721 19th St
721 19th St is a 8-story building in Greater Downtown Denver with 100% of its floor area within daylight reach of a facade. This screen estimates 347 homes and scores it 95 out of 100 for office-to-residential conversion suitability.
CO-1 · Screened 2026-10-04 · Strong candidate
No address point in Denver’s records falls inside this footprint, so it is named by the closest one that no other screened building claims — usually a site entrance, but check the outline on the plan below before relying on the street number.
Where 721 19th St is
Its block in Greater Downtown Denver, drawn from Denver's own building outlines and street centerlines.
- Already housing
- Not screened
- 721 19th St
This building does not pencil at default assumptions, even with a modeled RESIDE Act grant.
This footprint has no windowless core at all: every point on the floor plate is within 35 ft of a facade, which is unusual and is the main reason it scores as well as it does.
Read with caution. This footprint carries 4 street addresses across 45,237 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 721 19th St, 2026-10-04.
| Suitability scoreStrong candidate | 95 / 100 |
|---|---|
| Storiesfrom 100 ft aerial-survey height ÷ 12 ft floor-to-floor | 8 |
| Height bandsfloor plate by floor range, from the city's roof outlines | Floors 1–2: 49,819 sq ft · Floor 3: 49,373 sq ft · Floors 4–8: 45,237 sq ft |
| Floor platetypical floor, from the city outlines | 45,237 sq ft |
| Daylight efficiencyshare within 35 ft of a facade | 100% |
| Deepest interior pointviability threshold is 80 ft | 32 ft |
| Windowless coretypical floor; the building-wide total is in the text above | 0 sq ft |
| Estimated homesat 750 sq ft average | 347 |
| Conversion cost$360/sq ft all-in on 325,377 sq ft | $117.1M |
| Gap before grantshortfall against completed value | $35.2M |
| Modeled RESIDE grantat the statutory per-award cap | $10.0M |
| BuiltDenver does not publish a construction year with this data | — |
| ZoningCBD | D-C |
| 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 1,760 ft of exterior wall, and across 7 residential floors the building carries 12,727 ft of it in total, divided among the 347 homes this screen estimates.
Its plate is highly articulated at 0.18: a long, notched or wing-shaped outline with far more facade than its area needs — wasteful as an office envelope, and close to ideal for apartments. How window line and plate shape are measured.
At the model’s 750 sq ft average, the plan works out at about 49.6 homes per floor. Its floors are not alike, though: the typical floor's deepest interior point is 32 ft from a facade, while its worst floor reaches 35 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 721 19th St scores 95 out of 100
Daylight efficiency 100, Interior depth 100, Scale 100, Finance 64 — each out of 100, then weighted.
Score components for 721 19th St. Points are the subscore times its weight.
| Component | Subscore | Weight | Points |
|---|---|---|---|
| Daylight efficiency100% of the floor area within 35 ft of a facade, scored from 40% up to 90% | 100 | 45% | 45.0 |
| Interior depthdeepest interior point 32 ft from a facade, scored from 80 ft down to 40 ft | 100 | 25% | 25.0 |
| Scale347 estimated homes, scored from 0 up to 150 | 100 | 15% | 15.0 |
| Financeremaining gap is 22% of conversion cost, scored from 60% down to 0% | 64 | 15% | 9.6 |
Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 64 out of 100: remaining gap is 22% of conversion cost, scored from 60% down to 0%.
What the conversion would cost
$360 per square foot all-in across 325,377 sq ft of converted floor, or $117.1M in total — about $338K for each of the 347 homes.
All-in cost per square foot for 721 19th 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 circulation and service area that earns nothing directly. Against it the model sets a completed value of $236K a home, which for 347 homes is $81.9M.
What would have to be true
A $35.2M gap before any grant, $25.2M after the modeled one. The smallest single change that would close it: average unit size 24% down.
The shortfall before any grant is $35.2M. Closing it from the value side means each of the 347 homes finishing at $338K rather than the $236K the model assumes — 43% more. Closing it from the cost side means getting all-in cost down from $360 to $252 per square foot.
A modeled RESIDE grant of $10.0M moves that threshold to $309K a home. That is still above the $236K assumed, leaving $25.2M uncovered, which is why the grant does not unlock this one.
Nor do all four levers have to move. For 721 19th St, one alone would close the gap at:
Single-assumption flip points for 721 19th St, each holding the other three at their defaults.
| Average unit sizethe binding constraint — the least this building would need | 24% downto 573 sq ft |
|---|---|
| Conversion cost per square foot | 30% downto $182/sq ft |
| Completed value per home | 31% upto $309K |
All four are sliders in the survey, where 721 19th St re-scores against your own numbers.
How it compares in Greater Downtown Denver
721 19th St ranks 8th of the 208 buildings screened here, against a median score of 73.
Its floor plate is better lit than 100% of them, and shallower than 92% of them at its deepest interior point. On size it is the 61st largest by estimated homes. The full survey of all 208 buildings ranks and maps every one of them, and the list by address links each to its own page.
Within CBD and the D-C zone
3rd of 74 in CBD, 1st of 70 zoned D-C — the comparison that shares its rules, rents and streets.
Denver places 74 of the screened buildings in CBD. 721 19th St ranks 3rd of them against a median score of 71. 38 score 70 or more, their median deepest interior point is 57 ft from a facade against this building’s 32 ft, and together they would hold an estimated 33,455 homes. The group’s top scorer is 918 17th St, at 97.
70 of the screened buildings are zoned D-C. 721 19th St ranks 1st of them against a median score of 72, the top score in the group. 36 score 70 or more, their median deepest interior point is 58 ft from a facade against this building’s 32 ft, and together they would hold an estimated 32,185 homes.
Its nearest match in size: 1823 Stout St
The screened building closest to 721 19th St in converted floor area is 1823 Stout St: 330,048 sq ft over 8 stories, against 325,377 sq ft over 8 here.
721 19th St scores 95 to its 78, and with the size held roughly equal most of that lead comes from daylight efficiency: 100 out of 100 here, 73 there (76% of the floor area within 35 ft of a facade, scored from 40% up to 90%). On the money they sit in the same place: each falls short even with the modeled grant. The two stand about 600 ft apart.
Would it qualify for a RESIDE Act grant?
The model awards 721 19th 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 721 19th St
The 4 closest the screen also covers, from 380 ft away. They are the colored outlines on the plan at the top of this page.
- 1929 Stout St22 stories · 75% daylit · 554 estimated homes · scores 69/100 (Worth a feasibility study)about 380 ft away
- 1999 N Broadway46 stories · 91% daylit · 802 estimated homes · scores 83/100 (Strong candidate)about 400 ft away
- 1801 California St59 stories · 67% daylit · 1,381 estimated homes · scores 52/100 (Worth a feasibility study)about 460 ft away
- 2014 California St12 stories · 87% daylit · already an apartment buildingabout 560 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.