4-unit residential new construction, zoned RM1.
A 4-unit residential building is set to rise at 4229 Otter St in University City & Powelton, the kind of by-right infill quietly reshaping the block. It was cleared to build in Aug 21, 2026.
The 1,689 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 for the new construction of a three (3) story building with a basement, roof deck and roof deck access structure for the use of r2 occupancy (4 dwelling units). if field conditions vary contact design engineer prior to the start of any work. all work to be done per approved plans. separate permits required for all other 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 111 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 111 nearby opportunities →Major (8+ unit) new-construction projects filed within a half-mile since 2022 — the density gathering around this site.