COMPANY RECORD · PHILADELPHIA, PA
Flatiron Building Company — permit history in Philadelphia, PA
Flatiron Building Company appears on 66 Philadelphia permit records from 2021 through 2026, most often building (90.9% of the record).
How Flatiron Building Company compares in Philadelphia
In 2025, Flatiron Building Company filed 12 building permits in Philadelphia — 18th of 1,085 companies named on building permits that year. Across all records since 2021, it ranks 21st of 3,139 with 60 building permits.
Ranked by the number of permits in the company's main category, among every company named on such permits in Philadelphia records — not only those with a page here. Companies with equal counts share a place. Filing volume measures activity, not quality.
Permit categories
| Category | Permits | Share |
|---|---|---|
| Building | 60 | 90.9% |
| Mechanical | 5 | 7.6% |
| Site / Utility Permit | 1 | 1.5% |
3 categories, as classified by the issuing authority. Small categories stay visible rather than being rounded away.
Activity by year
| Year | Permits issued |
|---|---|
| 2021 | 11 |
| 2022 | 14 |
| 2023 | 15 |
| 2024 | 7 |
| 2025 | 13 |
| 2026 | 6 |
Busiest year on record: 2023, with 15 permits. One project can account for several filings, so read this as filing activity rather than workload.
Names on the same project timelines
| Name in source | Linked permits | Last seen |
|---|---|---|
| Oliver Sprinkler Co., Inc. | 20 | 2025-08-14 |
| Palman Electric Inc | 17 | 2026-06-03 |
| Dwd Mechanical Contractor Inc | 11 | 2025-02-05 |
| Frank Fisher Inc | 9 | 2026-02-24 |
| Nagel Lavin Inc | 6 | 2026-01-25 |
| Chadwick Service Company | 6 | 2026-01-21 |
| Oreilly Edward B & Assoc Inc | 6 | 2026-03-06 |
| Robert Ford | 5 | 2024-01-16 |
| Hatzel & Buehler Inc | 4 | 2025-04-29 |
| Independence Fire Sprinkler Company | 4 | 2026-04-01 |
| Pmc Mechanical Enterprise, LLC | 4 | 2026-07-06 |
| Preferred Fire Protection Inc | 4 | 2024-05-03 |
33 named participants share a resolved project timeline with Flatiron Building Company. A shared timeline is a research lead, not proof of a partnership or a current contract. Names appear as the authority published them.
Where they worked
| Address in source | Most recent permit |
|---|---|
| 9600 STENTON AVE | 2026-10-23 |
| 3118-98 CHESTNUT ST | 2026-07-27 |
| 3600-90 WALNUT ST | 2026-06-15 |
| 174 DIAMOND ST | 2026-05-26 |
| 3600 CHESTNUT ST | 2026-05-05 |
| 312-38 ARCH ST | 2026-03-04 |
| 601 UNIVERSITY AVE | 2025-12-18 |
| 3002-24 MARIO LANZA BLVD | 2025-10-23 |
| 8000-02 LYONS AVE | 2025-10-23 |
| 500 OSLER CIR | 2025-10-14 |
| 501 OSLER CIR | 2025-10-14 |
| 3600 PINE ST | 2025-10-14 |
| 3905 SPRUCE ST | 2025-09-29 |
| 3300 CHESTNUT ST | 2025-05-29 |
39 distinct addresses on record; the 14 most recent are shown. Addresses appear as the authority published them. A permit is a filing at an address, not a completed job there.
Also named on permits at the same addresses
| Company | Shared addresses | Years |
|---|---|---|
| Oliver Sprinkler Co., Inc. | 12 | 2021–2026 |
| Palman Electric Inc | 9 | 2021–2026 |
| Hatzel & Buehler Inc | 8 | 2021–2026 |
| Independence Fire Sprinkler Company | 6 | 2021–2025 |
| Frank Fisher Inc | 6 | 2021–2026 |
| Pmc Mechanical Enterprise, LLC | 6 | 2021–2026 |
| West Chester Mechanical Contractors Inc | 6 | 2021–2025 |
| Robert Ford | 6 | 2021–2025 |
Companies that also appear in Philadelphia permit records at addresses where Flatiron Building Company filed, in any year. Sharing an address is a documented co-appearance, not proof that they worked on the same project or with each other.
Permits on record
66 permits; open the 50 most recent
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| SP-2026-001037 | 2026-10-23 | Site / Utility Permit | 9600 STENTON AVE | SITEWORK IN EXISTING ARBORETUM FACILITY TO INCLUDE NEW PEDESTRIAN PATH AND TERRACE AS PER APPROVED PLANS. *2021 IBC REVIEW* | |
| CP-2026-003349 | 2026-07-27 | Building | 3118-98 CHESTNUT ST | FOR LEVEL II ALTERATIONS TO 1ST FLOOR OF AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE PARTIAL DEMOLITION AND THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES/FURNISHINGS AND ACCE | |
| CP-2026-001887 | 2026-06-15 | Building | 3600-90 WALNUT ST | FOR A LEVEL II INTERIOR ALTERATIONS TO A PORTION OF AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES/FURNISHINGS, AND ACCESSIBILITY I | |
| CP-2026-000911 | 2026-05-26 | Building | 174 DIAMOND ST | FOR LEVEL II ALTERATIONS (WITH NO CHANGE OF OCCUPANCY) AT BASEMENT OF EXISTING BUILDING. SEPARATE PERMITS REQUIRED FOR MECHANICAL, ELECTRICAL AND PLUMBING. | |
| CP-2026-001134 | 2026-05-05 | Building | 3600 CHESTNUT ST | LEVEL II INTERIOR ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR RENOVATIONS TO EXISTING HIGHER EDUCATION FACILITY ART GALLERY AS PER APPROVED PLANS. *2018 IEBC REVIEW* AMENDED AS OF 8/ | |
| CP-2026-000780 | 2026-03-04 | Building | 312-38 ARCH ST | LEVEL II ALTERATIONS FOR THE INSTALLATION OF NEW MECHANICAL SYSTEM. FOR USE AS PREVIOUSLY APPROVED AS PER APPROVED PLANS. | |
| CP-2025-005340 | 2025-12-18 | Building | 601 UNIVERSITY AVE | FOR THE ERECTION OF TEMPORARY PARTITION AND EXTERIOR WALL OPENING AS PER APPROVED PLANS. | |
| CP-2025-003689 | 2025-10-23 | Building | 3002-24 MARIO LANZA BLVD | FOR LEVEL I INTERIOR ALTERATIONS WITHOUT A CHANGE IN USE AND OCCUPANCY CLASSIFICATION TO AN EXISTING ONE (1) STORY DETACHED STRUCTURE (BIN #1465606) CONTAINING TWENTY-FIVE (25) DWE | |
| CP-2025-003709 | 2025-10-23 | Building | 8000-02 LYONS AVE | LEVEL I ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR RENOVATIONS TO EXISTING EIGHTEEN (18) UNIT BUILDING AS PER APPROVED PLANS AND BBS VARIANCE NO. MI-2025-006476. EXISTING BUILDING FU | |
| CP-2025-003764 | 2025-10-14 | Building | 500 OSLER CIR | FOR LEVEL II ALTERATIONS TO BASEMENT LOCKER ROOM AND BREAKROOM IN AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES/FURNISHINGS AND AC | |
| CP-2025-003762 | 2025-10-14 | Building | 501 OSLER CIR | FOR LEVEL II ALTERATIONS TO AN EXISTING COMMERCIAL BUILDING FOR USE AS AN APARTMENT BUILDING (B OCCUPANCY), ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES | |
| CP-2025-004536 | 2025-10-14 | Building | 3600 PINE ST | FOR LEVEL II ALTERATIONS WITH NO CHANGE IN OCCUPANCY. SEPARATE PERMITS REQUIRED FOR MECHANICAL, ELECTRICAL, PLUMBING AND FIRE SUPPRESSION WORK. | |
| CP-2025-004156 | 2025-09-29 | Building | 3905 SPRUCE ST | FOR THE EXTERIOR BUILDING RESTORATION INCLUDING ROOFING/ MASONRY REPAIRS, WINDOW REPAIR AND REPLACEMENT, REPLACEMENT OF EXISTING FIRE ESCAPE, RECONFIGURATION OF EXISTING ADA RAMP, | |
| CP-2024-005105 | 2025-09-22 | Building | 174 DIAMOND ST | *ASBESTOS ABATEMENT REQUIRED PRIOR START OF WORK.* FOR REPAIRS AND ALTERATIONS TO AN EXISTING EDUCATION AND TRAINING CENTER (B, E, & A-3) INCLUDING FINISHES, ACCESSIBILITY UPGRADES | |
| CP-2025-003204 | 2025-08-06 | Building | 501 OSLER CIR | FOR A LEVEL I INTERIOR ALTERATIONS TO AN EXISTING LABORATORY SPACE (LAB #310B). BUILDING IS BE FULLY SPRINKLERED. ALL WORK TO BE DONE PER APPROVED PLANS. IF FIELD CONDITIONS VARY | |
| MP-2025-002380 | 2025-05-29 | Mechanical | 3300 CHESTNUT ST | FOR THE INSTALLATION OF REGISTERS, DIFFUSERS, AND APPLIANCES WITH ASSOCIATED DUCTWORK. APPLIANCES TO BE INSTALLED IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS. ALL WORK TO BE D | |
| CP-2025-001677 | 2025-05-23 | Building | 3800 WALNUT ST | LEVEL I EXTERIOR ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR REPAIRS TO EXISTING SITE WALLS AS PART OF AN EXISTING UNIVERSITY COMPLEX AS PER APPROVED PLANS. NO INTERIOR WORK ON THIS P | |
| CP-2025-000705 | 2025-03-05 | Building | 3300 CHESTNUT ST | LEVEL II ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR RENOVATIONS TO EXISTING GROUP LIVING FACILITY TO REPLACE EXISTING EXTERIOR FIRE STAIRWAY AND CREATE ACCESSIBLE TOILET ROOM ON THE | |
| CP-2024-006319 | 2025-01-30 | Building | 312-38 ARCH ST | FOR LEVEL II ALTERATION IN BASEMENT AT SPACE 003 FIRE-PUMP ROOM IN AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE THE PARTIAL DEMO OF AN EXISTING WALL AND THE ERECTION OF PARTITION | |
| CP-2024-004194 | 2024-09-30 | Building | 3401-99 SPRUCE ST | FOR A LEVEL II INTERIOR ALTERATIONS TO AN EXISTING TENANT SPACE LOCATED ON THE FIRST FLOOR LEVEL OF AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, P | |
| MP-2024-002642 | 2024-07-08 | Mechanical | 3501 CURIE BLVD | FOR THE INSTALLATION OF A NEW HVAC SYSTEMS, ASSOCIATED DUCT WORK, AND REGISTERS/DIFFUSERS AS PER APPROVED PLANS. SEPARATE PERMIT REQUIRED FOR ELECTRICAL, PLUMBING, FIRE SUPPRESSIO | |
| CP-2024-002366 | 2024-06-10 | Building | 3600 PINE ST | For level I interior alterations to the existing lab as shown on plans. Building is fully sprinklered. Separate permits required for MEP & FP work. | |
| CP-2024-002364 | 2024-06-04 | Building | 3501 CURIE BLVD | FOR LEVEL II ALTERATIONS TO AN EXISTING TENANT SPACE ON THE 6TH FLOOR LEVEL OF AN EXISTING STRUCTURE. ALL WORK TO BE DONE PER APPROVED PLANS. BUILDING IS FULLY SPRINKLERED. ** I | |
| CP-2024-002339 | 2024-05-28 | Building | 3600 PINE ST | FOR LEVEL 2 ALTERATIONS TO REPLACE ROOF AN TO ADD ROOF ACCESS AS PER PLANS. NO CHANGE IN OCUPANCY CLASSIFICATION. | |
| CP-2024-002343 | 2024-05-22 | Building | 3600-90 WALNUT ST | FOR LEVEL 2 ALTERATION TO REPLACE ROOF OF THE EXISTING DETACHED STRUCTURE AS PER PLANS. NO CHANGE IN OCCUPANCY CLASSIFICATION. | |
| CP-2024-002109 | 2024-04-22 | Building | 3600 LOCUST WALK | LEVEL II INTERIOR ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR RENOVATIONS TO SUITE 1000 IN AN EXISTING HIGHER EDUCATIONAL FACILITY (STEINBERG HALL/DIETRICH HALL) AS PER APPROVED PLANS | |
| CP-2023-001569 | 2023-12-01 | Building | 3406-46 WALNUT ST | For Level II Alterations within the bathrooms of an existing Group A-3 occupancy (Library) on the ground floor in an existing seven (7) story detached structure, as per plans; work | |
| CP-2023-005179 | 2023-11-06 | Building | 3800 SPRUCE ST | LEVEL II INTERIOR ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR RENOVATIONS TO EXISTING HIGHER EDUCATIONAL FACILITY (OLD VET QUAD, H-1) AS PER APPROVED PLANS. EXISTING BUILDING SPRINKLE | |
| CP-2023-005666 | 2023-10-16 | Building | 220-60 S 33RD ST | FOR A LEVEL I INTERIOR ALTERATIONS (NO CHANGE IN OCCUPANCY ) TO A PORTION OF AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE SELECTIVE DEMOLOTION AND REPLACEMENT OF EXISTING PARTITI | |
| CP-2023-004440 | 2023-10-11 | Building | 500 OSLER CIR | FOR LEVEL II ALTERATION TO THE EXISTING LAB ON THE 10TH FLOOR AS PER APPROVED PLANS. | |
| CP-2023-004987 | 2023-09-25 | Building | 500 OSLER CIR | FOR INTERIOR ALTERATIONS THROUGHOUT VARIOUS SPACES THROUGHOUT BASEMENT OF AN EXISTING STRUCTURE. FOR USE AS PREVIOUSLY APPROVED. AS PER APPROVED PLANS. *******SEPARATE PERMITS REQU | |
| MP-2023-003035 | 2023-08-10 | Mechanical | 2564 BELMONT AVE | FOR THE INSTALLATION OF REGISTERS, DIFFUSERS, AND APPLIANCE WITH ASSOCIATED DUCTWORK FOR A MULTI-FAMILY DWELLING. APPLIANCES TO BE INSTALLED IN ACCORDANCE WITH MANUFACTURER'S SPECI | |
| CP-2023-003453 | 2023-07-13 | Building | 2929 WALNUT ST | FOR A LEVEL II ALTERATIONS TO THE SECOND FLOOR LEVEL OF AN EXISTING STRUCRURE. ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES/FURNISHINGS THROUGHOUT. BUIL | |
| CP-2023-003510 | 2023-06-27 | Building | 501 OSLER CIR | FOR A LEVEL II INTERIOR ALTERATIONS TO A TENANT SPACE ON THE 7TH FLOOR LEVEL OF AN EXISTING STRUCTURE. ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES/FURN | |
| CP-2023-003058 | 2023-06-05 | Building | 3600 MARKET ST | FOR LEVEL 2 INTERIOR ALTERATIONAS TO CONVERT A JANITOR CLOSER TO A TOILET ROOM PER PLANS. | |
| CP-2023-001674 | 2023-05-03 | Building | 501 OSLER CIR | FOR LEVEL II ALTERATIONS PER APPROVED PLANS. SEPARATE PERMITS REQUIRED FOR MECHANICAL, ELECTRICAL AND PLUMBING. | |
| CP-2023-000418 | 2023-04-25 | Building | 2564 BELMONT AVE | FOR LEVEL II ALTERATIONS TO AN EXISTING FOUR STORY BUILDING FOR USE AS A RESIDENTIAL OCCUPANCY, ALTERATIONS TO INCLUDE THE INSTALLATION OF AN ELEVATOR AND ELEVATOR ENCLOSURE WITH C | |
| CP-2023-000405 | 2023-04-25 | Building | 2564 BELMONT AVE | AMENDMENT: FOR THE AMENDMENT OF PREVIOUSLY APPROVED PERMIT CP-2023-000405 TO DOCUMENT CHANGE IN UTILITY ROOMS AS SHOWN PER APPROVED PLANS. IF FIELD CODITIONS VARY CONTACT DESIGN PR | |
| CP-2023-000822 | 2023-04-11 | Building | 3401 GRAYS FERRY AVE | LEVEL II ALTERATIONS (NO CHANGE OF OCCUPANCY) FOR RENOVATIONS TO FIRST FLOOR OF AN EXISTING RESEARCH LAB BUILDING (BLDG 250) TO INSTALL AN MRI AND ASSOCIATED OFFICE SPACE AS PER AP | |
| CP-2022-006873 | 2023-02-20 | Building | 3600 MARKET ST | FOR LEVEL II ALTERATIONS TO INCLUDE THE ERECTION OF PARTITION WALLS, PROVIDE FINISHES/FURNISHINGS THROUGHOUT ON THIRD FLOOR (SUITE 300) OF AN EXISTING EDUCATIONAL FACILITY. ALL WOR | |
| CP-2022-005991 | 2023-01-03 | Building | 3500 PINE ST | FOR ALTERATIONS TO THE EXISTING STEMMLER BUILDING (G-15) TO INCLUDE WALL/FLOOR/CEILING FINISHING AND STRUCTURAL REINFORCEMENTS. (IEBC 2018, WORK-AREA METHOD, LVL I ALTERATIONS) **S | |
| CP-2022-001887 | 2022-12-05 | Building | 701-15 N BROAD ST | ALTERATION TO INCLUDE STRUCTRUAL REPAIR TO AN ABANDONED UNDERGROUND VAULT AS PER APPROVED PLANS. | |
| CP-2022-005831 | 2022-11-28 | Building | 4000 LOCUST ST | FOR LEVEL II INTERIOR ALTERATIONS TO SPACE #427 WITH NO CHANGE IN USE & OCCUPANCY CLASSIFICATION. ALL WORK TO BE DONE PER APPROVED PLANS AND IN ACCORDANCE WITH 2018 IEBC. EXISTING | |
| CP-2022-006414 | 2022-11-23 | Building | 3601-51 WALNUT ST | LEVEL II ALTERATIONS WITH PARTIAL CHANGE OF OCCUPANCY TO CREATE AN ADMINISTRATIVE OFFICE ON THE SECOND FLOOR OF AN EXISTING BUILDING AS PER APPROVED PLANS. EXISTING BUILDING FULLY | |
| CP-2022-003474 | 2022-11-01 | Building | 8600 RIDGE AVE | FOR THE DEMOLITION OF EXISTING WIND BREAKS AND ERECTION OF NEW ENTRANCE VESTIBULE. FOR INTERIOR AND EXTERIOR ALTERATION WITH ACCESSIBILITY IMPROVEMENT . ALL WORK TO BE DONE PER A | |
| CP-2022-004398 | 2022-10-19 | Building | 3301 SOLLY AVE | FOR LEVEL II INTERIOR ALTERATIONS TO TOILET ROOMS IN AN EXISTING GROUP E EDUCATIONAL FACILITY. ALL WORK TO BE DONE PER APPROVED PLANS AND IN ACCORDANCE WITH 2018 IEBC. SEPARATE PER | |
| MP-2022-002719 | 2022-06-06 | Mechanical | 3500 PINE ST | FOR ALTERATIONS TO THE EXISTING HVAC SYSTEM AS PER PLANS. | |
| CP-2022-001101 | 2022-05-19 | Building | 3600 PINE ST | INTERIOR ALTERATION TO AN EXISTING STRUCTURE AS PER APPROVED PLANS. A SEPARATE PERMIT IS REQUIRED FOR ALL OTHER WORK. | |
| CP-2022-001821 | 2022-05-13 | Building | 3600-90 WALNUT ST | FOR EXTERIOR LEVEL 2 ALTERATIONS TO EXISTING STRUCTURE AS PER PLANS. | |
| CP-2022-001059 | 2022-04-21 | Building | 220-60 S 33RD ST | FOR EXTERIOR WORK ONLY FOR A ROOF REPLACEMENT FOR AN EXISTING STRUCTURE. WORK TO BE PERFORMED PER APPROVED PLANS. IF FIELD CONDITIONS VARY CONTACT DESIGN ENGINEER PRIOR TO THE STA |
Fields appear as the issuing authority published them, including spelling and blanks. Scope text is the applicant's description of intended work, not an inspection finding.
Search these records
The 66 permits above are a static record through 2026. Select a year above to open that year’s records, or search Flatiron Building Company in Philadelphia, PA by address, trade or date range.
Source and limits
Public Philadelphia permit records through 2026, counted by distinct permit number. This is a historical filing record: it cannot show current backlog, pricing, crew availability, licensing or insurance, and a quiet period may only mean work was filed elsewhere. Confirm anything commercial with the company and with the issuing authority before acting. How we build these records, and what we withhold →
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