2026 assessment
$233K
OPA value, not a listing price
House report
4815 Knorr St
Research this property with Analyst →2 bd2 ba2 stories980 sqftRSA3built 1920
Property at a glanceHouse
Owner-occupancy signal
ZIP 19135 area
Tacony · Wissinoming
4800 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$95K 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$95K 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$95K 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$91K 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$200K 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$200K 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$233K 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$233K 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$220K 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 · 2010Deed / sale $104KA 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 ↗
- Deed / sale · 2018Deed / sale $170KA 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 ↗
- Permit · 2017-07-21ZoningThis 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 · 2017-07-21AdditionThis 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 · 2017-07-21PlumbingThis 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 · 2017-09-08ElectricalThis 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 · 2017-09-14MechanicalThis 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 · 2016-05-19HIGH WEEDS-CUTA 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 · 2016-05-19CLIP VIOLATION NOTICEA 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 · 2016-05-19RUBBISH/GARBAGE EXTERIOR-OWNERA 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 · 2016-08-18VACANT PROPERTIES-GENERALA 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 · 2016-08-18VACANT STRUCTURE LICENSEA 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 · 2016-08-18DOOR AND WINDOW VACANTA 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 · 2016-08-18VAC INSPA 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 · 2016-12-06ARCHITECT/ENGINEER SERVICESA 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 · 2016-12-06PENALTY- NO BLDG PERM INFOA 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 · 2016-12-06PERMZ- CONST REMOV CHANGEA 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 · 2016-12-06PERMB- ALTER REP'R EXT PORTIONA 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 · 2016-12-06BP_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 · 2017-04-12EXT S-WINDOW REPAIR/MAINTAIN (Repair or maintain exterior windows)Repair or maintain exterior windowsHow L&I violations and orders work ↗
- Inspection · 2017-04-12HCEU 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 · 2017-06-29HIGH WEEDS-CUTA 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 · 2017-06-29CLIP VIOLATION NOTICEA 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 · 2016-09-23VAC INSPA 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 · 2016-12-13VAC INSPA 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 · 2017-01-13BP_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 · 2017-02-16BP_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 ↗
- Inspection · 2017-05-26HCEU 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 · 2017-07-25HCEU 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 ↗
- Inspection · 2017-10-23PRECOURT (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 · 2018-03-19PRECOURT (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 ↗
- License · 2017-04-26CARRINGTON MORTGAGE SERV LLC: Vacant Residential Property / Lot 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 · 2018-06-24CARRINGTON MORTGAGE SERV LLC: Vacant Residential Property / Lot 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 ↗
Property assessmentBlock median & rangeZIP 19135 (Tacony · Wissinoming) medianAssessmentDeed / saleL&I violationPermitInspectionLicense
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 record33 events · exact dates, newest first
- LicenseCARRINGTON MORTGAGE SERV LLC: Vacant Residential Property / Lot landlord or residential registration marked inactive
- InspectionPRECOURT (likely: pre-court compliance inspection)
- Deed / saleDeed / sale $170K
- InspectionPRECOURT (likely: pre-court compliance inspection)
- PermitMechanical
- PermitElectrical
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- PermitZoning
- PermitAddition
- PermitPlumbing
- L&I violationHIGH WEEDS-CUT
- L&I violationCLIP VIOLATION NOTICE
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- LicenseCARRINGTON MORTGAGE SERV LLC: Vacant Residential Property / Lot landlord or residential registration initially issued
- L&I violationEXT S-WINDOW REPAIR/MAINTAIN (Repair or maintain exterior windows)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionBP_BLDG
- InspectionBP_BLDG
- InspectionVAC INSP
- L&I violationARCHITECT/ENGINEER SERVICES
- L&I violationPENALTY- NO BLDG PERM INFO
- L&I violationPERMZ- CONST REMOV CHANGE
- L&I violationPERMB- ALTER REP'R EXT PORTION
- InspectionBP_BLDG
- InspectionVAC INSP
- L&I violationVACANT PROPERTIES-GENERAL
- L&I violationVACANT STRUCTURE LICENSE
- L&I violationDOOR AND WINDOW VACANT
- InspectionVAC INSP
- L&I violationHIGH WEEDS-CUT
- L&I violationCLIP VIOLATION NOTICE
- L&I violationRUBBISH/GARBAGE EXTERIOR-OWNER
- Deed / saleDeed / sale $104K
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$1,859/year estimated property tax
2026 taxable assessment $132,800 × 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 $219,600. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 4120221002026 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
2
Bathrooms
2
Stories
2
Interior
980 sqft
livable area
Lot
2,112 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Garage
4 spaces
Exterior condition
Above average
city code 3
Above averageBelow average
Interior condition
Above average
city code 3
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
4800 block of Knorr St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 4813 Knorr St · 4817 Knorr St
L&I license dates · data through Jul 23, 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 23, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
CARRINGTON MORTGAGE SERV LLCInactive
Vacant Residential Property / Lot · Initial issue date Apr 26, 2017 · Terminal license date Jun 24, 2018
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 33 dated rows
- License terminal eventCARRINGTON MORTGAGE SERV LLC: Vacant Residential Property / Lot landlord or residential registration marked inactive
License 736623 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 565875 · PASSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. The cited inspection visit was marked passed.
- Recorded transfer$170K transfer
2018
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 579035 · PASSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. The cited inspection visit was marked passed.
- PermitMechanical
Permit 816239 · COMPLETED
DUCTWORK, GAS HEATER 92% A/C UNIT. FOR THE INSTALLATION IF NEW DUCTWORK, REGISTERS/GRILLES/DIFFUSERS, AND WARM-AIR APPLIANCES AS PER ATTACHED STANDARDS. DEVIATIONS FROM THESE STANDARDS REQUIRE SUBMISSION OF CONSTRUCTION AND SITE PLANS.
- PermitElectrical
Permit 814607 · COMPLETED
INSTALL 100AMP SERVICE, METER, PANEL AND REWIRE THROUGHOUT WITH RECEPTS,SWITCHES,LIGHTS,FIXTURES,SMOKES AND CO DETECTORS AS PER 2008 NEC (EAST DISTRICT)
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 579035 · 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.
- PermitZoning
Permit 799550 · COMPLETED
FOR THE ERECTION OF REAR ADDITIONS TO AN EXISTING SEMI-DETACHED BUILDING. SIZE AND LOCATION AS SHOWN IN APPLICATION. FOR USE AS EXISTING SINGLE FAMILY HOUSEHOLD LIVING.
- PermitAddition
Permit 799597 · COMPLETED
LEVEL II ALTERATIONS (NO CHANGE OF OCCUPANCY) TO INCLUDE REAR ADDITIONS TO AN EXISTING SEMI-DETACHED SINGLE FAMILY DWELLING (IRC 2009 SFD) AS PER APPROVED PLANS. BUILDING NOT REQUIRED TO BE SPRINKLERED. **SEPARATE PERMITS REQUIRED FOR MEP WORK**
- PermitPlumbing
Permit 801965 · COMPLETED
PLUMBING ALTERATIONS THROUGHOUT AN EXISTING SINGLE FAMILY DWELLING.
- ViolationHIGH WEEDS-CUT
Case 591272 · Violation 4367714 · Code CP-312A · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationCLIP VIOLATION NOTICE
Case 591272 · Violation 4367713 · Code CP-01 · 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 579035 · 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.
- License issue eventCARRINGTON MORTGAGE SERV LLC: Vacant Residential Property / Lot landlord or residential registration initially issued
License 736623 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- ViolationEXT S-WINDOW REPAIR/MAINTAIN (Repair or maintain exterior windows)
Case 579035 · Violation 4397114 · Code PM-304.8/1 · 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 579035 · 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.
- InvestigationBP_BLDG
Case 565875 · CLOSED
City marked the record closed; open the case for the closing reason.
- InvestigationBP_BLDG
Case 565875 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationVAC INSP
Case 550993 · CLOSED
City marked the record closed; open the case for the closing reason.
- ViolationARCHITECT/ENGINEER SERVICES
Case 565875 · Violation 4303925 · Code A-304.1/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPENALTY- NO BLDG PERM INFO
Case 565875 · Violation 4303926 · Code A-901.13/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPERMZ- CONST REMOV CHANGE
Case 565875 · Violation 4303924 · Code A-301.1/64 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPERMB- ALTER REP'R EXT PORTION
Case 565875 · Violation 4303923 · Code A-301.1/3 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 565875 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationVAC INSP
Case 550993 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationVACANT PROPERTIES-GENERAL
Case 550993 · Violation 4170215 · Code PM15-901.1 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationVACANT STRUCTURE LICENSE
Case 550993 · Violation 4170213 · Code 9-3905 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationDOOR AND WINDOW VACANT
Case 550993 · Violation 4170214 · Code PM15-304.19V · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- InvestigationVAC INSP
Case 550993 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationHIGH WEEDS-CUT
Case 534214 · Violation 3942929 · Code CP-312A · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationCLIP VIOLATION NOTICE
Case 534214 · Violation 3942927 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationRUBBISH/GARBAGE EXTERIOR-OWNER
Case 534214 · Violation 3942928 · Code CP-305 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- Recorded transfer$104K transfer
2010
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)