2026 taxable assessment $172,940 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $864,700; it is not the 2026 billed-year value.
House report
850 N 4th St
3 bd · 3 ba · 3 stories · 2,389 sqft · RSA5 · built 2017
Owner-occupancy signal · assessed $865K (2026) · 2027 OPA assessment $865K · sold 2×. On the 800 block of N 4th St.
BlockReport AI · cited public records
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Property summary
Assessment$864,7002026 OPA assessment · 2027: $864,700
Last sale$601KRecorded 2017
Est. tax bill$2,421/year2026 taxable assessment · full-value scenario $12,104/year · basis and term unverified
Tax delinquencyNo 2022 matchNot proof account is current
Permits13Every fetched City permit
Violations0 open4 historical across 2 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 0562004202026 OPA taxes $172,940 of $864,700 assessed. The assessment fields alone do not identify a program, approval date, expiration, or buyer eligibility.
See the assessment math →Applying the same rate to the billed-year full assessment. OPA's numeric split does not say when or whether the current treatment changes.
See the assessment math →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 recordNew construction
Record summary$601K transfer recorded in 2017; new construction appears in a 2013 permit with a reduced taxable assessment shown, followed by a recorded transfer of $775K in 2024.
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
Verify the current tax bill and exemption
The 2026 taxable assessment implies about $2,421/yr, while applying the same rate to the full assessment would imply about $12,104/yr — $9,683/yr more. OPA's assessment split does not establish the exemption program, expiration, or buyer eligibility. Verify the basis and live bill with OPA and Revenue.
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
Verify which assessment relief applies
OPA shows a material assessment exemption, but this record does not identify its legal basis or transfer treatment. Ask OPA for the approval history; if the current treatment ends, an eligible owner-occupant may need to apply separately for Homestead relief.
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
$864,700
2026 billed-year assessment · 2027: $864,700 · built 2017
Price / sq ft
$362
block $350 · in line w/ block
Assessment change
+3533%
+39%/yr since 2016 · 2027 +0% vs 2026
Est. tax bill / yr
$2,421
0.28% effective, reduced taxable assessment
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$24K 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$83K 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$637K 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$674K 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$697K 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$697K 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$697K 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$751K 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$751K 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$865K 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$865K 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$865K 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 · 2017Deed / sale $601KA 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 · 2024Deed / sale $775KA 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 · 2013-05-02New constructionThis 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 · 2013-05-13PlumbingThis 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 · 2013-06-28SuppressionThis permit category usually covers fire-suppression systems or related life-safety 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 · 2013-07-02ElectricalThis 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 · 2013-07-23MechanicalThis 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 · 2015-09-30PlumbingThis 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 · 2019-07-02ZoningThis permit category usually covers the property’s allowed use, dimensions, occupancy, or site configuration. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2019-07-02AdditionThis 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 · 2019-08-30SuppressionThis permit category usually covers fire-suppression systems or related life-safety 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 · 2019-10-07ElectricalThis 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 · 2019-12-06AdministrativeThis 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 · 2014-02-20WORKMANLIKE- BUILDING CODEA 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 · 2014-02-20PROPERLY REMOVE DEMO DEBRISA 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 · 2014-12-20INSURANCE - 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 · 2019-10-08CONSTRUCTION DOCUMENTSA 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 ↗
- Certification · 2024-05-22Sprinkler CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
Property assessmentBlock median & rangeZIP 19123 medianAssessmentDeed / saleL&I violationPermitCertification
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 record18 events · exact dates, newest first
- CertificationSprinkler Certification
- Deed / saleDeed / sale $775K
- PermitAdministrative
- L&I violationCONSTRUCTION DOCUMENTS
- PermitElectrical
- PermitSuppression
- PermitZoning
- PermitAddition
- Deed / saleDeed / sale $601K
- PermitPlumbing
- L&I violationINSURANCE - POST CERT
- L&I violationWORKMANLIKE- BUILDING CODE
- L&I violationPROPERLY REMOVE DEMO DEBRIS
- PermitMechanical
- PermitElectrical
- PermitSuppression
- PermitPlumbing
- PermitNew construction
The paper trail
New construction$601K transfer recorded in 2017; new construction appears in a 2013 permit with a reduced taxable assessment shown, followed by a recorded transfer of $775K in 2024.
- 2013 MechanicalPermit
- 2014 3 L&I violationsL&I
- 2015 PlumbingPermitPlumbingPermit
- 2017 $601KTransfer
- 2019 L&I violationL&IZoningPermitAdditionPermitSuppressionPermitElectricalPermitAdministrativePermit
- 2024 $775KTransfer
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 20 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- CertificationSprinkler Certification
Certification BC-2024-015287 · Certified
Expires 2025-05-22
- Recorded transfer$775K transfer
2024
- PermitAdministrative
Permit 1027189 · COMPLETED
AMEND BUILDING PERMIT #962562 FOR THE NEW CONSTRUCTION OF A PERGOLA ON THE ROOF DECK PER APPROVED PLANS.
- ViolationCONSTRUCTION DOCUMENTS
Case 962562 · Violation 5208732 · Code A-302.5 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- PermitElectrical
Permit 1016719 · COMPLETED
INSTALL 3-RECESSED LIGHTS, 2-SWITCHES, 4-RECEPTACLES & REPLACE 3-LIGHT FIXTURES AS PER NEC 2008 NORTH CENTRAL DISTRICT
- PermitSuppression
Permit 1005863 · COMPLETED
EZ PERMIT SPRINKLER RELOCATION (NFPA 13)- FOR THE RELOCATION OF SPRINKLER HEADS AS PER ATTACHED STANDARDS. DEVIATIONS FROM THESE STANDARDS REQUIRE SUBMISSION OF CONSTRUCTION AND SITE PLANS. RELOCATE 1 SPRINKLER HEAD
- PermitZoning
Permit 962561 · COMPLETED
FOR ADDITION OF A ROOF DECK AND ROOF-DECK ACCESS STRUCTURE TO AN EXISTING BUILDING FOR CONTINUED USE AS A SINGLE-FAMILY HOUSEHOLD LIVING. SIZE AND LOCATION AS PER APPROVED PLAN.
- PermitAddition
Permit 962562 · COMPLETED
FOR ADDITION OF A ROOF DECK AND ROOF-DECK ACCESS STRUCTURE TO AN EXISTING BUILDING PER APPROVED PLANS FOR CONTINUED USE AS A SINGLE-FAMILY HOUSEHOLD LIVING. SEPARATE PERMITS REQUIRED FOR MECHANICAL, ELECTRICAL, PLUMBING AND FIRE SUPPRESSION.
- Recorded transfer$601K transfer
2017
- PermitPlumbing
Permit 642077 · COMPLETED
3/4 DISTRIBUTION PA20152722881 (SFD)SELF CERTIFICATION'S ARE NO LONGER PERMITTED","ALL EXCAVATIONS AND PLUMBING TRENCHES IN EXCESS OF 5 FT IN DEPTH MUST HAVE APPROVED SHORING IN PLACE AT THE TIME OF INSPECTION"
- PermitPlumbing
Permit 634411 · COMPLETED
3/4 WATER SERVICE
- ViolationINSURANCE - POST CERT
Case 462801 · Violation 3429300 · Code A-302.8/32 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationWORKMANLIKE- BUILDING CODE
Case 462801 · Violation 3429298 · Code A-104.1/1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPROPERLY REMOVE DEMO DEBRIS
Case 462801 · Violation 3429299 · Code A-104.1/6 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- PermitMechanical
Permit 484754 · COMPLETED
INSTALLATION OF (2) HVAC UNIT INCLUDING DUCTWORK (SFD)
- PermitElectrical
Permit 480925 · COMPLETED
200AMP SERVICE, REWIRE 1ST, 2ND & 3RD FLOORS ARC FAULT GFIC KITCHEN, BATH GROUNDING AS PER NEC 2008 (SFD)
- PermitSuppression
Permit 474534 · COMPLETED
INSTALL NEW FIRE SUPPRESSION SYSTEM AND 2" SERVICE IN ACCORDANCE WITH NFPA 13R THROUGHOUT THE ENTIRE BUILDING. ALL WORK SHALL COMPLY WITH THE APPROVED PLANS. ALL WORK SHALL BE PERFORMED BY A FIRE SUPPRESSION CONTRACTOR LICENSED BY THE CITY OF PHILADELPHIA.
- PermitPlumbing
Permit 470940 · EXPIRED
3 TOILETS, 3 TUBS AND SHOWER, 3 LAVS, 1 KITCHEN AND 1 LAUNDRY
- PermitNew construction
Permit 462801 · COMPLETED
ERECTION OF A FOUR (4) STORY SINGLE FAMILY DWELLING ON PREVIOUSLY APPROVED FOUNDATION PERMIT# 449517. NFPA 13R MINIMUM FIRE SUPPRESSION SYSTEM REQUIRED.
- PermitNew construction
Permit 449517 · COMPLETED
FOOTINGS AND FOUNDATIONS ONLY. SPECIAL INSPECTION REQUIRED FOR UNDERPINNING.
What this record suggests
The City file documents 13 permits touching kitchen work, bathroom work, electrical work, plumbing. 12 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
Flags: material assessment exemption — legal basis and term unverified. Informational only — not investment advice or a consumer report (FCRA).
The assessment exemption gap
OPA's 2026 taxable assessment implies about $2,421/year. Applying the same 1.3998% rate to the full assessed value would imply ~$12,104/year — $9,683/year more. That is a scenario, not a forecast: the assessment split alone does not identify the exemption program, approval date, expiration, transfer treatment, or live Tax Center balance.
2026: ($864,700 assessed − $691,747 exempt) × 1.3998% ≈ $2,421/yr
full-assessment scenario: $864,700 × 1.3998% ≈ $12,104/yr
The OPA amount does not prove a ten-year abatement or any other specific program. Obtain the approval history and verify the current Tax Center account; a buyer should not assume the seller's relief transfers or restarts.
The property, on paper
The city assessor's field record — the physical spec sheet behind the assessed number.
Bedrooms
3
Bathrooms
3
Stories
3
Interior
2,389 sqft
livable area
Lot
767 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Garage
1 space
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.
Run the numbers
What owning 850 N 4th St takes, at your price and your rate. Taxes start with an annual estimate from the City’s taxable assessment, not a current bill or balance; rent starts at the area median. Assessed value is not an asking price — set the price slider to the real one.
When this house last sold (2017) a 30-year mortgage ran about 3.99% — Freddie Mac's average that year.
Mortgage
—
P&I · 30-yr fixed
All-in monthly
—
+ taxes & insurance
Estimated cash needed
—
down + 4% planning allowance
Modeled cash flow
—
rent − shown costs · /mo
Modeled cap rate
—
modeled NOI ÷ price
Modeled cash-on-cash
—
modeled year-1 return
Scenario for orientation, not advice. Assumes a 30-year fixed loan, $1,400/yr insurance, 1% of price/yr maintenance, and buyer cash equal to the down payment plus 4%. Taxes use this parcel's taxable assessment with an optional full-assessment stress test, not a live Tax Center balance. Cash flow and returns exclude vacancy, management, utilities, HOA or condo fees, leasing costs, income tax, and unplanned capital work.
Block context
850 N 4th St sits on the 800 block of N 4th St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 850 N 4th St · 850 N 4th 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
- Imagery — Street photo © Google · Aerial © Esri, Maxar
Methodology & freshness
This report was assembled Jul 10, 2026, 10:01 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)