104 S Market St

104 S Market St is a 3-story building in Downtown San Jose with 86% of its floor area within daylight reach of a facade. This screen estimates 47 homes and scores it 76 out of 100 for office-to-residential conversion suitability.

CA-18 · Screened 2026-10-20 · Strong candidate

Also addressed as 110 S Market St and 62 W San Fernando St: San Jose’s address records place all 3 on this one footprint.

Where 104 S Market St is

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

Suitability score

0–29

30–49

50–69

70–100

Already housing
Not screened
104 S Market St

104 S Market St and the 1,000 ft of Downtown San Jose 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. 104 S Market St is outlined in its own score color at the outline it covers at ground level. Its windowless core is hatched. The inset places it among every building the screen covers.

Floor plan: 86% of each floor sits within daylight reach of a facade. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 3,703 sq ft per floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 55 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: 3,703 sq ft on the floor the screen scores, and 7,406 sq ft over 2 residential floors. The shaded ground floor is converted like the rest and counted as no homes.

OpenStreetMap maps it as a museum. Downtown zoning permits it alongside offices, which is why it is on the map, but it is not office space, so this site does not count it as a conversion candidate.

Every floor carries 3,703 sq ft of windowless core — area that must be gutted, seismically braced and sprinklered but can never be rented as an apartment. Across 2 residential floors that is 7,406 sq ft of cost carrying no revenue.

Modeled conversion metrics for 104 S Market St, 2026-10-20.

Suitability scoreStrong candidate	76 / 100
Storiesfrom OpenStreetMap, “San José Museum of Art, way 25967161”, in place of the 91 ft LiDAR height ÷ 12 ft floor-to-floor	3
Floor plateper floor, from the city footprint	25,749 sq ft
Daylight efficiencyshare within 35 ft of a facade	86%
Deepest interior pointviability threshold is 80 ft	55 ft
Windowless coreper floor — renovated but never rentable	3,703 sq ft
BuiltSan Jose does not publish a construction year with this data	—
ZoningDowntown San Jose	DC
Opportunity Zonecensus tract 06085500800, 2018 designation	Yes

The plan: window line, shape and floor rhythm

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

The typical floor has 823 ft of exterior wall, and across 2 residential floors the building carries 1,646 ft of it in total, divided among the 47 homes this screen estimates.

Its plate is moderately compact at 0.48: 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 23.5 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 104 S Market St scores 76 out of 100

Daylight efficiency 91, Interior depth 63, Scale 31, Finance 100 — each out of 100, then weighted.

Score components for 104 S Market St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency86% of the floor area within 35 ft of a facade, scored from 40% up to 90%	91	45%	41.1
Interior depthdeepest interior point 55 ft from a facade, scored from 80 ft down to 40 ft	63	25%	15.6
Scale47 estimated homes, scored from 0 up to 150	31	15%	4.7
Financecompleted value covers conversion cost with 9% 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 scale, at 31 out of 100: 47 estimated homes, scored from 0 up to 150.

Other buildings screened near 104 S Market St

The 4 closest the screen also covers, from 190 ft away. They are the colored outlines on the plan at the top of this page.

90 S Market St
6 stories · 94% daylit · 86 estimated homes · scores 87/100 (Strong candidate)
about 190 ft away
50 W San Fernando St
17 stories · 70% daylit · 279 estimated homes · scores 55/100 (Worth a feasibility study)
about 230 ft away
121 S Market St
9 stories · 89% daylit · 84 estimated homes · scores 84/100 (Strong candidate)
about 340 ft away
170 S Market St
22 stories · 43% daylit · 881 estimated homes · scores 20/100 (Unlikely)
about 370 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.