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Find Addition to existing structure builders in Concord

Avatar for Advance Guard Builders LLC

Advance Guard Builders LLC

68 Harrison Ave. STE. 605
5.00(
6
)
Approved Pro

Advance Guard Builders LLC

68 Harrison Ave. STE. 605
5.00(
6
)
Approved Pro
Customers say: Quick response
27 local quotes requested
2 years of experience

Advance Guard Builders LLC 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. Advance Guard Builders LLC 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!

"I recently had Advance Guard build a new deck and replace my old wrap-around porch, and the results are outstanding. From the start, Dave was professional, knowledgeable, and passionate about his work. He listened to my ideas, offered valuable suggestions, and kept me informed throughout the process. The craftsmanship was top-notch, with great attention to detail. The new deck is spacious and beautifully designed, using high-quality materials. The porch replacement blends seamlessly with the new deck. The job site was always clean, and the project was completed on time and within budget. Dave was approachable, communicative, and dedicated to customer satisfaction, making the entire experience enjoyable. I highly recommend Advance Guard for any home improvement projects. The new deck and porch have transformed my outdoor space into a stunning area I'm proud to show off."

Cam G on June 2024

Advance Guard Builders LLC 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. Advance Guard Builders LLC 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!

"I recently had Advance Guard build a new deck and replace my old wrap-around porch, and the results are outstanding. From the start, Dave was professional, knowledgeable, and passionate about his work. He listened to my ideas, offered valuable suggestions, and kept me informed throughout the process. The craftsmanship was top-notch, with great attention to detail. The new deck is spacious and beautifully designed, using high-quality materials. The porch replacement blends seamlessly with the new deck. The job site was always clean, and the project was completed on time and within budget. Dave was approachable, communicative, and dedicated to customer satisfaction, making the entire experience enjoyable. I highly recommend Advance Guard for any home improvement projects. The new deck and porch have transformed my outdoor space into a stunning area I'm proud to show off."

Cam G on June 2024


Avatar for Level Enterprises, LLC

Level Enterprises, LLC

152 Liberty Square Rd
4.95(
20
)
Approved Pro

Level Enterprises, LLC

152 Liberty Square Rd
4.95(
20
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
2 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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. Over 20 years of experience.

"We couldn't be happier with Dave's overhaul of our fireplace. His attention to detail, and commitment to excellence. We feel so lucky to have found him after another contractor flaked out on us. He came to the rescue & did whatever it took to get the job done on time and on budget. He is highly skilled and capable. Several times during the job he suggested things that would enhance the finished product. In doing so he created more work for himself. These upgrades probably added a full day of additional work. He didn't change the cost for the job, he just wants his customers to be happy. His attention to detail and cleanliness blew our minds. He spent a full day getting the room taped off to prevent dust from spreading throughout the house. A full day!?!? And it paid off when the work was done...we're not even hiring a cleaner. More than anything Dave's got a good heart, my wife and I genuinely enjoyed meeting and working with him. (Note: no AI was used in writing this review!)"

Matt S on December 2024

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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. Over 20 years of experience.

"We couldn't be happier with Dave's overhaul of our fireplace. His attention to detail, and commitment to excellence. We feel so lucky to have found him after another contractor flaked out on us. He came to the rescue & did whatever it took to get the job done on time and on budget. He is highly skilled and capable. Several times during the job he suggested things that would enhance the finished product. In doing so he created more work for himself. These upgrades probably added a full day of additional work. He didn't change the cost for the job, he just wants his customers to be happy. His attention to detail and cleanliness blew our minds. He spent a full day getting the room taped off to prevent dust from spreading throughout the house. A full day!?!? And it paid off when the work was done...we're not even hiring a cleaner. More than anything Dave's got a good heart, my wife and I genuinely enjoyed meeting and working with him. (Note: no AI was used in writing this review!)"

Matt S on December 2024


Avatar for M Builders, LLC

M Builders, LLC

32 School St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

M Builders, LLC

32 School St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
4 years of experience
Free onsite estimate

Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed. With 25+ years of experience in construction, Luis Matute and Rony Mendez, longtime friends, decided to put together their skills and found M Builders LLC. Luis holds a General Contractor license, Home improvement license, alongside with other licenses. He has an electrical company and has been supervising construction sites for years now. Rony Mendez, also has an Electrical License with multiple other licenses and has a Security Systems company. He has been supervising construction sites alongside with Luis for years. They have been working together for so long that they do not only consider each other business partners but also family. M Builders is coming to simplify construction for their clients in the State of Massachusetts.

Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed. With 25+ years of experience in construction, Luis Matute and Rony Mendez, longtime friends, decided to put together their skills and found M Builders LLC. Luis holds a General Contractor license, Home improvement license, alongside with other licenses. He has an electrical company and has been supervising construction sites for years now. Rony Mendez, also has an Electrical License with multiple other licenses and has a Security Systems company. He has been supervising construction sites alongside with Luis for years. They have been working together for so long that they do not only consider each other business partners but also family. M Builders is coming to simplify construction for their clients in the State of Massachusetts.


Legacy Building Group, LLC

13 George St Apt 3
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Legacy Building Group, LLC

13 George St Apt 3
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
1 years of experience
Free onsite estimate

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!


J.J Devine Building & Remodeling

94 Adams Street
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

J.J Devine Building & Remodeling

94 Adams Street
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
25 years of experience
Free onsite estimate

*Licensed and Insured* We take great pride our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. 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.

*Licensed and Insured* We take great pride our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. 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.


Avatar for All Matters General Contractor Inc.

All Matters General Contractor Inc.

92 High Street, Unit DH10
4.89(
18
)
Approved Pro

All Matters General Contractor Inc.

92 High Street, Unit DH10
4.89(
18
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
23 years of experience

All Matters General Contractor Inc., provides various home improvement services including roofing and siding for your home or business. We have many years of experience in the business. We pride our company on reliability, great communication, integrity and quality work. All Matters General Contractor Inc., is the expert 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.

"They put a new roof on our house. They were efficient and did an excellent job cleaning up after completion. My only issue was the amount of shingles delivered to our house, even after the normal amount considered as a waste factor on the job was over 25% more than needed. They used 71 bundles to complete the job but had 94 bundles delivered. Then, they stated that we were never charged for 94 bundles. This made no sense to me. So, although they did a great job, I would recommend that any future customer get a detailed quote to include the amount of materials needed. Shame on me for not getting that when we got the quote. That was the only issue and the fact that the explanation received from them made no sense and was not very polite to me as the customer."

Jim H on June 2022

All Matters General Contractor Inc., provides various home improvement services including roofing and siding for your home or business. We have many years of experience in the business. We pride our company on reliability, great communication, integrity and quality work. All Matters General Contractor Inc., is the expert 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.

"They put a new roof on our house. They were efficient and did an excellent job cleaning up after completion. My only issue was the amount of shingles delivered to our house, even after the normal amount considered as a waste factor on the job was over 25% more than needed. They used 71 bundles to complete the job but had 94 bundles delivered. Then, they stated that we were never charged for 94 bundles. This made no sense to me. So, although they did a great job, I would recommend that any future customer get a detailed quote to include the amount of materials needed. Shame on me for not getting that when we got the quote. That was the only issue and the fact that the explanation received from them made no sense and was not very polite to me as the customer."

Jim H on June 2022


KDS Development

31 Linda Avenue
4.94(
26
)
Approved Pro

KDS Development

31 Linda Avenue
4.94(
26
)
Approved Pro
Customers say: Quick response
31 years of experience
Free onsite estimate

Over 20 years of experience throughout Massachusetts, including Middlesex County and surrounding suburbs. Our services include: New construction, general contracting, additions kitchens, bathrooms, basements, built-in cabinetry, raised ceilings and cathedral ceilings, second story additions, entertainment center build and design, surround-sound, windows replacement old and new, roofing, dormers, all general carpentry. We are fully licensed and insured, plenty of references, free estimates.

"Small but significant weatherproofing job handled with care and knowledge equivalent to building the Brooklyn Bridge. Top notch customer care and concern."

Glenn M on February 2025

Over 20 years of experience throughout Massachusetts, including Middlesex County and surrounding suburbs. Our services include: New construction, general contracting, additions kitchens, bathrooms, basements, built-in cabinetry, raised ceilings and cathedral ceilings, second story additions, entertainment center build and design, surround-sound, windows replacement old and new, roofing, dormers, all general carpentry. We are fully licensed and insured, plenty of references, free estimates.

"Small but significant weatherproofing job handled with care and knowledge equivalent to building the Brooklyn Bridge. Top notch customer care and concern."

Glenn M on February 2025


Avatar for Makeover and Finishes Group Inc

Makeover and Finishes Group Inc

170 Worcester St Suite 201
4.00(
1
)
Approved Pro

Makeover and Finishes Group Inc

170 Worcester St Suite 201
4.00(
1
)
Approved Pro
11 local quotes requested
8 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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.


[RE]Architecting, LLC

30 Main St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

[RE]Architecting, LLC

30 Main St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
9 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the 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.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the 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.


Avatar for WR Builders, Inc

WR Builders, Inc

397 Elliot
5.00(
88
)
Approved Pro

WR Builders, Inc

397 Elliot
5.00(
88
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
74 local quotes requested

WR Builders, Inc. is a full-service design-build firm located in Newton, Massachusetts. We are fully licensed. Our services include new home construction, home renovations, additions, kitchen remodeling, bath remodeling, interior design, and gut renovations for homes, condominiums, and investment property. We focus on capturing the unique style and personality of every client. Whether your style is traditional, transitional or contemporary, we deliver the highest quality design-build services in New England

"I hired them to renovate my home. They did a great job"

Hector I on September 2025

WR Builders, Inc. is a full-service design-build firm located in Newton, Massachusetts. We are fully licensed. Our services include new home construction, home renovations, additions, kitchen remodeling, bath remodeling, interior design, and gut renovations for homes, condominiums, and investment property. We focus on capturing the unique style and personality of every client. Whether your style is traditional, transitional or contemporary, we deliver the highest quality design-build services in New England

"I hired them to renovate my home. They did a great job"

Hector I on September 2025

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FAQs for addition to existing structure building service projects in Concord, MA

Yes, hidden rooms are legal, as long as they meet all local building regulations. If you sell your house, most states require homeowners to disclose full houseplans, which would include any hidden rooms.

If your secret room is a safe room, it should contain a means of communication aside from a cell phone, such as a shortwave radio. You should also have plenty of drinking water, a portable generator, emergency food supplies, blankets, pillows, flashlights, batteries and a first aid kit.

Any time you update your home’s square footage, you increase its value, but a secret room is a niche feature that doesn't rank high on every buyer’s list of must-haves. Investing your money in remodeling more common living areas like bedrooms, bathrooms, or kitchens will have a higher ROI than adding a secret room. Many secret rooms can act as entertainment spaces (think a game room or wine cellar) or quiet spaces (a library or study), so when building your secret room you may want to consider its versatility for when you’re ready to sell.

The Concord, MA 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.

  • A renovated kitchen with a waterfall island

    HomeAdvisor’s DIY Kitchen Remodel Cost Guide looks at the cost of buying supplies and doing the work yourself. Find the key cost factors and how to cut expenses.

  • Secret room within bookcase

    HomeAdvisor's expert guide walks you through the cost to build a secret room, whether you're creating a safe room for security or a fun space to fulfil your childhood fantasies. Use this guide to help plan your secret room project and explore room, concea

  • outdoor patio bar

    Explore the cost to build a bar in your home and learn how materials, wet vs. dry bars, and labor costs influence the total price of your project.