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Find Addition to existing structure builders in Groton

Avatar for Hancock Building Associates Inc

Hancock Building Associates Inc

248 Mill Rd
4.88(
67
)
•Approved Pro

Hancock Building Associates Inc

248 Mill Rd
4.88(
67
)
•Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
17 local quotes requested

The complete residential remodeling company for over forty years. We have ten full time, year-round area craftsmen that work exclusively for us full time. We limit subcontracting & focus on quality & standing behind our work. Home improvement registration #100158, construction supervisor license #16524, certified aging-in-place specialist, certified master roofer, vsi certified master vinyl sider, certified skylight installer. Call us today! (978)256-2727

"Attention to detail , timely delivery , team coordination and voila a lovely renovation . Such a pleasure to work with ! Thank you so much . This motivated me to renovate the other parts of my home with you ! Thank you most of all for helping my dreams come true ."

Ratti H on June 2023

The complete residential remodeling company for over forty years. We have ten full time, year-round area craftsmen that work exclusively for us full time. We limit subcontracting & focus on quality & standing behind our work. Home improvement registration #100158, construction supervisor license #16524, certified aging-in-place specialist, certified master roofer, vsi certified master vinyl sider, certified skylight installer. Call us today! (978)256-2727

"Attention to detail , timely delivery , team coordination and voila a lovely renovation . Such a pleasure to work with ! Thank you so much . This motivated me to renovate the other parts of my home with you ! Thank you most of all for helping my dreams come true ."

Ratti H on June 2023


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.


Avatar for Stellar Painting & Remodeling LLC

Stellar Painting & Remodeling LLC

P.O. Box 335
4.85(
27
)
•Approved Pro

Stellar Painting & Remodeling LLC

P.O. Box 335
4.85(
27
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
20 local quotes requested

At Stellar painting & Handymen Services passion and commitment comes together to give customers the best possible service, quality and value. We provide painting, power washing, carpentry, total bathroom and kitchen renovations, hardwood and tile floor installation, and backsplash. FREE ESTIMATES!!!

"Absolutely AMAZING job! We have been searching for a general contractor for almost 6 months to take care of several projects on the exterior of our home. We had worked with Stellar Painting before when our insurance company paid for a door and window repair. After a phenomenal job and a great experience, I called them again to see if, by some miracle, they could handle a list of repairs for the exterior of our home. After coming out, giving an estimate, and providing a start time - I couldn't believe how quickly everything was done! They fixed everything (and that was one heck of a list)! Our deck is so beautiful, I can't stop staring at it. Light poles that a previous masonry company installed are standing tall and proud (versus lump-sided like they have been for years now!) The list goes on. The exterior of our home looks brand new thanks to them. I can't believe how quick and easy it all was. Love the crew as well - Monique is amazing and Eduardo is SO nice and extremely talented! Everyone that came out was super sweet. They will definitely be my go-to from now on."

LaKenya K on October 2023

At Stellar painting & Handymen Services passion and commitment comes together to give customers the best possible service, quality and value. We provide painting, power washing, carpentry, total bathroom and kitchen renovations, hardwood and tile floor installation, and backsplash. FREE ESTIMATES!!!

"Absolutely AMAZING job! We have been searching for a general contractor for almost 6 months to take care of several projects on the exterior of our home. We had worked with Stellar Painting before when our insurance company paid for a door and window repair. After a phenomenal job and a great experience, I called them again to see if, by some miracle, they could handle a list of repairs for the exterior of our home. After coming out, giving an estimate, and providing a start time - I couldn't believe how quickly everything was done! They fixed everything (and that was one heck of a list)! Our deck is so beautiful, I can't stop staring at it. Light poles that a previous masonry company installed are standing tall and proud (versus lump-sided like they have been for years now!) The list goes on. The exterior of our home looks brand new thanks to them. I can't believe how quick and easy it all was. Love the crew as well - Monique is amazing and Eduardo is SO nice and extremely talented! Everyone that came out was super sweet. They will definitely be my go-to from now on."

LaKenya K on October 2023


[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 A Pineo Construction

A Pineo Construction

123 Main St.
5.00(
5
)
•Approved Pro

A Pineo Construction

123 Main St.
5.00(
5
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
201 local quotes requested

A Pineo Construction is a Family Owned and Operated business. We provide home building, site development services and all aspects of construction for residential customers, builders, and commercial developers. We specialize in Home Construction and Additions as well as Roads, Subdivisions, House Lots, Underground Utilities, and Septic Systems. We also provide landscaping services such as retaining walls, drainage and yard renovations. We have been in business for over 30 years. We work successfully with Homeowners, Architects, General Contractors and Commercial Developers. We have the skills, experience and talent and we get things done on time. If you want a professional, experienced, and knowledgeable site contractor or builder please give us a call.

"They built two great projects for me so far. In 2019 they built a 14x12 chicken run onto my existing Reeds Ferry Shed 14x20 coop. In 2022 they built a 34x30 garage addition with apartment above."

Joanne Q on March 2024

A Pineo Construction is a Family Owned and Operated business. We provide home building, site development services and all aspects of construction for residential customers, builders, and commercial developers. We specialize in Home Construction and Additions as well as Roads, Subdivisions, House Lots, Underground Utilities, and Septic Systems. We also provide landscaping services such as retaining walls, drainage and yard renovations. We have been in business for over 30 years. We work successfully with Homeowners, Architects, General Contractors and Commercial Developers. We have the skills, experience and talent and we get things done on time. If you want a professional, experienced, and knowledgeable site contractor or builder please give us a call.

"They built two great projects for me so far. In 2019 they built a 14x12 chicken run onto my existing Reeds Ferry Shed 14x20 coop. In 2022 they built a 34x30 garage addition with apartment above."

Joanne Q on March 2024


B LAGRASSA CONSTRUCTION LLC

240 Old Main St
4.32(
14
)
•Approved Pro

B LAGRASSA CONSTRUCTION LLC

240 Old Main St
4.32(
14
)
•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


"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 D.A. Kinsella Company

D.A. Kinsella Company

1A Andover Rd.
4.39(
29
)
•Approved Pro

D.A. Kinsella Company

1A Andover Rd.
4.39(
29
)
•Approved Pro
Customers say: Quick response
26 local quotes requested
35 years of experience

d. a. kinsella company has been under the same creative management since 1990 and has completed hundreds of residential and commercial projects for private sector clients, including home and business owners, property managers, developers and local government. As an architectural firm, d. a. kinsella company offers architectural and construction management services, which include the preparation of: home and house plans, home designs, residential architecture, interior design and planning; construction plans and construction management services, cost estimates and construction management.

"From the very first meeting through the entire work they did they were very professional. I had a roof repair and other construction work done and I am very pleased with the quality of their work. I will definitely hire them agian and in the process of going over window replacement with them. Excellent job!"

John H on November 2021

d. a. kinsella company has been under the same creative management since 1990 and has completed hundreds of residential and commercial projects for private sector clients, including home and business owners, property managers, developers and local government. As an architectural firm, d. a. kinsella company offers architectural and construction management services, which include the preparation of: home and house plans, home designs, residential architecture, interior design and planning; construction plans and construction management services, cost estimates and construction management.

"From the very first meeting through the entire work they did they were very professional. I had a roof repair and other construction work done and I am very pleased with the quality of their work. I will definitely hire them agian and in the process of going over window replacement with them. Excellent job!"

John H on November 2021


"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


Avatar for New England Carpentry Inc

New England Carpentry Inc

18 Burnett Road
5.00(
40
)
•Approved Pro

New England Carpentry Inc

18 Burnett Road
5.00(
40
)
•Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
61 local quotes requested

**Due to our current installation schedule our minimum project is $10,000** Please call today to schedule your appointment 857-991-5434 We value our clients and always give our best. As the company owner, site supervisor and contractor, I personally manage the jobs to make sure we are achieving the highest possible standards. Our work is done with trusted in-house crews who I have worked with for years. New England Carpentry is fully licensed, registered and insured. Do not hesitate to call for a free estimate or for more information.

"Great job 👏"

Larry C on August 2025

**Due to our current installation schedule our minimum project is $10,000** Please call today to schedule your appointment 857-991-5434 We value our clients and always give our best. As the company owner, site supervisor and contractor, I personally manage the jobs to make sure we are achieving the highest possible standards. Our work is done with trusted in-house crews who I have worked with for years. New England Carpentry is fully licensed, registered and insured. Do not hesitate to call for a free estimate or for more information.

"Great job 👏"

Larry C on August 2025

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

  • A modern dining room boasts a black dining table
    •

    The cost to build a dining room depends on whether you convert an existing space or add an extension, along with the materials you use and the quality of the finish.

  • 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.