625 E 19th Ave
625 E 19th Ave is a 5-story building in Greater Downtown Denver with 90% of its floor area within daylight reach of a facade. This screen estimates 297 homes and scores it 69 out of 100 for office-to-residential conversion suitability.
CO-1 · Screened 2026-09-19 · Worth a feasibility study
Also addressed as 629 E 19th Ave, 639 E 19th Ave, 649 E 19th Ave, 655 E 19th Ave, 661 E 19th Ave, 663 E 19th Ave, 667 E 19th Ave, 671 E 19th Ave, 675 E 19th Ave, 695 E 19th Ave, 650 E 20th Ave, 1906 N Pearl St, 1912 N Pearl St, 1920 N Pearl St, 1940 N Pearl St, 1980 N Pearl St and 1985 N Washington St: Denver’s address records place all 18 on this one footprint.
Where 625 E 19th Ave is
Its block in Greater Downtown Denver, drawn from Denver's own building outlines and street centerlines.
- Already housing
- Not screened
- 625 E 19th Ave
This building does not pencil at default assumptions, even with a modeled RESIDE Act grant.
Across its 4 residential floors this building carries 30,463 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 18 street addresses across 90,880 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 625 E 19th Ave, 2026-09-19.
| Suitability scoreWorth a feasibility study | 69 / 100 |
|---|---|
| Storiesfrom 61 ft aerial-survey height ÷ 12 ft floor-to-floor | 5 |
| Height bandsfloor plate by floor range, from the city's roof outlines | Floors 1–3: 90,880 sq ft · Floor 4: 66,440 sq ft · Floor 5: 61,565 sq ft |
| Floor platetypical floor, from the city outlines | 90,880 sq ft |
| Daylight efficiencyshare within 35 ft of a facade | 90% |
| Deepest interior pointviability threshold is 80 ft | 78 ft |
| Windowless coretypical floor; the building-wide total is in the text above | 14,707 sq ft |
| Estimated homesat 750 sq ft average | 297 |
| Conversion cost$360/sq ft all-in on 309,766 sq ft | $111.5M |
| Gap before grantshortfall against completed value | $41.4M |
| Modeled RESIDE grantat the statutory per-award cap | $10.0M |
| BuiltDenver does not publish a construction year with this data | — |
| ZoningNorth Capitol Hill | R-4-X |
| Opportunity Zonenot in a 2018 designated tract | No |
The plan: window line, shape and floor rhythm
33 ft of exterior wall for each home the screen estimates — enough for two- and three-bedroom homes across the plan.
The typical floor has 2,466 ft of exterior wall, and across 4 residential floors the building carries 9,716 ft of it in total, divided among the 297 homes this screen estimates.
Its plate is highly articulated at 0.19: 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 74.3 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.
Why 625 E 19th Ave scores 69 out of 100
Daylight efficiency 100, Interior depth 5, Scale 100, Finance 53 — each out of 100, then weighted.
Score components for 625 E 19th Ave. Points are the subscore times its weight.
| Component | Subscore | Weight | Points |
|---|---|---|---|
| Daylight efficiency90% of the floor area within 35 ft of a facade, scored from 40% up to 90% | 100 | 45% | 45.0 |
| Interior depthdeepest interior point 78 ft from a facade, scored from 80 ft down to 40 ft | 5 | 25% | 1.1 |
| Scale297 estimated homes, scored from 0 up to 150 | 100 | 15% | 15.0 |
| Financeremaining gap is 28% of conversion cost, scored from 60% down to 0% | 53 | 15% | 8.0 |
Most of what it earns comes from daylight efficiency, and what holds it back most is interior depth, at 5 out of 100: deepest interior point 78 ft from a facade, scored from 80 ft down to 40 ft.
What the conversion would cost
$360 per square foot all-in across 309,766 sq ft of converted floor, or $111.5M in total — about $375K for each of the 297 homes.
All-in cost per square foot for 625 E 19th Ave: 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 30,463 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 297 homes is $70.1M.
What would have to be true
A $41.4M gap before any grant, $31.4M after the modeled one. The smallest single change that would close it: average unit size 31% down.
The shortfall before any grant is $41.4M. Closing it from the value side means each of the 297 homes finishing at $375K rather than the $236K the model assumes — 59% more. Closing it from the cost side means getting all-in cost down from $360 to $226 per square foot.
A modeled RESIDE grant of $10.0M moves that threshold to $342K a home. That is still above the $236K assumed, leaving $31.4M uncovered, which is why the grant does not unlock this one.
Nor do all four levers have to move. For 625 E 19th Ave, one alone would close the gap at:
Single-assumption flip points for 625 E 19th Ave, each holding the other three at their defaults.
| Average unit sizethe binding constraint — the least this building would need | 31% downto 518 sq ft |
|---|---|
| Conversion cost per square foot | 39% downto $159/sq ft |
| Completed value per home | 45% upto $342K |
All four are sliders in the survey, where 625 E 19th Ave re-scores against your own numbers.
How it compares in Greater Downtown Denver
625 E 19th Ave ranks 119th of the 214 buildings screened here, against a median score of 72.
Its floor plate is better lit than 75% of them, and shallower than 6% of them at its deepest interior point. On size it is the 69th 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 North Capitol Hill and the R-4-X zone
33rd of 41 in North Capitol Hill, 4th of 4 zoned R-4-X — the comparison that shares its rules, rents and streets.
Denver places 41 of the screened buildings in North Capitol Hill. 625 E 19th Ave ranks 33rd of them against a median score of 85. 32 score 70 or more, their median deepest interior point is 47 ft from a facade against this building’s 78 ft, and together they would hold an estimated 8,820 homes. The group’s top scorer is 1776 N Grant St, at 97.
4 of the screened buildings are zoned R-4-X. 625 E 19th Ave ranks 4th of them against a median score of 90. 3 score 70 or more, their median deepest interior point is 43 ft from a facade against this building’s 78 ft, and together they would hold an estimated 717 homes. The group’s top scorer is 500 E 19th Ave, at 95.
Its nearest match in size: 721 19th St
The screened building closest to 625 E 19th Ave in converted floor area is 721 19th St: 325,377 sq ft over 8 stories, against 309,766 sq ft over 5 here.
625 E 19th Ave scores 69 to its 95, and with the size held roughly equal most of that shortfall comes from interior depth: 5 out of 100 here, 100 there (deepest interior point 32 ft from a facade, scored from 80 ft down to 40 ft). On the money they sit in the same place: each falls short even with the modeled grant. The two stand about 2,600 ft apart.
Would it qualify for a RESIDE Act grant?
The model awards 625 E 19th Ave $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 625 E 19th Ave
The 4 closest the screen also covers, from 370 ft away. They are the colored outlines on the plan at the top of this page.
- 530 E 20th Ave7 stories · 100% daylit · 59 estimated homes · scores 88/100 (Strong candidate)about 370 ft away
- 100 Park Ave W20 stories · 95% daylit · already a condominium buildingabout 390 ft away
- 1860 N Washington St6 stories · 100% daylit · already a condominium buildingabout 490 ft away
- 500 E 19th Ave6 stories · 98% daylit · 172 estimated homes · scores 95/100 (Strong candidate)about 500 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.