Abacus builders

Abacus builders Abacus Builders & General Contractors is a Ground Up Development Specialist firm. We specialize in multi-family home building and general contracting.

Mark Little started the company in 2006 and grew it through his strong community roots, building a solid reputation one customer at a time. The Abacus Builders office opened at 190 Old Colony Ave in 2014 allowing us to get to know our customers better through in-person meetings, ensuring a superior service that is exactly what each customer wants. Our mission at Abacus Builders is to provide excep

tional construction services to our customers. To continue expanding our company, giving our employee’s the opportunity to advance and grow. And, to remain a community-minded company and an asset to our local area through our continued work with neighborhood groups and organizations such as ONEin3, Harvest of Hope and the Notre Dame Education Center.
ABACUS BUILDERS & GENERAL CONTRACTORS is a Ground Up Development Specialists firm. We specialize in multi family home building, general contracting and fine carpentry in the greater Boston area. Our reputation is built on providing our clients with the highest quality of work at a reasonable price. Our combination of construction expertise and commitment to excellence is unmatched within our service area. Services provided by Abacus Construction include:

~Ground Up New Construction.

~Full Gut Renovations

~Fire Damage Restoration

~Property Acquisitions

~Full Service General Contracting

~Full Exterior Envelope Construction

~Project Management

~Planning and Permitting

~Property Management

~Architectural Design

~Engineering

~Roof Deck Specialists

~Landscaping

Most renovations don't fail because the design was wrong. They fail because the design and the budget never had an hones...
06/23/2026

Most renovations don't fail because the design was wrong. They fail because the design and the budget never had an honest conversation.

A current Boston new construction project came to us with strong architectural plans and a homeowner who knew what she wanted. The early estimate came in over budget. The temptation in that moment is to either cut the scope or push the homeowner to spend more.

We did neither. We sat with the architect, walked the plans line by line, and identified specific changes that preserved every signature design element while bringing the cost into the homeowner's actual budget. Different finish materials in non-visible areas. Smarter structural sequencing. A few mechanical decisions that saved real money without affecting what the homeowner will see and feel for the next 30 years.
The project locked in. This is the result.

If your renovation budget and your design feel like they're at war, the answer usually isn't to abandon either one. It's to find someone willing to do the hard conversation.

Window install day at 28 Clifton Street.The windows go in once the framing and weather barrier are right. There's no rus...
06/22/2026

Window install day at 28 Clifton Street.

The windows go in once the framing and weather barrier are right. There's no rushing this step. Get it wrong and the building leaks for fifty years.

We love this new project in Roxbury. Follow along for the full reveal!

PROJECT COMPLETE157 O Street, South Boston. Done.A 1900s single-family row house, fully reimagined into a modern family ...
06/18/2026

PROJECT COMPLETE

157 O Street, South Boston. Done.

A 1900s single-family row house, fully reimagined into a modern family home. Down to the studs and back up, with a rear addition, rear decks, a roof deck, and a private backyard.

Inside: radiant heated floors throughout, an open kitchen and dining built for how families actually live, custom designer closets in every bedroom, and a finish package that lands every detail.

Architect: Derek Rubinoff. Interior design: Stanton Schwartz Design Group. A short walk to M Street Beach.

A year of work. The result speaks for itself.




Five things every Boston homebuyer should check on a 100+ year old home.Most buyers focus on the kitchen and the bath. B...
06/17/2026

Five things every Boston homebuyer should check on a 100+ year old home.

Most buyers focus on the kitchen and the bath. Both are replaceable. What's not replaceable, or what's expensive enough that it should change your offer: knob-and-tube wiring, asbestos in the plaster, water in the basement, chimney pointing, and the original mechanicals.

A typical Boston row house with two or three of these issues unaddressed can carry $50,000 to $150,000 in deferred work the seller didn't disclose. This is worth knowing before the offer goes in, not after.

Save this. Send it to anyone shopping a Boston brownstone, row house, or triple-decker.

If you want a contractor walk-through before you make an offer, link in bio.

Harvard Street, Charlestown. A custom roof deck with views of the Zakim Bridge and downtown.The architect wanted a sleek...
06/16/2026

Harvard Street, Charlestown. A custom roof deck with views of the Zakim Bridge and downtown.

The architect wanted a sleek access solution that didn't eat into the interior square footage. The answer: a spiral staircase from the floor below, topped by a double dome bubble hatch. Compact, modern, and one of the more distinctive roof deck accesses we've built.

A note for anyone planning a Boston roof deck. Before you spend a dollar on the deck itself, look at the rubber roof underneath. EPDM lasts 20 to 25 years. If yours is past the halfway point, replace it before the deck goes on. We did exactly that on this
project, and on the neighboring building's roof too. Our roof and deck warranties pair, so the whole envelope is covered.

06/15/2026

Watch a corner of Roxbury change.

Drone footage of 28 Clifton Street as it was, dissolving into what it's become. Four ground-up condos, exterior finished, interiors coming.

This is what neighborhood change looks like, building by building. The block doesn't stay the same. We get to be part of how it shifts.

Full project reveal coming soon.

We love exploring how different regions tackle historical preservation, and this coastal city is an absolute architectur...
06/12/2026

We love exploring how different regions tackle historical preservation, and this coastal city is an absolute architectural masterpiece. Can you guess where we are?

Here are your hints:

This city was added to the UNESCO World Heritage list in 2021 as the "winter resort town of the Riviera".

The historic center, also known as the "Old" town, is a labyrinth of narrow streets featuring pastel and ochre facades that reflect a strong Italian Baroque influence .

It experienced a massive construction boom in the late 19th and early 20th centuries, resulting in incredible Belle Époque palaces and villas.

It is home to the iconic Hotel Le Negresco, famous for its magnificent pink dome.

Drop your best guess in the comments below! 👇

The siding is the building. Everything else is style. The siding is what keeps the building dry, fireproof, and looking ...
06/10/2026

The siding is the building. Everything else is style. The siding is what keeps the building dry, fireproof, and looking right 30 years from now.

James Hardie is the #1 brand of siding in North America, on more than 10 million homes. 30-year non-prorated product warranty. ColorPlus Technology finishes carry a 15-year warranty against peeling, cracking, and chipping.

Non-combustible. Won't rot. Won't host pests. Holds its color through Boston's freeze-thaw cycles in a way wood and vinyl can't match.

Why we keep speccing it: it outlasts every other siding option, the install hardware is consistent, and homeowners get insurance discounts for choosing it on some policies.

Most Boston homeowners ask the wrong question about roof decks.They ask "how much per square foot." The answer is meanin...
06/09/2026

Most Boston homeowners ask the wrong question about roof decks.

They ask "how much per square foot." The answer is meaningless without knowing what's underneath, how you get up there, what material you're using, and whether the city is going to make you go to ZBA.

The honest range for a Boston roof deck is $40,000 on the low end to $250,000+ on the high end. Most projects land between $60K and $150K. Where you fall depends on five specific things, broken down in the carousel.

Season just started. If you're planning a deck for this summer, you're already late on permits. If you're planning for next summer, now is the right time.

Save this. Send it to anyone you know who's been thinking about it. And contact us with any questions or to get your estimate.

We are so excited to share the incredible before and after of 157 O Street!Same lot. Same address. Same neighborhood.157...
06/08/2026

We are so excited to share the incredible before and after of 157 O Street!

Same lot. Same address. Same neighborhood.

157 O Street started life in the 1900s as a single-family row house. After a ZBA-approved expansion and a 12-month build, it's the modern home you see in the photo.

Designed by Derek Rubinoff. Interior selections by Stanton Schwartz Design Group. Radiant heated floors throughout, custom designer closets, rear addition, roof deck, backyard.

Be sure to follow along for the full reveal!




Address

190 Old Colony Avenue
Boston, MA
02127

Opening Hours

Monday 7am - 5pm
Tuesday 7am - 5pm
Wednesday 7am - 5pm
Thursday 7am - 5pm
Friday 7am - 5pm

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