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Top-Rated Addition to existing structure builders in Plymouth - Updated Nov 2026

Avatar for Casieri Construction Co, LLC
Casieri Construction Co, LLC
5.0(
30
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

In business since 1989

Free estimates

Credit card accepted

"Hired Casieri construction to build decks and a carport as part of a new construction project. James and his crew do a great job and he is very responsive and timely. I would highly recommend them for any projects!"
Front view
Side view
Front view
After photo
Front view

+26

Response time10 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for iCornerstone, Inc.
iCornerstone, Inc.
4.9(
58
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

In business since 1988

Customers say: True professional

"Richard's the owner and independent contractor. He doing's the job more then beyond his duties and working with engineers with all there requests to complete the job. I'm so happy to work with Richard and 100% satisfied with his performing, Any one out there needs something for your addition to your house Richard's the men you can count on !!!!!!"
Entertainment center
Entertainment center
Architectural details
computer room left
computer room right

+11

Response time8 hrs
Response rate100%
Recommended by91%of homeowners
Avatar for MMP Construction Inc
MMP Construction Inc
4.6(
222
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"We had a very small roof area need to be repaired. I sent request to multiple company to give a service quote. Few of them sent me replies and stated that they are too busy to come. Matt of MMP Consturction's contacted me promptly, scheduled an on-site visit and gave us a quote right away. The work was then scheduled and finished quickly. Matt did great job on reaching out, effective communication, and always arriving on-time. He also gave an evaluation on our roof condition. Also, Eric and Don did excellent job on finishing the project. They are all very polite, knowledgeable, and showed their professionalism. We would like to express our sincere appreciation to Matt and his crew. We are very grateful for having them arriving on-time before the winter storm to prevent potential damage of the house. From their react, we see a warm heart. No job is big or small, all jobs are equally important. Understanding the difficulties of others, for the people, been appreciated by the people. Thank you again for your high quality service. We definitively recommend MMP Construction Inc. to anyone for any related home project."
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+154

Recommended by89%of homeowners
Avatar for Redman Construction Inc.
Redman Construction Inc.
4.5(
75
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

In business since 1990

Free estimates

Credit card accepted

"Jim and the crew at Redman Construction Inc are all top shelf. They did an excellent job on a bathroom remodel. They were neat, courteous, and efficient as well as fair and reasonable with pricing. To the penny on their estimate. Great job from start to finish."
Additional Photos
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+25

Response time2 days
Response rate100%
10 neighbors recently requested a quote
Avatar for Neary Construction
Neary Construction
4.8(
174
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"Any construction can be stressful, but with Liam and his team I was in good hands. I had some upgrades to one bathroom and a tub to shower conversion in the master bathroom. Liam was clearly very knowledgeable, and his workmanship in both bathrooms was impeccable. He answered all my questions, had great suggestions and was very responsive whenever I needed to contact him. The demo in the master was completed in a day, and the guys cleared everything after they finished. The tile work was meticulous and just beautiful. I highly recommend Liam Neary Construction."
After a little framing is done we start closing up the walls
Another view of recess cabinet and vanity cabinet
This is the Bathroom before demo
Tiling done before final fixtures got installed
Corner shelves

+27

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for DiOrio Builders & Designers Inc
DiOrio Builders & Designers Inc
4.5(
140
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1966

Free estimates

Emergency services offered

"We worked primarily with James to have a skylight installed in our recently constructed bathroom, as well as replacing an existing window in a bedroom, and adding a storm door. He was prompt and communicative, and very diligent about ensuring the space was clean and tidy after the work was completed. We are very happy with the installation of the windows and storm door and would recommend!"
Addition - Westwood
Addition - Westwood
Addition - Westwood
Addition - Westwood
Addition - Westwood

+36

Response time10 hrs
Recommended by82%of homeowners
Avatar for US ProPaint and Renovation, Inc.
US ProPaint and Renovation, Inc.
4.6(
280
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2003

Free estimates

Emergency services offered

"I hired US ProPaint and Renovation after meeting JR, discussing my project, and receiving what I thought was a fair and thorough proposal describing the work to be completed in 2 bathrooms. The team that worked in my home was professional, and they arrived on time each day. They were very careful to clean up after themselves each day. JR and his team also made sure, for each key piece of the project, that products were installed as I wanted them and that I was pleased with their progress. The team removed a vanity and granite countertops, installed a new bathroom vanity, installed LVT flooring in 2 bathrooms with transitions to meet the existing wood floors, installed new toilets, and then painted ceilings, doors, trim, and walls. The entire process was excellent and the best experience I’ve had with a company doing renovation work in my home. I’d use US ProPaint again and have recommended them to others."
After
Kitchen after
After
Exterior siding
Siding

+791

Response time1 day
728 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Crystal Renovations LLC
Crystal Renovations LLC
4.9(
64
)
Addition to Existing Structure - Build

Serving Plymouth, MA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Pedro Quissanga was wonderful throughout the process. The project started out as a porch window replacement with an architect drawing plans, but once we started construction, we discovered that the whole underneath part was rotting and needed reconstruction. Pedro and his crew were hard working, reliable and careful, and his price for all of the work was very reasonable. When something went awry late in the construction, Pedro took it seriously and got people over within hours to locate the issue and fix the problem. Even though the project ended up being much more difficult than initially expected, there were never any unexpected charges and the additional work was at a consistent high level. We recommend Crystal Renovations without reservation and have several neighbors using them now for small-to-medium sized projects."
Remodeling - General Project
Additional Photos
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Additional Photos

+10

Response time3 days
3 neighbors recently requested a quote
Recommended by94%of homeowners
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FAQs for addition to existing structure building service projects in Plymouth, MA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Plymouth, 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.