1351 16th St

1351 16th St is a 12-story building in Greater Downtown Denver with 86% of its floor area within daylight reach of a facade. This screen estimates 225 homes and scores it 77 out of 100 for office-to-residential conversion suitability.

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

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Also addressed as 1330 17th St, 1350 17th St, 1380 17th St, 1616 Market St, 1620 Market St, 1624 Market St, 1626 Market St, 1630 Market St, 1632 Market St, 1640 Market St, 1642 Market St and 1650 Market St: Denver’s address records place all 13 on this one footprint.

Where 1351 16th 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
1351 16th St

1351 16th 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. 1351 16th 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: 86% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 83%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 8,133 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 58 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: 8,133 sq ft on the floor the screen scores, and 35,800 sq ft over 11 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 11 residential floors this building carries 35,800 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 46,964 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 1351 16th St, 2026-09-19.

Suitability scoreStrong candidate	77 / 100
Storiesfrom 142 ft aerial-survey height ÷ 12 ft floor-to-floor	12
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–4: 46,964 sq ft · Floor 5: 32,039 sq ft · Floors 6–7: 14,494 sq ft · Floors 8–11: 11,025 sq ft · Floor 12: 1,526 sq ft
Floor platetypical floor, from the city outlines	46,964 sq ft
Daylight efficiencyshare within 35 ft of a facade	86%
Deepest interior pointviability threshold is 80 ft	58 ft
Windowless coretypical floor; the building-wide total is in the text above	8,133 sq ft
Estimated homesat 750 sq ft average	225
Conversion cost$360/sq ft all-in on 247,546 sq ft	$89.1M
Gap before grantshortfall against completed value	$36.0M
Modeled RESIDE grantat the statutory per-award cap	$10.0M
BuiltDenver does not publish a construction year with this data	—
ZoningUnion Station	D-LD
Opportunity Zonenot in a 2018 designated tract	No

The plan: window line, shape and floor rhythm

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

The typical floor has 1,336 ft of exterior wall, and across 11 residential floors the building carries 8,054 ft of it in total, divided among the 225 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 20.5 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 1351 16th St scores 77 out of 100

Daylight efficiency 91, Interior depth 54, Scale 100, Finance 51 — each out of 100, then weighted.

Score components for 1351 16th St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency86% of the floor area within 35 ft of a facade, scored from 40% up to 90%	91	45%	41.0
Interior depthdeepest interior point 58 ft from a facade, scored from 80 ft down to 40 ft	54	25%	13.5
Scale225 estimated homes, scored from 0 up to 150	100	15%	15.0
Financeremaining gap is 29% of conversion cost, scored from 60% down to 0%	51	15%	7.7

Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 51 out of 100: remaining gap is 29% of conversion cost, scored from 60% down to 0%.

What the conversion would cost

$360 per square foot all-in across 247,546 sq ft of converted floor, or $89.1M in total — about $396K for each of the 225 homes.

All-in cost per square foot for 1351 16th 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 35,800 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 225 homes is $53.1M.

What would have to be true

A $36.0M gap before any grant, $26.0M after the modeled one. The smallest single change that would close it: average unit size 33% down.

The shortfall before any grant is $36.0M. Closing it from the value side means each of the 225 homes finishing at $396K rather than the $236K the model assumes — 68% more. Closing it from the cost side means getting all-in cost down from $360 to $215 per square foot.

A modeled RESIDE grant of $10.0M moves that threshold to $352K a home. That is still above the $236K assumed, leaving $26.0M uncovered, which is why the grant does not unlock this one.

Nor do all four levers have to move. For 1351 16th St, one alone would close the gap at:

Single-assumption flip points for 1351 16th St, each holding the other three at their defaults.

Average unit sizethe binding constraint — the least this building would need	33% downto 504 sq ft
Conversion cost per square foot	40% downto $155/sq ft
Completed value per home	49% upto $352K

All four are sliders in the survey, where 1351 16th St re-scores against your own numbers.

How it compares in Greater Downtown Denver

1351 16th St ranks 90th of the 214 buildings screened here, against a median score of 72.

Its floor plate is better lit than 59% of them, and shallower than 49% of them at its deepest interior point. On size it is the 99th 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 Union Station and the D-LD zone

18th of 55 in Union Station, 6th of 29 zoned D-LD — the comparison that shares its rules, rents and streets.

Denver places 55 of the screened buildings in Union Station. 1351 16th St ranks 18th of them against a median score of 69. 23 score 70 or more, their median deepest interior point is 61 ft from a facade against this building’s 58 ft, and together they would hold an estimated 13,167 homes. The group’s top scorer is 1600 17th St, at 95.

29 of the screened buildings are zoned D-LD. 1351 16th St ranks 6th of them against a median score of 68. 10 score 70 or more, their median deepest interior point is 61 ft from a facade against this building’s 58 ft, and together they would hold an estimated 5,069 homes. The group’s top scorer is 1600 17th St, at 95.

Its nearest match in size: 724 17th St

The screened building closest to 1351 16th St in converted floor area is 724 17th St: 256,035 sq ft over 12 stories, against 247,546 sq ft over 12 here.

1351 16th St scores 77 to its 94, and with the size held roughly equal most of that shortfall comes from interior depth: 54 out of 100 here, 100 there (deepest interior point 35 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 2,100 ft apart.

Would it qualify for a RESIDE Act grant?

The model awards 1351 16th 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 1351 16th St

The 4 closest the screen also covers, from 150 ft away. They are the colored outlines on the plan at the top of this page.

1301 16th St
26 stories · 87% daylit · already a condominium building
about 150 ft away
1415 16th St
11 stories · 88% daylit · already an apartment building
about 250 ft away
1660 Blake St
6 stories · 100% daylit · 71 estimated homes · scores 89/100 (Strong candidate)
about 350 ft away
1321 15th St
12 stories · 76% daylit · 216 estimated homes · scores 72/100 (Strong candidate)
about 480 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.