26 N 5th St

26 N 5th St is a 7-story apartment building in Downtown San Jose. Its floor plate has 80% of its area within daylight reach of a facade and scores 74 out of 100 on this screen’s measures, which is part of why it works as housing.

CA-18 · Screened 2026-10-20 · Already housing

Where 26 N 5th 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
26 N 5th St

26 N 5th 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. 26 N 5th 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: 80% 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: 3,341 sq ft per floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 57 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: 3,341 sq ft on the floor the screen scores, and 20,044 sq ft over 6 residential floors. The shaded ground floor is converted like the rest and counted as no homes.

This is already an apartment building: San Jose's rental housing and condominium records list 120 apartments here, and OpenStreetMap maps it as an apartment building. It is on the map because downtown zoning permits offices and homes alike, but this site does not count it as a conversion candidate.

Every floor carries 3,341 sq ft of windowless core — area that must be gutted, seismically braced and sprinklered but can never be rented as an apartment. Across 6 residential floors that is 20,044 sq ft of cost carrying no revenue.

Modeled conversion metrics for 26 N 5th St, 2026-10-20.

Suitability scoreStrong candidate	74 / 100
Storiesfrom 87 ft LiDAR height ÷ 12 ft floor-to-floor	7
Floor plateper floor, from the city footprint	16,659 sq ft
Daylight efficiencyshare within 35 ft of a facade	80%
Deepest interior pointviability threshold is 80 ft	57 ft
Windowless coreper floor — renovated but never rentable	3,341 sq ft
BuiltSan Jose does not publish a construction year with this data	—
ZoningDowntown San Jose	DC
Opportunity Zonecensus tract 06085501000, 2018 designation	Yes

The plan: window line, shape and floor rhythm

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

The typical floor has 528 ft of exterior wall, and across 6 residential floors the building carries 3,170 ft of it in total, divided among the 85 homes this screen estimates.

Its plate is compact at 0.75: close to a square or a circle, the most efficient envelope an office can have and the least generous one for apartments: little perimeter to divide among homes. How window line and plate shape are measured.

At the model’s 750 sq ft average, the plan works out at about 14.2 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 26 N 5th St scores 74 out of 100

Daylight efficiency 80, Interior depth 58, Scale 57, Finance 100 — each out of 100, then weighted.

Score components for 26 N 5th St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency80% of the floor area within 35 ft of a facade, scored from 40% up to 90%	80	45%	36.0
Interior depthdeepest interior point 57 ft from a facade, scored from 80 ft down to 40 ft	58	25%	14.5
Scale85 estimated homes, scored from 0 up to 150	57	15%	8.5
Financecompleted value covers conversion cost with 2% 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 57 out of 100: 85 estimated homes, scored from 0 up to 150.

Other buildings screened near 26 N 5th St

The 4 closest the screen also covers, from 150 ft away. They are the colored outlines on the plan at the top of this page.

227 E Santa Clara St
8 stories · 98% daylit · already an apartment building
about 150 ft away
181 E Santa Clara St
28 stories · 78% daylit · already an apartment building
about 260 ft away
50 N 4th St
4 stories · 56% daylit · 89 estimated homes · scores 31/100 (Marginal)
about 340 ft away
28 N 4th St
28 stories · 79% daylit · already an apartment building
about 380 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.