30 S 15TH ST

30 S 15TH ST is a 25-story building in Center City Philadelphia with 91% of its floor area within daylight reach of a facade. This screen estimates 278 homes and scores it 88 out of 100 for office-to-residential conversion suitability.

PA-2 & PA-3 · Screened 2026-09-15 · Strong candidate

30 S 15TH ST — 91% of each floor sits within daylight reach of a facade. The hatched area is windowless core: 1,014 sq ft per floor that must be renovated but can never be rented as an apartment. Deepest interior point: 45 ft from the nearest window.

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

Every floor carries 1,014 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment. Across 24 residential floors that is 24,344 sq ft of cost carrying no revenue.

Modeled conversion metrics for 30 S 15TH ST, 2026-09-15.
Suitability scoreStrong candidate	88 / 100
Storiesfrom 349 ft LiDAR height ÷ 12 ft floor-to-floor	25
Floor plateper floor, from the city footprint	11,875 sq ft
Daylight efficiencyshare within 35 ft of a facade	91%
Deepest interior pointviability threshold is 80 ft	45 ft
Windowless coreper floor — renovated but never rentable	1,014 sq ft
Estimated homesat 750 sq ft average	278
Conversion cost$360/sq ft all-in on 285,012 sq ft	$102.6M
Gap before grantshortfall against completed value	$47.9M
Modeled RESIDE grantat the statutory per-award cap	$10.0M
ZoningCenter City Philadelphia	CMX5
Opportunity Zonenot in a 2018 designated tract	No

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.