2026 taxable assessment $74,200 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $265,500; it is not the 2026 billed-year value.
House report
5139 Knox St
4 bd · 1 ba · 1 story · 1,561 sqft · RSA5 · built 1910
Owner-occupancy signal · assessed $174K (2026) · 2027 OPA assessment $266K · sold 2×. On the 5100 block of Knox St.
BlockReport AI · cited public records
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Property summary
Assessment$174,2002026 OPA assessment · 2027: $265,500
Last sale$227KRecorded 2022
Est. tax bill$1,039/year2026 OPA · Homestead-adjusted
Tax delinquencyNo 2022 matchNot proof account is current
Permits5Every fetched City permit
Violations0 openNo historical match in fetched records
“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 1231809002026 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 between transfers
Record summary$75K transfer in 2021; addition and/or alteration permit in 2021; $227K transfer in 2022 (+203% 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 1910: 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.
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
$174,200
2026 billed-year assessment · 2027: $265,500 · built 1910
Price / sq ft
$170
block $117 · above block
Assessment change
+339%
+14%/yr since 2016 · 2027 +52% vs 2026
Est. tax bill / yr
$1,039
0.6% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
2
Assessment vs. the block and ZIP · every dated City record marked on the line
- OPA assessment · 2016$61K 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$61K 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$61K 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$89K 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$85K 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$85K 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$85K 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$117K 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$117K 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$174K 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$174K 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$266K 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 · 2021Deed / sale $75KA 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 $227KA 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 · 2010-12-23PlumbingThis 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 · 2021-12-29Addition 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 · 2022-01-04Addition 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 · 2022-01-05AlterationsThis 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 · 2022-01-06Addition and/or AlterationsThis 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 ↗
Property assessmentBlock median & rangeZIP 19144 medianAssessmentDeed / salePermit
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 record7 events · exact dates, newest first
- PermitAddition and/or Alterations
- PermitAlterations
- PermitAddition and/or Alteration
- Deed / saleDeed / sale $227K
- PermitAddition and/or Alteration
- Deed / saleDeed / sale $75K
- PermitPlumbing
The paper trail
Permit between transfers$75K transfer in 2021; addition and/or alteration permit in 2021; $227K transfer in 2022 (+203% between recorded amounts).
- 2010 PlumbingPermit
- 2021 $75KTransferAddition and/or AlterationPermit
- 2022 Addition and/or AlterationPermitAlterationsPermitAddition and/or AlterationsPermit$227KTransfer
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 7 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- PermitAddition and/or Alterations
Permit MP-2022-000121 · Completed
EZ PERMIT DUCTWORK & WARM-AIR APPLIANCES- For the installation if New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from these standards require submission of construction and site plans.
- PermitAlterations
Permit PP-2022-000130 · Completed
Laundry box, one and a half bath PPC 2018 (no work in basement on this permit)
- PermitAddition and/or Alteration
Permit EP-2022-000076 · Completed
Complete rewire throughout the existing single family dwelling to the existing service per the 2014 NEC
- Recorded transfer$227K transfer
2022
- PermitAddition and/or Alteration
Permit RP-2021-013630 · Completed
**CONTRACTOR HAS A NOTORIZED LETTER WITH NO EMPLOYEES, SOLE WORKER**MUST UPLOAD SUB-CONTRACTOR INFORMATION IF APPLICABLE** EZ PERMIT STANDARDS 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. Structural alteration or repair is expressly prohibited under this permit. Prohibited structural work any modifications to exterior walls, party walls, floor/roof framing or foundations, including underpinning, excavation, and removal of foundation slab. WORK IN THE BASEMENT OR CELLAR IS NOT INCLUDED ON THE EZ ALT PERMIT. Separate permits required for Mechanical, Electric and Plumbing.
- Recorded transfer$75K transfer
2021
- PermitPlumbing
Permit 318017 · COMPLETED
STORAGE TANK TYPE DOMESTIC HOT WATER HEATER REPLACEMENT
What this record suggests
The City file documents 5 permits touching bathroom work, electrical work, plumbing, roof 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
4
Bathrooms
1
Stories
1
Interior
1,561 sqft
livable area
Lot
1,209 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
New / rehabbed
city code 2
New / rehabbed
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
5139 Knox St sits on the 5100 block of Knox St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 5137 Knox St · 5141 Knox 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 11, 2026, 2:10 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)