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Addition & Remodeling Contractors in Cos Cob, CT

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Service Pros

    A2Z Contractors, LLC Logo
    Stamford, CT·

    A2Z Contractors, LLC specializes in 80% Interior Finish Carpentry and 20% Exterior Work., A2Z Contractors, LLC's Professional Team of Paint specializes in Exterior and Interior Paint using highest quality Benjamin Moore Paint for a more durable and everlasting color., Kitchen and Bath Update and Remodeling , and 12 more

    "A2Z Contractors helped me change the layout of an existing house extension and connect it to an unfinished lower level. A living room/kitchen combo became a bedroom and the new home of a laundry area. They installed a stairs to the lower level and finished the space by installing drywall, insulation, interior and exterior door, support beam and windows. They work started late December with a planned completion by February at the latest and they were completed by then. I was impressed that they stuck to the timeframe; and their professionalism and communication skills. Iâ ve already called on them for other asks and will continue to do so. I highly recommend working with A2Z Contractors LLC. I am enjoying my space!"

    Iman M. in July 2024

    HT
    Trumbull, CT·

    Remodeling

    "Bill and his crew replaced a deck and did a great job. I would definitely recommend this company."

    Eve R. in December 2020

    Cecy Gillen Designs, LLC Logo
    Norwalk, CT·

    Interior Design & General Construction, Kitchen and Bathroom Remodel, Additions and Extensions , and 2 more

    "We have worked with Cecy Gillen Designs on three home renovations (our primary bathroom, installing a mudroom, and installing a laundry room with cabinets and shelving) and we cannot recommend Cecy and her team highly enough. She has an excellent eye for design. Every time we present her with an idea, she internalizes our vision and improves upon it with her own great ideas. She responds to our questions and concerns in a timely manner and her team is efficient and friendly. We look forward to working with Cecy Gillen Designs on future home improvements."

    11AC46969E90CDD4B36049444159B6CDC0E44CDD6D34388E815B1F027E87B034 D. in November 2025

    C & C Quality Home Improvements, LLC Logo
    Greenwich, CT·

    Kitchen - Remodels, Basement - Remodels, Bathroom - Remodels

    "Excellent service and workmanship. Thank You Steve Shepard Port Chester New York"

    Steve S. in December 2021

    CC

    In business since 2004

    Stamford, CT·

    xx

    About us: "Welcome to Cardillo Construction LLC! We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you!"

    SD
    Bethel, CT·

    Trim Work, Wood Railing Installation and Repair, Cabinets

    "Very experienced and professional. Jacinto Salinas is a perfectionist. I have been so happy I found him! Thank you, Angie!"

    Elizabeth T. in October 2024

    BB
    Stamford, CT·

    Flooring, Concrete Patio Install, Renovation , and 1 more

    "They were great, quick and creative."

    Gustavo X. in July 2022

    FD
    Stamford, CT·

    Major Home Renovations, Remodels, Custom Built Homes

    "Frank is a nice guy, he works very efficiently and is knowledgeable. He added an addition over my garage, siding on my house and did a very nice pool deck for my above ground pool. Excellent communication and fair pricing. Very courteous and a great guy to work with."

    Phillip D. in October 2018

    Roger Greenwald Architect Logo

    greenwaldarchitects.com, Architect, Residential Architecture , and 4 more

    "Roger was a pleasure to work with. His quickly put together a plan that exceeded our initial expectations."

    Anthony G. in July 2024

    DD
    East Westport, CT·

    Design and Rendering

    "I highly recommend DDR. There are so many contractors out there and it is difficult to know what youâ ll get when you hire someone, from the quality of the work to the level of communication. This team did a great job from start to finish, and delivered a beautiful new space for my family. We selected DDR after getting multiple bids to update our walk-out basement into a more livable space. Key in this selection -- the price was competitive, and the team seemed attentive to the project needs as outlined. I had a tight budget and relatively aggressive timeline for this project. Admittedly the timeline was impacted by a few things that were out of DDRâ s control, including the Town building inspectorâ s schedule and a delivery delay (a new window arrived damaged and had to be reordered.) Nevertheless, the team stayed on budget and delivered a wonderful new basement. What a great project team -- led by Alex, the team (including John + Angel) truly transformed a dark dingy space into a bright fresh room. Alex was very thoughtful in suggesting options that would improve things and was exceptionally attentive to detail. He was super responsive to any texts or questions. In particular, I appreciated his high level of â perfectionismâ in how the finished product turned out. For phase 2, we need some custom cabinetry built for the space and I look forward to having the DDR team return to work on this next phase."

    Alison F. in November 2024

    IM
    Danbury, CT·

    Interlocking Pavers for Patios, Walks & Steps - Install or Replace, Brick and Stone Driveways & Floors - Install, Brick and Stone Patios, Walks, and Steps - Install , and 2 more

    "I have only just hired this pro. They have therefore not started the work yet. But my experience thus far has been excellent. Ilir really takes the time to talk to you about the details of the project and made an extra effort to come by when the railing company was also at my house. He inspires a lot of confidence as he seems to be very experienced and knowledgeable and have great ideas and excellent judgment. Additionally, his wife, Kristina, provides top-notch customer service, promptly answering any questions you have and being very helpful and pleasant."

    5433F213DA5069835C172CE6458BA3AA880DBF402EE8BD91AF08936E7FBB52B0 0. in March 2026

    RC
    Danbury, CT·

    "The Ra Carpentry team did a great job in my house. Qualified, attentive delivered my project on time."

    Anne L. in July 2024

    DK
    Darien, CT·

    Additions and remodels

    "Alex is a pro. Attentive to detail and easy to work with. I would recommend him to anybody."

    craig S. in January 2024

    Bryan Contracting, LLC Logo
    Bridgeport, CT·

    install new ( cabinets ) residential or commercial, ( trim ) ( crown molding ) ( base molding ) exterior , interior, Hardwere install , and 1 more

    "Finished ahead of schedule. Did everything well and hassle-free. Recommend"

    Walter S. in September 2019

    BCH Home Improvement Logo
    Fairview, NJ·

    7+ Years Experience

    "Byron was professional, courteous, prompt, on time, and fast."

    Ralph .. in April 2021

    TL

    In business since 2010

    Oxford, CT·

    About us: "We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!"

    Lux Renovations, LLC Logo
    Wethersfield, CT·

    Basement Remodel, In-Law apartments, Family Rooms , and 7 more

    "The true treasure of the experience was the carpenter, Balint, who was a very detail oriented craftsman. He worked long days, cleaned up space beautifully each day, communicated daily with us regarding the project. The electricians, Vince and Joe, were thorough and complete with all of their work. The project manager, Pete, stayed in touch regularly to complete the renovation on time."

    Mary D. in December 2019

    iBLUPRINTS Logo

    In business since 2017

    Milford, CT·

    Presentation Documents, Construction Documents

    About us: "Simply snap a few pictures using your own phone, and email them to us!! We turn your pictures and ideas into construction documents. Virtually walk through your addition before its even started, just like on your favorite TV shows! We are currently serving CT, MA, NH, NY, VT, NJ, PA, TX and TN. ALL GREAT PROJECTS START WITH GREAT PLANS"

    AS

    In business since 2000

    About us: "We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customer's interests and make their concerns the basis of our business."

    AR

    In business since 1984

    Waterbury, CT·

    Remodels

    About us: "We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 10 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!"

    LH
    Windsor, CT·

    Shower, Bathtub, and Walk-In Tub Installation

    "Chris Reynard was super kind and courteous... something you do not see much of anymore. He laid out all of the the available options for my wife and I and answered all of our questions. The initial meeting ended with me feeling confident in my choice to have work done on my new walk-in shower with Long. Thanks so much, Chris!"

    Samuel F. in May 2022

    Connecticut Basement Systems, Inc. Logo
    Seymour, CT·

    Basement Remodels, Basement Inspections and Basement or Foundation Waterproofing, Raise or Repair Foundations

    "CT Basement systems did a wonderful job on the walls that were flood damaged. Their overall system is great. We didn't need the total renovation but if we did, we would certainly have had them do it. After researching others, this was the best."

    Susan K. in December 2017

    Duarte Home Improvement, LLC Logo
    Danbury, CT·

    Interior Trimwork Install, Cabinet Install

    "Arnaldo and his team are excellent. The last project he did at my home was 4 outside door and frame repairs. He has also done 3 other projects at my residence in Roxbury CT and it was very well done. Attention to detail, very responsive and on schedule/ budget. Hire him for any project."

    Michael K. in November 2022

    JC
    NEW BRITAIN, CT, CT·

    Renovations

    "They set accurate expectations upfront and then communicate the projects. Good follow-through on what they will do. Very transparent and great communication on each and every project. They are very accurate on their budgeting and, as long as design-wise nothing changes, they are always on budget and on time. The best problem-solving crew out there. They figure out any issues that come up and come up with great solutions!"

    paul .. in June 2021

Showing 1-24 of 24 results

Frequently asked questions

  • It’s important that you verify their license is still in good standing. Also keep in mind that certain states or provinces don’t require licensing if the job is under a certain dollar amount.
  • You can find a list of your state’s licensing requirements on the HomeAdvisor website. Before you get to work with the pro, make sure their qualifications are current and acceptable to you.
  • It is always a good idea to get a copy of the pro’s insurance certificate for future records, and in case anything happens. This is a good way to feel more secure in your home project, and to weed out potential scammers.

HomeAdvisor makes it easy to connect with pros near you. You can read reviews, get quotes and book appointments all in one place.

Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.

You can use HomeAdvisor to help evaluate a contractor’s qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a pro’s HomeAdvisor profile, and sometimes, his or her website. 

Your research doesn’t stop here. Once you’ve found a few prospective companies, make an call to ask a few questions about work history, licensure and more:

  • Have you completed a job like this before?
  • Do you have a list of references I can contact?
  • When are you able to start the job?

In most cases, the responses you get to these three questions will give you a very good idea of the right pro for your project. If you have more than one front-runner, these additional questions can help you narrow it down. 

  • How many years of experience do you have?
  • What’s your permanent business address?
  • Are you licensed to work in my area?
  • When did you earn your business license?
  • How do you handle warranty service complaints?
  • Do you have worker’s compensation, property damage and personal liability insurance?

Any good contractor will answer these questions, and most will appreciate dealing with a client that takes such an active interest in finding good service. On the other hand, if a contractor gives you a hard time with these questions, you probably want to find someone else.  

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HomeAdvisor Community Rating

Overall Rating:

Cos Cob Addition & Remodeling Contractors are rated 4.8 out of 5 based on 620 reviews of 620 pros.

The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.


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