427 Auzerais Ave

427 Auzerais Ave is a 5-story apartment building in Downtown San Jose. Its floor plate has 86% of its area within daylight reach of a facade and scores 79 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 427 Auzerais Ave 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
427 Auzerais Ave

427 Auzerais Ave 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. 427 Auzerais Ave 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: 3,894 sq ft per floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 61 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: 3,894 sq ft on the floor the screen scores, and 15,576 sq ft over 4 residential floors. The shaded ground floor is converted like the rest and counted as no homes.

This is already an apartment building: OpenStreetMap maps it as an apartment building; San Jose's rental housing and condominium records do not list its homes yet. 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 3,894 sq ft of windowless core — area that must be gutted, seismically braced and sprinklered but can never be rented as an apartment. Across 4 residential floors that is 15,576 sq ft of cost carrying no revenue.

Modeled conversion metrics for 427 Auzerais Ave, 2026-10-20.

Suitability scoreStrong candidate	79 / 100
Storiesfrom 65 ft LiDAR height ÷ 12 ft floor-to-floor	5
Floor plateper floor, from the city footprint	28,236 sq ft
Daylight efficiencyshare within 35 ft of a facade	86%
Deepest interior pointviability threshold is 80 ft	61 ft
Windowless coreper floor — renovated but never rentable	3,894 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

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 941 ft of exterior wall, and across 4 residential floors the building carries 3,765 ft of it in total, divided among the 103 homes this screen estimates.

Its plate is elongated at 0.40: a slab or an L, which is why so much of the floor lies within reach of a window: the outline buys daylight that a square plan of the same area would not. How window line and plate shape are measured.

At the model’s 750 sq ft average, the plan works out at about 25.8 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 427 Auzerais Ave scores 79 out of 100

Daylight efficiency 92, Interior depth 48, Scale 69, Finance 100 — each out of 100, then weighted.

Score components for 427 Auzerais Ave. 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%	92	45%	41.6
Interior depthdeepest interior point 61 ft from a facade, scored from 80 ft down to 40 ft	48	25%	12.0
Scale103 estimated homes, scored from 0 up to 150	69	15%	10.3
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 interior depth, at 48 out of 100: deepest interior point 61 ft from a facade, scored from 80 ft down to 40 ft.

Other buildings screened near 427 Auzerais Ave

The 4 closest the screen also covers, from 1,130 ft away. They are the colored outlines on the plan at the top of this page.

333 W San Carlos St
16 stories · 77% daylit · 240 estimated homes · scores 68/100 (Worth a feasibility study)
about 1,130 ft away
300 Park Ave
16 stories · 78% daylit · 246 estimated homes · scores 72/100 (Strong candidate)
about 1,150 ft away
350 Barack Obama Blvd
8 stories · 65% daylit · already an apartment building
about 1,420 ft away
303 Almaden Blvd
11 stories · 59% daylit · 243 estimated homes · scores 35/100 (Marginal)
about 1,430 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.