2026 assessment
$778K
OPA value, not a listing price
Property report
151 N 21st St
Research this property with Analyst →2,772 sqftRM1built 1900
Property at a glanceApartment building
Ong Family LLC
2027 published assessment
$816K
Future roll, not the current tax bill
Location
100 block of N 21st St
ZIP 19103
Neighborhood area
Rittenhouse · Logan Square
Approximate · based on ZIP 19103
Assessment and City record timeline
The line tracks this property’s published City assessment. Markers show deeds, permits, inspections, licenses, violations, certifications, and appeals on their recorded dates. Select one to read the filing.
Assessments are tax-roll values, not sale prices or appraisals. OPA has published a 2027 assessment of $816,300. It is not yet the billed-year tax basis.
- OPA assessment · 2016$692K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2017$692K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2018$920K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2019$975K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2020$982K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2021$982K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2022$982K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2023$857K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2024$857K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2025$778K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2026$778K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2027$816K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- Permit · 2011-05-10ElectricalThis permit category usually covers electrical installation, alteration, replacement, or repair. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2012-11-27UseThis permit category usually covers the property’s allowed use, dimensions, occupancy, or site configuration. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-03-04DemolitionThis permit category usually covers partial or complete removal work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-03-15PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-04-11Major alterationA broad legacy permit work category for a substantial building alteration. It can include changed layouts, partitions, fixtures, finishes, structural work, or occupancy-related work, but only the approved scope and plans say what this permit actually authorized; separate trade permits may be required.What Philadelphia building permits can cover ↗
- Permit · 2013-05-24MechanicalThis permit category usually covers construction, repair, alteration, addition, or occupancy work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-05-31PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-08-02ElectricalThis permit category usually covers electrical installation, alteration, replacement, or repair. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-10-31SuppressionThis permit category usually covers fire-suppression systems or related life-safety work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2025-04-11Roof Covering ReplacementThis permit category usually covers construction, repair, alteration, addition, or occupancy work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- L&I violation · 2013-05-16HIST DIST-WINDOWS, DOORS ETCA dated L&I enforcement row. Read the cited code, required correction, status, and later inspections together; the title alone does not establish the property’s current condition.How L&I violations and orders work ↗
- Inspection · 2013-05-16BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- L&I violation · 2013-10-03LISTED CONDIT DOES NOT COMPLYA dated L&I enforcement row. Read the cited code, required correction, status, and later inspections together; the title alone does not establish the property’s current condition.How L&I violations and orders work ↗
- L&I violation · 2013-10-11WORKMANLIKE- BUILDING CODEA dated L&I enforcement row. Read the cited code, required correction, status, and later inspections together; the title alone does not establish the property’s current condition.How L&I violations and orders work ↗
- Inspection · 2013-10-11BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- Inspection · 2013-08-01BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- Inspection · 2013-12-27PRECOURT (likely: pre-court compliance inspection)A follow-up before or during enforcement escalation; confirm the case sequence in the City file.What Philadelphia inspections check ↗
- Inspection · 2014-01-06PRECOURT (likely: pre-court compliance inspection)A follow-up before or during enforcement escalation; confirm the case sequence in the City file.What Philadelphia inspections check ↗
- Inspection · 2017-10-24BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- License · 2014-03-31ONG FAMILY LLC (ONG FAMILY LLC): Rental landlord or residential registration initially issuedA City license record tied to an activity or property use. Its issue, expiration, inactive, and status fields—not the category alone—show what was recorded for this date.Philadelphia L&I licenses and property records ↗
- License · 2014-03-31VASILIOS G PAPPAS: Rental landlord or residential registration marked inactiveA City license record tied to an activity or property use. Its issue, expiration, inactive, and status fields—not the category alone—show what was recorded for this date.Philadelphia L&I licenses and property records ↗
- License · 2018-04-29ONG FAMILY LLC (ONG FAMILY LLC): Rental landlord or residential registration marked inactiveA City license record tied to an activity or property use. Its issue, expiration, inactive, and status fields—not the category alone—show what was recorded for this date.Philadelphia L&I licenses and property records ↗
- License · 2004-03-22VASILIOS G PAPPAS: Rental landlord or residential registration initially issuedA City license record tied to an activity or property use. Its issue, expiration, inactive, and status fields—not the category alone—show what was recorded for this date.Philadelphia L&I licenses and property records ↗
- Certification · 2024-05-17Fire Alarm CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
- Certification · 2025-04-17Fire Alarm CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
Property assessmentAssessmentL&I violationPermitInspectionLicenseCertification
Scroll horizontally to move through the years. Each icon sits on its recorded date; records without a day are labeled and centered within their year. Select one to explain the filing.
Highlight
Every dated record25 events · exact dates, newest first
- CertificationFire Alarm Certification
- PermitRoof Covering Replacement
- CertificationFire Alarm Certification
- LicenseONG FAMILY LLC (ONG FAMILY LLC): Rental landlord or residential registration marked inactive
- InspectionBP_BLDG
- LicenseONG FAMILY LLC (ONG FAMILY LLC): Rental landlord or residential registration initially issued
- LicenseVASILIOS G PAPPAS: Rental landlord or residential registration marked inactive
- InspectionPRECOURT (likely: pre-court compliance inspection)
- InspectionPRECOURT (likely: pre-court compliance inspection)
- PermitSuppression
- L&I violationWORKMANLIKE- BUILDING CODE
- InspectionBP_BLDG
- L&I violationLISTED CONDIT DOES NOT COMPLY
- PermitElectrical
- InspectionBP_BLDG
- PermitPlumbing
- PermitMechanical
- L&I violationHIST DIST-WINDOWS, DOORS ETC
- InspectionBP_BLDG
- PermitMajor alteration
- PermitPlumbing
- PermitDemolition
- PermitUse
- PermitElectrical
- LicenseVASILIOS G PAPPAS: Rental landlord or residential registration initially issued
Verify the public record
Property tax
$10,890/year estimated property tax
2026 taxable assessment $778,000 × 1.3998%. This is an estimate, not a bill or account balance. The City maintains payments, credits, interest, and the current amount due.
OPA has published a 2027 assessment of $816,300. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 8815524502026 taxable assessment equals the full assessed value.
Historical delinquency sources No current conclusion
This parcel did not match the June 2022 delinquency snapshot. That absence does not confirm the account is current today.
For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”
Where the record looks off
Conflicts in City paperwork. Flags on the data, not the property.
"Built 1900" is usually a placeholder
Philadelphia records use 1900 as a stand-in when the real construction year was never documented. Treat the age as unknown, not as 120+ years.
Property report
Commercial property
Apartment building, recorded in the City's multi-family category. The public record and owner trail follow.
What it is
Apartment building
Apts 5-50 Units Masonry
Owner
Ong Family LLC
$ / sq ft
$294
assessed value ÷ interior sqft
Corridor
Parkway/Logan Circle
city commercial corridor
Interior area
2,772 sqft
Lot size
1,467 sqft
Built
1900
Zoning
RM1
Recorded owner
Who's behind it
Ong Family LLC · corporate / LLC owner
• Tax bills mail to 2101 Market St, Philadelphia PA, 19103
Block context
100 block of N 21st St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 149 N 21st St · 153 N 21st St
L&I license dates · data through Jul 24, 2026
Business licenses at this address Latest pull
What L&I has registered at this OPA parcel, newest initial license date first.
No L&I business license is on record at this address in data through Jul 24, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
ONG FAMILY LLC (ONG FAMILY LLC)Inactive
Rental · Initial issue date Mar 31, 2014 · Terminal license date Apr 29, 2018
VASILIOS G PAPPASInactive
Rental · Initial issue date Mar 22, 2004 · Terminal license date Mar 31, 2014
A license is an L&I registration, not proof that a business is open, operating today, or located at this storefront. Dates are license dates. Events are deduped by parcel, business identity, and license type, so a renewal is not shown as another opening. Other permit and filing types remain in the full source ledger.
Open every source row 25 dated rows
- CertificationFire Alarm Certification
Certification BC-2025-010175 · Certified
Expires 2026-04-17
- PermitRoof Covering Replacement
Permit GM-2025-003125 · Expired
EZ PERMIT RE-ROOFING- For the Installation of New Roof Coverings on Existing Roofs as per attached standard. Deviations from these standards require submission of construction and site plans. Replacement of sheathing in excess of 10% of roof area shall not be applicable to the EZ permit process. Remove existing roofing down to wood decking, installation of recovery board to existing wood decking. installation of 060mil EPDM system, metal drip and scupper box
- CertificationFire Alarm Certification
Certification BC-2024-014512 · Certified
Expires 2025-05-17
- License terminal eventONG FAMILY LLC (ONG FAMILY LLC): Rental landlord or residential registration marked inactive
License 623422 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- InvestigationBP_BLDG
Case 416104 · PASSED
The cited inspection visit was marked passed.
- License issue eventONG FAMILY LLC (ONG FAMILY LLC): Rental landlord or residential registration initially issued
License 623422 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- License terminal eventVASILIOS G PAPPAS: Rental landlord or residential registration marked inactive
License 214299 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 380945 · PASSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. The cited inspection visit was marked passed.
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 380945 · FAILED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitSuppression
Permit 465782 · COMPLETED
FOR THE INSTALLATION OF A TWO (2) INCH FIRE SERVICE LINE W. BACKFLOW PREVENTOR (BFP) ASSEMBLY AND FOR INSTALLATION OF A FIRE SUPPRESSION SYSTEM AS PER NFPA 13R.
- ViolationWORKMANLIKE- BUILDING CODE
Case 448926 · Violation 2969366 · Code A-104.1/1 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- InvestigationBP_BLDG
Case 380945 · CLOSED
City marked the record closed; open the case for the closing reason.
- ViolationLISTED CONDIT DOES NOT COMPLY
Case 471257 · Violation 3017546 · Code A-501.1/5 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- PermitElectrical
Permit 471145 · COMPLETED
1 NEW 400AMP SVC W/7 NEW PANELS ;INTERIOR WIRING ;PLACE CABLE TV AND PHONE WIRES AS PER 2008 NEC
- InvestigationBP_BLDG
Case 380945 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitPlumbing
Permit 468787 · COMPLETED
1ST, 2ND AND 3RD INSTALL (2 WC, 2 LAV, 2 BATH TUBS, AND 2 KITCHEN SINKS)(MULTI FAMILY) PLANS NOT FOUND ISSEUD PER B. GLEDHILL
- PermitMechanical
Permit 471257 · COMPLETED
INSTALL 6-2 TON HEAT PUMP SYSTEMS WITH SUPPLY AND RETURN DUCTWORK. 6 OUT DOOR UNITS IN ALLEY WAY. ALL UNITS TO BE SELF-CONTAINED. NO PENETRATIONS THRU ASSEMBLIES.
- ViolationHIST DIST-WINDOWS, DOORS ETC
Case 380945 · Violation 3046139 · Code PM-704.2/4 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 380945 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitMajor alteration
Permit 448926 · COMPLETED
FOR ALTERATIONS WITH NO CHANGE IN OCCUPANCY CLASSIFICATION WITHIN AN EXIST. THREE (3) STORY RESIDENTIAL BUILDING TO INCLUDE INTERIOR PARTITIONS FOR SLEEPING, LIVING, KITCHEN, & UTILITY SPACES, ENCLOSURE OF EXIST. STAIRWAY WITH FIRE-RESISTANCE RATED CONSTRUCTION, INSTALLATION OF INTERVENING SPIRAL STAIRWAY @ NEW FLOOR OPENING, & INSTALLATION OF NEW WINDOW UNITS WITHIN EXISTING EXTERIOR OPENINGS; BUILDING TO BE FULLY SPRINKLERED. ALL WORK IN ACCORDANCE WITH PLAN APPROVED BY THE CITY OF PHILADELPHIA HISTORICAL COMMISSION DATED 03.01.13; NO CHANGE IN HEIGHT OR AREA OF EXISTING EXTERIOR OPENINGS PERMITTED HEREIN.
- PermitPlumbing
Permit 459426 · COMPLETED
INSTALL LATERAL & CURB TRAP INTO HOUSE, 1" WATER DIST (MULTIFAMILY) PA1 CALL#20130741413
- PermitDemolition
Permit 456590 · COMPLETED
INTERIOR DEMOLITION
- PermitUse
Permit 439892 · COMPLETED
USE REDUCTION TO A SIX FAMILY DWELLING IN AN EXISTING STRUCTURE.
- PermitElectrical
Permit 340035 · COMPLETED
REWIRE 1 ROOM AFTER FIRE, 4 RECEPTACLES, 1 SWITCH, 1 LIGHT FIXTURE & 1 SMOKE DETECTOR.
- License issue eventVASILIOS G PAPPAS: Rental landlord or residential registration initially issued
License 214299 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
Where this comes from
- Assessment, spec sheet & owner: OPA Property Assessments, Office of Property Assessment
- Sales & deed history: Realty Transfer Tax records, Recorder of Deeds
- Permits, violations & inspections: L&I Property History · Atlas
- Tax delinquency snapshot · June 2022: Real Estate Tax Delinquencies, Dept. of Revenue
- Historical tax ledger & liens · through 2016: Real Estate Tax Balances, Dept. of Revenue
- Current property-tax balance: Verify with Philadelphia Revenue
- Zoning appeals: L&I & Zoning Board appeals
- Neighborhood income & rents: US Census ACS 5-year estimates
- Historical mortgage rates: Freddie Mac Primary Mortgage Market Survey, annual averages
- Imagery: Street photo © Google · Aerial © Esri, Maxar
Methodology & freshness
This report was assembled Jul 25, 2026, 8:59 PM ET. Available City datasets are queried from OpenDataPhilly (phl.carto.com) and the cited City ArcGIS feeds; record queries paginate rather than silently taking a first page. For this property: Permits: queried · Violations: queried · Investigations: queried · Appeals: queried · Licenses: queried · Building certifications: queried. “Unavailable” means the source query failed or was not supplied, not “no record.” Reports re-pull on view after seven days and on an overnight rolling schedule; citywide benchmarks recompute weekly. Source dates still govern: the parcel-level tax-delinquency snapshot is June 2022 and the separate detailed tax ledger ends in 2016, so neither establishes today’s balance. The live balance and date-effective payoff must be verified in Tax Center. AI-written passages are grounded in the assembled record and rejected if they state a number the record does not hold.
Official city record ↗ · L&I history ↗ · See the whole block · Download this record (JSON)