1370 19th St

1370 19th St is a 12-story apartment building in Greater Downtown Denver. Its floor plate has 76% of its area within daylight reach of a facade and scores 65 out of 100 on this screen’s measures, which is part of why it works as housing.

CO-1 · Screened 2026-09-19 · Already housing

Also addressed as 1800 Market St, 1840 Market St and 1890 Market St: Denver’s address records place all 4 on this one footprint.

Where 1370 19th 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
1370 19th St

1370 19th 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. 1370 19th 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: 76% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 71%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 13,235 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 60 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: 13,235 sq ft on the floor the screen scores, and 91,825 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 is already an apartment building: Denver's property records list 282 apartments here. It is on the map because the city's building outlines file it as commercial, but this site does not count it as a conversion candidate.

Across its 11 residential floors this building carries 91,825 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 4 street addresses across 45,161 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 1370 19th St, 2026-09-19.

Suitability scoreWorth a feasibility study	65 / 100
Storiesfrom 143 ft aerial-survey height ÷ 12 ft floor-to-floor	12
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–2: 48,140 sq ft · Floor 3: 47,757 sq ft · Floors 4–5: 45,161 sq ft · Floors 6–7: 42,534 sq ft · Floors 8–9: 32,711 sq ft · Floor 10: 25,216 sq ft · Floor 11: 23,042 sq ft · Floor 12: 545 sq ft
Floor platetypical floor, from the city outlines	45,161 sq ft
Daylight efficiencyshare within 35 ft of a facade	76%
Deepest interior pointviability threshold is 80 ft	60 ft
Windowless coretypical floor; the building-wide total is in the text above	13,235 sq ft
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

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 1,073 ft of exterior wall, and across 11 residential floors the building carries 10,238 ft of it in total, divided among the 313 homes this screen estimates.

Its plate is moderately compact at 0.49: a squarish plan, with enough perimeter for a conventional double-loaded corridor. How window line and plate shape are measured.

At the model’s 750 sq ft average, the plan works out at about 28.5 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 1370 19th St scores 65 out of 100

Daylight efficiency 72, Interior depth 50, Scale 100, Finance 34 — each out of 100, then weighted.

Score components for 1370 19th St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency76% of the floor area within 35 ft of a facade, scored from 40% up to 90%	72	45%	32.6
Interior depthdeepest interior point 60 ft from a facade, scored from 80 ft down to 40 ft	50	25%	12.6
Scale313 estimated homes, scored from 0 up to 150	100	15%	15.0
Financeremaining gap is 40% of conversion cost, scored from 60% down to 0%	34	15%	5.1

Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 34 out of 100: remaining gap is 40% of conversion cost, scored from 60% down to 0%.

Other buildings screened near 1370 19th 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.

1865 Larimer St
10 stories · 100% daylit · already an apartment building
about 160 ft away
1800 Larimer St
29 stories · 73% daylit · 614 estimated homes · scores 60/100 (Worth a feasibility study)
about 340 ft away
1441 18th St
12 stories · 88% daylit · 200 estimated homes · scores 78/100 (Strong candidate)
about 350 ft away
1925 Larimer St
8 stories · 100% daylit · already an apartment building
about 440 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.