801 15th St

801 15th St is a 19-story building in Greater Downtown Denver with 92% of its floor area within daylight reach of a facade. This screen estimates 213 homes and scores it 94 out of 100 for office-to-residential conversion suitability.

CO-1 · Screened 2026-09-13 · Strong candidate

801 15th St — 92% of the building’s floor area sits within daylight reach of a facade; the drawing shows its typical floor, where the share is 100%. The hatched area is windowless core: 30 sq ft per typical floor that must be renovated but can never be rented as an apartment. Deepest interior point: 37 ft from the nearest window.

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

Across its 18 residential floors this building carries 17,348 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 801 15th St, 2026-09-13.
Suitability scoreStrong candidate	94 / 100
Storiesfrom 232 ft aerial-survey height ÷ 12 ft floor-to-floor	19
Height bandsfloor plate by floor range, from the city's roof outlines	Floors 1–7: 15,266 sq ft · Floors 8–18: 11,262 sq ft · Floor 19: 2,288 sq ft
Floor platetypical floor, from the city outlines	11,262 sq ft
Daylight efficiencyshare within 35 ft of a facade	92%
Deepest interior pointviability threshold is 80 ft	37 ft
Windowless coretypical floor; the building-wide total is in the text above	30 sq ft
Estimated homesat 750 sq ft average	213
Conversion cost$360/sq ft all-in on 217,763 sq ft	$78.4M
Gap before grantshortfall against completed value	$28.1M
Modeled RESIDE grantat the statutory per-award cap	$10.0M
ZoningCBD	D-TD

These figures are a screen, not a feasibility study, and they come from public footprint and height data rather than from plans. See how this was computed and what it cannot tell you, or open this building in the interactive survey to change the assumptions behind it.