2026 assessment
$166K
OPA value, not a listing price
House report
4237 Mill St
3 bd · 1 ba · 2 stories · 986 sqft · RSA5 · built 1945
Property at a glanceHouse
Entity-held
2027 published assessment
$162K
Future roll, not the current tax bill
Location
4200 block of Mill St
ZIP 19136
Neighborhood area
Holmesburg · Mayfair
Approximate · based on ZIP 19136
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.
Assessed value
$165,800
2026 billed-year assessment · 2027: $162,200 · built 1945
Price / sq ft
$165
block $165 · in line w/ block
Assessment change
+79%
+5%/yr since 2016 · 2027 -2% vs 2026
Est. tax bill / yr
$2,321
1.4% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
3
- OPA assessment · 2016$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 · 2017$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 · 2018$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 · 2019$104K 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$110K 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$110K 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$110K 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$125K 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$125K 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$166K 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$166K 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$162K 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 · 1970Deed / sale $55KA 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 · 2007Deed / sale $59KA 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 · 2021Deed / sale $55KA 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 · 2007-10-09LICENSE - 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 · 2007-10-09HIGH 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 · 2007-10-09CLIP 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 · 2007-10-09HCEU 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 · 2008-08-28CLIP 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 · 2008-08-28HIGH 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 · 2009-05-26HIGH 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 · 2009-05-26CLIP 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 · 2012-04-19LICENSE - 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 · 2012-09-17CLIP 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 · 2012-09-17HIGH 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 · 2016-06-15LICENSE - 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 · 2016-06-15CLIP 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 · 2016-11-01HIGH 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 · 2016-11-01CLIP 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 · 2024-06-26EXTERIOR 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 · 2024-06-26L&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 · 2007-10-25HCEU 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 · 2013-02-27ADMIN INSP (likely: administrative inspection)Legacy inspection shorthand; the title alone does not state what condition was examined.What Philadelphia inspections check ↗
- Inspection · 2013-03-15ADMIN INSP (likely: administrative inspection)Legacy inspection shorthand; the title alone does not state what condition was examined.What Philadelphia inspections check ↗
- Inspection · 2013-04-08ADMIN INSP (likely: administrative inspection)Legacy inspection shorthand; the title alone does not state what condition was examined.What Philadelphia inspections check ↗
- Inspection · 2013-05-03ADMIN INSP (likely: administrative inspection)Legacy inspection shorthand; the title alone does not state what condition was examined.What Philadelphia inspections check ↗
- Inspection · 2015-03-03ADMIN INSP (likely: administrative inspection)Legacy inspection shorthand; the title alone does not state what condition was examined.What Philadelphia inspections check ↗
- Inspection · 2024-08-06L&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 · 2022-06-17YZ PROPERTY 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 · 2026-06-16YZ PROPERTY LLC: Rental landlord or residential registration marked expiredA 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 · 2018-02-25CHENZHENG01 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 · 2026-04-25CHENZHENG01 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 ↗
Property assessmentBlock median & rangeZIP 19136 (Holmesburg · Mayfair) 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 record31 events · exact dates, newest first
- LicenseYZ PROPERTY LLC: Rental landlord or residential registration marked expired
- LicenseCHENZHENG01 LLC: Rental landlord or residential registration marked inactive
- InspectionL&I investigation
- L&I violationEXTERIOR AREA WEEDS
- InspectionL&I investigation
- LicenseYZ PROPERTY LLC: Rental landlord or residential registration initially issued
- Deed / saleDeed / sale $55K
- LicenseCHENZHENG01 LLC: Rental landlord or residential registration initially issued
- L&I violationHIGH WEEDS-CUT
- L&I violationCLIP VIOLATION NOTICE
- L&I violationLICENSE - RENTAL PROPERTY
- L&I violationCLIP VIOLATION NOTICE
- InspectionADMIN INSP (likely: administrative inspection)
- InspectionADMIN INSP (likely: administrative inspection)
- InspectionADMIN INSP (likely: administrative inspection)
- InspectionADMIN INSP (likely: administrative inspection)
- InspectionADMIN INSP (likely: administrative inspection)
- L&I violationCLIP VIOLATION NOTICE
- L&I violationHIGH WEEDS-CUT
- L&I violationLICENSE - RENTAL PROPERTY
- L&I violationHIGH WEEDS-CUT
- L&I violationCLIP VIOLATION NOTICE
- L&I violationCLIP VIOLATION NOTICE
- L&I violationHIGH WEEDS-CUT
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationLICENSE - RENTAL PROPERTY
- L&I violationHIGH WEEDS-CUT
- L&I violationCLIP VIOLATION NOTICE
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- Deed / saleDeed / sale $59K
- Deed / saleDeed / sale $55K
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$2,321/year estimated property tax
2026 taxable assessment $165,800 × 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 $162,200. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 6520112002026 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
986 sqft
livable area
Lot
1,284 sqft
Basement
Partial
city code H
Heat
Forced hot air
city code A
Central air
No
Garage
1 space
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
RSA5
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Recorded owner
Who's behind it
Yz Property LLC · corporate / LLC owner
• Owns 3 properties across Philadelphia under this name, assessed at $506K combined
• Tax bills mail to 2822a Welsh Road, Philadelphia PA, 19152
Block context
4200 block of Mill St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 4235 Mill St · 4239 Mill St
L&I license dates · data through Jul 25, 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 25, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
YZ PROPERTY LLCExpired
Rental · Initial issue date Jun 17, 2022 · Terminal license date Jun 16, 2026
CHENZHENG01 LLCInactive
Rental · Initial issue date Feb 25, 2018 · Terminal license date Apr 25, 2026
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 31 dated rows
- License terminal eventYZ PROPERTY LLC: Rental landlord or residential registration marked expired
License 898776 · Expired
License event. Registration does not prove present operation or storefront occupancy.
- License terminal eventCHENZHENG01 LLC: Rental landlord or residential registration marked inactive
License 767170 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- InvestigationL&I investigation
Case CF-2024-067543 · PASSED
The cited inspection visit was marked passed.
- ViolationEXTERIOR AREA WEEDS
Case CF-2024-067543 · Violation VI-2024-052752 · 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-2024-067543 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- License issue eventYZ PROPERTY LLC: Rental landlord or residential registration initially issued
License 898776 · Expired
License event. Registration does not prove present operation or storefront occupancy.
- Recorded transfer$55K transfer
2021
- License issue eventCHENZHENG01 LLC: Rental landlord or residential registration initially issued
License 767170 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- ViolationHIGH WEEDS-CUT
Case 561855 · Violation 4131283 · 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 561855 · Violation 4131282 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationLICENSE - RENTAL PROPERTY
Case 539350 · Violation 4051648 · Code CP-101 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationCLIP VIOLATION NOTICE
Case 539350 · Violation 4051647 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationADMIN INSP (likely: administrative inspection)
Case 324190 · PASSED
Legacy inspection shorthand; the title alone does not state what condition was examined. The cited inspection visit was marked passed.
- InvestigationADMIN INSP (likely: administrative inspection)
Case 324190 · FAILED
Legacy inspection shorthand; the title alone does not state what condition was examined. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationADMIN INSP (likely: administrative inspection)
Case 324190 · FAILED
Legacy inspection shorthand; the title alone does not state what condition was examined. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationADMIN INSP (likely: administrative inspection)
Case 324190 · FAILED
Legacy inspection shorthand; the title alone does not state what condition was examined. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationADMIN INSP (likely: administrative inspection)
Case 324190 · FAILED
Legacy inspection shorthand; the title alone does not state what condition was examined. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationCLIP VIOLATION NOTICE
Case 350784 · Violation 2579140 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationHIGH WEEDS-CUT
Case 350784 · Violation 2579141 · Code CP-312A · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationLICENSE - RENTAL PROPERTY
Case 324190 · Violation 2783216 · Code CP-101 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationHIGH WEEDS-CUT
Case 200588 · Violation 1341032 · 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 200588 · Violation 1341031 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationCLIP VIOLATION NOTICE
Case 176472 · Violation 1078465 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationHIGH WEEDS-CUT
Case 176472 · Violation 1078466 · Code CP-312A · 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 130703 · 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.
- ViolationLICENSE - RENTAL PROPERTY
Case 130703 · Violation 699814 · Code CP-101 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationHIGH WEEDS-CUT
Case 130703 · Violation 699815 · 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 130703 · Violation 699813 · 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 130703 · 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.
- Recorded transfer$59K transfer
2007
- Recorded transfer$55K transfer
1970
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, 10:26 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)