100-110 Sudbury St

100-110 Sudbury St is a 46-story building in Downtown Boston with 90% of its floor area within daylight reach of a facade. Residential records sit on a parcel it shares with other buildings, so its use is unverified and this screen leaves it out of the conversion counts.

MA-7 & MA-8 · Screened 2026-10-04 · Excluded: residential records on a shared parcel; building use unverified

Where 100-110 Sudbury St is

Its block in Downtown Boston, drawn from Boston's own building outlines and street centerlines.

Suitability score

0–29

30–49

50–69

70–100

Already housing, or excluded for residential records on a shared parcel
Not screened
100-110 Sudbury St

100-110 Sudbury St and the 1,000 ft of Downtown Boston around it. The streets are drawn at the width of the right-of-way they run down, sidewalks included, and named, and every building on these blocks is drawn. What is left open and stippled is neither: a surface lot, a plaza or a vacant parcel. The screened buildings are colored by the ramp above, the same one the district map uses, carry their score, and each is a link to its own page. Each casts a shadow as long as its measured height lets it, so towers stand out from the low buildings around them; the unscreened buildings have no measured height and cast none. 100-110 Sudbury St is outlined in its own score color at the outline it covers at ground level. Dashed inside it is the typical floor, the one the floor-plate figure below draws, because this building steps back as it rises. Its windowless core is hatched. The inset places it among every building the screen covers.

Typical floor plan: 90% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 89%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 1,434 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 44 ft from the nearest window. A–A is where the section beside it is cut.

Section A–A: cut across the depth of the plate, through the middle of the core. Daylight reaches 35 ft in from every facade, fading as it goes, and the hatched stripe left between the lit edges is floor that gets converted and can never be rented: 1,434 sq ft on the floor the screen scores, and 59,321 sq ft over 45 residential floors. The steps are where the building sets back as it rises. The shaded ground floor is converted like the rest and counted as no homes.

On the parcel this building shares with other buildings, Boston's assessing records list 55 homes and an apartment building of unknown size; they do not say which building holds those homes, so this site leaves it out of the conversion counts without calling it housing.

Across its 45 residential floors this building carries 59,321 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment.

Modeled conversion metrics for 100-110 Sudbury St, 2026-10-04.

Suitability scoreStrong candidate	97 / 100
Storiesfrom 547 ft aerial-survey height ÷ 12 ft floor-to-floor	46
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–29: 13,360 sq ft · Floors 30–46: 11,832 sq ft
Floor platetypical floor, from the city outlines	13,360 sq ft
Daylight efficiencyshare within 35 ft of a facade	90%
Deepest interior pointviability threshold is 80 ft	44 ft
Windowless coretypical floor; the building-wide total is in the text above	1,434 sq ft
BuiltBoston's own record of the construction year	2017
ZoningDowntown Boston	SUDBURY STREET RESTRICTED GROWTH AREA
Opportunity Zonenot in a 2018 designated tract	No

The plan: window line, shape and floor rhythm

38 ft of exterior wall for each home the screen estimates — enough for two- and three-bedroom homes across the plan.

The typical floor has 484 ft of exterior wall, and across 45 residential floors the building carries 21,169 ft of it in total, divided among the 550 homes this screen estimates.

Its plate is moderately compact at 0.72: a squarish plan, with enough perimeter for a conventional double-loaded corridor. How window line and plate shape are measured.

At the model’s 750 sq ft average, the plan works out at about 12.2 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 100-110 Sudbury St scores 97 out of 100

Daylight efficiency 99, Interior depth 90, Scale 100, Finance 100 — each out of 100, then weighted.

Score components for 100-110 Sudbury St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency90% of the floor area within 35 ft of a facade, scored from 40% up to 90%	99	45%	44.7
Interior depthdeepest interior point 44 ft from a facade, scored from 80 ft down to 40 ft	90	25%	22.6
Scale550 estimated homes, scored from 0 up to 150	100	15%	15.0
Financecompleted value covers conversion cost with 22% to spare, which tops out the component	100	15%	15.0

Most of what it earns comes from daylight efficiency, and what holds it back most is interior depth, at 90 out of 100: deepest interior point 44 ft from a facade, scored from 80 ft down to 40 ft.

Built in 2017

Boston records this building as going up in 2017, which puts it in the modern stock.

As a rule, newer systems and better structure, but usually built deep and sealed for office use, and rarely cheap enough to buy at a price that lets a conversion pencil. That is the era’s general tendency rather than a finding about this building — the model reads an outline and a height, and can see nothing inside — but it is the first thing an architect would want to know, and it colours how much confidence the 90% daylight figure above deserves.

Other buildings screened near 100-110 Sudbury St

The 4 closest the screen also covers, from 240 ft away. They are the colored outlines on the plan at the top of this page.

2 Congress St
10 stories · 48% daylit · excluded: residential records on a shared parcel
about 240 ft away
25 New Chardon St
7 stories · 78% daylit · 87 estimated homes · scores 67/100 (Worth a feasibility study)
about 570 ft away
15 New Chardon St
12 stories · 82% daylit · 154 estimated homes · scores 79/100 (Strong candidate)
about 700 ft away
14 Bowdoin St
25 stories · 75% daylit · 633 estimated homes · scores 74/100 (Strong candidate)
about 890 ft away

A screen, not a feasibility study, from outlines and heights rather than plans: the method and how to correct a figure. If you know this building’s interior, you know what this model cannot see.