1215 19th St

1215 19th St is a 17-story apartment building in Greater Downtown Denver. Its floor plate has 91% of its area within daylight reach of a facade and scores 94 out of 100 on this screen’s measures, which is part of why it works as housing.

CO-1 · Screened 2026-10-04 · Already housing

Also addressed as 1251 19th St, 1255 19th St, 1275 19th St, 1905 Lawrence St and 1947 Lawrence St: Denver’s address records place all 6 on this one footprint.

Where 1215 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
1215 19th St

1215 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. 1215 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: 91% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 97%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 254 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 38 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: 254 sq ft on the floor the screen scores, and 21,069 sq ft over 16 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 204 apartments here, on 86% of the floor area they record. 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 16 residential floors this building carries 21,069 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 1215 19th St, 2026-10-04.

Suitability scoreStrong candidate	94 / 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	Floor 1: 70,302 sq ft · Floor 2: 70,104 sq ft · Floor 3: 55,710 sq ft · Floors 4–16: 8,222 sq ft · Floor 17: 554 sq ft
Floor platetypical floor, from the city outlines	8,222 sq ft
Daylight efficiencyshare within 35 ft of a facade	91%
Deepest interior pointviability threshold is 80 ft	38 ft
Windowless coretypical floor; the building-wide total is in the text above	254 sq ft
BuiltDenver does not publish a construction year with this data	—
ZoningUnion Station	D-C
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 368 ft of exterior wall, and across 16 residential floors the building carries 9,505 ft of it in total, divided among the 226 homes this screen estimates.

Its plate is compact at 0.76: 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 14.1 homes per floor. Its floors are not alike, though: the typical floor's deepest interior point is 38 ft from a facade, while its worst floor reaches 62 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 1215 19th St scores 94 out of 100

Daylight efficiency 100, Interior depth 100, Scale 100, Finance 59 — each out of 100, then weighted.

Score components for 1215 19th 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 38 ft from a facade, scored from 80 ft down to 40 ft	100	25%	25.0
Scale226 estimated homes, scored from 0 up to 150	100	15%	15.0
Financeremaining gap is 25% of conversion cost, scored from 60% down to 0%	59	15%	8.9

Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 59 out of 100: remaining gap is 25% of conversion cost, scored from 60% down to 0%.

Other buildings screened near 1215 19th St

The 4 closest the screen also covers, from 280 ft away. They are the colored outlines on the plan at the top of this page.

1925 Larimer St
8 stories · 100% daylit · already an apartment building
about 280 ft away
1956 Lawrence St
12 stories · 89% daylit · 160 estimated homes · scores 92/100 (Strong candidate)
about 290 ft away
1825 Lawrence St
18 stories · 83% daylit · 233 estimated homes · scores 76/100 (Strong candidate)
about 430 ft away
1955 Arapahoe St
13 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.