2026 assessment
$151K
OPA value, not a listing price
House report
4257 Neilson St
3 bd1 ba2 stories1,200 sqftRSA5built 1950
Property at a glanceHouse
Owner-occupancy signal
ZIP 19124 area
Frankford · Juniata
4200 block of Neilson St
Open L&I record
Open City history ↗2 violation rows marked OPEN in 1 active case
The actual City titles, code sections, case posture, and latest recorded inspections are shown here instead of only an aggregate count.
Case CF-2026-069162
IN VIOLATIONUnsafe structure case
- Unsafe Structure
PM15-108.1 - Decks, Balconies, & Exterior Stairs
PM15-304.1(L)
OPEN is the status in the fetched L&I file, not a new inspection by BlockReport. Read the notice for the cited condition and required correction, then verify the live case with L&I.
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$84K 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$84K 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$84K 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$90K 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$97K 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$97K 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$97K 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$134K 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$134K 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$151K 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$151K 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$161K 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 ↗
- Permit · 2008-12-04PlumbingThis 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 · 2019-06-03AlterationThis 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 · 2020-02-24PlumbingThis 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 · 2021-10-26Addition 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 · 2023-07-18Roof Covering ReplacementThis 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 · 2026-06-11UNSAFE STRUCTUREA 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 · 2026-06-11DECKS, BALCONIES, & EXTERIOR STAIRSA 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 · 2026-06-11L&I investigationA 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 19124 (Frankford · Juniata) medianAssessmentL&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 record8 events · exact dates, newest first
- L&I violationUNSAFE STRUCTURE
- L&I violationDECKS, BALCONIES, & EXTERIOR STAIRS
- InspectionL&I investigation
- PermitRoof Covering Replacement
- PermitAddition and/or Alteration
- PermitPlumbing
- PermitAlteration
- PermitPlumbing
Flags: 2 L&I violation rows marked OPEN. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$714/year estimated property tax
2026 taxable assessment $51,000 × 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 $161,300. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 3325310002026 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
3
Bathrooms
1
Stories
2
Interior
1,200 sqft
livable area
Lot
810 sqft
Basement
Partial, unfinished
city code G
Heat
Undetermined
city code H
Central air
No
Garage
1 space
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
Average
city code 4
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
4200 block of Neilson St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 4255 Neilson St · 4259 Neilson St
L&I licenses checked through Jul 25, 2026
No business or residential license records
No business license or residential registration matched this OPA parcel in the latest City data.
Open every source row 8 dated rows
- ViolationUNSAFE STRUCTURE
Case CF-2026-069162 · Violation VI-2026-042801 · Code PM15-108.1 · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- ViolationDECKS, BALCONIES, & EXTERIOR STAIRS
Case CF-2026-069162 · Violation VI-2026-042802 · Code PM15-304.1(L) · OPEN
The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.
- InvestigationL&I investigation
Case CF-2026-069162 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitRoof Covering Replacement
Permit GM-2023-006363 · Expired
For minor construction work at the subject property in accordance with all applicable provisions of the Philadelphia Code, all references codes and standards, and the attached EZ Standard, where included. Deviation from this standard shall result in permit revocation. A separate permit from the Philadelphia Department of Streets is required for any sidewalk and street closures. All means of pedestrian protection required at the site in accordance with the Philadelphia Building Code Chapter 33 shall be in place prior to start of work.
- PermitAddition and/or Alteration
Permit EP-2021-010540 · Expired
Installation of solar array in accordance with signed standard. Amendment: Please remove Bureau Veritas Letter as 3rd party inspector and replace with United Inspection. As the letter that is uploaded from Bureau Veritas they are no longer able to complete the inspection. They send us the letter stating they transfer over the permit to the agency of our choice.
- PermitPlumbing
Permit 1052136 · COMPLETED
INSTALLS STORM AND SANITARY CURB TRAPS FAI MAIN DRAIN AS PER 2004 PPC
- PermitAlteration
Permit 981390 · COMPLETED
ROOF REPLACEMENT - INSTALL A MODIFIED GRANULAR RUBBER ROOF SYSTEM. STRUCTURAL ALTERATION OR REPAIR IS EXPRESSLY PROHIBITED UNDER THIS PERMIT. PROHIBITED STRUCTURAL WORK INCLUDES ANY MODIFICATION TO EXTERIOR WALLS, PARTY WALLS, FLOOR/ROOF FRAMING OR FOUNDATIONS; UNDERPINNING AND EXCAVATIONS (I.E. DIGGING IN BASEMENT).
- PermitPlumbing
Permit 191278 · COMPLETED
INSTALL STORM & SANITARY CURB TRAPS, FRESH AIR INLETS, LAUNDRY TUB & WASTE LINE, KITCHEN SINK WASTE LINE
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 26, 2026, 12:42 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)