4-unit residential new construction, zoned RM1.
A 4-unit residential building is set to rise at 4021 Brown St in University City & Powelton, the kind of by-right infill quietly reshaping the block. It was cleared to build in Sep 20, 2025.
The 1,440 sq ft site is zoned RM1, which supports a building on the order of 3 stories by right. Records show the parcel last traded in 2025 for $105K. The plans call for new construction of a three (3) story building with cellar, front porch, two (2) private roof decks with pilot houses for use as four (4) dwelling units as per approved plans. building to be fully sprinklered per nfpa 13. *2018 ibc review* **separate permits required for mep & fire suppression work** amendment approved 6/14/26 amend new construction permit cp-2025-003710 for changes to basement layout as per approved plans. .
The owner of record is Thedoor LLC. The project's plan drawings are on file — worth a look for anyone underwriting the surrounding block.
It isn't rising in isolation. Within a half-mile, 12 other major projects have broken ground since 2022 — roughly 153 units of new supply — including the 12-unit project at 748 N 40th St, the 9-unit project at 865 N 40th St, the 9-unit project at 871 N Preston St. That kind of concentration is exactly what pulls land values, and buyer attention, toward a block.
We'll update this page as the project progresses — leasing, retail tenants, renderings, and construction milestones as they surface. The relevant question for investors and agents: what are the surrounding parcels worth to a builder now that this is coming?
📄 View the project's plan drawings (PDF)As this density arrives, InvestPHL is tracking 94 under-built parcels within a half-mile that a developer could still acquire and build — each carrying a builder's max bid. Addresses and figures are members-only.
Unlock the 94 nearby opportunities →Major (8+ unit) new-construction projects filed within a half-mile since 2022 — the density gathering around this site.