370-unit residential new construction, zoned CMX3.


A seven-story, 370-unit development is cleared to build at 1401 South Christopher Columbus Boulevard, where South Christopher—the owner of record since 2017—plans to combine modular construction above a base of traditional Type I-A concrete. The project occupies a 7.7-acre lot along the riverfront at the boundary of Bella Vista and Queen Village, taking advantage of CMX3 by-right zoning that allows substantial density without special approvals. The structure will house 315 dwelling units along with ground-floor commercial shells that require separate fit-out permits before they can open, plus an accessory parking garage threaded through the lower levels.
The construction strategy is unusual: floors one and two will rise as traditional Type I-A concrete, while the upper five stories will be modular Type III-A units built off-site and stacked atop the podium. That upper portion requires fire-retardant studs and sheathing, and the whole building will be fully sprinklered under NFPA 13 standards with standpipes running vertically. The modular components carry third-party approval from PFS Corporation under Pennsylvania DCED regulations, a nod to the speed and cost discipline that prefabrication can bring to midrise multifamily.
The site sits on a stretch of Columbus Boulevard that has seen scattered residential conversions and small-scale condo projects, but nothing approaching this density in recent memory. With 370 units on a single parcel and no comparable multifamily projects within a half-mile radius, this development represents a significant tilt toward rental or condo supply in a corridor that has long been underbuilt relative to its waterfront access and transit proximity. South Christopher's willingness to commit nearly eight acres to this scale of housing—cleared to start in late 2021—suggests confidence that the riverfront can absorb hundreds of new households without cannibalizing pricing or lease-up.
Whether this becomes a catalyst for adjacent parcels depends largely on how quickly the project delivers and how the market absorbs that volume. The zoning is permissive, the lot is enormous by neighborhood standards, and the modular approach should compress timelines if construction moves forward as planned. If the economics prove out, other sizable riverfront holdings in the area may start to look more attractive for similar plays, particularly as developers grow comfortable with hybrid podium-and-modular typologies that squeeze more units from mid-rise envelopes.
As this density arrives, InvestPHL is tracking 18 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.
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