2026 taxable assessment $342,000 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $367,600; it is not the 2026 billed-year value.
House report
121 Mifflin St
3 bd · 1 ba · 2 stories · 1,158 sqft · RSA5 · built 1905
Owner-occupancy signal · assessed $342K (2026) · 2027 OPA assessment $368K · sold 4×. On the 100 block of Mifflin St.
BlockReport AI · cited public records
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Property summary
Assessment$342,0002026 OPA assessment · 2027: $367,600
Last sale$393KRecorded 2025
Est. tax bill$4,787/year2026 taxable assessment × 1.3998%
Tax delinquencyNo 2022 matchNot proof account is current
Permits5Every fetched City permit
Violations0 open2 historical across 1 case
“Open” reflects records available then historical records keep their source dates estimates are labeled
Question or correct this record
BlockReport can explain a discrepancy, but it cannot rewrite an official City record. Use the agency that owns the underlying fact:
Property tax
The estimate, live balance, and back-tax record are different.
BlockReport can calculate the annual tax from the City’s taxable assessment. Payments, credits, interest, and a current amount due live separately in Philadelphia Tax Center.
A Tax Center balance is net of bills, payments, credits, interest, and adjustments. A credit—or an amount due—is not automatically “back taxes.”
OPA 0111695002026 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.”
What stands out
From the public recordPermit between transfers
Record summary$143K transfer in 2014; major alteration permit in 2016; $393K transfer in 2025 (+175% between recorded amounts).
View supporting records →What to do with this
The record, translated into moves — what a buyer, the owner, and a landlord would each want to check next under Philadelphia's actual rules.
If you’re buying
Built 1905: lead rules apply
Federal law requires a lead-paint disclosure at sale for any pre-1978 home. If it will be rented, Philadelphia also requires a lead-safe or lead-free certificate before a rental license can issue.
Zoned RSA5: one household by right
Single-family rowhouse (the classic Philly row). Converting to a duplex or apartments needs a use variance the zoning board rarely grants — Pennsylvania courts require a physical hardship of the lot itself, and economics alone do not qualify.
If you own it
$1,399/yr may be unclaimed
This home reads owner-occupied but shows no Homestead Exemption, which removes $100,000 from the taxable assessment (worth up to $1,399/yr). Applying through the City is free and takes minutes.
Derived from the fetched property records and linked City guidance as of 2026. Assessment treatment is not a substitute for an exemption approval, live balance, title report, license, occupancy certificate, or inspection. Informational only — not legal, tax, or investment advice.
Assessment and tax history
Every fetched annual City assessment for this house, compared with its block and ZIP. The figures show assessment change, the billed-year tax estimate, dated tax records, and recorded transfers. They do not estimate market appreciation or investment return.
Assessed value
$342,000
2026 billed-year assessment · 2027: $367,600 · built 1905
Price / sq ft
$317
block $246 · above block
Assessment change
+110%
+7%/yr since 2016 · 2027 +7% vs 2026
Est. tax bill / yr
$4,787
1.4% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
4
Assessment vs. the block and ZIP · every dated City record marked on the line
- OPA assessment · 2016$175K 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$175K 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$175K 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$238K 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$238K 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$238K 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$238K 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$375K 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$375K 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$342K 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$342K 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$368K 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 · 2014Deed / sale $143KA 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 $250KA 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 · 2022Deed / sale $342KA 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 · 2025Deed / sale $393KA 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 · 2016-01-15Major 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 · 2016-02-02PlumbingThis 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 · 2016-02-18ElectricalThis 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 · 2016-04-04MechanicalThis 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 · 2022-10-12AlterationsThis 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 · 2015-12-02PENALTY- 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 · 2015-12-02STOP 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 ↗
- Inspection · 2015-12-02BP_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 · 2016-03-11BP_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 ↗
- License · 2003-03-20RentalA 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 · 2012-09-12RentalA 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 19148 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 record15 events · exact dates, newest first
- Deed / saleDeed / sale $393K
- PermitAlterations
- Deed / saleDeed / sale $342K
- Deed / saleDeed / sale $250K
- PermitMechanical
- InspectionBP_BLDG
- PermitElectrical
- PermitPlumbing
- PermitMajor alteration
- L&I violationPENALTY- NO BLDG PERM INFO
- L&I violationSTOP WORK ORDER
- InspectionBP_BLDG
- Deed / saleDeed / sale $143K
- LicenseRental
- LicenseRental
The paper trail
Permit between transfers$143K transfer in 2014; major alteration permit in 2016; $393K transfer in 2025 (+175% between recorded amounts).
- 2014 $143KTransfer
- 2015 2 L&I violationsL&IInspection failedL&I visit
- 2016 Major alterationPermitPlumbingPermitElectricalPermitMechanicalPermitInspection failedL&I visit
- 2017 $250KTransfer
- 2022 $342KTransferAlterationsPermit
- 2025 $393KTransfer
Records behind the chart
Browse the source ledger
The chart above is the primary timeline. This drawer preserves every underlying dated row and its filed status for source-level review.
Browse 15 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- Recorded transfer$393K transfer
2025
- PermitAlterations
Permit PP-2022-014807 · Completed
REPAIR/REPLACE Curb Trap Fresh Air Inlet
- Recorded transfer$342K transfer
2022
- Recorded transfer$250K transfer
2017
- PermitMechanical
Permit 681387 · COMPLETED
EZ PERMIT DUCTWORK & WARM-AIR APPLIANCES- FOR THE INSTALLATION OF NEW DUCTWORK, REGISTERS/GRILLES/DIFFUSERS, AND WARM-AIR APPLIANCES AS PER ATTACHED STANDARD. DEVIATIONS FROM THIS STANDARD WILL RESULT IN PERMIT REVOCATION AND REQUIRE SUBMISSION OF CONSTRUCTION PLANS.
- InvestigationBP_BLDG
Case 512428 · CLOSED
City marked the record closed; open the case for the closing reason.
- PermitElectrical
Permit 668318 · COMPLETED
REPLACE/INSTALL: 25- OUTLETS, 10- LIGHTS, 10- SWITCHES, 4- 20A DEDICATED LINES, 6- SMOKE DETECTORS, BATTERY OPERATED BACK-UP.... IN ACCORDANCE WITH 2008 NEC FOR A ONE FAMILY BUILDING
- PermitPlumbing
Permit 660696 · COMPLETED
INSTALL TOILET, LAV, TUB AND KITCHEN SINK WASHER IN BASEMENT. THE INSTALLATION WILL COMPLY WITH THE PHILADEPHIA PLUBMING CODE 2004
- InvestigationBP_BLDG
Case 512428 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitMajor alteration
Permit 664094 · COMPLETED
INTERIOR ALTERATIONS TO INCLUDE DRYWALL THROUGHOUT, MOISTURE RESISTANT DRYWALL IN THE BATHROOM AND KITCHEN, NEW WINDOWS AND DOORS IN EXISTING OPENING. APPLICANT AGREES TO LIMIT THE CONSTRUCTION TO COMPLY WITH EZ PERMIT STANDARD FOR INTERIOR ALTERATIONS, DATED JANUARY 2011. DEVIATION FROM THE STANDARD WILL RESULT IN REVOCATION OF THIS PERMIT AND IMPOSITION OF FURTHER PENALTIES. SEPARATE PERMITS REQUIRED FOR PLUMBING, ELECTRICAL AND MECHANICAL WORK
- ViolationPENALTY- NO BLDG PERM INFO
Case 512428 · Violation 3825264 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationSTOP WORK ORDER
Case 512428 · Violation 3825263 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- Recorded transfer$143K transfer
2014
- LicenseRental
License 573411 · Closed
PATRICIA A HUEBER · Expires 2015-02-28 · Inactive 2015-04-29
- LicenseRental
License 227359 · Inactive
HARFORD JOSEPH · Expires 2013-02-28 · Inactive 2012-09-12
What this record suggests
The City file documents 5 permits touching kitchen work, bathroom work, drywall / interior finishing, electrical work. 5 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
Informational only — not investment advice or a consumer report (FCRA).
The property, on paper
The city assessor's field record — the physical spec sheet behind the assessed number.
Bedrooms
3
Bathrooms
1
Stories
2
Interior
1,158 sqft
livable area
Lot
915 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
Above average
city code 3
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
121 Mifflin St sits on the 100 block of Mifflin St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 119 Mifflin St · 123 Mifflin St
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 10, 2026, 9:03 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)