Philadelphia · Hawthorne · #ZP-2025-010825
1101 Catharine St
1101 Catharine St, Hawthorne, PA · 47 homes, apartments
About this project
A one-story addition over an existing three-story structure will create a four-story apartment building with 47 dwelling units, a roof deck and 16 bicycle parking spaces.
Official description: FOR THE ERECTION OF A ONE-STORY ADDITION OVER AN EXISTING THREE (3) STORY STRUCTURE TO CREATE A FOUR-STORY STRUCTURE WITH A ROOF DECK ACCESSED BY ONE (1) ELEVATOR OVERRUN AND TWO (2) EXISTING ROOF DECK ACCESS STRUCTURES; FOR USE AS MULTI-FAMILY (FORTY-SEVEN (47) DWELLING UNITS) HOUSEHOLD LIVING AND SIXTEEN (16) ACCESSORY CLASS 1A BICYCLE PARKING SPACES LOCATED ALONG AN ACCESSIBLE ROUTE; SIZE AND LOCATION AS SHOWN ON THE PLAN. NO SIGN ON THIS PERMIT.
- Applicant
- 1101 CATHARINE LLC
- Contractor
- BLANK ROME LLP
- Plan type
- Building permit (new construction)
- Status
- Permit issued
Filing history
- 2025-11-03 · #ZP-2025-010825 · Building permit (new construction) · 47 lots/units
- 2025-05-04 · #ZP-2025-003827 · Zoning Board appeal (Variance) · 47 lots/units
The full picture AI research · Nov 1, 2026
The developer proposes to turn an existing three-story building at 1101 Catharine St, in Philadelphia's Hawthorne area, into a four-story apartment building. County records describe a one-story addition on top of the current structure. The finished building would hold 47 apartments.
The plans also include a roof deck and 16 bicycle parking spaces. The records don't say what the building is used for now.
No news coverage, developer project page, meeting agenda or hearing notice specific to this project was found online. Details such as rent levels, who will live there and any neighbor reaction are unknown. This explanation relies on the county filing alone.
What it could mean nearby
- 47 new apartments would add housing in the Hawthorne area of South Philadelphia.
- The 16 bicycle spaces suggest the plan expects some residents to travel by bike. The records don't mention car parking.
- Adding a floor to an existing building, rather than building new, keeps the footprint mostly unchanged.
Where it stands
The latest county filing is dated 2025-11-03, so the project is in the permit and review stage. Next steps usually include city zoning and building review, then permit issuance and construction if approved. No approval or hearing was found online.
- Nov 3, 2025 Latest county filing for the project
Want to weigh in? No hearing or comment process was found. Residents can contact the City of Philadelphia's planning and permitting offices, or their local neighborhood association, to ask whether any review is scheduled.
Who's behind it
1101 Catharine LLC · A project-specific company named on the county filing, alongside the law firm Blank Rome LLP. No further information about it was found.
Planning terms explained
- Addition
- New floor area built onto or on top of an existing building.
- Dwelling unit
- A single apartment or home with its own living, sleeping, cooking and bathroom space.
- Zoning
- City rules that control what can be built on a property and how large it can be.
- Roof deck
- An outdoor seating or gathering area built on top of a roof.
We searched the web for this project but found nothing beyond the county record, so this explanation is based on the filing alone. Researched by AI from public sources on Nov 1, 2026. It can make mistakes, so check the linked sources and the municipality before relying on it.
Scope estimate for contractors
Estimated construction value: $11.3M
- ~282 roofing squares
- ~47 HVAC systems
- ~47 kitchens / 94+ bathrooms
- ~47,000 sq ft of finished living space
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