J. B. Cote Construction is an ADU contractor in Rhode Island & Massachusetts, specializing in detached ADUs, garage conversions, in-law suites & more. They manage design, permitting, zoning & energy-efficient construction from start to finish.

JB Cote Construction, Cumberland, RI

About JB Cote Construction

ADU Construction Services in Rhode Island & Massachusetts

J. B. Cote Construction operates as an ADU contractor serving both Rhode Island and Massachusetts. The company specializes in designing and building accessory dwelling units (ADUs), offering solutions for homeowners looking to add functional living space to their property. Their work covers a range of ADU types, from detached structures to garage conversions and in-law suites.

Each project is approached with attention to local regulations, energy codes, and zoning requirements — factors that can significantly affect the timeline and outcome of any ADU build.

Types of ADUs J. B. Cote Construction Builds

The company works with several ADU configurations, each suited to different property layouts and homeowner goals:

  1. Detached ADUs — Standalone units built separately from the main house. These offer privacy and customization but typically involve higher construction costs and more complex permitting.
  2. Attached ADUs — Units connected to the primary residence, sharing one or more walls. These tend to be more cost-effective and allow for shared utility connections.
  3. Above-Garage ADUs — Built above an existing garage, making use of vertical space while preserving the garage footprint below.
  4. Garage Conversions — Existing garage space is converted into livable area. This approach avoids new construction on the property footprint and can be a practical, lower-cost option.
  5. In-Law Suites — Designed to accommodate family members or caregivers, these units provide accessible living space within or adjacent to the main home.

Each ADU type comes with its own set of considerations. J. B. Cote Construction works with clients to identify which option best fits their property, budget, and intended use — whether that's rental income, guest accommodations, or housing for family members.

The Design-Build Process

J. B. Cote Construction follows a structured design-build process for ADU projects:

  1. Initial Site Visit and Estimate — The process begins with an on-site visit to assess the property and discuss project goals, leading to a budget estimate.
  2. Conceptual and Preliminary Design — Their design team works with the homeowner to develop plans that reflect the intended vision while meeting local code requirements.
  3. Material Selection — Clients are guided through material choices with consideration for quality, appearance, and budget.
  4. Permitting and Approval — The company manages the permitting process, including compliance with Rhode Island energy codes and local zoning laws.
  5. Construction — Project management covers all stages from foundation to finishes, with a defined timeline.
  6. Quality Control — A final walkthrough and checklist are completed before the unit is considered ready for occupancy.

Navigating zoning and permitting for ADU construction in RI and MA requires familiarity with local regulations. J. B. Cote Construction handles this aspect of the process, which can otherwise be a significant hurdle for homeowners unfamiliar with municipal requirements.

Energy efficiency is also factored into their builds. The company works to ensure that ADUs meet or exceed current energy codes, which can contribute to lower utility costs over time. Sustainable practices and modern building standards are incorporated into both detached ADU and attached unit projects.

Once construction is complete, the focus shifts to final finishes and long-term durability. J. B. Cote Construction aims to deliver spaces that are practical to maintain, using materials selected for both appearance and longevity. Their team provides guidance on upkeep to help homeowners keep their accessory dwelling unit in good condition over the years.

Services

JB Cote Construction performs the following services

  • Architecture & Design
  • Permit Specialist
  • Construction
  • Feasibility & Site Assessment
  • Finishing & Fit-out

JB Cote Construction Reviews

Matthew Brody

2026-02-20
"During the February 2026 snowstorm, we experienced ice dams that caused water intrusion into our first-floor ceiling and basement, and several restoration companies proposed extensive and very costly repairs. JB Cote took a far more thoughtful and conservative approach, opening walls and ceilings section by section to confirm the presence of damage before proceeding. The actual damage proved to be much more limited than initially suggested, and the repairs were completed at a fraction of the earlier estimates. Their crew was professional, skilled, and meticulous with daily clean-up, and management was honest, straightforward, and never upsold us. Working with them felt like having a trusted family member in the general contracting business. We plan to use them for a much more substantial construction project on our property in the near future -- an ADU. Highly recommended."

Krissie Morrissette

2026-01-11
"Cant say enough good things about JB Cote Construction!! Im a single woman who had an ADU built. During the entire process, I felt safe and confident that the owners and the whole crew had my best interest in mind. They walked me through every step of the process. The price they quoted included everything. They were kind, prompt, creative, professional, available, and did a fantastic job! So happy I found them!!!"

John Guertin

2025-07-02
"The Cote family and their crew did a great job on my mini split system and some repairs. Communication is great and they show up when promised. Neat work with no mess. The hard part of getting a mini split price is the equipment used and the routing of the lines varies significantly . I have seen installations where it looks like an octopus is on the house and there are huge coils of lines behind the condenser. Cote construction took the hard route and routed the lines inside the house out of sight wherever possible even when it was extremely challenging to do. The pictures speak for themselves. I agreed on a routing that would have been much more visible and easier and they changed it on the day of installation to be much cleaner."

sean crowley

2025-03-22
"After a long period of debating whether or not to sell my home or to renovate my existing home, I decided to stay and hire JB Cote Construction To completely renovate, my kitchen and finish a room with a half bathroom in the basement. From our first meeting, Brian was very affable and easy to work with. His Experience in this field was clear from our first discussion. The entire team from Phil, Rui, Nate, Beth, Travis and Tyler treated my time, home and most importantly my son and I with respect and honesty. As the project progressed, they were very As I made several changes and additions to what we had initially discussed. As a small business owner myself, I can often be tough to please, but they accommodated my needs perfectly. They kept me up-to-date on changes with the schedule or on product availability, and even though I added many things, it only added a few extra days to the Original schedule. Im very happy with the Completed work And I am already considering additional projects I may request their help with. I would highly recommend Brian and his team to Anyone that should need their services. Thank you all for a job well done."

keith vadnay

2024-12-09
"I have known of the Cote Construction name and reputation for many years. Having seen their rehabs and additions, first hand in many of the homes in the area that I have lived. When the time came to update and repair my own properties, J.B was my first call. Excellent prices, quick response time, and professional on every front. At the end of the day, you would never know they were working. After we purchased our new home, windows and doors were replaced before we moved in. Everyone loves the new deck we did this summer, and I already have Brian and crew working on 2 more projects for the springsummer."

Specifics

Eco-Friendly

Opening hours

Monday 7:00AM - 3:30PM
Tuesday 7:00AM - 3:30PM
Wednesday 7:00AM - 3:30PM
Thursday 7:00AM - 3:30PM
Friday 7:00AM - 3:30PM
Saturday -
Sunday -

Location

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