4-unit residential new construction, zoned RM1.
A 4-unit residential building is set to rise at 4226 Otter St in University City & Powelton, the kind of by-right infill quietly reshaping the block. It was cleared to build in Sep 18, 2026.
The 1,588 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 $170K. The plans call for new construction of a three-story building with basement and private roof deck/pilot house for use as four (4) dwelling units as per approved plans. work to include underpinning to be monitored by a pa licensed pe at all times. building to be fully sprinklered. *2018 ibc review* **separate permits required for mep & fire suppression work**.
The owner of record is 4 Castle 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 212 units of new supply — including the 10-unit project at 893 Belmont Ave, the 10-unit project at 4129 Ogden St, the 9-unit project at 4408 Lancaster Ave. 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 103 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 103 nearby opportunities →Major (8+ unit) new-construction projects filed within a half-mile since 2022 — the density gathering around this site.