Market Insights  /  Northern Liberties
Development Watch · Northern Liberties

817-21 N 3rd StDelivered

48-unit residential new construction, zoned IRMX.

A 48-unit residential building is set to rise at 817-21 N 3rd St in Northern Liberties, a mid-scale addition to one of the city's busier development corridors. It was cleared to build in Sep 9, 2021.

The 14,829 sq ft site is zoned IRMX, which supports a building on the order of 6 stories by right. Records show the parcel last traded in 2021 for $2.9M. The plans call for amendment ii: for the amendment of previously approved permit cp-2020-005959 to document change in egress layout as shown per approved plans. if field conditions vary contact design professional prior to the start of any work. separate permits to be obtained for all other work. amendment i: for the amendment of previously approved permit cp-2020-005959 to document change in construction for the conversion from concrete slab on steel deck to cast in place concrete from the foundation through second floor level. work to also include the replacing tji's with typical lumber joists as shown per structural plans sealed by professional engineer. all work to be done per aproved plans. if field conditions vary contact design engineer prior to the start of any work. separate permits to be obtained for all other work. original: for the erection of an attached six story structure with a roof deck accessed by a pilothouse. structure for use a vacant commercial space( separate use permit and fitout to be obtained prior to occupancy) at first floor, for a multi-family household living ( fourty-eight(48) dwelling units from second floor through 6th floors with accessory thirty-six(36)parking spaces in the basement level, and twenty(20) bicycle spaces in an accessible route. building composed of two different construction types (type ia(basement-first floor level) and type iiib construction (third-sixth floor level). building is fully sprinklered in accordance with nfpa 13 and standpipes to be provided in the exit stairways per nfpa 14. all work to be done per approved plans. if field conditions vary contact design engineer prior to the start of any work. **a covered walkway or sidewalk closure shall be required within 15 feet of the building facade in accordance with section 3306 of the 2018 ibc. separate building and/or streets department permit required prior to the start of any work. *** fire watch is required once combustible construction is over 40 feet in height, .

The owner of record is 817n3 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, 8 other major projects have broken ground since 2022 — roughly 681 units of new supply — including the 55-unit project at 828-40 N 2nd St, the 10-unit project at 1139-41 N 3rd St, the 97-unit project at 500 N Christopher Columbus Blvd. 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)
Schematic massing — illustrative of the ~6-story by-right envelope, not the developer's design.
Units
48
Zoning
IRMX
By-right envelope
~6 stories
Lot
14,829 sq ft
Last sale
$2.9M · 2021
Cleared to build
Sep 9, 2021
For developers & investors

Underpriced parcels near this project

As this density arrives, InvestPHL is tracking 105 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.

~328buildable units
████████ Street
CMX4 · 0.48 mi away
Max bid to a builder $23M · Opportunity Score 100
Unlock →
~88buildable units
████████ Street
CMX3 · 0.41 mi away
Max bid to a builder $6.1M · Opportunity Score 100
Unlock →
~71buildable units
████████ Street
CMX3 · 0.23 mi away
Max bid to a builder $5.0M · Opportunity Score 100
Unlock →
~119buildable units
████████ Street
CMX3 · 0.23 mi away
Max bid to a builder $8.3M · Opportunity Score 100
Unlock →
~81buildable units
████████ Street
CMX3 · 0.27 mi away
Max bid to a builder $5.6M · Opportunity Score 100
Unlock →
Unlock the 105 nearby opportunities →
The block

What else is rising nearby

Major (8+ unit) new-construction projects filed within a half-mile since 2022 — the density gathering around this site.

55u828-40 N 2nd St0.07 mi
10u1139-41 N 3rd St0.33 mi
97u500 N Christopher Columbus Blvd0.36 mi
166u310 W Girard Ave0.38 mi
84u130 W Girard Ave0.43 mi
84u130 W Girard Ave0.43 mi
78u1000-10 N Delaware Ave0.45 mi
107u1122 Frankford Ave0.48 mi
Progress

How this project is moving

Cleared for occupancy ~100% complete
Estimated from the construction permit sequence — an approximation of stage, not a precise schedule.
Every logged milestone appears here — highlighted ones are the headline stages; the rest track interim construction activity. Checked daily.
Compiled by InvestPHL. Unit counts, scope, and ownership are as recorded and subject to revision; the massing figure is a schematic illustration of the by-right envelope, not the developer's design or a marketing rendering. Verify zoning, status, and title with counsel before acting. InvestPHL does not list, market, or represent any property, buyer, or seller.