6S Design + Build Inc.

6S Design + Build is a Newton-based design-build general contractor co-founded by Lidia Ferraz, Clayton Ferraz, and Tony King, offering new construction, additions, kitchen, bathroom and basement remodeling, and exterior work like roofing, siding and gutters across the Greater Boston area, including Southborough, Brookline, Chelsea and Cambridge, according to the company's own site. The written history is short but detailed. One client, in a July 2026 review, said Clayton Ferraz has handled construction work for them for nine years, praising his carpentry and painting and calling him easy to reach throughout a project. Another described watching Tony and Clay build a new 6-unit property across the street over roughly three years from first neighborhood meeting to completion — the kind of multi-year, ground-up project that speaks to the company's range. A third reviewer, on BuildZoom, called the team's communication better than any contractor they'd worked with before. Its Massachusetts home improvement contractor registration (#211350) is active and verified against the state registry. There isn't much written track record to go on yet — just three reviews from the past two years — so it's worth asking for a few recent references directly, especially for a project of any real size. For a homeowner planning a substantial remodel or new build in the Greater Boston area, the early signs — a long-standing personal relationship with one client, a completed multi-unit development, and consistently praised communication — are a reasonable starting point, backed up with a direct conversation about recent work.