899 N Bannock St
899 N Bannock St is a 17-story building in Greater Downtown Denver with 74% of its floor area within daylight reach of a facade. This screen estimates 621 homes and scores it 67 out of 100 for office-to-residential conversion suitability.
CO-1 · Screened 2026-09-19 · Worth a feasibility study
Also addressed as 909 N Bannock St: Denver’s address records place both on this one footprint.
Where 899 N Bannock St is
Its block in Greater Downtown Denver, drawn from Denver's own building outlines and street centerlines.
- Already housing
- Not screened
- 899 N Bannock St
This building does not pencil at default assumptions, even with a modeled RESIDE Act grant.
Across its 16 residential floors this building carries 208,776 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment.
Modeled conversion metrics for 899 N Bannock St, 2026-09-19.
| Suitability scoreWorth a feasibility study | 67 / 100 |
|---|---|
| Storiesfrom 203 ft aerial-survey height ÷ 12 ft floor-to-floor | 17 |
| Height bandsfloor plate by floor range, from the city's roof outlines | Floors 1–6: 60,067 sq ft · Floor 7: 59,432 sq ft · Floors 8–17: 43,177 sq ft |
| Floor platetypical floor, from the city outlines | 43,177 sq ft |
| Daylight efficiencyshare within 35 ft of a facade | 74% |
| Deepest interior pointviability threshold is 80 ft | 51 ft |
| Windowless coretypical floor; the building-wide total is in the text above | 4,665 sq ft |
| Estimated homesat 750 sq ft average | 621 |
| Conversion cost$360/sq ft all-in on 791,542 sq ft | $285.0M |
| Gap before grantshortfall against completed value | $138.4M |
| Modeled RESIDE grantat the statutory per-award cap | $10.0M |
| BuiltDenver does not publish a construction year with this data | — |
| ZoningCivic Center | D-GT |
| Opportunity Zonenot in a 2018 designated tract | No |
The plan: window line, shape and floor rhythm
31 ft of exterior wall for each home the screen estimates — enough for two- and three-bedroom homes across the plan.
The typical floor has 1,277 ft of exterior wall, and across 16 residential floors the building carries 19,381 ft of it in total, divided among the 621 homes this screen estimates.
Its plate is elongated at 0.33: 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 38.8 homes per floor. Its floors are not alike, though: the typical floor's deepest interior point is 51 ft from a facade, while its worst floor reaches 101 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 899 N Bannock St scores 67 out of 100
Daylight efficiency 67, Interior depth 72, Scale 100, Finance 25 — each out of 100, then weighted.
Score components for 899 N Bannock St. Points are the subscore times its weight.
| Component | Subscore | Weight | Points |
|---|---|---|---|
| Daylight efficiency74% of the floor area within 35 ft of a facade, scored from 40% up to 90% | 67 | 45% | 30.3 |
| Interior depthdeepest interior point 51 ft from a facade, scored from 80 ft down to 40 ft | 72 | 25% | 18.1 |
| Scale621 estimated homes, scored from 0 up to 150 | 100 | 15% | 15.0 |
| Financeremaining gap is 45% of conversion cost, scored from 60% down to 0% | 25 | 15% | 3.7 |
Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 25 out of 100: remaining gap is 45% of conversion cost, scored from 60% down to 0%.
What the conversion would cost
$360 per square foot all-in across 791,542 sq ft of converted floor, or $285.0M in total — about $459K for each of the 621 homes.
All-in cost per square foot for 899 N Bannock 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 208,776 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 621 homes is $146.6M.
What would have to be true
A $138.4M gap before any grant, $128.4M after the modeled one. The smallest single change that would close it: average unit size 47% down.
The shortfall before any grant is $138.4M. Closing it from the value side means each of the 621 homes finishing at $459K rather than the $236K the model assumes — 94% more. Closing it from the cost side means getting all-in cost down from $360 to $185 per square foot.
A modeled RESIDE grant of $10.0M moves that threshold to $443K a home. That is still above the $236K assumed, leaving $128.4M uncovered, which is why the grant does not unlock this one.
Nor do all four levers have to move. For 899 N Bannock St, one alone would close the gap at:
Single-assumption flip points for 899 N Bannock St, each holding the other three at their defaults.
| Average unit sizethe binding constraint — the least this building would need | 47% downto 400 sq ft |
|---|---|
| Conversion cost per square foot | 62% downto $98/sq ft |
| Completed value per home | 88% upto $443K |
All four are sliders in the survey, where 899 N Bannock St re-scores against your own numbers.
How it compares in Greater Downtown Denver
899 N Bannock St ranks 134th of the 214 buildings screened here, against a median score of 72.
Its floor plate is better lit than 24% of them, and shallower than 63% of them at its deepest interior point. On size it is the 23rd 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 Civic Center and the D-GT zone
12th of 23 in Civic Center, 10th of 15 zoned D-GT — the comparison that shares its rules, rents and streets.
Denver places 23 of the screened buildings in Civic Center. 899 N Bannock St ranks 12th of them against a median score of 67. 10 score 70 or more, their median deepest interior point is 62 ft from a facade against this building’s 51 ft, and together they would hold an estimated 5,064 homes. The group’s top scorer is 1314 N Elati St, at 92.
15 of the screened buildings are zoned D-GT. 899 N Bannock St ranks 10th of them against a median score of 76. 8 score 70 or more, their median deepest interior point is 54 ft from a facade against this building’s 51 ft, and together they would hold an estimated 2,397 homes. The group’s top scorer is 1314 N Elati St, at 92.
Its nearest match in size: 201 W Colfax Ave
The screened building closest to 899 N Bannock St in converted floor area is 201 W Colfax Ave: 782,553 sq ft over 16 stories, against 791,542 sq ft over 17 here.
899 N Bannock St scores 67 to its 38, and with the size held roughly equal most of that lead comes from daylight efficiency: 67 out of 100 here, 37 there (58% 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 3,600 ft apart.
Would it qualify for a RESIDE Act grant?
The model awards 899 N Bannock 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 899 N Bannock St
The 4 closest the screen also covers, from 480 ft away. They are the colored outlines on the plan at the top of this page.
- 140 W 10th Ave17 stories · 57% daylit · 505 estimated homes · scores 34/100 (Marginal)about 480 ft away
- 1000 N Cherokee St6 stories · 90% daylit · 83 estimated homes · scores 66/100 (Worth a feasibility study)about 660 ft away
- 930 N Acoma St7 stories · 100% daylit · already a condominium buildingabout 670 ft away
- 1029 N Cherokee St17 stories · 85% daylit · already an apartment buildingabout 720 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.