725 Market St
725 Market St is a 6-story building in Downtown San Francisco with 94% of its floor area within daylight reach of a facade. This screen estimates 75 homes and scores it 90 out of 100 for office-to-residential conversion suitability.
CA-11 · Screened 2026-10-12 · Strong candidate
Also addressed as 731 Market St and 250 Stevenson St: San Francisco’s address records place all 3 on this one footprint.
Where 725 Market St is
Its block in Downtown San Francisco, drawn from San Francisco's own building outlines and street centerlines.
- Already housing
- Not screened
- 725 Market St
This building does not pencil on its own, but a modeled RESIDE Act grant would close the gap if the building qualified for one.
Every floor carries 873 sq ft of windowless core — area that must be gutted, seismically braced and sprinklered but can never be rented as an apartment. Across 5 residential floors that is 4,366 sq ft of cost carrying no revenue.
Modeled conversion metrics for 725 Market St, 2026-10-12.
| Suitability scoreStrong candidate | 90 / 100 |
|---|---|
| Storiesfrom 86 ft LiDAR (2010) height ÷ 12 ft floor-to-floor | 6 |
| Floor plateper floor, from the city footprint | 14,978 sq ft |
| Daylight efficiencyshare within 35 ft of a facade | 94% |
| Deepest interior pointviability threshold is 80 ft | 44 ft |
| Windowless coreper floor — renovated but never rentable | 873 sq ft |
| Estimated homesat 750 sq ft average | 75 |
| Conversion cost$405/sq ft all-in on 74,888 sq ft | $30.3M |
| Gap before grantshortfall against completed value | $2.9M |
| Modeled RESIDE grantbelow the statutory cap | $4.5M |
| BuiltSan Francisco's own record of the construction year | 1908 |
| ZoningFinancial District/South Beach | C-3-R |
| Opportunity Zonenot in a 2018 designated tract | No |
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 551 ft of exterior wall, and across 5 residential floors the building carries 2,753 ft of it in total, divided among the 75 homes this screen estimates.
Its plate is moderately compact at 0.62: 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 15.0 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.
Why 725 Market St scores 90 out of 100
Daylight efficiency 100, Interior depth 91, Scale 50, Finance 100 — each out of 100, then weighted.
Score components for 725 Market St. Points are the subscore times its weight.
| Component | Subscore | Weight | Points |
|---|---|---|---|
| Daylight efficiency94% of the floor area within 35 ft of a facade, scored from 40% up to 90% | 100 | 45% | 45.0 |
| Interior depthdeepest interior point 44 ft from a facade, scored from 80 ft down to 40 ft | 91 | 25% | 22.6 |
| Scale75 estimated homes, scored from 0 up to 150 | 50 | 15% | 7.5 |
| Financecompleted value covers conversion cost with 5% 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 50 out of 100: 75 estimated homes, scored from 0 up to 150.
Built in 1908
San Francisco records this building as going up in 1908, which puts it in the pre-1920 stock.
As a rule, the era that converts most readily: load-bearing masonry, small floor plates laid out before deep-plan offices were possible, operable windows and generous floor-to-floor heights. The usual obstacles are not daylight but hazardous materials, lifts and bringing structure up to current code. 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 94% daylight figure above deserves.
What the conversion would cost
$405 per square foot all-in across 74,888 sq ft of converted floor, or $30.3M in total — about $404K for each of the 75 homes.
All-in cost per square foot for 725 Market St: base cost plus the code work a change of use triggers.
| Base conversion cost | $260/sq ft |
|---|---|
| Seismic retrofit (change of use) | $45/sq ft |
| Plumbing risers to every unit | $40/sq ft |
| Operable windows and glazing | $30/sq ft |
| Additional egress stair | $18/sq ft |
| Fire sprinklers (NFPA 13R) | $12/sq ft |
| All-in | $405/sq ft |
That cost is charged across every converted square foot, including the 4,366 sq ft of windowless core, which has to be gutted, seismically braced and sprinklered like the rest of the building and then earns nothing. Against it the model sets a completed value of $366K a home, which for 75 homes is $27.4M.
What would have to be true
A $2.9M gap before any grant, which the modeled $4.5M closes. What would reopen it soonest: circulation efficiency 4% down.
The shortfall before any grant is $2.9M. Closing it from the value side means each of the 75 homes finishing at $404K rather than the $366K the model assumes — 10% more. Closing it from the cost side means getting all-in cost down from $405 to $367 per square foot.
A modeled RESIDE grant of $4.5M moves that threshold to $344K 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 725 Market St:
Single-assumption flip points for 725 Market St, each holding the other three at their defaults.
| Circulation efficiencythe binding constraint — the least this building would need | 4% downto 77% |
|---|---|
| Average unit size | 4% upto 784 sq ft |
| Completed value per home | 6% downto $344K |
| Conversion cost per square foot | 8% upto $282/sq ft |
All four are sliders in the survey, where 725 Market St re-scores against your own numbers.
How it compares in Downtown San Francisco
725 Market St ranks 70th of the 205 buildings screened here, against a median score of 87.
Its floor plate is better lit than 60% of them, and shallower than 56% of them at its deepest interior point. On size it is the 141st 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 Financial District/South Beach and the C-3-R zone
58th of 165 in Financial District/South Beach, 11th of 25 zoned C-3-R — the comparison that shares its rules, rents and streets.
San Francisco places 165 of the screened buildings in Financial District/South Beach. 725 Market St ranks 58th of them against a median score of 88. 121 score 70 or more, their median deepest interior point is 47 ft from a facade against this building’s 44 ft, and together they would hold an estimated 40,456 homes. The group’s top scorer is 870 Market St, at 100.
25 of the screened buildings are zoned C-3-R. 725 Market St ranks 11th of them against a median score of 90. 21 score 70 or more, their median deepest interior point is 32 ft from a facade against this building’s 44 ft, and together they would hold an estimated 2,773 homes. The group’s top scorer is 870 Market St, at 100.
Its nearest match in size: 401 Kearny St
The screened building closest to 725 Market St in converted floor area is 401 Kearny St: 74,451 sq ft over 5 stories, against 74,888 sq ft over 6 here.
725 Market St scores 90 to its 68, and with the size held roughly equal most of that lead comes from daylight efficiency: 100 out of 100 here, 77 there (78% of the floor area within 35 ft of a facade, scored from 40% up to 90%). On the money they part ways: 401 Kearny St falls short even with the modeled grant, while 725 Market St 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 725 Market St $4.5M, 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 725 Market St
The 4 closest the screen also covers, from 80 ft away. They are the colored outlines on the plan at the top of this page.
- 735 Market St6 stories · 100% daylit · 49 estimated homes · scores 90/100 (Strong candidate)about 80 ft away
- 715 Market St7 stories · 100% daylit · 61 estimated homes · scores 91/100 (Strong candidate)about 90 ft away
- 32 3rd St5 stories · 98% daylit · 29 estimated homes · scores 88/100 (Strong candidate)about 190 ft away
- 47 Geary St5 stories · 93% daylit · 88 estimated homes · scores 93/100 (Strong candidate)about 300 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.