999 17th St

999 17th St is a 28-story apartment building in Greater Downtown Denver. Its floor plate has 83% of its area within daylight reach of a facade and scores 70 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 1776 Curtis St: Denver’s address records place both on this one footprint.

Where 999 17th 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
999 17th St

999 17th 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. 999 17th 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: 83% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 65%. The shading is daylight, darkest at the windows and gone 35 ft in. The hatched area is windowless core: 16,987 sq ft per typical floor that must be renovated but can never be rented as an apartment. The dimension marks the deepest interior point, 62 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: 16,987 sq ft on the floor the screen scores, and 128,817 sq ft over 27 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 359 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 27 residential floors this building carries 128,817 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 999 17th St, 2026-09-19.

Suitability scoreWorth a feasibility study	70 / 100
Storiesfrom 335 ft aerial-survey height ÷ 12 ft floor-to-floor	28
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–8: 48,312 sq ft · Floors 9–12: 30,926 sq ft · Floors 13–27: 18,441 sq ft · Floor 28: 2,750 sq ft
Floor platetypical floor, from the city outlines	48,312 sq ft
Daylight efficiencyshare within 35 ft of a facade	83%
Deepest interior pointviability threshold is 80 ft	62 ft
Windowless coretypical floor; the building-wide total is in the text above	16,987 sq ft
BuiltDenver does not publish a construction year with this data	—
ZoningCBD	D-C
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 1,053 ft of exterior wall, and across 27 residential floors the building carries 23,707 ft of it in total, divided among the 653 homes this screen estimates.

Its plate is moderately compact at 0.55: 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 24.2 homes per floor, repeated on every residential floor, since this building's outline does not change as it rises.

Why 999 17th St scores 70 out of 100

Daylight efficiency 85, Interior depth 44, Scale 100, Finance 36 — each out of 100, then weighted.

Score components for 999 17th St. Points are the subscore times its weight.

Component	Subscore	Weight	Points
Daylight efficiency83% of the floor area within 35 ft of a facade, scored from 40% up to 90%	85	45%	38.4
Interior depthdeepest interior point 62 ft from a facade, scored from 80 ft down to 40 ft	44	25%	11.1
Scale653 estimated homes, scored from 0 up to 150	100	15%	15.0
Financeremaining gap is 39% of conversion cost, scored from 60% down to 0%	36	15%	5.4

Most of what it earns comes from daylight efficiency, and what holds it back most is finance, at 36 out of 100: remaining gap is 39% of conversion cost, scored from 60% down to 0%.

Other buildings screened near 999 17th St

The 4 closest the screen also covers, from 140 ft away. They are the colored outlines on the plan at the top of this page.

909 17th St
14 stories · 88% daylit · 402 estimated homes · scores 76/100 (Strong candidate)
about 140 ft away
1001 17th St
27 stories · 62% daylit · 609 estimated homes · scores 35/100 (Marginal)
about 290 ft away
821 17th St
15 stories · 98% daylit · 361 estimated homes · scores 87/100 (Strong candidate)
about 340 ft away
918 17th St
10 stories · 100% daylit · 176 estimated homes · scores 97/100 (Strong candidate)
about 390 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.