20-unit residential new construction, zoned IRMX.
A six-story, 20-unit apartment building has been delivered at 3310 Fairmount Avenue, adding another modest-sized multifamily stack to University City's western edge. The project stands on a 3,512-square-foot lot and rises as a Type IA and IIIA hybrid structure with roof decks and sprinklered throughout. Cleared to build in late 2022, the building represents another straightforward by-right IRMX play—zoning that continues to shape this stretch of Fairmount into a corridor of mid-rise residential.
The owner of record, 4115brown LLC, acquired the site in 2022 and moved quickly to construction, reflecting the confidence that comes with a well-worn playbook in this part of town. With 20 units spread across six floors, the building is neither a luxury statement nor a sprawling complex—just efficient, density-minded infill that fits comfortably within the block's evolving character. The IRMX designation allows this kind of scale without special approvals, making it an attractive formula for developers who know the neighborhood's rental demand and want minimal friction on the approvals side.
This project doesn't exist in isolation. Within a half-mile radius, more than 300 new units are in various stages of planning and construction, including a 90-unit building next door at 3314-20 Fairmount and a cluster of 15- to 19-unit developments on nearby blocks. The area has become a proving ground for small- to mid-sized multifamily developers who see University City's institutional anchors and transit access as reliable demand drivers. The pace of activity suggests that any remaining low-slung parcels in IRMX zones are likely to face similar redevelopment pressure in the coming years.
What's notable here is how cleanly these projects are moving from acquisition to delivery. The 3310 Fairmount timeline—purchased in 2022, cleared to build within months, and now complete—shows a market that knows what it wants and how to get it built. For nearby property owners sitting on underused lots, the message is clear: the zoning allows it, the market absorbs it, and the money is willing to move quickly.
📄 View the project's plan drawings (PDF)As this density arrives, InvestPHL is tracking 13 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 13 nearby opportunities →Major (8+ unit) new-construction projects filed within a half-mile since 2022 — the density gathering around this site.