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Find Addition to existing structure builders in Alton Bay

Wagner Home Renovation

4.76(
29
)
Approved Pro

Wagner Home Renovation

4.76(
29
)
Approved Pro
Customers say: True professional
20 local quotes requested
20 years of experience

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


Aubrey & Son Home Improvement

5.00(
24
)
Approved Pro

Aubrey & Son Home Improvement

5.00(
24
)
Approved Pro
Super Service Award
Customers say: Quick response
3 years of experience
Free onsite estimate

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.

"Job done to highest standards and timely loved working with the crew "

Mark B on December 2025

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.

"Job done to highest standards and timely loved working with the crew "

Mark B on December 2025


Avatar for C Squared Carpentry

C Squared Carpentry

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

C Squared Carpentry

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
2 years of experience
Free onsite estimate

C Squared Carpentry is a leader in providing our customers with the highest quality service 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!

C Squared Carpentry is a leader in providing our customers with the highest quality service 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!


JT Contracting, LLC

5.00(
4
)
Approved Pro

JT Contracting, LLC

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
20 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's custom 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"A very professional company that goes above and beyond to stay in budget and complete the job in the time frame provided. Excellent work and I was very happy with the finish product and quality of work performed through out the project scope."

Jacqueline G on June 2023

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's custom 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"A very professional company that goes above and beyond to stay in budget and complete the job in the time frame provided. Excellent work and I was very happy with the finish product and quality of work performed through out the project scope."

Jacqueline G on June 2023


Avatar for Horsman Builders

Horsman Builders

5.00(
19
)
Approved Pro

Horsman Builders

5.00(
19
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
30 local quotes requested

We are a full service genral contracting company specializing in all aspects of commercial , residential,industrial construction projects from small to large scale.Most work is performed 'in house" as well as utilizing a tight knit group of sub contractors as needed.

"Company was very good to work with. Great with communication. Needed the job done quite fast and they were able to squeeze me in to get it done for when I needed it."

Jennifer G on November 2023

We are a full service genral contracting company specializing in all aspects of commercial , residential,industrial construction projects from small to large scale.Most work is performed 'in house" as well as utilizing a tight knit group of sub contractors as needed.

"Company was very good to work with. Great with communication. Needed the job done quite fast and they were able to squeeze me in to get it done for when I needed it."

Jennifer G on November 2023


Avatar for New Edge Carpentry LLC

New Edge Carpentry LLC

5.00(
1
)
Approved Pro

New Edge Carpentry LLC

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

New Edge Carpentry is your top choice for any of your home building needs. From home remodels to new construction and addition builds we do it all. We pride ourselves on providing great customer service and quality craftmanship that will last the life of your home. Contact our team of professionals to discuss how we can make your dream home a reality today! (603) 960-1345

"prompt, honest, reliable, reasonable charges, good solid work! also importantly, nice guy!!!! THANKS!!!"

Phil M on October 2021

New Edge Carpentry is your top choice for any of your home building needs. From home remodels to new construction and addition builds we do it all. We pride ourselves on providing great customer service and quality craftmanship that will last the life of your home. Contact our team of professionals to discuss how we can make your dream home a reality today! (603) 960-1345

"prompt, honest, reliable, reasonable charges, good solid work! also importantly, nice guy!!!! THANKS!!!"

Phil M on October 2021


"I was very impressed working with this company. Communication was superb right off the bat. We went over the job in detail, and it was completed perfectly. The company is very professional and pays attention to every detail. The price was good too! They also cleaned the area thoroughly and my property looks exquisite. Hire this company with confidence. Thank you!"

John C on October 2025

Good work guarantee. I love making our customer's happy

"I was very impressed working with this company. Communication was superb right off the bat. We went over the job in detail, and it was completed perfectly. The company is very professional and pays attention to every detail. The price was good too! They also cleaned the area thoroughly and my property looks exquisite. Hire this company with confidence. Thank you!"

John C on October 2025


Avatar for Sky's Carpentry on Lake Winnipesaukee LLC

Sky's Carpentry on Lake Winnipesaukee LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Sky's Carpentry on Lake Winnipesaukee LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
24 years of experience
Free onsite estimate

• Award Winning Service • A+ BBB Rating • With 20+ Years of Experience, Sky’s Carpentry on Lake Winnipesaukee is a Locally Owned & Family Operated Carpentry Company based in the Lakes Region of New Hampshire • Fully Insured • Sky’s Carpentry understands your home needs and wants to make your dreams & ideas come true! • We use the finest materials and will not compromise quality to save money • Sky’s Carpentry on Lake Winnipesaukee is located in beautiful Moultonborough NH and services the entire Lakes Region of New Hampshire • We Service Wolfeboro, down to Alton and all Surrounding Towns around the Big Lake • We offer complete Remodeling Services, building & Home Repairs • Well Established Local Reputation - Check out our website or Visit us on Facebook @ https://www.facebook.com/Skys-Carpentry-on-Lake-Winnipesaukee-llc-209013575961765 • References available upon request • Call (603) 254-4151 to Schedule a FREE Estimate or Appointment

• Award Winning Service • A+ BBB Rating • With 20+ Years of Experience, Sky’s Carpentry on Lake Winnipesaukee is a Locally Owned & Family Operated Carpentry Company based in the Lakes Region of New Hampshire • Fully Insured • Sky’s Carpentry understands your home needs and wants to make your dreams & ideas come true! • We use the finest materials and will not compromise quality to save money • Sky’s Carpentry on Lake Winnipesaukee is located in beautiful Moultonborough NH and services the entire Lakes Region of New Hampshire • We Service Wolfeboro, down to Alton and all Surrounding Towns around the Big Lake • We offer complete Remodeling Services, building & Home Repairs • Well Established Local Reputation - Check out our website or Visit us on Facebook @ https://www.facebook.com/Skys-Carpentry-on-Lake-Winnipesaukee-llc-209013575961765 • References available upon request • Call (603) 254-4151 to Schedule a FREE Estimate or Appointment


Avatar for New England Home Improvements

New England Home Improvements

5.00(
5
)
Approved Pro

New England Home Improvements

5.00(
5
)
Approved Pro
Super Service Award
6 years of experience
Free onsite estimate

New England home improvements in locally owned and operated specializing in general remodeling services. We are reliable, easy to work with, and dedicated to customer satisfaction. pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today!

"Micah was a joy to work with, on time, reasonably priced."

Steven G on March 2025

New England home improvements in locally owned and operated specializing in general remodeling services. We are reliable, easy to work with, and dedicated to customer satisfaction. pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today!

"Micah was a joy to work with, on time, reasonably priced."

Steven G on March 2025


Avatar for Magic Frog Carpentry & Woodworks

Magic Frog Carpentry & Woodworks

4.94(
8
)
Approved Pro

Magic Frog Carpentry & Woodworks

4.94(
8
)
Approved Pro
Super Service Award
Customers say: Quick response
18 local quotes requested
11 years of experience

Meeting somebody, being invited into their house, and listening to their ideas of how they would like to transform their space to better suit their needs excites me. It brings me immense pleasure to be welcomed on an idea based visual journey in creating a customized dwelling in order to improve the quality of function in somebody's daily home life. Bringing ideas to fruition is my specialty. With equal enjoyment in making those popcorn ceilings that you've adored for so long disappear in an array of smoothness, gutting the kitchen where nothing seems to fit anywhere, including the cook, and installing cabinets and lights that transform the "heart of the home" into a space you don't want to step out of, or erecting that garage and mudroom to get your cars out of the weather and the clutter out of your foyer. At Magic Frog Carpentry & Woodworks I live in a solutions based mentality.

"From our very first inquiry phone call, Adam was professional, friendly, and able to clearly explain the work in layman's terms — which we really appreciated. He was punctual for every meeting, extremely respectful of our time, and very communicative throughout the entire process. We had a short window to get the work done, and Adam and his team completed everything quickly, efficiently, and with great attention to detail. The quality of their work and the smoothness of the whole experience truly exceeded our expectations. We're planning more renovations around our home and will absolutely be hiring Adam and his team again. Highly recommend Magic Frog Carpentry & Woodworks."

sarah F on December 2025

Meeting somebody, being invited into their house, and listening to their ideas of how they would like to transform their space to better suit their needs excites me. It brings me immense pleasure to be welcomed on an idea based visual journey in creating a customized dwelling in order to improve the quality of function in somebody's daily home life. Bringing ideas to fruition is my specialty. With equal enjoyment in making those popcorn ceilings that you've adored for so long disappear in an array of smoothness, gutting the kitchen where nothing seems to fit anywhere, including the cook, and installing cabinets and lights that transform the "heart of the home" into a space you don't want to step out of, or erecting that garage and mudroom to get your cars out of the weather and the clutter out of your foyer. At Magic Frog Carpentry & Woodworks I live in a solutions based mentality.

"From our very first inquiry phone call, Adam was professional, friendly, and able to clearly explain the work in layman's terms — which we really appreciated. He was punctual for every meeting, extremely respectful of our time, and very communicative throughout the entire process. We had a short window to get the work done, and Adam and his team completed everything quickly, efficiently, and with great attention to detail. The quality of their work and the smoothness of the whole experience truly exceeded our expectations. We're planning more renovations around our home and will absolutely be hiring Adam and his team again. Highly recommend Magic Frog Carpentry & Woodworks."

sarah F on December 2025

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FAQs for addition to existing structure building service projects in Alton Bay, 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 Alton Bay, 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.