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

Avatar for iCornerstone, Inc.
iCornerstone, Inc.
4.9(
58
)
Addition to Existing Structure - Build

Serving Quincy, MA and surrounding areas

Approved

In business since 1988

Customers say: True professional

"My wife and I were looking to have an addition built on our 2 bedroom / 1 bath home back in the winter of 2022. After a phone conversation with Richard, we decided to have him come out to the house. He was very clear with the iCornerstone process, and the benefits of using this process. He is meticulous in measuring and understanding the existing structure. There are no guesstimates and all cost projections are based on the actual materials and labor needed to complete the work. Having such clarity regarding costs before any work begins is not something I've seen in this industry prior to this experience. It was certainly a welcome change. We now have plans for a home addition and complete control over the project. We decide the scope and can customize the plan to our budget. We are grateful to have worked with Richard, and highly recommend him!"
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 Quincy, 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 Quincy, 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."
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+25

Response time2 days
Response rate100%
10 neighbors recently requested a quote
Avatar for D & R Construction
D & R Construction
4.7(
31
)
Addition to Existing Structure - Build

Serving Quincy, MA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Eric's team rebuilt our entire three season room, which was not functional. It is now, thanks to Mike and Brian. It also looks very good! Mike works hard at getting things done, and teaches the younger crew very well. He is structured and trustworthy. He also was patient answering my questions (I always have too many..!). Brian pays great attention to detail! I was impressed by how good the tile work looks, and also how good the finishing of the decking to the landing looks like, which he did. They also had to partly redo the patio, and it looks better than before."
Response time4 days
Response rate100%
Recommended by89%of homeowners
Avatar for DiOrio Builders & Designers Inc
DiOrio Builders & Designers Inc
4.5(
139
)
Addition to Existing Structure - Build

Serving Quincy, 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
1 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Neary Construction
Neary Construction
4.8(
174
)
Addition to Existing Structure - Build

Serving Quincy, 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 US ProPaint and Renovation, Inc.
US ProPaint and Renovation, Inc.
4.6(
280
)
Addition to Existing Structure - Build

Serving Quincy, 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
819 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 Quincy, MA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I am very pleased with the work completed by Crystal Renovations in my home. The company's owner, Pedro Quissalga, is knowledgeable and has a fantastic crew. He implemented the bathroom, laundry, and closet design ideas beautifully. A critical positive factor was communication. Pedro was responsive to my questions and concerns. He kept me informed every step of the way during the construction. Another important factor was their care in keeping the renovation project clean and organized. The team was also mindful of how the construction may impact the rest of the building and did their best to keep the noise level down. I highly recommend Crystal Renovations."
Remodeling - General Project
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+10

Response time3 days
3 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for HS General Contracting
HS General Contracting
4.8(
84
)
Addition to Existing Structure - Build

Serving Quincy, MA and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"Humberto and his crew were fantastic and we will definitely hire them again for future projects. The quality of work is amazing. We're so happy with our new rooms! Humberto scheduled the first day of work within a week of us contacting him. He responded to all emails within the same day and always arrived on time or even early! In addition, Humberto and his crew were professional, courteous, and very neat. I highly recommend HS Plastering & Painting."
Bathroom remodeling - Newton, MA
Wooden Outdoor Bathhouse for Backyard
Bathroom remodeling
Kitchen Remodeling
She Shed

+53

Response time11 hrs
Response rate100%
Recommended by97%of homeowners
Mavridis Contracting Services
5.0(
15
)
Addition to Existing Structure - Build

Serving Quincy, MA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"I wanted a shower expanded. George Mavridis's estimate was very competitive but I hired him because I knew he was honest, quality focused and an open communicator. He has a small crew and excellent subs so he's not super fast. But Mavridis is excellent. One example: The shower needed a new fan, vented through the attic roof. The attic boards were all cut (before my time) in half when insulation was installed. The attic floor was unstable and unsafe. George was very busy but he had his team replace the boards with plywood panels...for 20% less than I expected. Why? Because he wanted to make sure I would be happy when the job was done. I could give 4-5 other examples but you get the point. If you hire George, you'll be pleased."
Condo Reno
Condo Reno
Condo Reno
Condo Reno
Condo Reno

+73

3 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Quincy, 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 Quincy, 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.