Abacus

Abacus Builders & General Contractors works out of 190 Old Colony Ave in South Boston, and its recent jobs show the range: a stair repair on a set of exterior egress stairs one month, a roof deck build the next. Mark Little started the company in 2006 and moved it into that South Boston office in 2014, building it into a general contractor for additions, gut renovations, decks, and exterior work across Boston, Cambridge, Somerville, Newton, and Wellesley. The past six months track the company's longer pattern: reviewers point to clear, responsive communication as much as the finished product. One homeowner had an issue come up mid-project on a stair repair and said the crew came back and fixed it efficiently; another's roof deck build drew praise for craftsmanship and flexibility, with project lead Gerald and estimator Lua both called out by name. A bathroom remodel from January describes a courteous, professional crew with steady updates throughout. That lines up with the deeper record — 66 reviews dating back to 2023 across seven platforms, the large majority five stars, backed by an active Massachusetts HIC license and a Better Business Bureau A+ grade. The longer history also points to comfort with bigger, multi-trade work — home additions and condo-scale construction — beyond the smaller repairs and remodels reviewers describe most recently. Abacus shows up locally too: in May it sent a truck and two crew members to help the West Broadway Neighborhood Association spread mulch during a city cleanup day. One thing worth a quick check: Abacus carries that BBB A+ grade but isn't a BBB-accredited business, meaning it hasn't gone through that voluntary vetting process — worth asking about if accreditation specifically matters to you. Outside of that, nothing in the record surfaces a documented complaint or workmanship dispute to weigh against the praise. For a homeowner planning something bigger than a single repair — an addition, a full gut renovation, multi-trade exterior work — this looks like a contractor built for that scale and used to running it end to end. Get a written scope and confirm current license status before signing, as with any contractor, but the track record here is deep and consistently positive.