2026 assessment
$216K
OPA value, not a listing price
House report
4510 Knorr St
3 bd1 ba2 stories1,381 sqftRSA3built 1935
Property at a glanceHouse
Owner-occupancy signal
ZIP 19135 area
Tacony · Wissinoming
4500 block of Knorr St
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$112K 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$112K 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$112K 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$123K 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$128K 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$128K 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$128K 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$172K 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$172K 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$216K 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$216K 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$217K 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 ↗
- Deed / sale · 2019Deed / sale $150KA recorded real-estate document or transfer event. The amount and date can be useful history, but the underlying deed and transfer-tax filing control the parties, consideration, and legal effect.How to read the recorded document ↗
- L&I violation · 2011-02-07SIGNS - PUBLIC PROPERTYA 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 · 2011-02-07SIGNS - AFFIXED TO TREESA 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 · 2011-02-07SIGN-IMMINENTLY DANGEROUSA 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 · 2011-02-07SIGNS - NO PERMITA 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 · 2011-02-07SIGN-UNSAFEA 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 · 2013-10-16VUPD-GRAFFITIA 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 · 2013-10-16EXT-GRAFFITIA 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 · 2013-10-16GRAFFITIA 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 · 2013-10-16VUPD-EXT-GRAFFITIA 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 ↗
Property assessmentBlock median & rangeZIP 19135 (Tacony · Wissinoming) medianAssessmentDeed / saleL&I violation
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 record10 events · exact dates, newest first
- Deed / saleDeed / sale $150K
- L&I violationVUPD-GRAFFITI
- L&I violationEXT-GRAFFITI
- L&I violationGRAFFITI
- L&I violationVUPD-EXT-GRAFFITI
- L&I violationSIGNS - PUBLIC PROPERTY
- L&I violationSIGNS - AFFIXED TO TREES
- L&I violationSIGN-IMMINENTLY DANGEROUS
- L&I violationSIGNS - NO PERMIT
- L&I violationSIGN-UNSAFE
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$1,622/year estimated property tax
2026 taxable assessment $115,900 × 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 $216,900. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 4120122002026 OPA removes $100,000 from the taxable assessment through the owner-occupant exemption.
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.”
The property, on paper
OPA physical field record.
Bedrooms
3
Bathrooms
1
Stories
2
Interior
1,381 sqft
livable area
Lot
1,840 sqft
Basement
Full, unfinished
city code C
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
Average
city code 4
Above averageBelow average
Quality grade
C
assessor's grade
ABCDE
Zoning
RSA3
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
4500 block of Knorr St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 4508 Knorr St · 4512 Knorr St
L&I licenses checked through Jul 25, 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 10 dated rows
- Recorded transfer$150K transfer
2019
- ViolationVUPD-GRAFFITI
Case 407215 · Violation 2971046 · Code PM-311.0/90 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationEXT-GRAFFITI
Case 407215 · Violation 2971043 · Code PM-311.0/2 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationGRAFFITI
Case 407215 · Violation 2971044 · Code PM-311.0/91 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationVUPD-EXT-GRAFFITI
Case 407215 · Violation 2971045 · Code PM-311.0/1 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationSIGNS - PUBLIC PROPERTY
Case 265482 · Violation 1969686 · Code CP-901 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationSIGNS - AFFIXED TO TREES
Case 265482 · Violation 1969687 · Code CP-902 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationSIGN-IMMINENTLY DANGEROUS
Case 265482 · Violation 1969688 · Code PM-308.1/20 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationSIGNS - NO PERMIT
Case 265482 · Violation 1969685 · Code CP-900 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationSIGN-UNSAFE
Case 265482 · Violation 1969689 · Code PM-307.1/20 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
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 26, 2026, 1:37 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)