1580 N Logan St

1580 N Logan St is a 11-story building in Greater Downtown Denver with 91% of its floor area within daylight reach of a facade. This screen estimates 92 homes and scores it 85 out of 100 for office-to-residential conversion suitability.

CO-1 · Screened 2026-09-19 · Strong candidate

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Where 1580 N Logan St is

Its block in Greater Downtown Denver, drawn from Denver's own building outlines and street centerlines.

Suitability score

0–29

30–49

50–69

70–100

Already housing
Not screened
1580 N Logan St

1580 N Logan St and the 1,000 ft of Greater Downtown Denver around it. The streets are drawn at the width of the right-of-way they run down, sidewalks included, and named, and every building on these blocks is drawn. What is left open and stippled is neither: a surface lot, a plaza or a vacant parcel. The screened buildings are colored by the ramp above, the same one the district map uses, carry their score, and each is a link to its own page. Each casts a shadow as long as its measured height lets it, so towers stand out from the low buildings around them; the unscreened buildings have no measured height and cast none. 1580 N Logan St is outlined in its own score color at the outline it covers at ground level. Dashed inside it is the typical floor, the one the floor-plate figure below draws, because this building steps back as it rises. Its windowless core is hatched. The inset places it among every building the screen covers.

Typical floor plan: 91% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 91%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 943 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 47 ft from the nearest window. A–A is where the section beside it is cut.

Section A–A: cut across the depth of the plate, through the middle of the core. Daylight reaches 35 ft in from every facade, fading as it goes, and the hatched stripe left between the lit edges is floor that gets converted and can never be rented: 943 sq ft on the floor the screen scores, and 9,013 sq ft over 10 residential floors. The steps are where the building sets back as it rises. The shaded ground floor is converted like the rest and counted as no homes.

This building does not pencil at default assumptions, even with a modeled RESIDE Act grant.

Across its 10 residential floors this building carries 9,013 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 1580 N Logan St, 2026-09-19.

Suitability scoreStrong candidate	85 / 100
Storiesfrom 137 ft aerial-survey height ÷ 12 ft floor-to-floor	11
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–2: 12,642 sq ft · Floors 3–10: 10,316 sq ft · Floor 11: 524 sq ft
Floor platetypical floor, from the city outlines	10,316 sq ft
Daylight efficiencyshare within 35 ft of a facade	91%
Deepest interior pointviability threshold is 80 ft	47 ft
Windowless coretypical floor; the building-wide total is in the text above	943 sq ft
Estimated homesat 750 sq ft average	92
Conversion cost$360/sq ft all-in on 95,696 sq ft	$34.5M
Gap before grantshortfall against completed value	$12.7M
Modeled RESIDE grantbelow the statutory cap	$5.5M
BuiltDenver does not publish a construction year with this data	—
ZoningNorth Capitol Hill	C-MX-12
Opportunity Zonenot in a 2018 designated tract	No

The plan: window line, shape and floor rhythm

42 ft of exterior wall for each home the screen estimates — enough for two- and three-bedroom homes across the plan.

The typical floor has 408 ft of exterior wall, and across 10 residential floors the building carries 3,828 ft of it in total, divided among the 92 homes this screen estimates.

Its plate is compact at 0.78: close to a square or a circle, the most efficient envelope an office can have and the least generous one for apartments: little perimeter to divide among homes. How window line and plate shape are measured.

At the model’s 750 sq ft average, the plan works out at about 9.2 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 1580 N Logan St scores 85 out of 100

Daylight efficiency 100, Interior depth 84, Scale 61, Finance 65 — each out of 100, then weighted.

Score components for 1580 N Logan St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency91% of the floor area within 35 ft of a facade, scored from 40% up to 90%	100	45%	45.0
Interior depthdeepest interior point 47 ft from a facade, scored from 80 ft down to 40 ft	84	25%	20.9
Scale92 estimated homes, scored from 0 up to 150	61	15%	9.2
Financeremaining gap is 21% of conversion cost, scored from 60% down to 0%	65	15%	9.8

Most of what it earns comes from daylight efficiency, and what holds it back most is scale, at 61 out of 100: 92 estimated homes, scored from 0 up to 150.

What the conversion would cost

$360 per square foot all-in across 95,696 sq ft of converted floor, or $34.5M in total — about $374K for each of the 92 homes.

All-in cost per square foot for 1580 N Logan 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 9,013 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 92 homes is $21.7M.

What would have to be true

A $12.7M gap before any grant, $7.2M after the modeled one. The smallest single change that would close it: average unit size 21% down.

The shortfall before any grant is $12.7M. Closing it from the value side means each of the 92 homes finishing at $374K rather than the $236K the model assumes — 59% more. Closing it from the cost side means getting all-in cost down from $360 to $227 per square foot.

A modeled RESIDE grant of $5.5M moves that threshold to $314K a home. That is still above the $236K assumed, leaving $7.2M uncovered, which is why the grant does not unlock this one.

Nor do all four levers have to move. For 1580 N Logan St, one alone would close the gap at:

Single-assumption flip points for 1580 N Logan St, each holding the other three at their defaults.

Average unit sizethe binding constraint — the least this building would need	21% downto 593 sq ft
Conversion cost per square foot	29% downto $185/sq ft
Completed value per home	33% upto $314K

All four are sliders in the survey, where 1580 N Logan St re-scores against your own numbers.

How it compares in Greater Downtown Denver

1580 N Logan St ranks 56th of the 214 buildings screened here, against a median score of 72.

Its floor plate is better lit than 77% of them, and shallower than 73% of them at its deepest interior point. On size it is the 163rd 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 C-MX-12 zone

19th of 41 in North Capitol Hill, 9th of 16 zoned C-MX-12 — the comparison that shares its rules, rents and streets.

Denver places 41 of the screened buildings in North Capitol Hill. 1580 N Logan St ranks 19th 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 47 ft, and together they would hold an estimated 8,820 homes. The group’s top scorer is 1776 N Grant St, at 97.

16 of the screened buildings are zoned C-MX-12. 1580 N Logan St ranks 9th 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 47 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: 1890 Wynkoop St

The screened building closest to 1580 N Logan St in converted floor area is 1890 Wynkoop St: 96,329 sq ft over 8 stories, against 95,696 sq ft over 11 here.

1580 N Logan St scores 85 to its 69, and with the size held roughly equal most of that lead comes from interior depth: 84 out of 100 here, 49 there (deepest interior point 61 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 6,400 ft apart.

Would it qualify for a RESIDE Act grant?

The model awards 1580 N Logan St $5.5M, 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 1580 N Logan St

The 4 closest the screen also covers, from 160 ft away. They are the colored outlines on the plan at the top of this page.

1575 N Pennsylvania St
10 stories · 100% daylit · already an apartment building
about 160 ft away
333 E 16th Ave
8 stories · 100% daylit · already an apartment building
about 290 ft away
401 E Colfax Ave
7 stories · 96% daylit · 84 estimated homes · scores 89/100 (Strong candidate)
about 320 ft away
1615 N Pennsylvania St
7 stories · 98% daylit · already an apartment building
about 320 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.