Alcantara Construction is an experienced ADU contractor specializing in detached ADUs, garage conversions, JADUs, in-law suites, and granny flats. They guide homeowners through planning, permitting, and building accessory dwelling units efficiently.

Alcantara Construction – ADU Contractor in Medford, MA

About Alcantara Construction

Alcantara Construction is a construction company offering a range of building and renovation services. As an ADU contractor, they work with homeowners looking to add value to their properties through thoughtful construction projects, including accessory dwelling unit builds and related work.

ADU and Dwelling Unit Services

Alcantara Construction operates as an ADU builder, helping clients navigate the process of adding additional living spaces to their existing properties. Whether a homeowner is considering a detached ADU, a garage conversion, or an in-law suite, the company brings construction experience to each project. These types of projects require careful planning, permitting knowledge, and skilled execution — areas where a dedicated accessory dwelling unit builder can make a meaningful difference.

For those interested in smaller secondary units, Alcantara Construction also works on JADU (Junior Accessory Dwelling Unit) projects, which are typically conversions of existing interior space within a primary residence. This can be a practical option for homeowners who want to add a rentable or livable unit without a full detached build.

Construction Expertise and Project Scope

Beyond ADU-specific work, Alcantara Construction handles broader construction and remodeling projects. Their experience spans residential construction, giving them a well-rounded understanding of what it takes to complete a project from start to finish. This includes working through local building codes, coordinating with inspectors, and managing the various trades involved in a construction project.

As a granny flat builder and backyard cottage builder, they understand that these projects are often personal — homeowners may be building for aging family members, rental income, or simply to make better use of their property. Alcantara Construction approaches each project with that context in mind.

  1. Detached ADU construction
  2. Garage conversion to living space
  3. Junior ADU (JADU) builds
  4. In-law suite construction
  5. General residential construction and remodeling

Working with Alcantara Construction

Alcantara Construction serves homeowners who are looking for a reliable ADU contractor to guide them through what can be a complex building process. From initial planning through to project completion, they aim to keep the work on track and within the agreed scope. For homeowners considering adding a Casita or secondary unit to their property, Alcantara Construction represents a practical option worth exploring.

Alcantara Construction Reviews

Rabbi Beker

2026-05-25
"We had an extremely positive experience with Alcantara Contractors. A large part of our basement had remained unfinished for years, and now it is completely transformed into a beautiful and usable space that we are very happy with. The team was professional and polite, stuck to the budget, and didnt pressure us to add things at a higher cost. They paid great attention to detail, and took care of things that I didnt even notice. They finished the work earlier than I expected, and cleaned up after themselves perfectly. Highly recommended!"

Charles Aznavoorian

2026-04-29
"Carlos and his team promptly delivered a detailed scope of work with a reasonable quote. Within days of approval, work began and was completed in just a couple of days. The workmanship was outstanding, the job site was kept clean, and Carlos provided daily progress updates. When the garage doors needed a post-completion adjustment, I notified Carlos and he came out quickly to resolve the issue. What sets Carlos's team apart: 1. Fast response he returns calls quickly 2. Quick, fair quotes reasonably priced every time 3. Rapid start work begins within a day or two of the go-ahead 4. Excellent execution completed quickly with top-quality workmanship I'll definitely be calling Carlos and his crew for future projects."

Bob Colantoni

2026-02-24
"During our recent blizzard it became clear to me that my wife and I had hours of back breaking work ahead to dig us out! We were not looking forward to it! Then I contacted alcantara for assistance. Carlos immediately got back to me with pricing and timeframe of when his team could be there. They were awesome to deal with! Dug as out, cleared off our cars, porches, driveway and steps. We didnt have to do a thing! Remember to contact Alcantara for any needs you may have renovations, construction, snow removal, etc. Alcantara is the best!!"

Laura Glazer

2025-11-24
"We used Alcantara to build a dormer the length of our second floor so we could add a bedroom for our kids. The project took about 6 months. Carlos and Odair were both really great to work with very friendly and communicative. The rest of the staff they employed was top notch as well they were friendly and kind and, crucially, fantastic workers. Everyone was very respectful of our property and house they were careful to not damage anything and cleaned up after themselves at every stage of the project. The work that the team did was really well done. They didnt cut any corners and we felt good about the construction. The end result was great the new space was exactly what our family needed and my kids are loving having their own rooms! Carlos and Odair made sure we were happy with everything before wrapping the project up and tied up all the loose ends we had. While the project took longer than we'd hoped we were told 3-6 months for the project and it was pushing 6 months at the end and there were many days they didn't come by due to other projects they were working on, we were thrilled with the end results. We'd absolutely use Alcantara again."

Michelle Lee

2024-11-04
"Carlos and his team along with his subs did an amazing job in my North Andover home. They converted an extra living room into a bedroom, bathroom, and office with laundry. The project took 3 months to complete, and they worked very hard and diligently. Maciel, Alex, Josimar and others electricians, painters, tile installer, even office folks were extremely personable and patient with me and it really made my first renovation an enjoyable experience. Carlos and his team also helped me promptly with other issues I had in my home, all of which were executed extremely well: - a leak in the basement plumbing and replacing sheetrock with drop ceiling tiles. - removing subfloor, retiling and replacing toilet and vanity in second floor bathroom - Resizing kitchen cabinets to allow up to code installation of new stove I will continue to use Alcantara as my go to contractor and I highly recommend him to others. PS they are extremely busy, so being flexible goes a long way."

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Opening hours

Monday 8:00AM - 5:00PM
Tuesday 8:00AM - 5:00PM
Wednesday 8:00AM - 5:00PM
Thursday 8:00AM - 5:00PM
Friday 8:00AM - 5:00PM
Saturday -
Sunday -

Location

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