3600 Blake St
3600 Blake St is a 10-story building in Greater Downtown Denver with 69% of its floor area within daylight reach of a facade. This screen estimates 362 homes and scores it 56 out of 100 for office-to-residential conversion suitability.
CO-1 · Screened 2026-09-19 · Worth a feasibility study
Also addressed as 3636 Blake St, 3650 Blake St, 3654 Blake St, 3660 Blake St, 3662 Blake St, 3668 Blake St, 3657 N Downing St, 3767 N Downing St, 3601 Walnut St, 3603 Walnut St, 3605 Walnut St and 3611 Walnut St: Denver’s address records place all 13 on this one footprint.
Where 3600 Blake St is
Its block in Greater Downtown Denver, drawn from Denver's own building outlines and street centerlines.
- Already housing
- Not screened
- 3600 Blake St
This building does not pencil at default assumptions, even with a modeled RESIDE Act grant.
Across its 9 residential floors this building carries 153,793 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment.
Read with caution. This footprint carries 13 street addresses across 60,002 sq ft, which usually means the city’s GIS has merged a block or complex into a single polygon rather than describing one convertible building.
Modeled conversion metrics for 3600 Blake St, 2026-09-19.
| Suitability scoreWorth a feasibility study | 56 / 100 |
|---|---|
| Storiesfrom 125 ft aerial-survey height ÷ 12 ft floor-to-floor | 10 |
| Height bandsfloor plate by floor range, from the city's roof outlines | Floors 1–3: 84,040 sq ft · Floors 4–7: 60,002 sq ft · Floors 8–9: 41,850 sq ft · Floor 10: 1,466 sq ft |
| Floor platetypical floor, from the city outlines | 60,002 sq ft |
| Daylight efficiencyshare within 35 ft of a facade | 69% |
| Deepest interior pointviability threshold is 80 ft | 62 ft |
| Windowless coretypical floor; the building-wide total is in the text above | 13,443 sq ft |
| Estimated homesat 750 sq ft average | 362 |
| Conversion cost$360/sq ft all-in on 493,252 sq ft | $177.6M |
| Gap before grantshortfall against completed value | $92.1M |
| Modeled RESIDE grantat the statutory per-award cap | $10.0M |
| BuiltDenver does not publish a construction year with this data | — |
| ZoningFive Points | C-MX-12 |
| Opportunity Zonenot in a 2018 designated tract | No |
The plan: window line, shape and floor rhythm
34 ft of exterior wall for each home the screen estimates — enough for two- and three-bedroom homes across the plan.
The typical floor has 1,660 ft of exterior wall, and across 9 residential floors the building carries 12,173 ft of it in total, divided among the 362 homes this screen estimates.
Its plate is elongated at 0.27: 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 40.2 homes per floor. Its floors are not alike, though: the typical floor's deepest interior point is 62 ft from a facade, while its worst floor reaches 128 ft. The score follows the typical floor, so a podium that could not hold a bedroom does not by itself sink a slim tower above it — but it is there, and it is part of what would have to be drawn around.
Why 3600 Blake St scores 56 out of 100
Daylight efficiency 58, Interior depth 45, Scale 100, Finance 23 — each out of 100, then weighted.
Score components for 3600 Blake St. Points are the subscore times its weight.
| Component | Subscore | Weight | Points |
|---|---|---|---|
| Daylight efficiency69% of the floor area within 35 ft of a facade, scored from 40% up to 90% | 58 | 45% | 25.9 |
| Interior depthdeepest interior point 62 ft from a facade, scored from 80 ft down to 40 ft | 45 | 25% | 11.3 |
| Scale362 estimated homes, scored from 0 up to 150 | 100 | 15% | 15.0 |
| Financeremaining gap is 46% of conversion cost, scored from 60% down to 0% | 23 | 15% | 3.4 |
Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 23 out of 100: remaining gap is 46% of conversion cost, scored from 60% down to 0%.
What the conversion would cost
$360 per square foot all-in across 493,252 sq ft of converted floor, or $177.6M in total — about $491K for each of the 362 homes.
All-in cost per square foot for 3600 Blake St: base cost plus the code work a change of use triggers.
| Base conversion cost | $260/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 | $360/sq ft |
That cost is charged across every converted square foot, including the 153,793 sq ft of windowless core, which has to be gutted, re-plumbed and sprinklered like the rest of the building and then earns nothing. Against it the model sets a completed value of $236K a home, which for 362 homes is $85.4M.
What would have to be true
A $92.1M gap before any grant, $82.1M after the modeled one. The smallest single change that would close it: average unit size 49% down.
The shortfall before any grant is $92.1M. Closing it from the value side means each of the 362 homes finishing at $491K rather than the $236K the model assumes — 108% more. Closing it from the cost side means getting all-in cost down from $360 to $173 per square foot.
A modeled RESIDE grant of $10.0M moves that threshold to $463K a home. That is still above the $236K assumed, leaving $82.1M uncovered, which is why the grant does not unlock this one.
Nor do all four levers have to move. For 3600 Blake St, one alone would close the gap at:
Single-assumption flip points for 3600 Blake St, each holding the other three at their defaults.
| Average unit sizethe binding constraint — the least this building would need | 49% downto 382 sq ft |
|---|---|
| Conversion cost per square foot | 64% downto $93/sq ft |
| Completed value per home | 96% upto $463K |
All four are sliders in the survey, where 3600 Blake St re-scores against your own numbers.
How it compares in Greater Downtown Denver
3600 Blake St ranks 181st of the 214 buildings screened here, against a median score of 72.
Its floor plate is better lit than 10% of them, and shallower than 30% of them at its deepest interior point. On size it is the 56th largest by estimated homes. The full survey of all 214 buildings ranks and maps every one of them, and the list by address links each to its own page.
Within Five Points and the C-MX-12 zone
17th of 20 in Five Points, 16th of 16 zoned C-MX-12 — the comparison that shares its rules, rents and streets.
Denver places 20 of the screened buildings in Five Points. 3600 Blake St ranks 17th of them against a median score of 68. 9 score 70 or more, their median deepest interior point is 61 ft from a facade against this building’s 62 ft, and together they would hold an estimated 5,122 homes. The group’s top scorer is 3355 Denargo St, at 90.
16 of the screened buildings are zoned C-MX-12. 3600 Blake St ranks 16th of them against a median score of 85. 13 score 70 or more, their median deepest interior point is 44 ft from a facade against this building’s 62 ft, and together they would hold an estimated 2,011 homes. The group’s top scorer is 1776 N Grant St, at 97.
Its nearest match in size: 1200 N Acoma St
The screened building closest to 3600 Blake St in converted floor area is 1200 N Acoma St: 498,318 sq ft over 11 stories, against 493,252 sq ft over 10 here.
3600 Blake St scores 56 and 1200 N Acoma St only 35, and the difference is a hard fail rather than a matter of degree: the lower one is capped at 35 because its deepest interior point is 149 ft from a facade, past the 80 ft threshold beyond which conversion requires carving a light well. On the money they sit in the same place: each falls short even with the modeled grant. The two stand about 12,800 ft apart.
Would it qualify for a RESIDE Act grant?
The model awards 3600 Blake St $10.0M, 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 3600 Blake St
The 4 closest the screen also covers, from 530 ft away. They are the colored outlines on the plan at the top of this page.
- 3773 Walnut St6 stories · 95% daylit · already an apartment buildingabout 530 ft away
- 3501 Blake St5 stories · 98% daylit · 54 estimated homes · scores 86/100 (Strong candidate)about 580 ft away
- 3463 Walnut St13 stories · 88% daylit · already an apartment buildingabout 850 ft away
- 1831 35th St10 stories · 81% daylit · 177 estimated homes · scores 77/100 (Strong candidate)about 1,400 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.