2026 taxable assessment $164,800 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $272,700; it is not the 2026 billed-year value.
House report
4520 Mercer St
2 bd · 1 ba · 2 stories · 1,162 sqft · RSA5 · built 1920
Owner-occupancy signal · assessed $265K (2026) · 2027 OPA assessment $273K · sold 1×. On the 4500 block of Mercer St.
BlockReport AI · cited public records
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Property summary
Assessment$264,8002026 OPA assessment · 2027: $272,700
Last sale$137KRecorded 2015 · later nominal deed
Est. tax bill$2,307/year2026 OPA · Homestead-adjusted
Tax delinquencyNo 2022 matchNot proof account is current
Permits4Every fetched City permit
Violations0 open7 historical across 4 cases
“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 4532104002026 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.”
What stands out
From the public recordPermit on record
Record summary$137K transfer recorded in 2015. Electrical permit recorded in 2015.
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 1920: 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.
The last transfer used nominal consideration
The latest deed records $100 or less and shared-name parties. That is not a usable market-sale price and can reflect a family, estate, gift, correction, or entity transfer. Inspect the deed and order a title search rather than inferring the relationship or chain.
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
$264,800
2026 billed-year assessment · 2027: $272,700 · built 1920
Price / sq ft
$235
block $172 · above block
Assessment change
+119%
+7%/yr since 2016 · 2027 +3% vs 2026
Est. tax bill / yr
$2,307
0.87% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
1
latest deed has shared-name parties
Assessment vs. the block and ZIP · every dated City record marked on the line
- OPA assessment · 2016$124K 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$124K 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$124K 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$183K 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$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 · 2021$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 · 2022$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 · 2023$262K 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$262K 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$265K 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$265K 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$273K 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 $137KA 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 · 2015-03-16Major 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 · 2015-03-19MechanicalThis 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 · 2015-03-19PlumbingThis 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 · 2015-03-31ElectricalThis 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 ↗
- L&I violation · 2011-08-16PERSONAL PROPERTY EXT 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 · 2013-06-24PERSONAL PROPERTY EXT 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 · 2014-10-20FIRE-ELECT EXT CORDS PROHIBA 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 · 2014-10-20VIOL C&I MESSAGEA 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 · 2014-10-20PERSONAL PROPERTY EXT 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 · 2014-10-20REFRIGERATOR DOORSA 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 · 2014-10-20CLIP 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 · 2014-10-20CI 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 · 2012-02-06ADMIN INSP (likely: administrative inspection)Legacy inspection shorthand; the title alone does not state what condition was examined.What Philadelphia inspections check ↗
- Inspection · 2015-04-24CI 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 ↗
- License · 2014-10-31RentalA 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 19137 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 record16 events · exact dates, newest first
- InspectionCI INSP
- PermitElectrical
- PermitMechanical
- PermitPlumbing
- PermitMajor alteration
- Deed / saleDeed / sale $137K
- LicenseRental
- L&I violationFIRE-ELECT EXT CORDS PROHIB
- L&I violationVIOL C&I MESSAGE
- L&I violationPERSONAL PROPERTY EXT OWNER
- L&I violationREFRIGERATOR DOORS
- L&I violationCLIP VIOLATION NOTICE
- InspectionCI INSP
- L&I violationPERSONAL PROPERTY EXT OWNER
- InspectionADMIN INSP (likely: administrative inspection)
- L&I violationPERSONAL PROPERTY EXT OWNER
The paper trail
Permit on record$137K transfer recorded in 2015. Electrical permit recorded in 2015.
- 2011 L&I violationL&I
- 2012 Inspection passedL&I visit
- 2013 L&I violationL&I
- 2014 5 L&I violationsL&IInspection failedL&I visit
- 2015 Major alterationPermitMechanicalPermitPlumbingPermitElectricalPermitInspection passedL&I visit$137KTransfer
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 16 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- InvestigationCI INSP
Case 457553 · PASSED
The cited inspection visit was marked passed.
- PermitElectrical
Permit 599499 · COMPLETED
COMPLETE REWIRE TO AN EXISTING 100AMP SERVICE,REPLACING OUTLETS,ALL LIGHTING FIXTURES AND SMOKE DETECTORS AS PER 2008 NEC (EAST DISTRICT)
- PermitMechanical
Permit 597131 · COMPLETED
INSTALL 1 HVAC UNIT WITH DUCTWORK (SFD)
- PermitPlumbing
Permit 597347 · COMPLETED
ROUGH IN FULL BATHROOM & 1/2 BATHROOM, LAUNDRY TUB, STACK & RAIN LEADER (SFD) NOTE: THE INSTALLATION WILL COMPLY WITH THE PHILADELPHIA PLUMBING CODE 2004
- PermitMajor alteration
Permit 596329 · COMPLETED
EZ PERMIT STADARD ALTERATIONS- FOR ALTERATIONS TO AN EXISTING ONE FAMILY DWELLING AS PER ATTACHED STANDARD. DEVIATIONS FROM THIS STANDARD WILL RESULT IN PERMIT REVOCATION AND REQUIRE SUBMISSION OF CONSTRUCTION PLANS.
- Recorded transfer$137K transfer
2015
- LicenseRental
License 646282 · Inactive
MICHEAL JORDON · Expires 2016-02-29 · Inactive 2016-04-29
- ViolationFIRE-ELECT EXT CORDS PROHIB
Case 457553 · Violation 3365381 · Code FC-605.5/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationVIOL C&I MESSAGE
Case 457553 · Violation 3365380 · Code A-000.0/10 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPERSONAL PROPERTY EXT OWNER
Case 457568 · Violation 3365585 · Code CP-305B · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationREFRIGERATOR DOORS
Case 457568 · Violation 3365586 · Code CP-323 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationCLIP VIOLATION NOTICE
Case 457568 · Violation 3365584 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationCI INSP
Case 457553 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationPERSONAL PROPERTY EXT OWNER
Case 387864 · Violation 3029651 · Code CP-305B · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationADMIN INSP (likely: administrative inspection)
Case 292050 · PASSED
Legacy inspection shorthand; the title alone does not state what condition was examined. The cited inspection visit was marked passed.
- ViolationPERSONAL PROPERTY EXT OWNER
Case 292050 · Violation 2306764 · Code CP-305B · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
What this record suggests
The City file documents 4 permits touching bathroom work, electrical work, plumbing. 4 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
Flags: latest deed has shared-name parties — relationship unverified. 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
2
Bathrooms
1
Stories
2
Interior
1,162 sqft
livable area
Lot
1,190 sqft
Basement
Full, unfinished
city code C
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
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
4520 Mercer St sits on the 4500 block of Mercer St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 4518 Mercer St · 4522 Mercer 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, 10:50 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)