1170 Market St

Where 1170 Market 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

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

The typical floor has 324 ft of exterior wall, and across 6 residential floors the building carries 1,943 ft of it in total, divided among the 40 homes this screen estimates.

Its plate is compact at 0.76: 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 6.7 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 1170 Market St scores 89 out of 100

Daylight efficiency 100, Interior depth 100, Scale 27, 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 27 out of 100: 40 estimated homes, scored from 0 up to 150.

Built in 1983

San Francisco records this building as going up in 1983, 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 37,874 sq ft of converted floor, or $15.3M in total — about $383K for each of the 40 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 40 homes is $14.6M.

What would have to be true

A $699K gap before any grant, which the modeled $2.4M closes. What would reopen it soonest: circulation efficiency 8% down.

The shortfall before any grant is $699K. Closing it from the value side means each of the 40 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 $2.4M 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 1170 Market St:

All four are sliders in the survey, where 1170 Market St re-scores against your own numbers.

How it compares in Downtown San Francisco

1170 Market St ranks 84th 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 77% of them at its deepest interior point. On size it is the 187th 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

4th of 7 in Tenderloin, 6th 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. 1170 Market St ranks 4th 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 32 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. 1170 Market St ranks 6th 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 32 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: 611 Mission St

The screened building closest to 1170 Market St in converted floor area is 611 Mission St: 36,808 sq ft over 7 stories, against 37,874 sq ft over 7 here.

The two land within a few points of each other — 89 here, 89 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 5,100 ft apart.

Would it qualify for a RESIDE Act grant?

The model awards 1170 Market St $2.4M, 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 1170 Market St

The 4 closest the screen also covers, from 120 ft away. They are the colored outlines on the plan at the top of this page.

• 2 Hyde St
  4 stories · 72% daylit · 71 estimated homes · scores 50/100 (Marginal)
  about 120 ft away
• 40 Leavenworth St
  6 stories · 100% daylit · 68 estimated homes · scores 92/100 (Strong candidate)
  about 480 ft away
• 1275 Market St
  17 stories · 69% daylit · 375 estimated homes · scores 52/100 (Worth a feasibility study)
  about 820 ft away
• 1067 Market St
  6 stories · 100% daylit · 42 estimated homes · scores 89/100 (Strong candidate)
  about 930 ft away