your construction needs. From start to finish, we specialize in beautiful carpentry and home renovations that will completely change the look of your home using only the highest quality materials. Call us today to learn more about how we can help you upgrade to the home of your dreams.

"I could not be happier with the job Tim and John did installing new windows. It was difficult to find someone to cut a hole in the side of my house as these were not replacements, but a new installation. The windows and trim match the existing windows. Couldn’t ask for a better experience and outcome., I can’t recommend Tim enough."

Ron B on December 2025


Avatar for Loyd's Home Improvement

Loyd's Home Improvement

4.61(
23
)
Approved Pro

Loyd's Home Improvement

4.61(
23
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
12 local quotes requested

Loyd's Home Improvement is ready to provide everything and anything your home needs to look and feel new again at affordable prices. With over 25 years of experience, Loyd's Home Improvement has designed and build several Handicapped decks and ramps. Call today for details! Additional DBA - Harold Loyd.

"Harold & his crew, Charlie & Mike were awesome. Came to work on time. They listened to my wants & needs and came up with a plan that worked. Communicated with us through out the process. Their attention to detail was incredible. They went above & beyond their job description. I would highly recommend them on any renovations, they are very talented skilled laborers. It was a pleasure doing business with this company."

John R on December 2024

Loyd's Home Improvement is ready to provide everything and anything your home needs to look and feel new again at affordable prices. With over 25 years of experience, Loyd's Home Improvement has designed and build several Handicapped decks and ramps. Call today for details! Additional DBA - Harold Loyd.

"Harold & his crew, Charlie & Mike were awesome. Came to work on time. They listened to my wants & needs and came up with a plan that worked. Communicated with us through out the process. Their attention to detail was incredible. They went above & beyond their job description. I would highly recommend them on any renovations, they are very talented skilled laborers. It was a pleasure doing business with this company."

John R on December 2024


Avatar for Maize Restoration & Remodeling

Maize Restoration & Remodeling

4.21(
19
)
Approved Pro

Maize Restoration & Remodeling

4.21(
19
)
Approved Pro
Customers say: Super punctual
15 local quotes requested
19 years of experience

Maize Restoration & Remodeling is an organization providing various services from remodeling bathrooms, kitchens, and basements, to building decks and replacing windows/doors. The organization consist of skilled and ambitious craftsmen dedicated to providing unparalleled customer service and quality workmanship. The organization commits to maintaining professionalism and integrity in every facet of our work to ensure exceptional results and an exceptional experience.

"The initial build went reasonably well. We did find problems which they did come back and fix. I noticed a railing support that was cracked. I was told that I must of done it, that was that. The plugs that cover the screw holes in the stairs are falling out. I looked for some at Home Depot, but couldn't find the right color. I still had Chase's cell #, so I texted him and asked if he could send me some plugs, and I would do it myself. No response. Tried again the next day, still no response. I'm not surprised. Aging the build was decent, price was higher than most. Now that nearly 2 years have gone by, and customer service should be anticipated, nothing. Never again."

Lou F on July 2025

Maize Restoration & Remodeling is an organization providing various services from remodeling bathrooms, kitchens, and basements, to building decks and replacing windows/doors. The organization consist of skilled and ambitious craftsmen dedicated to providing unparalleled customer service and quality workmanship. The organization commits to maintaining professionalism and integrity in every facet of our work to ensure exceptional results and an exceptional experience.

"The initial build went reasonably well. We did find problems which they did come back and fix. I noticed a railing support that was cracked. I was told that I must of done it, that was that. The plugs that cover the screw holes in the stairs are falling out. I looked for some at Home Depot, but couldn't find the right color. I still had Chase's cell #, so I texted him and asked if he could send me some plugs, and I would do it myself. No response. Tried again the next day, still no response. I'm not surprised. Aging the build was decent, price was higher than most. Now that nearly 2 years have gone by, and customer service should be anticipated, nothing. Never again."

Lou F on July 2025


Avatar for St. James Construction, LLC

St. James Construction, LLC

5.00(
5
)
Approved Pro

St. James Construction, LLC

5.00(
5
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 local quotes requested

At our company, your satisfaction is our top priority. We are committed to completing every job to the highest standards, ensuring exceptional quality and service. Discover our range of services and reach out today to book your free estimate. Let us show you the difference our dedication can make!

"Corey and his team are great to work with. He is a prompt communicator and is very organized. He also has a great attention to detail and ensures the project is perfect before claiming he is done. He is easy to work with and was able to make our ideas a reality. We have used him for several projects already and have him lined up for another. I highly recommend St. James Construction."

Chris T on January 2025

At our company, your satisfaction is our top priority. We are committed to completing every job to the highest standards, ensuring exceptional quality and service. Discover our range of services and reach out today to book your free estimate. Let us show you the difference our dedication can make!

"Corey and his team are great to work with. He is a prompt communicator and is very organized. He also has a great attention to detail and ensures the project is perfect before claiming he is done. He is easy to work with and was able to make our ideas a reality. We have used him for several projects already and have him lined up for another. I highly recommend St. James Construction."

Chris T on January 2025


Avatar for 603 Contracting LLC

603 Contracting LLC

5.00(
17
)
Approved Pro

603 Contracting LLC

5.00(
17
)
Approved Pro
7 years of experience
Free onsite estimate

603 Contracting is a trusted general contractor based in Derry, NH, serving homeowners and businesses throughout southern New Hampshire. We specialize in residential remodeling, additions, new home construction, and commercial tenant improvements, delivering high-quality craftsmanship with a professional and reliable approach. Our team is committed to clear communication, structured project management, and maintaining a clean, organized work environment. From kitchen and bathroom renovations to full home builds and commercial fit-ups, we handle projects of all sizes with attention to detail and a focus on customer satisfaction. Contact us today to discuss your construction needs!

"Mike was very professional, communicated clearly, and finished the job in a timely manner. Great experience overall."

Kyle W on January 2026

603 Contracting is a trusted general contractor based in Derry, NH, serving homeowners and businesses throughout southern New Hampshire. We specialize in residential remodeling, additions, new home construction, and commercial tenant improvements, delivering high-quality craftsmanship with a professional and reliable approach. Our team is committed to clear communication, structured project management, and maintaining a clean, organized work environment. From kitchen and bathroom renovations to full home builds and commercial fit-ups, we handle projects of all sizes with attention to detail and a focus on customer satisfaction. Contact us today to discuss your construction needs!

"Mike was very professional, communicated clearly, and finished the job in a timely manner. Great experience overall."

Kyle W on January 2026


Avatar for DiOrio Builders & Designers Inc

DiOrio Builders & Designers Inc

4.63(
119
)
Approved Pro

DiOrio Builders & Designers Inc

4.63(
119
)
Approved Pro
Super Service Award
Customers say: Quality work
13 local quotes requested
60 years of experience

DiOrio Builders and Designers Inc. is a fully licensed and insured company committed to providing homeowners with the highest level of craftsmanship. Built on old fashioned values we are experienced specialists that will complete your project to exact specifications in a timely manner. Quality work is our priority while paying special attention to detail. No job is too big or too small.

"DiOrio did good work and were always professional and communicative."

Andrew L on December 2025

DiOrio Builders and Designers Inc. is a fully licensed and insured company committed to providing homeowners with the highest level of craftsmanship. Built on old fashioned values we are experienced specialists that will complete your project to exact specifications in a timely manner. Quality work is our priority while paying special attention to detail. No job is too big or too small.

"DiOrio did good work and were always professional and communicative."

Andrew L on December 2025


"Pedro and his team were excellent. They were professional and timely, hard-working and meticulous, and trustworthy. Best of all (at least for me), is that Pedro is VERY responsive and his team is assigned to get your job done and done correctly. They show up on time every day, and were willing to work late into the evening to hit the project milestones. Pedro was 100% clear about the costs, and he made sure I fully understood the areas where the costs were not known or where the costs could possibly change. For example, he said, "If you open up this wall, I'm not sure what we are going to find." I told him to proceed and his team opened up that wall and found that the previous contractor had installed literally zero insulation. Pedro met with me, reviewed what his team had found, went over all of our options, gave me his recommendation, and only proceeded when I completely approved the additional work that would be done and the additional cost entailed. Pedro is a true partner and his team does great work. I cannot recommend them enough. My wife and I have already booked them for another job renovating a first floor porch and creating a roof over the open-air second floor porch."

Timothy M on October 2024

Carpenters, Plumbers, Electrician, Plasters and All license professional and Insured.. 100% Job guaranteed.

"Pedro and his team were excellent. They were professional and timely, hard-working and meticulous, and trustworthy. Best of all (at least for me), is that Pedro is VERY responsive and his team is assigned to get your job done and done correctly. They show up on time every day, and were willing to work late into the evening to hit the project milestones. Pedro was 100% clear about the costs, and he made sure I fully understood the areas where the costs were not known or where the costs could possibly change. For example, he said, "If you open up this wall, I'm not sure what we are going to find." I told him to proceed and his team opened up that wall and found that the previous contractor had installed literally zero insulation. Pedro met with me, reviewed what his team had found, went over all of our options, gave me his recommendation, and only proceeded when I completely approved the additional work that would be done and the additional cost entailed. Pedro is a true partner and his team does great work. I cannot recommend them enough. My wife and I have already booked them for another job renovating a first floor porch and creating a roof over the open-air second floor porch."

Timothy M on October 2024


Avatar for R&A Property Solutions, LLC

R&A Property Solutions, LLC

5.00(
6
)
Approved Pro

R&A Property Solutions, LLC

5.00(
6
)
Approved Pro
2 years of experience
Free onsite estimate

R&A Property Solutions LLC 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.

"Superior craftsmanship, reliable, on time, responsive and good communication. Would highly recommend!"

Hester R on November 2025

R&A Property Solutions LLC 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.

"Superior craftsmanship, reliable, on time, responsive and good communication. Would highly recommend!"

Hester R on November 2025


Jim Yaratz III

4.10(
22
)
Approved Pro

Jim Yaratz III

4.10(
22
)
Approved Pro
Customers say: Quick response
38 years of experience
Free onsite estimate

Jim Yaratz Custom Carpentry has been in business since 1988, but their tradition of putting the customer first goes back generations. Owner Jim Yaratz has been working in this industry, side by side with his Dad, since he was old enough to hold a hammer. He learned by example to abide by the virtues of honesty, hard work, and the value of old-fashioned craftsmanship. We strive for quality, and we make sure the customer comes first. You can count on attention to every detail of your home. Jim works with you every step of the way, and willingly answers all questions. He personally works on every project and focuses on just one job at a time so you get his full attention. If you care about quality, durability, and a fair price, look to Jim Yaratz for all your remodeling and home improvement needs. We look forward to working with you! Sincerely--Jim Yaratz

"Jim and crew are reliable and knowledgeable. I agree with all that Dana C in Kensington shared. We hired Jim to close in a carport for an addition by seeing the work he was completing for Dana. I then had him remodel an old garage that needed a face lift. We now have Jim building a ranch home for us from the ground up. It is going just as well. If only the prices due to the economy were not so disappointing. Materials are through the roof as a result. Here hoping for some REAL change in 2025 !!!!"

Eileen P on October 2024

Jim Yaratz Custom Carpentry has been in business since 1988, but their tradition of putting the customer first goes back generations. Owner Jim Yaratz has been working in this industry, side by side with his Dad, since he was old enough to hold a hammer. He learned by example to abide by the virtues of honesty, hard work, and the value of old-fashioned craftsmanship. We strive for quality, and we make sure the customer comes first. You can count on attention to every detail of your home. Jim works with you every step of the way, and willingly answers all questions. He personally works on every project and focuses on just one job at a time so you get his full attention. If you care about quality, durability, and a fair price, look to Jim Yaratz for all your remodeling and home improvement needs. We look forward to working with you! Sincerely--Jim Yaratz

"Jim and crew are reliable and knowledgeable. I agree with all that Dana C in Kensington shared. We hired Jim to close in a carport for an addition by seeing the work he was completing for Dana. I then had him remodel an old garage that needed a face lift. We now have Jim building a ranch home for us from the ground up. It is going just as well. If only the prices due to the economy were not so disappointing. Materials are through the roof as a result. Here hoping for some REAL change in 2025 !!!!"

Eileen P on October 2024

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FAQs for addition to existing structure building service projects in Amherst, NH

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Amherst, NH homeowners’ guide to addition to existing structure building services

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