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Find Addition to existing structure builders in Northborough

Clement Construction Inc is the reliable choice for your remodeling needs. We specialize in high end basement remodels. We pride ourselves on the quality of our work and customer relations. So give us a call!


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!


Avatar for Mason Sky Enterprises, LLC

Mason Sky Enterprises, LLC

134 Worcester-Providence Tpke
5.00(
18
)
Approved Pro

Mason Sky Enterprises, LLC

134 Worcester-Providence Tpke
5.00(
18
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 local quotes requested

Mason Sky is a one shop stop for all of your contracting needs. With a vast pool of vendors and trade partners we have access to almost all of your remodeling and building needs. Billing procedures usually take 1 of 2 routes. Either an hourly model or a construction quote with a total job price. We also offer financing through a local bank.

"I recently had a home built for me in Kennebunk,Maine by Jason and the crew of Mason Sky Enterprises and I have nothing but praise for them, not only did they construct my home to the highest standards in an incredibly timely manner but they were also kind and considerate and endlessly patient when it came to my plethora of never ending questions which I am very grateful for. I highly recommend them for any job whether that be large or small. With much gratitude! SSgt.K Campbell USAF (Ret.)"

Kevin C on December 2022

Mason Sky is a one shop stop for all of your contracting needs. With a vast pool of vendors and trade partners we have access to almost all of your remodeling and building needs. Billing procedures usually take 1 of 2 routes. Either an hourly model or a construction quote with a total job price. We also offer financing through a local bank.

"I recently had a home built for me in Kennebunk,Maine by Jason and the crew of Mason Sky Enterprises and I have nothing but praise for them, not only did they construct my home to the highest standards in an incredibly timely manner but they were also kind and considerate and endlessly patient when it came to my plethora of never ending questions which I am very grateful for. I highly recommend them for any job whether that be large or small. With much gratitude! SSgt.K Campbell USAF (Ret.)"

Kevin C on December 2022


B LAGRASSA CONSTRUCTION LLC

240 Old Main St
4.44(
17
)
Approved Pro

B LAGRASSA CONSTRUCTION LLC

240 Old Main St
4.44(
17
)
Approved Pro
Customers say: Quick response
4 years of experience
Free onsite estimate

B Lagrassa Construction is your one stop shop for all remodeling, decks and home improvement needs. We pride ourselves on quality work, fair pricing and customer satisfaction on every project...we will treat your home like our own. Give us a call today to schedule your free home estimate and ask all the questions you need answers for regarding your dream project. We are licensed and insured for your protection and look forward to adding you to our long list of happy customers!

"We hired Brennan and his company when he first started his company, years ago. We had to structurally change the living room and dining room prior to renovating the kitchen. By the end of the project we had an entire open concept first floor, and brand new kitchen. Between the workmanship, communication, dedication to show up on time, when they said they would, I would highly reccomend B LaGrassa Construction. "

Daniel C on September 2025

B Lagrassa Construction is your one stop shop for all remodeling, decks and home improvement needs. We pride ourselves on quality work, fair pricing and customer satisfaction on every project...we will treat your home like our own. Give us a call today to schedule your free home estimate and ask all the questions you need answers for regarding your dream project. We are licensed and insured for your protection and look forward to adding you to our long list of happy customers!

"We hired Brennan and his company when he first started his company, years ago. We had to structurally change the living room and dining room prior to renovating the kitchen. By the end of the project we had an entire open concept first floor, and brand new kitchen. Between the workmanship, communication, dedication to show up on time, when they said they would, I would highly reccomend B LaGrassa Construction. "

Daniel C on September 2025


"We added a great room, entryway, deck and second floor room to a ranch. Kip has a great design sensibility and we worked together without an architect to come up with a plan. We've been extraordinarily happy with the result; we love the house. The older section works seamlessly with the newer section. Kip pays attention to details. After the work was done, Modern Habitat has been responsive to whatever issues that arose. We are truly appreciative!"

Lisa B on November 2023

Modern Habitat is a custom home builder and renovator offering design, general contracting and project management services .

"We added a great room, entryway, deck and second floor room to a ranch. Kip has a great design sensibility and we worked together without an architect to come up with a plan. We've been extraordinarily happy with the result; we love the house. The older section works seamlessly with the newer section. Kip pays attention to details. After the work was done, Modern Habitat has been responsive to whatever issues that arose. We are truly appreciative!"

Lisa B on November 2023


"They did a fantastic job! They were professional, on time, did great work painting my house. They did both exterior and interior work. I am VERY pleased!"

Denise C on May 2024

It is the details that make a house a home. We will make sure that the first impression of your house counts. Give us a call today.

"They did a fantastic job! They were professional, on time, did great work painting my house. They did both exterior and interior work. I am VERY pleased!"

Denise C on May 2024


Avatar for Gowdy Group Design Build, LLC

Gowdy Group Design Build, LLC

14 Fiddle Neck Lane
5.00(
6
)
Approved Pro

Gowdy Group Design Build, LLC

14 Fiddle Neck Lane
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 years of experience

I take great pride in making your new house your home. After carefully listening to your needs and wants, I work with my team of professionals, including the architect, suppliers and tradespeople to design and build a house that is custom to you at a price that you can afford. My references can attest that I can make it happen for you. I strive to provide excellent customer service from start to completion and beyond through the warranty process, taking care to work and communicate with you our customer in a personal and professional manner. I look forward to building your new home.

"Ted built a 24x24 addition that involved dealing with Conservation over wetland issues. Quality work with attention to details and great design suggestions. I converted family room to garage and added mud room, laundry, bathroom and family room. Addition is beautiful. Would highly recommend."

Ginny G on May 2020

I take great pride in making your new house your home. After carefully listening to your needs and wants, I work with my team of professionals, including the architect, suppliers and tradespeople to design and build a house that is custom to you at a price that you can afford. My references can attest that I can make it happen for you. I strive to provide excellent customer service from start to completion and beyond through the warranty process, taking care to work and communicate with you our customer in a personal and professional manner. I look forward to building your new home.

"Ted built a 24x24 addition that involved dealing with Conservation over wetland issues. Quality work with attention to details and great design suggestions. I converted family room to garage and added mud room, laundry, bathroom and family room. Addition is beautiful. Would highly recommend."

Ginny G on May 2020


Matriarch Construction Inc

143 Swanton St
5.00(
1
)
Approved Pro

Matriarch Construction Inc

143 Swanton St
5.00(
1
)
Approved Pro
47 local quotes requested
2 years of experience

At Matriarch Construction, we take pride in our work. I promise to take extra care as if it were my own home. Let me show you why all my customers refer me to their friends and neighbors. We get the job done right the very first time, to eliminate any problems. We look forward to discussing your next project. We are women owned!!!

"Costs increased about 10% over estimate, work was well done and the final product was professional and well-built. Communication could have been better, the builder promised weekly meetings but that didn't happen. All in all, we were happy at the end of it all, and all questions were answered and all finishes to our satisfaction, which if you've ever worked with a contractor before, you know isn't a given. 5/5 would work with them again, the fireplace mantel and threshhold was particularly well done."

James P on August 2025

At Matriarch Construction, we take pride in our work. I promise to take extra care as if it were my own home. Let me show you why all my customers refer me to their friends and neighbors. We get the job done right the very first time, to eliminate any problems. We look forward to discussing your next project. We are women owned!!!

"Costs increased about 10% over estimate, work was well done and the final product was professional and well-built. Communication could have been better, the builder promised weekly meetings but that didn't happen. All in all, we were happy at the end of it all, and all questions were answered and all finishes to our satisfaction, which if you've ever worked with a contractor before, you know isn't a given. 5/5 would work with them again, the fireplace mantel and threshhold was particularly well done."

James P on August 2025


Avatar for Oska Construction INC.

Oska Construction INC.

4.88(
8
)
Approved Pro

Oska Construction INC.

4.88(
8
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
48 local quotes requested

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"5 stars. Jose and crew showed up on time and finished in 1 day. Very nice people. Reliable. Will definitely use them again."

Ivan R on February 2025

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"5 stars. Jose and crew showed up on time and finished in 1 day. Very nice people. Reliable. Will definitely use them again."

Ivan R on February 2025

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