2026 assessment
$197K
OPA value, not a listing price
House report
639 Mayfair St
Research this property with Analyst →3 bd1 ba2 stories1,180 sqftRSA5built 1950
Property at a glanceHouse
Individual, other or unknown mailing address
ZIP 19120 area
Olney · Logan
600 block of Mayfair St
Open L&I record
Open City history ↗3 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 725724
IN VIOLATIONNotice Of Violation
- Clip Violation Notice
CP-01 - Rubbish/Garbage Exterior-Owner
CP-305 - License - Rental Property
CP-101
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$105K 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$105K 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$105K 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$102K 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$106K 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$106K 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$106K 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$154K 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$154K 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$197K 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$197K 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$208K 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 · 2005Deed / sale $130KA 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 · 2017Deed / sale $160KA 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 · 2017Deed / sale $85KA 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 · 2018-11-01INTERIOR SURFACESA 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 · 2018-11-01SINGLE STATION SMKE ALRM REQ'DA 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 · 2018-11-01CARBON MONOXIDE ALARM REQ'DA 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 · 2018-11-01PLUMB SYSTEMS-WATER 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 · 2020-02-28CLIP 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 · 2020-02-28RUBBISH/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 · 2020-02-28LICENSE - RENTAL 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 · 2025-05-16EXTERIOR AREA WEEDSA 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 · 2025-05-16L&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 · 2018-11-02HCEU 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 · 2019-01-03HCEU 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 · 2025-06-08L&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 ↗
- License · 2018-08-13YUK LING ZHANG & SIN YUNG ZHANG: 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 · 2019-10-11YUK LING ZHANG & SIN YUNG ZHANG: 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 · 2010-02-25JUN W ZHANG: 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 · 2018-02-28JUN W ZHANG: Rental landlord or residential registration marked closedA 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 19120 (Olney · Logan) medianAssessmentDeed / saleL&I violationInspectionLicense
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 record19 events · exact dates, newest first
- InspectionL&I investigation
- L&I violationEXTERIOR AREA WEEDS
- InspectionL&I investigation
- L&I violationCLIP VIOLATION NOTICE
- L&I violationRUBBISH/GARBAGE EXTERIOR-OWNER
- L&I violationLICENSE - RENTAL PROPERTY
- LicenseYUK LING ZHANG & SIN YUNG ZHANG: Rental landlord or residential registration marked inactive
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationINTERIOR SURFACES
- L&I violationSINGLE STATION SMKE ALRM REQ'D
- L&I violationCARBON MONOXIDE ALARM REQ'D
- L&I violationPLUMB SYSTEMS-WATER GENERAL
- LicenseYUK LING ZHANG & SIN YUNG ZHANG: Rental landlord or residential registration initially issued
- LicenseJUN W ZHANG: Rental landlord or residential registration marked closed
- Deed / saleDeed / sale $160K
- Deed / saleDeed / sale $85K
- LicenseJUN W ZHANG: Rental landlord or residential registration initially issued
- Deed / saleDeed / sale $130K
Flags: 3 L&I violation rows marked OPEN · latest deed has shared-name parties; relationship unverified. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$2,752/year estimated property tax
2026 taxable assessment $196,600 × 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 $207,900. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 3510718002026 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.”
The property, on paper
OPA physical field record.
Bedrooms
3
Bathrooms
1
Stories
2
Interior
1,180 sqft
livable area
Lot
1,697 sqft
Basement
Full
city code D
Heat
Hot water / radiators
city code B
Central air
Yes
Garage
1 space
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
RSA5
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
600 block of Mayfair St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 637 Mayfair St · 641 Mayfair St
L&I license dates · data through Jul 28, 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 28, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
YUK LING ZHANG & SIN YUNG ZHANGInactive
Rental · Initial issue date Aug 13, 2018 · Terminal license date Oct 11, 2019
JUN W ZHANGClosed
Rental · Initial issue date Feb 25, 2010 · Terminal license date Feb 28, 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 19 dated rows
- InvestigationL&I investigation
Case CF-2025-044229 · PASSED
The cited inspection visit was marked passed.
- ViolationEXTERIOR AREA WEEDS
Case CF-2025-044229 · Violation VI-2025-033258 · Code PM15-302.4 · COMPLIED
Resolution: COMPLIED - OWNER REPAIR City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationL&I investigation
Case CF-2025-044229 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationCLIP VIOLATION NOTICE
Case 725724 · Violation 211992768 · Code CP-01 · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- ViolationRUBBISH/GARBAGE EXTERIOR-OWNER
Case 725724 · Violation 211992771 · Code CP-305 · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- ViolationLICENSE - RENTAL PROPERTY
Case 725724 · Violation 211992730 · Code CP-101 · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- License terminal eventYUK LING ZHANG & SIN YUNG ZHANG: Rental landlord or residential registration marked inactive
License 786015 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 662133 · 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 662133 · 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.
- ViolationINTERIOR SURFACES
Case 662133 · Violation 4861375 · Code PM15-305.3 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationSINGLE STATION SMKE ALRM REQ'D
Case 662133 · Violation 4861373 · Code FC-13-907.2 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationCARBON MONOXIDE ALARM REQ'D
Case 662133 · Violation 4861374 · Code FC-13-908.7 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPLUMB SYSTEMS-WATER GENERAL
Case 662133 · Violation 4861376 · Code PM15-505.1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- License issue eventYUK LING ZHANG & SIN YUNG ZHANG: Rental landlord or residential registration initially issued
License 786015 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- License terminal eventJUN W ZHANG: Rental landlord or residential registration marked closed
License 494250 · Closed
License event. Registration does not prove present operation or storefront occupancy.
- Recorded transfer$160K transfer
2017
- Recorded transfer$85K transfer
2017
- License issue eventJUN W ZHANG: Rental landlord or residential registration initially issued
License 494250 · Closed
License event. Registration does not prove present operation or storefront occupancy.
- Recorded transfer$130K transfer
2005
Unavailable when this report assembled: certifications. Unavailable does not mean no record.
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 29, 2026, 8:38 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: unavailable. “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)