115 S 19th StUnder construction

A 265-unit residential building is set to rise at 115 S 19th St in Rittenhouse, one of the larger new-construction projects underway in Philadelphia this cycle. It was cleared to build in Apr 9, 2021.

The 76 sq ft site is zoned CMX5, which supports a building on the order of 30 stories by right. The parcel last changed hands in 2022. The plans call for **amendment dated 9/5/2026: to revise layout of cellar level and add partial level 45 as per approved plans. **amendment dated 09/11/2025: to reduce number of stories from 54 to 44, to increase the number of dwelling units from 215 to 265, and to change layout and design of floors to include additional balconies and roof decks accessed from individual dwelling units, as per amendments to zp-2021-002518 from 5/13/2023 to 3/7/2025, and for appropriate changes to structural plan, including switching from mat foundation to deep foundation.** **amendment dated 09/12/2022: including alterations to facades of 113-19 s 19th st (no work to exterior facades of 121 s 19th st), changing from deep foundation to mat foundation based on revised geotech report and foundation plans, changes to required special inspections and to special inspection agency (w/o change to dprc-si), and no other changes to previously approved work.** **amendment dated 12/28/2021: changes to number of stories, reconfigurations of floors, new third elevator, as per revised plans, permit language updated below to reflect changes, documented payment to dpd for mixed-income zoning bonus** for the erection of a new, fifty-four (54) story, high-rise attached structure, within and above existing three (3)-to-four (4) story attached structures across multiple properties joined as part of a unity-of-use agreement (113-21 s 19th street and 1822-24 chestnut street), with existing facades on s 19th street to remain, to be used as groups a-3/r-2/u (lobby w/accessory storage & utilities at 1st floor, tenant amenity spaces at 2nd-3rd & 5th floors, 215 residential units at 4th-28th and 30th-53rd floors, vacant tenant spaces at 1st-2nd floors (separate use registration permit and fit-out/co permits required prior to occupancy), mechanical space only at 29th floor and penthouse), as per plans; separate permits required for all mep/fsp work; sprinklers to be installed throughout as per nfpa 13 and standpipes w/in exit s.

The owner of record is 19s Partners 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, 2 other major projects have broken ground since 2022 — roughly 205 units of new supply — including the 84-unit project at 1813 Ranstead St, the 121-unit project at 2012-14 Chestnut St. 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?