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Addition to existing structure builders in Keene

Avatar for CLF Carpentry
CLF Carpentry
99 Bellows Falls Road
5.00(
2
)
Approved Pro
CLF Carpentry
99 Bellows Falls Road
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
9 years of experience

We pride our company on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Feel free to book online with us today!

"Honest, dependable, great craftsmanship."

Kathy B on August 2017

We pride our company on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Feel free to book online with us today!

"Honest, dependable, great craftsmanship."

Kathy B on August 2017


Tim Gagnon Frame to Finish
56 Cornwell Road
4.91(
28
)
Approved Pro
Tim Gagnon Frame to Finish
56 Cornwell Road
4.91(
28
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
17 years of experience

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.

"So glad I hired Tim. He installed chair rail and base molding on my 1st floor. I was reluctant to do it myself. His quote was in-line with what I was expecting to pay. The result speaks for itself with the beautiful job he did. I will be contacting Tim again for a few more jobs that I have."

Steven M on June 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.

"So glad I hired Tim. He installed chair rail and base molding on my 1st floor. I was reluctant to do it myself. His quote was in-line with what I was expecting to pay. The result speaks for itself with the beautiful job he did. I will be contacting Tim again for a few more jobs that I have."

Steven M on June 2025


RP Carpentry, LLC
686 Washington Rd
New on HomeAdvisorNew on Angi
Approved Pro
RP Carpentry, LLC
686 Washington Rd
New on AngiNew on HomeAdvisor
Approved Pro
6 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!


RM Builders
13 Elm Court
4.65(
34
)
Approved Pro
RM Builders
13 Elm Court
4.65(
34
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
21 years of experience

RM Builders, is your locally owned and operated general home improvement contractor. We offer a complete range of services, from painting, to roofing, to custom kitchens and bathrooms. Our name and our credibility are the lifeblood of our business, and we make sure we have exceeded your expectations before we leave your home. Give us a call anytime for a free estimate on your project anytime, and Reg will come out to meet you personally!

"He's very neat and efficient."

Mark W on May 2021

RM Builders, is your locally owned and operated general home improvement contractor. We offer a complete range of services, from painting, to roofing, to custom kitchens and bathrooms. Our name and our credibility are the lifeblood of our business, and we make sure we have exceeded your expectations before we leave your home. Give us a call anytime for a free estimate on your project anytime, and Reg will come out to meet you personally!

"He's very neat and efficient."

Mark W on May 2021


EAM LLC
5.00(
1
)
Approved Pro
EAM LLC
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
514 local quotes requested

We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"Excellent. Ed and his crew are the most responsive and reliable contractors I've worked with in a very long time. They are very up front about what needs to be done and make good suggestions on how to save money. I'll keep hiring them."

Jonathan B on January 2025

We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"Excellent. Ed and his crew are the most responsive and reliable contractors I've worked with in a very long time. They are very up front about what needs to be done and make good suggestions on how to save money. I'll keep hiring them."

Jonathan B on January 2025


Avatar for One Eleven Developers
One Eleven Developers
148 Hill Road
5.00(
8
)
Approved Pro
One Eleven Developers
148 Hill Road
5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
354 local quotes requested

We specialize in envisioning, designing, and building high quality kitchens and baths. Our remodeling services are simple and flexible - we tailor to your stylistic needs whether they be antique, traditional or contemporary. We are dedicated to fulfilling our promise of customer satisfaction, guaranteed.

"I am so happy that I hired One Eleven Developers and couldn't be more pleased with the outcome of the project. These guys are very knowledgable and experienced. They took pride in their work and worked hard to bring my vision to fruition. They took pride in their work and my personal satisfaction with the job really mattered to them. They listened to my ideas and offered their own suggestions based on their years of experience. In addition to their skill they were a delight to work with, they were respectful, friendly, communicative, they worked hard to keep costs down and kept me informed! I've already recommended them to a friend and hired them for more projects! If you end up choosing One Eleven Dev. you won't regret it!"

Anne S on July 2024

We specialize in envisioning, designing, and building high quality kitchens and baths. Our remodeling services are simple and flexible - we tailor to your stylistic needs whether they be antique, traditional or contemporary. We are dedicated to fulfilling our promise of customer satisfaction, guaranteed.

"I am so happy that I hired One Eleven Developers and couldn't be more pleased with the outcome of the project. These guys are very knowledgable and experienced. They took pride in their work and worked hard to bring my vision to fruition. They took pride in their work and my personal satisfaction with the job really mattered to them. They listened to my ideas and offered their own suggestions based on their years of experience. In addition to their skill they were a delight to work with, they were respectful, friendly, communicative, they worked hard to keep costs down and kept me informed! I've already recommended them to a friend and hired them for more projects! If you end up choosing One Eleven Dev. you won't regret it!"

Anne S on July 2024


Avatar for Long Home Products
Long Home Products
30 Centre Rd
New on HomeAdvisorNew on Angi
Approved Pro
Long Home Products
30 Centre Rd
New on AngiNew on HomeAdvisor
Approved Pro
1795 local quotes requested
80 years of experience

With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!


Avatar for DCL Construction
DCL Construction
Based In
5.00(
4
)
Approved Pro
DCL Construction
Based In
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1220 local quotes requested

DCL is dedicated to Providing Reliable Custom Home Renovation Services Since 1999. Serving both residential and commercial markets for over 20 years, we’ve provided skilled and reliable services to general contractors and homeowners in Massachusetts and New Hampshire. We are fully insured, well-equipped and trained to handle projects on various types of structures. Our team of professionals employs high standards of quality and cleanliness to ensure that every project exceeds our client’s expectations. Focused on providing superior results at competitive rates, our team will provide you with an honest assessment of the job and give you an estimate that is in line with market standards. DCL strives to give you more value for your money by pairing our services with fantastic customer service. We are more than happy to promptly address your concerns about any project. We also understand the importance of your time. That’s why we get the job done right the first time! Contact US for a free estimate!!

"Worked quickly and did a great job!"

Raja K on February 2024

DCL is dedicated to Providing Reliable Custom Home Renovation Services Since 1999. Serving both residential and commercial markets for over 20 years, we’ve provided skilled and reliable services to general contractors and homeowners in Massachusetts and New Hampshire. We are fully insured, well-equipped and trained to handle projects on various types of structures. Our team of professionals employs high standards of quality and cleanliness to ensure that every project exceeds our client’s expectations. Focused on providing superior results at competitive rates, our team will provide you with an honest assessment of the job and give you an estimate that is in line with market standards. DCL strives to give you more value for your money by pairing our services with fantastic customer service. We are more than happy to promptly address your concerns about any project. We also understand the importance of your time. That’s why we get the job done right the first time! Contact US for a free estimate!!

"Worked quickly and did a great job!"

Raja K on February 2024


Avatar for Lux Renovations LLC
Lux Renovations LLC
60 Shawmut Rd
4.43(
119
)
Approved Pro
Lux Renovations LLC
60 Shawmut Rd
4.43(
119
)
Approved Pro
Customers say: Quality work
1747 local quotes requested
23 years of experience

Lux Renovations is the exclusive New England provider of the award winning Owens Corning Basement Finishing System. We have multiple full time crews waiting to help you with your project today. From Cape Cod and the Islands to Greenwich Connecticut, Framingham Massachusetts to Hampton New Hampshire and all points in between. We have helped thousands of homeowners transform their unused basements into warm, inviting spaces to be enjoyed by family and friends for decades to come. Finishing your basement not only adds value to your home but greatly increases functionality. Whether you’re looking for a workout room, an office, or an additional space to entertain, we can have your brand new space built and ready for use in just a few weeks, NOT months. Call to schedule an appointment to unlock the full potential of your basement. 800-639-3008

"Everything went very smoothly. The workers were prompt, efficient, and friendly. The quality of the work was excellent."

Selina W on February 2025

Lux Renovations is the exclusive New England provider of the award winning Owens Corning Basement Finishing System. We have multiple full time crews waiting to help you with your project today. From Cape Cod and the Islands to Greenwich Connecticut, Framingham Massachusetts to Hampton New Hampshire and all points in between. We have helped thousands of homeowners transform their unused basements into warm, inviting spaces to be enjoyed by family and friends for decades to come. Finishing your basement not only adds value to your home but greatly increases functionality. Whether you’re looking for a workout room, an office, or an additional space to entertain, we can have your brand new space built and ready for use in just a few weeks, NOT months. Call to schedule an appointment to unlock the full potential of your basement. 800-639-3008

"Everything went very smoothly. The workers were prompt, efficient, and friendly. The quality of the work was excellent."

Selina W on February 2025


Avatar for Tejada's Remodeling Inc
Tejada's Remodeling Inc
5.00(
21
)
Approved Pro
Tejada's Remodeling Inc
5.00(
21
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
8227 local quotes requested

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

"These guys were absolutely amazing. Thank you guys so much for your hard work and helping us out."

Joseph P on May 2025

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

"These guys were absolutely amazing. Thank you guys so much for your hard work and helping us out."

Joseph P on May 2025

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

Building an in-law suite takes between two and seven months. Converting an existing basement, attic, or room can be done in about two months. Constructing a new addition or detached suite often takes four to five months for construction, plus one to two months for permits. The bigger the suite, the longer it will take. 

Yes, you can build an in-law suite in your backyard if you meet local building codes and zoning regulations. An in-law suite often occupies 300 to 800 square feet. Be sure to follow size restrictions, utility separations, and entrance requirements. Hiring a qualified contractor ensures you meet all regulatory requirements because they can pull permits, double-check local code, and gather other skilled pros to work on your suite. 

An in-law suite is a self-contained living space attached to—or detached from—your main home. Expect a bedroom, full bath, and a kitchenette or compact living area. The setup gives relatives privacy, doubles as a potential rental, and can lift your property value. To qualify as a legal dwelling, the suite must meet local building codes and zoning rules.

The Keene, 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.
BRIGHT OPEN ATTIC SPACE
Jun 10, 2025
Jun 10, 2025
An in-law suite is a great solution for people who have family visiting often. Explore how much an in-law suite costs and prep to build yours.
white and gray kitchen with butchers block countertop
Apr 8, 2025
Apr 8, 2025
Looking to enhance the warmth and utility of your kitchen? Explore how much a butcher block countertop costs and start your budget here.
built-in outdoor kitchen with grill and sink
Apr 30, 2025
Apr 30, 2025
Budget for outdoor kitchen costs based on factors such as appliances, materials, permits, labor, amenities, kitchen size, customizations, and more.
BLUE TWO STORY HOME
Apr 30, 2025
Apr 30, 2025
Budget for the cost to add a second story based on factors such as size, foundation work, materials, labor, permits, post-construction cleaning, and more.
small bathroom that has been updated in a remodel
Apr 29, 2025
Apr 29, 2025
Budget for the cost to remodel a small bathroom based on factors such as required fixtures, bathroom size, labor, remodel type, site prep, and more.
guest house in the backyard
Apr 27, 2025
Apr 27, 2025
Need to build a guest house? Here’s how much it costs, what factors affect cost, and what to expect.
Share project details to get started.