Evan and the Abacus team did a great job on my project. They were proactive, detail-oriented, and very responsive to any questions/requests that I had. I also thought that the pricing was fair, and they were very up front about the costs. I will certainly work with them in the future for any contracting work.


I had a great experience working with Abacus Builders. They built me a beautiful roof deck (including roof access and stairs) in South Boston which is an intense project so I was very grateful to be working with experienced and professional contractors. Mark and his team were extremely thorough, paid close attention to detail and enjoyable to work with. They are not only skilled but they are also very good to their customers so my experience was completely stress free and they made sure everything was absolutely perfect for me before they closed the job. I will use them going forward for all of my contracting needs! I have already referred them to friends and would highly recommend working with them.

- Ali Dudley

Mark and crew installed our roof deck. The deck is beautiful, see the St Mary’s deck on his web site. His crew did a great job and installed the deck quickly. Mark is super responsive to email and phone calls. He also worked with us to redesign the door to the deck before construction began, giving us several options to consider.

If you’re considering a roof deck and can’t easily get ideas and information, like happened to me, Mark is a great resource.
I highly recommend them.

- Susan Paradiso

Abacus was awesome – they did a big renovation for us (kitchen, bathroom, new flooring, etc.) in the exact amount of time that they said they’d do it while also producing extremely high quality work. Sean and Mark were a pleasure to work with – they were extremely responsive and professional. I really enjoyed working with them and highly recommend them.

- A.J.D.

I inquired to see if they could swing by and give me a quote for a very large scoped project. He indicated that they were already booked up solid, but did recommend me to call a colleague. I’m happy to see professionals recommend other professionals.

- Mac Chinsomboon

The company was very easy to work with. I was able to speak with the owner regularly. Everyone was helpful and supportive and they were very professional. It was an overall positive experience.

- Kyle Vonruden

Mark was great from beginning to end. Very professional, right on budget and didn’t even take payment until after the project was done

- Jeffrey Lee

Recently purchased the top floor unit on a condoized 3 family in Southie. The builder wanted to build a roof deck but did not get permits in time for sale. Originally wanted simple spiral staircase on back deck going up to roof, but was denied at ISD. Resubmitted with stairs going up back staircase to roof with a roof hatch, was approved.

Had about 10 contractors come out, most not interested in the job. Ended up with 3 usable bids and chose Abacus. Mark Little is very friendly and will explain everything in detail, if you ask.

Built the roof-deck such that its not sitting on the roof, but floating off the roof and resting on metal railings that attach at 4 distinct points. Pointed out roof work that needed to be done due to sloppy installation of siding on house. Negotiated a price directly with his roofer and paid him separately.

Now that deck is done, inspected and Mark’s been paid, he is continuing to help me with minor items relating to the deck.

- Joe Gugliotta

I am a trustee of a 7 unit, self managed condominium in South Boston. Because it was constructed in 1986, repairs and improvements have been necessitated by the passage of time. I had used other contractors in the past. Since I found Abacus Builders, I always turn to them. They are simply the best by any measure.

- Thomas Finnerty

Mark and the Abacus team are some of the best contractors I’ve worked with. They put in a 600 square foot roof deck for us on time and mostly on budget (other than special requests we made for materials). They’re efficient, timely, and communicative. I highly recommend Abacus for indoor or outdoor projects. Top notch all around.

- Drew McGillivary

Mark – I was very pleased with the work that you did for us, especially the tiling. You’ve got a great crew working for you, I really enjoyed them. I’m sure it wasn’t always easy coordinating the different aspects of this job but everything came out the way we hoped.

Thanks again.

- Maury Hall