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Addition to existing structure builders in Andover
Walczak Design + Build, is your solution for all your major remodel & renovation needs. We take great pride in our extreme professionalism, collaborative process and superior customer service on each and every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Be sure to check out our projects and references. We're looking forward to speaking with you.
"Derek has been great to work with, each day when they finish working you would never know any work has been going on, so clean. Derek and his crew have been great and if any of my friends that are looking for a contractor I will tell them about Derek."
Wayne K on October 2017
Walczak Design + Build, is your solution for all your major remodel & renovation needs. We take great pride in our extreme professionalism, collaborative process and superior customer service on each and every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Be sure to check out our projects and references. We're looking forward to speaking with you.
"Derek has been great to work with, each day when they finish working you would never know any work has been going on, so clean. Derek and his crew have been great and if any of my friends that are looking for a contractor I will tell them about Derek."
Wayne K on October 2017
Pelletier Remodeling has been servicing Massachusetts for over 21 years. Family owned and operated by Dave Pelletier, Dave brings quality and service as it should be to your home. Whether it is a kitchen or bath remodel or a major addition, Dave and his team give you the same quality and craftsmanship you deserve.
"Dave and his crew were very easy to work with. They showed up everyday and kept the project on schedule. Worked well with changes on the fly and was open and upfront about what any cost implications would be. 100% would use them for our next project."
Matt P on September 2023
Pelletier Remodeling has been servicing Massachusetts for over 21 years. Family owned and operated by Dave Pelletier, Dave brings quality and service as it should be to your home. Whether it is a kitchen or bath remodel or a major addition, Dave and his team give you the same quality and craftsmanship you deserve.
"Dave and his crew were very easy to work with. They showed up everyday and kept the project on schedule. Worked well with changes on the fly and was open and upfront about what any cost implications would be. 100% would use them for our next project."
Matt P on September 2023
We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of residential and commercial renovation and new construction services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction! Ask us for a list of our references.
We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of residential and commercial renovation and new construction services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction! Ask us for a list of our references.
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.
M.R. Norman Builders takes pride in professional, prompt service, and following a schedule to ensure our client's project is finished on time. All work is licensed, insured, and backed by a full warranty that will exceed expectations. We will design and build your new home, addition, or kitchen/bath for free and provide you with a free competetive estimate. All calls are returned promptly - Call Ryan Norman for a free consultation today!
"Norman Properties and Development did a fantastic job with our home addition project. Their attention to quality, detail, and superior workmanship has produced a finished product that is the envy of the entire neighborhood. The professionalism and dedication displayed on a daily basis made this project an extremely positive experience for my family. I enthusiastically recommend Norman Properties and Development to anyone considering a home construction project. You'll be glad you did."
Donald Z on October 2011
M.R. Norman Builders takes pride in professional, prompt service, and following a schedule to ensure our client's project is finished on time. All work is licensed, insured, and backed by a full warranty that will exceed expectations. We will design and build your new home, addition, or kitchen/bath for free and provide you with a free competetive estimate. All calls are returned promptly - Call Ryan Norman for a free consultation today!
"Norman Properties and Development did a fantastic job with our home addition project. Their attention to quality, detail, and superior workmanship has produced a finished product that is the envy of the entire neighborhood. The professionalism and dedication displayed on a daily basis made this project an extremely positive experience for my family. I enthusiastically recommend Norman Properties and Development to anyone considering a home construction project. You'll be glad you did."
Donald Z on October 2011
The absolute. is a trusted general contractor based in Needham, MA, serving Middlesex and Norfolk counties. Specializing in wide range of services: new custom home construction, kitchen and bathroom remodels, major home renovations, and additions, they bring expert craftsmanship to every project residential or commercial. From custom home building to outdoor kitchens and sunroom enclosures, our team delivers high-quality results with a personalized touch. Whether it's a single-room remodel or a multi-room overhaul, the Absolute prioritizes detail, function, and design excellence. We proudly serve towns including Arlington, Newton, Brookline, Wellesley, and more throughout the region.
"We had a great experience working with Absolute Improvement on our home project. From day one, they were professional, organized, and easy to communicate with. They kept us updated throughout the process, handled unexpected issues without drama, and stayed on schedule — which was a huge relief. The quality of their work speaks for itself. Every detail was done with care, and the crew was respectful and clean. We’re really happy with the results and would absolutely recommend Absolute Improvement to anyone looking for a reliable, skilled general contractor. "
Gil D on May 2025
The absolute. is a trusted general contractor based in Needham, MA, serving Middlesex and Norfolk counties. Specializing in wide range of services: new custom home construction, kitchen and bathroom remodels, major home renovations, and additions, they bring expert craftsmanship to every project residential or commercial. From custom home building to outdoor kitchens and sunroom enclosures, our team delivers high-quality results with a personalized touch. Whether it's a single-room remodel or a multi-room overhaul, the Absolute prioritizes detail, function, and design excellence. We proudly serve towns including Arlington, Newton, Brookline, Wellesley, and more throughout the region.
"We had a great experience working with Absolute Improvement on our home project. From day one, they were professional, organized, and easy to communicate with. They kept us updated throughout the process, handled unexpected issues without drama, and stayed on schedule — which was a huge relief. The quality of their work speaks for itself. Every detail was done with care, and the crew was respectful and clean. We’re really happy with the results and would absolutely recommend Absolute Improvement to anyone looking for a reliable, skilled general contractor. "
Gil D on May 2025
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 are a locally owned and operated company with many years of industry experience. We value honesty and integrity, and stand behind our work. We specialize in all phases of construction from structural framing, to decorative molding installation, and a variety of related projects. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction!
"Pierre construction is Awesome!!! If you’re looking to have someone to do your next project, look no further. I spent quite a bit of time interviewing and getting quotes for a major 2 story deck project for my house which included some intense structural improvements to my house as well, since some of the existing columns where in tough shape. I’m so glad that I picked Dave Pierre and his great crew to do this for me! Dave’s price was very reasonable and he was very much on top of all details. He bent over backwards to make sure that I was happy with every step of the project. His crew of over 12 years was also very skilled and often had discussions about challenges to make sure the details where the best that they could be before proceeding on the the next phases. As you can see from the attached video of the 2nd floor, the results are fantastic and I’m enjoying my new space immensely. "
Stephen H on May 2025
We are a locally owned and operated company with many years of industry experience. We value honesty and integrity, and stand behind our work. We specialize in all phases of construction from structural framing, to decorative molding installation, and a variety of related projects. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction!
"Pierre construction is Awesome!!! If you’re looking to have someone to do your next project, look no further. I spent quite a bit of time interviewing and getting quotes for a major 2 story deck project for my house which included some intense structural improvements to my house as well, since some of the existing columns where in tough shape. I’m so glad that I picked Dave Pierre and his great crew to do this for me! Dave’s price was very reasonable and he was very much on top of all details. He bent over backwards to make sure that I was happy with every step of the project. His crew of over 12 years was also very skilled and often had discussions about challenges to make sure the details where the best that they could be before proceeding on the the next phases. As you can see from the attached video of the 2nd floor, the results are fantastic and I’m enjoying my new space immensely. "
Stephen H on May 2025
Our company welcomes you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality craftsmanship will accurately reflect your tasks and lifestyle. We are known for our prompt service and superior attention to detail. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You will be pleased you did. Thank you
"Rubem and his team are outstanding. They are methodical, detail oriented and do such great and clean work. He’s the best gc I’ve ever had the pleasure of working with."
Shaunt K on February 2025
Our company welcomes you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality craftsmanship will accurately reflect your tasks and lifestyle. We are known for our prompt service and superior attention to detail. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You will be pleased you did. Thank you
"Rubem and his team are outstanding. They are methodical, detail oriented and do such great and clean work. He’s the best gc I’ve ever had the pleasure of working with."
Shaunt K on February 2025
Transforming Homes, Enhancing Lives At Flagg Builders, we specialize in bringing your vision to life with expert craftsmanship and attention to detail. From kitchen and bath renovations to full home remodels, we create spaces that reflect your style and enhance your daily living. Whether you're dreaming of a stunning deck, a welcoming porch, or a spacious room addition, our skilled team ensures seamless design and construction. For those looking to start fresh, we also offer new home construction, guiding you every step of the way to build the home you've always wanted. With a commitment to quality, reliability, and customer satisfaction, we take pride in delivering results that exceed expectations. Let’s build something incredible together! Keith Flagg - Licensed Contractor - CSL & HIC Glenn Shaw
"Flagg Builders did a complete finished basement project last summer for us. A living room, game area, gym, and bathroom. Keith is a unicorn in construction. He has the utmost integrity. We had built a custom colonial 4 years ago. Flagg matched all of the custom materials and workmanship. He even went out of his way to use the same custom materials and supplier as our original builder, whom we loved. We also challenged Keith to match the custom first floor stair case in our basement. He relished the challenged and really aced it with very impressive craftsmanship. Leaves the job area immaculate after each, and often long, work days. He is phenomenal to work with not just his talent but his people oriented demeanor. Very personable and friendly. Listens intently. Genuinely cares that his customers are happy. Again this guy is a unicorn. Town inspectors were impressed by his work. One stating ?framing is the best that I?ve seen?. TEN STARS!! Five from me and five from my wife!! "
Lou M on May 2025
Transforming Homes, Enhancing Lives At Flagg Builders, we specialize in bringing your vision to life with expert craftsmanship and attention to detail. From kitchen and bath renovations to full home remodels, we create spaces that reflect your style and enhance your daily living. Whether you're dreaming of a stunning deck, a welcoming porch, or a spacious room addition, our skilled team ensures seamless design and construction. For those looking to start fresh, we also offer new home construction, guiding you every step of the way to build the home you've always wanted. With a commitment to quality, reliability, and customer satisfaction, we take pride in delivering results that exceed expectations. Let’s build something incredible together! Keith Flagg - Licensed Contractor - CSL & HIC Glenn Shaw
"Flagg Builders did a complete finished basement project last summer for us. A living room, game area, gym, and bathroom. Keith is a unicorn in construction. He has the utmost integrity. We had built a custom colonial 4 years ago. Flagg matched all of the custom materials and workmanship. He even went out of his way to use the same custom materials and supplier as our original builder, whom we loved. We also challenged Keith to match the custom first floor stair case in our basement. He relished the challenged and really aced it with very impressive craftsmanship. Leaves the job area immaculate after each, and often long, work days. He is phenomenal to work with not just his talent but his people oriented demeanor. Very personable and friendly. Listens intently. Genuinely cares that his customers are happy. Again this guy is a unicorn. Town inspectors were impressed by his work. One stating ?framing is the best that I?ve seen?. TEN STARS!! Five from me and five from my wife!! "
Lou M on May 2025
FAQs for addition to existing structure building service projects in Andover, MA
Yes, you can add a bathroom on a concrete slab, but the crew will need to saw-cut the slab, trench in new supply and drain lines, and then patch the concrete without weakening the foundation. Working with an experienced plumber and concrete pro keeps the structure intact and helps the new bathroom pass inspections.
schedule covers planning, permits, framing, rough-ins, finishes, and punch-list items.
Larger spaces or extensive plumbing and electrical upgrades can stretch the timeline, while a simple powder-room conversion may wrap up faster. Hiring licensed pros helps keep the schedule on track and the work up to code.
The best location depends on how your family uses the space. An upstairs bath keeps nighttime trips close to the bedrooms, while a first-floor powder room is handy for guests and everyday traffic.
Think about where plumbing lines already run, how much square footage you can spare, and what layout changes fit your budget. A pro can map out the smartest spot and handle any code hurdles.
With the right planning, you can carve out a bathroom in almost any part of the house. A successful addition requires sufficient space, proper ventilation, and access to plumbing and electrical systems. Structural modifications and adherence to building codes are essential.
This process demands careful planning and the coordination of specialized professionals who ensure that the new space meets all code requirements and functional needs.
Under specific conditions, adding an extra bedroom can boost home value more than adding a bathroom. Home value is driven by overall configuration, market demand, and functional balance. A new bedroom influences the property’s appeal in different ways, while an additional bathroom enhances living convenience. Evaluating the current layout and market trends determines the optimal choice for maximum value.
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