2026 assessment
$408K
OPA value, not a listing price
House report
420 Mifflin St
4 bd2 ba3 stories1,880 sqftRSA5built 1915
Property at a glanceHouse
Owner-occupancy signal
ZIP 19148 area
Pennsport · Lower Moyamensing
400 block of Mifflin 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$146K 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$146K 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$146K 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$263K 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$285K 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$285K 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$285K 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$293K 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$293K 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$408K 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$408K 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$410K 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 · 2015Deed / sale $290KA 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 · 2014-07-23Major alterationA broad legacy permit work category for a substantial building alteration. It can include changed layouts, partitions, fixtures, finishes, structural work, or occupancy-related work, but only the approved scope and plans say what this permit actually authorized; separate trade permits may be required.What Philadelphia building permits can cover ↗
- Permit · 2014-07-25MechanicalThis 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 · 2014-08-01ElectricalThis 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 · 2014-08-06PlumbingThis 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 · 2015-01-06Addition and/or AlterationThis 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 · 2015-04-30PlumbingThis 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 · 2020-10-30Addition and/or AlterationThis 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 · 2014-07-18STOP WORK ORDERA 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 · 2014-07-18PENALTY- 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 · 2014-07-18PENALTY- NO ELEC 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 · 2014-07-18PENALTY- NO PLUMB 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 ↗
- Inspection · 2014-07-18BP_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 · 2014-10-10BLDG PERMIT REQUIREDA 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 · 2014-10-10BP_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 · 2014-10-09INSURANCE - POST CERTA 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 · 2015-04-14PERM - MUST POSTA 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 · 2014-08-12BP_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 · 2014-12-08BP_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 · 2015-01-28BP_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 ↗
Property assessmentBlock median & rangeZIP 19148 (Pennsport · Lower Moyamensing) medianAssessmentDeed / saleL&I violationPermitInspection
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 record20 events · exact dates, newest first
- PermitAddition and/or Alteration
- PermitPlumbing
- L&I violationPERM - MUST POST
- InspectionBP_BLDG
- PermitAddition and/or Alteration
- Deed / saleDeed / sale $290K
- InspectionBP_BLDG
- L&I violationBLDG PERMIT REQUIRED
- InspectionBP_BLDG
- L&I violationINSURANCE - POST CERT
- InspectionBP_BLDG
- PermitPlumbing
- PermitElectrical
- PermitMechanical
- PermitMajor alteration
- L&I violationSTOP WORK ORDER
- L&I violationPENALTY- NO BLDG PERM INFO
- L&I violationPENALTY- NO ELEC PERM INFO
- L&I violationPENALTY- NO PLUMB PERM INFO
- InspectionBP_BLDG
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$4,304/year estimated property tax
2026 taxable assessment $307,500 × 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 $409,900. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 3920023002026 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
4
Bathrooms
2
Stories
3
Interior
1,880 sqft
livable area
Lot
1,040 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
Above average
city code 3
Above averageBelow average
Interior condition
Above average
city code 3
Above averageBelow average
Quality grade
B-
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
400 block of Mifflin St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 418 Mifflin St · 422 Mifflin 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.
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 20 dated rows
- PermitAddition and/or Alteration
Permit EP-2020-007557 · Completed
Installation of a Solar Photovoltaic system in accordance with attached standard.
- PermitPlumbing
Permit 606867 · COMPLETED
REPLACE WATER DIST 3/4" - PA1# 2015-1182025 - "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"
- ViolationPERM - MUST POST
Case 582823 · Violation 3522456 · Code A-302.8/30 · ERROR
- InvestigationBP_BLDG
Case 456443 · PASSED
The cited inspection visit was marked passed.
- PermitAddition and/or Alteration
Permit 582823 · Issued
REMOVAL OF OLD CINDER BLOCK WALL IN THE BACKYARD ACTING AS A FENCE & BUILD A NEW WALL (REPLACED IN KIND)
- Recorded transfer$290K transfer
2015
- InvestigationBP_BLDG
Case 456443 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationBLDG PERMIT REQUIRED
Case 456443 · Violation 3415967 · Code A-501.1/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 456443 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationINSURANCE - POST CERT
Case 551202 · Violation 3355414 · Code A-302.8/32 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 443322 · PASSED
The cited inspection visit was marked passed.
- PermitPlumbing
Permit 554171 · COMPLETED
2 FULL BATH,1 POWDER ROOM,KITCHEN AND LAUNDRY (SFD)
- PermitElectrical
Permit 553317 · COMPLETED
ELECTRICAL WIRING THROUGHOUT (SFD) AS PER NEC 2008
- PermitMechanical
Permit 551045 · COMPLETED
INSTALLATION OF (1) WARM AIR FURNACE W/AIR AND RELATED DUCT WORK
- PermitMajor alteration
Permit 551202 · COMPLETED
INTERIOR ALTERATIONS - SINGLE FAMILY DWELLING - APPLICANT AGREES TO LIMIT THE CONSTRUCTION TO COMPLY WITH EZ PERMIT STANDARD FOR INTERIOR ALTERATIONS. SEPARATE PERMITS REQUIRED FOR PLUMBING, ELECTRIC AND HVAC.
- ViolationSTOP WORK ORDER
Case 443322 · Violation 3259623 · Code A-504.1/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPENALTY- NO BLDG PERM INFO
Case 443322 · Violation 3259624 · Code A-901.13/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPENALTY- NO ELEC PERM INFO
Case 443322 · Violation 3259625 · Code A-901.13/2 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPENALTY- NO PLUMB PERM INFO
Case 443322 · Violation 3259626 · Code A-901.13/3 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 443322 · FAILED
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 23, 2026, 11:05 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)