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

Avatar for A2Z Contractors, LLC
A2Z Contractors, LLC
4.6(
133
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"I recently hired A-Z Contracting and Weslyn for a laundry room build and a bathroom renovation, and I couldn’t be happier with the results. They built our new laundry room from scratch, including all new plumbing, electrical work, and a new dryer vent installation. They also renovated and extended our bathroom, and the finished space looks fantastic. Weslyn and his team were trustworthy, punctual, and extremely reliable throughout the entire project. I felt completely comfortable giving them access to my home while I wasn’t there, which says a lot about their professionalism and integrity. The craftsmanship is excellent, and the attention to detail really shows in the finished work. All of the workers were knowledgeable, polite, and respectful of our home. The project was completed efficiently and to a very high standard. I would absolutely use A-Z Contracting again and highly recommend Weslyn and his team to anyone looking for quality work done right."
bathroom
bathroom
bathroom
bathroom
bathroom

+5

Response time2 days
16 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Solimine Contracting, LLC
Solimine Contracting, LLC
4.0(
47
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"I hired Solimine to build an addition sun-room and attached deck from a hand sketch of what I envisioned. They were able to create just about exactly what I was envisioning from the sketch. Work was very professional and all the crew were responsive to questions and comments as they arose. They were also willing to work with me on cost and payments allowing me to upgrade from the original sketch. I would definitely hire them again."
Eclectic Kitchen - Red Open Stainless Steel Appliances
Traditional Kitchen - Red Open Small Light Gray Tile Back Splash
Kitchen
New Canaan Home Renovation
Wrap Around Porch

+323

Response time2 days
35 neighbors recently requested a quote
Recommended by63%of homeowners
Avatar for TimberWolf Contracting LLC.
TimberWolf Contracting LLC.
4.2(
55
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

"The work was done in a timely manner, and as I was told we needed to wait to paint the stairs, and that was the last item, i paid in full. It has now been over a year and i keep requesting that they come out and complete the work, and i receive no response. Disappointed."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response rate100%
1 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for MDI Construction, LLC
MDI Construction, LLC
4.4(
19
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

In business since 2012

Free estimates

Offers commercial services

"This man Misha performed a miracle for me! My custom railings came out exactly they way they were supposed to. The price was great and I will definitely hire him again to do more work! Thank you Misha!"
Full House Renovation
Interior works. Greenwich
New Home Building
Full House Renovation
Interior works. Greenwich

+49

Response time6 hrs
Response rate100%
Recommended by94%of homeowners
Avatar for JR General Contractor, LLC
JR General Contractor, LLC
4.8(
15
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

In business since 2010

Free estimates

Small jobs welcome

"Juliano nice person but?I always get 3 estimates he was most reasonable but quality of work is just ok not great . He built my Pergola and paint job from his worker not great had to come back for do over. Then year later called him and text for him to come look at his work wood splitting and now looking for someone to fix because he doesn?t answer my calls :( you get what you pay for I guess."
Footings starts
Footings starts
footings
concrete day
concrete day

+65

Response time2 days
Recommended by86%of homeowners
Avatar for TITO'S HOME IMPROVEMENT CONTRACTORS
TITO'S HOME IMPROVEMENT CONTRACTORS
4.1(
25
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

Customers say: Super punctual

"Excellent - Tito was extremely responsive and his team did excellent work. I shopped around and got multiple quotes, and his was the lowest. More importantly, he had done work on a number of my neighbors’ homes and came highly recommended. His team was very responsive and got the work done on a short time frame which was great because I needed much of the work done before I moved in to my new home. My floors and skylights look great and I have full confidence in his work. One thing which I really liked is the fact that he is constantly in communication, is always available, and is local. The last part is important because he understands the importance of reputation which gives me full confidence in his work. I will definitely be coming back to him again for any future work on my house and wholeheartedly recommend!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+25

Response time9 hrs
Recommended by90%of homeowners
Avatar for Reed Construction, LLC
Reed Construction, LLC
5.0(
6
)
Addition to Existing Structure - Build

Serving Old Greenwich, CT and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"I highly recommend Reed Construction LLC. They renovated both of my bathrooms and delivered exceptional quality from start to finish. They listened carefully to all of my concerns, addressed every issue promptly, maintained excellent communication throughout the entire project. Their professionalism, attention to detail, and commitment to customer satisfaction truly sets them apart."
Cranberry Kitchen.
Cranberry Kitchen.
Cranberry Kitchen.
Cranberry Kitchen.
Cranberry Kitchen.

+4

1 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Old Greenwich, CT

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 Old Greenwich, CT 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.