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Luxury interior design in South Boston

South Boston is Boston's triple-decker wood-frame multifamily (1880-1925) submarket. Triple-decker construction in South Boston peaked between 1890 and 1920 — the typical 24-by-40-foot footprint sits on a 50-by-100-foot lot with three identical stacked apartments, and the 8-foot-wide bay window is structural rather than ornamental, carrying a portion of the floor-joist span above.

South Boston cost range
$175K$825K
typical mid-complexity
Permit authority
Boston ISD
8-14 weeks (ISD long-form permit; no district commission review)
Typical home size
1,000-1,800 sqft per triple-decker floor; 2,200-3,800 sqft single-family
Borough · ZIP
Boston
02127
MGL Ch. 111 §197A delead on triple-decker stock (~85% pre-1978)780 CMR §722 fire-rated wall assemblies between triple-decker floors780 CMR §901 sprinkler-required on triple-decker conversions adding a fourth unitMGL Ch. 40A §6 nonconforming-structure rules on most pre-existing setbacks

What a luxury interior design project looks like here

Triple-decker construction in South Boston peaked between 1890 and 1920 — the typical 24-by-40-foot footprint sits on a 50-by-100-foot lot with three identical stacked apartments, and the 8-foot-wide bay window is structural rather than ornamental, carrying a portion of the floor-joist span above.

Because South Boston's triple-deckers use 2x10 nominal floor joists at 16-inch on-center spacing across a 24-foot span, modern open-plan kitchens that remove a load-bearing partition almost always require a flush-framed LVL or steel-flitch beam — typical retrofit cost is $8K-$22K including engineering letter to ISD.

South Boston is one of the few Boston neighborhoods without a BLC overlay or architectural commission, so kitchen and bathroom gut renovations move through ISD on a baseline 8-14 week timeline rather than the 12-22 weeks typical of Back Bay or the South End.

High-end finishes, white-glove procurement, custom artisan millwork for pre-war row houses, brownstone penthouses, and Brattle Street single-family stock. In South Boston specifically, triple-decker wood-frame multifamily (1880-1925) stock means luxury interior design scope is shaped by the neighborhood's dominant construction typology. Baily's Boston scoping flow factors mgl ch. 111 §197a delead on triple-decker stock (~85% pre-1978) and 780 cmr §722 fire-rated wall assemblies between triple-decker floors into the estimate before a contractor is involved.

Start your South Boston scope — Baily asks the right questions.

Pre-seeded for luxury interior design in South Boston. Mention your 1,000-1,800 sqft per triple-decker floor, your timeline, and any known constraints — Baily factors the boston isd review queue into the scope.

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Origin

Who is Baily?

Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon’s rim.

He wasn’t the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily’s contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily’s beads.

That’s what we wanted our AI to do. Every inbound call and text has signal in it — a homeowner’s real question, a timeline, a budget, a hesitation that means “yes but.” Baily listens to every one, 24/7, and finds the beads of light.

Baily was a businessman before he was a scientist. That’s our vibe too.

Questions LA homeowners actually ask

Nearest neighborhoods

Same service, adjacent Boston submarkets.

Other projects we scope in South Boston

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