25 Cyril Magnin St

Where 25 Cyril Magnin St is

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

The plan: window line, shape and floor rhythm

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

The typical floor has 411 ft of exterior wall, and across 7 residential floors the building carries 2,875 ft of it in total, divided among the 66 homes this screen estimates.

Its plate is moderately compact at 0.66: 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 9.4 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 25 Cyril Magnin St scores 92 out of 100

Daylight efficiency 100, Interior depth 100, Scale 44, Finance 100 — each out of 100, then weighted.

Most of what it earns comes from daylight efficiency, and what holds it back most is scale, at 44 out of 100: 66 estimated homes, scored from 0 up to 150.

Built in 1973

San Francisco records this building as going up in 1973, which puts it in the late-modern stock.

As a rule, typically the hardest to convert: the deepest plates of any era, large central cores, and floor-to-floor heights tight enough that running residential drainage under a ceiling can be the thing that ends a project. 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 100% daylight figure above deserves.

What the conversion would cost

$405 per square foot all-in across 62,455 sq ft of converted floor, or $25.3M in total — about $383K for each of the 66 homes.

That cost is charged across every converted square foot, including the circulation and service area that earns nothing directly. Against it the model sets a completed value of $366K a home, which for 66 homes is $24.2M.

What would have to be true

A $1.1M gap before any grant, which the modeled $4.0M closes. What would reopen it soonest: circulation efficiency 10% down.

The shortfall before any grant is $1.1M. Closing it from the value side means each of the 66 homes finishing at $383K rather than the $366K the model assumes — 5% more. Closing it from the cost side means getting all-in cost down from $405 to $387 per square foot.

A modeled RESIDE grant of $4.0M moves that threshold to $323K a home. That is below the assumed value, which is why this building counts as unlocked by the grant — subject to it qualifying under the law's vacant-and-abandoned test, which this data cannot show.

Each of these, moved on its own, would be enough to undo that for 25 Cyril Magnin St:

All four are sliders in the survey, where 25 Cyril Magnin St re-scores against your own numbers.

How it compares in Downtown San Francisco

25 Cyril Magnin St ranks 53rd of the 205 buildings screened here, against a median score of 87.

Its floor plate is better lit than 100% of them, and shallower than 80% of them at its deepest interior point. On size it is the 156th largest by estimated homes. The full survey of all 205 buildings ranks and maps every one of them, and the list by address links each to its own page.

Within Tenderloin and the C-3-G zone

2nd of 7 in Tenderloin, 2nd of 22 zoned C-3-G — the comparison that shares its rules, rents and streets.

San Francisco places 7 of the screened buildings in Tenderloin. 25 Cyril Magnin St ranks 2nd of them against a median score of 89. 4 score 70 or more, their median deepest interior point is 34 ft from a facade against this building’s 31 ft, and together they would hold an estimated 499 homes. The group’s top scorer is 40 Leavenworth St, at 92.

22 of the screened buildings are zoned C-3-G. 25 Cyril Magnin St ranks 2nd of them against a median score of 76. 13 score 70 or more, their median deepest interior point is 51 ft from a facade against this building’s 31 ft, and together they would hold an estimated 2,588 homes. The group’s top scorer is 40 Leavenworth St, at 92.

Its nearest match in size: 519 Powell St

The screened building closest to 25 Cyril Magnin St in converted floor area is 519 Powell St: 60,328 sq ft over 9 stories, against 62,455 sq ft over 8 here.

The two land within a few points of each other — 92 here, 91 there — so at this size the screen reads them as much the same prospect. On the money they sit in the same place: each pencils only with the modeled RESIDE grant. The two stand about 1,900 ft apart.

Would it qualify for a RESIDE Act grant?

The model awards 25 Cyril Magnin St $4.0M, on the assumption it qualifies. Whether it does, no published dataset can say.

That figure assumes the building meets the Act’s vacant-and-abandoned test, which turns on code-enforcement and receivership records no city publishes.

It does not sit in a 2018 designated Opportunity Zone, so it would not draw that Section 201 priority.

Other buildings screened near 25 Cyril Magnin St

The 4 closest the screen also covers, from 320 ft away. They are the colored outlines on the plan at the top of this page.

• 901 Market St
  5 stories · 64% daylit · 83 estimated homes · scores 35/100 (Marginal)
  about 320 ft away
• 870 Market St
  12 stories · 100% daylit · 324 estimated homes · scores 100/100 (Strong candidate)
  about 520 ft away
• 979 Market St
  6 stories · 82% daylit · 75 estimated homes · scores 75/100 (Strong candidate)
  about 710 ft away
• 42 Golden Gate Ave
  7 stories · 72% daylit · 118 estimated homes · scores 61/100 (Worth a feasibility study)
  about 890 ft away