736 ARCH ST

736 ARCH ST is a 7-story building in Center City Philadelphia with 97% of its floor area within daylight reach of a facade. This screen estimates 129 homes and scores it 91 out of 100 for office-to-residential conversion suitability.

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

736 ARCH ST — 97% of each floor sits within daylight reach of a facade. The hatched area is windowless core: 640 sq ft per floor that must be renovated but can never be rented as an apartment. Deepest interior point: 39 ft from the nearest window.

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

Every floor carries 640 sq ft of windowless core — area that must be gutted, re-plumbed and sprinklered but can never be rented as an apartment. Across 6 residential floors that is 3,841 sq ft of cost carrying no revenue.

Modeled conversion metrics for 736 ARCH ST, 2026-09-15.
Suitability scoreStrong candidate	91 / 100
Storiesfrom 119 ft LiDAR height ÷ 12 ft floor-to-floor	7
Floor plateper floor, from the city footprint	20,865 sq ft
Daylight efficiencyshare within 35 ft of a facade	97%
Deepest interior pointviability threshold is 80 ft	39 ft
Windowless coreper floor — renovated but never rentable	640 sq ft
Estimated homesat 750 sq ft average	129
Conversion cost$360/sq ft all-in on 125,191 sq ft	$45.1M
Gap before grantshortfall against completed value	$19.7M
Modeled RESIDE grantbelow the statutory cap	$7.7M
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.