117 N 8TH ST

117 N 8TH ST is a 8-story building in Center City Philadelphia with 95% of its floor area within daylight reach of a facade. This screen estimates 63 homes and scores it 84 out of 100 for office-to-residential conversion suitability.

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

117 N 8TH ST — 95% of each floor sits within daylight reach of a facade. The hatched area is windowless core: 463 sq ft per floor that must be renovated but can never be rented as an apartment. Deepest interior point: 41 ft from the nearest window.

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

Every floor carries 463 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment. Across 7 residential floors that is 3,244 sq ft of cost carrying no revenue.

Modeled conversion metrics for 117 N 8TH ST, 2026-09-15.
Suitability scoreStrong candidate	84 / 100
Storiesfrom 127 ft LiDAR height ÷ 12 ft floor-to-floor	8
Floor plateper floor, from the city footprint	8,958 sq ft
Daylight efficiencyshare within 35 ft of a facade	95%
Deepest interior pointviability threshold is 80 ft	41 ft
Windowless coreper floor — renovated but never rentable	463 sq ft
Estimated homesat 750 sq ft average	63
Conversion cost$360/sq ft all-in on 62,705 sq ft	$22.6M
Gap before grantshortfall against completed value	$10.2M
Modeled RESIDE grantbelow the statutory cap	$3.8M
ZoningCenter City Philadelphia	CMX4
Opportunity Zonecensus tract 42101000200, 2018 designation	Yes

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.