2026 assessment
$221K
OPA value, not a listing price
House report
4801 Knorr St
3 bd1 ba2 stories2,258 sqftRSA3built 1920
Property at a glanceHouse
Owner-occupancy signal
ZIP 19135 area
Tacony · Wissinoming
4800 block of Knorr St
Open L&I record
Open City history ↗2 violation rows marked OPEN in 1 active case
The actual City titles, code sections, case posture, and latest recorded inspections are shown here instead of only an aggregate count.
Case 677627
IN VIOLATION - COURTUnsafe structure case
- Unsafe Structure
PM15-108.1 - Exterior Struct Unsafe Cond 7
PM15-304.1G
OPEN is the status in the fetched L&I file, not a new inspection by BlockReport. Read the notice for the cited condition and required correction, then verify the live case with L&I.
Assessment and City record timeline
Published City assessments for this house against its block and ZIP. Dated City filings are marked on the same line. Select one to read it. Assessments are tax-roll values, not sale prices or appraisals.
- OPA assessment · 2016$180K 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$180K 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$180K 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$191K 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$140K 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$140K 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$140K 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$183K 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$183K 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$221K 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$221K 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$236K 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 · 2016-12-22PlumbingThis 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 · 2026-07-23Commercial Make Safe PermitThis 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 · 2014-06-25DRAINAGE-DOWNSPOUT CONNECTA 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 · 2014-06-25EXT S-EXTERIOR REPAIR/MAINTAINA 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 · 2014-06-25EXT S-WINDOW REPAIR/MAINTAIN (Repair or maintain exterior windows)Repair or maintain exterior windowsHow L&I violations and orders work ↗
- Inspection · 2014-06-25HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- L&I violation · 2015-03-05EXT S-WALLS REPAIR/MAINTAINA 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 · 2015-03-05EXT S-WINDOW REPAIR/REPLACE (Repair or replace exterior windows)Repair or replace exterior windowsHow L&I violations and orders work ↗
- L&I violation · 2015-03-05DRAINAGE-DOWNSPOUT CONNECTA 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 · 2015-03-05HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2015-03-05HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- L&I violation · 2019-03-26UNSAFE STRUCTUREA 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 · 2019-03-26EXTERIOR STRUCT UNSAFE COND 7A 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 · 2014-07-30HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2014-10-08HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2015-01-26PRECOURT (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 · 2015-02-06PRECOURT (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 · 2019-03-19HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2019-03-25CSUINITIALA 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 · 2019-03-25CSUINITIALA 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 · 2019-06-07CSUINITIALA 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 · 2019-06-14CSUINITIALA 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 · 2021-02-11L&I investigationA 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 · 2023-07-28L&I investigationA 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 · 2025-01-13L&I investigationA 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 · 2025-05-22L&I investigationA 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 · 2025-08-13L&I investigationA 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 · 2025-11-24L&I investigationA 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 · 2026-03-05L&I investigationA 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 ↗
- Appeal · 2015-06-17RB_LIRBA challenge or request reviewed through a City appeals process. Filing an appeal does not show who prevailed; read the decision, conditions, and related permit or violation.How Philadelphia L&I appeals work ↗
Property assessmentBlock median & rangeZIP 19135 (Tacony · Wissinoming) medianAssessmentL&I violationAppealPermitInspection
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 record30 events · exact dates, newest first
- PermitCommercial Make Safe Permit
- InspectionL&I investigation
- InspectionL&I investigation
- InspectionL&I investigation
- InspectionL&I investigation
- InspectionL&I investigation
- InspectionL&I investigation
- InspectionL&I investigation
- InspectionCSUINITIAL
- InspectionCSUINITIAL
- L&I violationUNSAFE STRUCTURE
- L&I violationEXTERIOR STRUCT UNSAFE COND 7
- InspectionCSUINITIAL
- InspectionCSUINITIAL
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- PermitPlumbing
- AppealRB_LIRB
- L&I violationEXT S-WALLS REPAIR/MAINTAIN
- L&I violationEXT S-WINDOW REPAIR/REPLACE (Repair or replace exterior windows)
- L&I violationDRAINAGE-DOWNSPOUT CONNECT
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionPRECOURT (likely: pre-court compliance inspection)
- InspectionPRECOURT (likely: pre-court compliance inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationDRAINAGE-DOWNSPOUT CONNECT
- L&I violationEXT S-EXTERIOR REPAIR/MAINTAIN
- L&I violationEXT S-WINDOW REPAIR/MAINTAIN (Repair or maintain exterior windows)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
Flags: 2 L&I violation rows marked OPEN · $31K recorded in the June 2022 delinquency snapshot; verify current balance · historical tax ledger through 2016 recorded $15K with a lien entry · 1 zoning/board appeal on record. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$3,098/year estimated property tax
2026 taxable assessment $221,300 × 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 $235,500. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 4120214002026 taxable assessment equals the full assessed value.
Historical delinquency sources Record found
$30,784.24 was recorded for this parcel in Philadelphia's June 2022 delinquency snapshot for 2011–2021. That amount may have been paid, reduced, or increased since; it is not a current payoff figure.
$17,496.37 principal$9,427.68 interest$1,311.65 penalty$2,548.54 other charges
The snapshot’s 2022 context used $140,000 total assessment, $140,000 taxable, and $0 exempt/abated. Those historical fields can differ from today’s OPA exemption status.
A separate historical parcel ledger ending in 2016 records $15,253.24 and a lien entry. It is shown as historical context only.
2011$2,582.90 total · $1,203.19 principal · $559.48 interest · $84.22 penalty2012$1,935.15 total · $1,249.56 principal · $468.58 interest · $87.47 penalty2013$1,880.43 total · $1,294.46 principal · $368.92 interest · $90.61 penalty2014$3,183.13 total · $2,305.34 principal · $449.54 interest · $161.37 penalty2015$2,963.20 total · $2,305.34 principal · $242.06 interest · $161.37 penalty2016$2,708.43 total · $2,408.22 principal · $36.12 interest · $24.08 penalty
For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”
The property, on paper
OPA physical field record.
Bedrooms
3
Bathrooms
1
Stories
2
Interior
2,258 sqft
livable area
Lot
2,312 sqft
Basement
Basement
city code J
Heat
Undetermined
city code H
Central air
No
Exterior condition
Below average
city code 5
Above averageBelow average
Interior condition
Average
city code 4
Above averageBelow average
Quality grade
C+
assessor's grade
ABCDE
Zoning
RSA3
city zoning code
Zoning appeals
1
CLOSED · City affirmed · 2015
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
4800 block of Knorr St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 4803 Knorr St · 4805 Knorr St
L&I licenses checked through Jul 23, 2026
No business or residential license records
No business license or residential registration matched this OPA parcel in the latest City data.
Open every source row 30 dated rows
- PermitCommercial Make Safe Permit
Permit CP-2026-004051 · Issued
FOR THE STRUCTURAL REPAIR TO EXTERIOR WALL TO RESOLVE CASE #677627. A SEPARATE PERMIT IS REQUIRED FOR ANY ADDITIONAL ALTERATIONS THAT ARE NOT SPECIFICALLY ADDRESSED ON CASE #677627.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationCSUINITIAL
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationCSUINITIAL
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationUNSAFE STRUCTURE
Case 677627 · Violation 211960164 · Code PM15-108.1 · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- ViolationEXTERIOR STRUCT UNSAFE COND 7
Case 677627 · Violation 211960165 · Code PM15-304.1G · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- InvestigationCSUINITIAL
Case 677628 · CLOSED
City marked the record closed; open the case for the closing reason.
- InvestigationCSUINITIAL
Case 677627 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 467926 · PASSED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked passed.
- PermitPlumbing
Permit 745593 · COMPLETED
REPLACE 3/4" WATER SERVICE-PA1#20163551427-"SELF-CERTIFICATION'S ARE NO LONGER PERMITTED" - "ALL EXCAVATIONS AND PLUMBING TRENCHES IN EXCESS OF 5 FEET IN DEPTH MUST HAVE APPROVED SHORING IN PLACE AT THE TIME OF INSPECTION"
- AppealRB_LIRB
Appeal 25158 · CLOSED · City affirmed
Related permit 467926 · FINES IMPOSED ARE OUT OF CONTROL FOR A PROPERTY THAT IS NOT HAZARDOUS. STORE FRONT BOARDED PRIOR TO PURCHASE DUE TO VANDALISM/BROKEN WINDOWS WHICH WERE REPLACED TO NO AVAIL. CURRENTLY, POLICE REPORTS ON FILE. THIS IS A RESIDENTIAL PROPERTY,
- ViolationEXT S-WALLS REPAIR/MAINTAIN
Case 467926 · Violation 3487707 · Code PM-304.3/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationEXT S-WINDOW REPAIR/REPLACE (Repair or replace exterior windows)
Case 467926 · Violation 3487708 · Code PM-304.8/16 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationDRAINAGE-DOWNSPOUT CONNECT
Case 467926 · Violation 3487706 · Code PM-302.4/6 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 439199 · PASSED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked passed.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 467926 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 439199 · CLOSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. City marked the record closed; open the case for the closing reason.
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 439199 · 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.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 439199 · CLOSED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. City marked the record closed; open the case for the closing reason.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 439199 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationDRAINAGE-DOWNSPOUT CONNECT
Case 439199 · Violation 3465769 · Code PM-302.4/6 · RESOLVE
- ViolationEXT S-EXTERIOR REPAIR/MAINTAIN
Case 439199 · Violation 3465770 · Code PM-304.1/1 · RESOLVE
- ViolationEXT S-WINDOW REPAIR/MAINTAIN (Repair or maintain exterior windows)
Case 439199 · Violation 3465771 · Code PM-304.8/1 · RESOLVE
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 439199 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
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 24, 2026, 9:01 AM 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)