House report

4509 N 20th St

3 stories1,696 sqftRM1built 1940

Property at a glanceHouse

Entity-held

2026 assessment
$137K OPA value, not a listing price
From above · selected parcel outlined; choose a neighboring polygon to open it — imagery © Esri, Maxar
Open L&I record

6 violation rows marked OPEN in 2 active cases

The actual City titles, code sections, case posture, and latest recorded inspections are shown here instead of only an aggregate count.

Open City history ↗
Case CF-2021-088786

Notice Of Violation

IN VIOLATION

Opened Sep 14, 2021 · Latest inspection FAILED · Oct 1, 2024

  • Exterior Structure WallsPM15-304.6
  • Exterior Structure Roof DrainagePM15-304.7
Case CF-2023-094227

Notice Of Violation

IN VIOLATION

Opened Sep 12, 2023 · Latest inspection FAILED · Aug 11, 2025

  • New PlumbingA-301.1/54
  • Compl Conceal- Bldg Perm WorkA-402.1/1
  • Alter Interior PortionA-301.1/4
  • Install Fire Suppression SystemA-301.1/27

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.

$0$100K$200KZIP 19140 (Hunting Park · Nicetown–Tioga) median$142K2015201720192021202320252027
Property assessmentBlock median & rangeZIP 19140 (Hunting Park · Nicetown–Tioga) 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 record38 events · exact dates, newest first
  1. InspectionL&I investigation
  2. PermitAddition and/or Alteration
  3. PermitNew construction, addition, GFA change
  4. InspectionL&I investigation
  5. InspectionL&I investigation
  6. Deed / saleDeed / sale $90K
  7. InspectionL&I investigation
  8. InspectionL&I investigation
  9. L&I violationNEW PLUMBING
  10. L&I violationCOMPL CONCEAL- BLDG PERM WORK
  11. L&I violationALTER INTERIOR PORTION
  12. L&I violationINSTALL FIRE SUPPRESSION SYSTEM
  13. InspectionL&I investigation
  14. PermitAddition and/or Alterations
  15. LicenseDHI Fund: Vacant Residential Property / Lot landlord or residential registration marked inactive
  16. PermitAddition and/or Alteration
  17. PermitRough-In
  18. PermitAlterations
  19. PermitAddition and/or Alteration
  20. InspectionL&I investigation
  21. InspectionL&I investigation
  22. InspectionL&I investigation
  23. InspectionL&I investigation
  24. InspectionL&I investigation
  25. L&I violationEXTERIOR STRUCTURE WALLS
  26. L&I violationEXTERIOR STRUCTURE ROOF DRAINAGE
  27. L&I violationVACANT STRUCTURE & LAND
  28. L&I violationVACANT PROPERTIES
  29. InspectionL&I investigation
  30. InspectionL&I investigation
  31. PermitAddition and/or Alteration
  32. InspectionL&I investigation
  33. L&I violationEXTERIOR STRUCTURE WALLS
  34. L&I violationEXTERIOR STRUCTURE ROOF DRAINAGE
  35. L&I violationVACANT STRUCTURE & LAND
  36. L&I violationVACANT & OPEN
  37. PermitNew construction, addition, GFA change
  38. LicenseDHI Fund: Vacant Residential Property / Lot landlord or residential registration initially issued

Flags: 6 L&I violation rows marked OPEN · historical tax ledger through 2016 recorded $24K with a lien entry. Informational only. Not investment advice or a consumer report (FCRA).

Verify the public record

$1,919/year estimated property tax

2026 taxable assessment $137,100 × 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 $142,300. It is not the 2026 billed-year value.

Current City balanceCheck Tax Center

Payments, credits, interest, and the current amount due are maintained by the City.

OPA 132228800
Open Philadelphia Tax Center →Use “View period balance” to inspect each tax year.
Exemption classificationNo exemption shown

2026 taxable assessment equals the full assessed value.

Historical delinquency sources Record found

This parcel did not match the June 2022 delinquency snapshot. That absence does not confirm the account is current today.

A separate historical parcel ledger ending in 2016 records $23,607.39 and a lien entry. It is shown as historical context only.

1997$2,041.95 total · $501.79 principal · $865.58 interest · $35.13 penalty1998$1,625.26 total · $501.79 principal · $820.42 interest · $35.13 penalty1999$1,571.97 total · $501.79 principal · $775.26 interest · $35.13 penalty2000$1,518.68 total · $501.79 principal · $730.10 interest · $35.13 penalty2001$1,465.39 total · $501.79 principal · $684.94 interest · $35.13 penalty2002$1,412.11 total · $501.79 principal · $639.78 interest · $35.13 penalty2003$1,358.82 total · $501.79 principal · $594.62 interest · $35.13 penalty2004$1,305.53 total · $501.79 principal · $549.46 interest · $35.13 penalty2005$1,252.24 total · $501.79 principal · $504.30 interest · $35.13 penalty2006$1,198.94 total · $501.79 principal · $459.13 interest · $35.13 penalty2007$1,145.65 total · $501.79 principal · $413.97 interest · $35.13 penalty2008$1,092.36 total · $501.79 principal · $368.81 interest · $35.13 penalty2009$1,039.07 total · $501.79 principal · $323.65 interest · $35.13 penalty2010$985.78 total · $501.79 principal · $278.49 interest · $35.13 penalty2011$1,022.46 total · $551.46 principal · $256.43 interest · $38.60 penalty2012$1,000.13 total · $572.71 principal · $214.77 interest · $40.09 penalty2013$972.23 total · $593.30 principal · $169.09 interest · $41.53 penalty2014$914.01 total · $593.45 principal · $117.97 interest · $43.54 penalty2016$684.81 total · $545.71 principal · $8.18 interest · $5.46 penalty

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.

Stories
3
Interior
1,696 sqft livable area
Lot
1,351 sqft
Basement
Full city code D
Heat
Undetermined city code H
Central air
No
Exterior condition
Average city code 4
Interior condition
Average city code 4
Quality grade
C assessor's grade
Zoning
RM1 city zoning code

OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.

Recorded owner

Who's behind it

Horizon Homes Properties LLC · corporate / LLC owner

• Tax bills mail to 1844 E Ridge Pike Suite 108, Royersford PA, 19468 — outside Philadelphia

Block context

4500 block of N 20th St. Compare parcels, ownership, and public-record history.

See the whole block →

Next door: 4507 N 20th St  ·  4511 N 20th St

Business licenses at this address Latest pull

What L&I has registered at this OPA parcel, newest initial license date first.

Open the City record ↗

No L&I business license is on record at this address in data through Jul 28, 2026.

Landlord and residential filings

These are property registrations or landlord filings, not businesses operating at this address.

DHI FundInactive

Vacant Residential Property / Lot · Initial issue date Jun 4, 2020 · Terminal license date Aug 2, 2023

A license is an L&I registration, not proof that a business is open, operating today, or located at this storefront. Dates are license dates. Events are deduped by parcel, business identity, and license type, so a renewal is not shown as another opening. Other permit and filing types remain in the full source ledger.

Open every source row 38 dated rows
  1. InvestigationL&I investigation

    Case CF-2023-094227 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  2. PermitAddition and/or Alteration

    Permit CP-2024-006243 · Issued

    LEVEL II ALTERATIONS AND LEGALIZATION OF ADDITION ASSOCIATED WITH PREVIOUSLY EXPIRED PERMIT CP-2021-000202 TO CREATE A THREE (3) FAMILY DWELLING IN AN EXISTING BUILDING AS PER APPROVED PLANS. BUILDING TO BE FULLY SPRINKLERED. *2018 IEBC REVIEW* **SEPARATE PERMITS REQUIRED FOR MEP & FIRE SUPPRESSION WORK** AMENDMENT APPROVED 7/13/26 AMEND ALTERATIONS/ADDITION PERMIT CP-2024-006243 FOR CHANGE OF OWNERSHIP AS PER ATTACHED DOCUMENTS.

  3. PermitNew construction, addition, GFA change

    Permit ZP-2025-000356 · Issued

    For the erection of an addition to the rear and above an existing attached structure, size and location as shown on plan/application.

  4. InvestigationL&I investigation

    Case CF-2021-088786 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  5. InvestigationL&I investigation

    Case CF-2023-094227 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  6. Recorded transfer$90K transfer

    2024

  7. InvestigationL&I investigation

    Case CF-2023-094227 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  8. InvestigationL&I investigation

    Case CF-2023-094227 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  9. ViolationNEW PLUMBING

    Case CF-2023-094227 · Violation VI-2023-069344 · Code A-301.1/54 · OPEN

    The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.

  10. ViolationCOMPL CONCEAL- BLDG PERM WORK

    Case CF-2023-094227 · Violation VI-2023-069346 · Code A-402.1/1 · OPEN

    The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.

  11. ViolationALTER INTERIOR PORTION

    Case CF-2023-094227 · Violation VI-2023-069343 · Code A-301.1/4 · OPEN

    The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.

  12. ViolationINSTALL FIRE SUPPRESSION SYSTEM

    Case CF-2023-094227 · Violation VI-2023-069345 · Code A-301.1/27 · OPEN

    The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.

  13. InvestigationL&I investigation

    Case CF-2023-094227 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  14. PermitAddition and/or Alterations

    Permit FP-2023-000057 · Expired

    FOR THE INSTALLATION OF A FIRE SUPPRESSION SYSTEM IN ACCORDANCE WITH NFPA 13R THROUGHOUT THE ENTIRE BUILDING WITH 2” FIRE SERVICE AND 2" BACKFLOW PREVENTION ASSEMBLY. ALL WORK SHALL COMPLY WITH THE APPROVED PLANS. ALL WORK SHALL BE PERFORMED BY A FIRE SUPPRESSION CONTRACTOR LICENSED BY THE CITY OF PHILADELPHIA.

  15. License terminal eventDHI Fund: Vacant Residential Property / Lot landlord or residential registration marked inactive

    License 842910 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  16. PermitAddition and/or Alteration

    Permit EP-2023-000180 · Expired

    Install new fire alarm system as per plans as per 2016 NFPA 72.

  17. PermitRough-In

    Permit FP-2023-000149 · Completed

    Rough-In Permit for FP-2023-000057 (CP-2021-000202)

  18. PermitAlterations

    Permit PP-2022-009527 · 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.

  19. PermitAddition and/or Alteration

    Permit EP-2022-005992 · Expired

    Rewiring of entirely open framed apartment complex. Includes wiring for canless recessed lighting, all boxes for required receptacles, and switches. Also includes new 200 amp service, 4 gang meter base, 3 100 amp panels to each apartment, and 1 60 amp house panel as per 2017 nec

  20. InvestigationL&I investigation

    Case CF-2021-088786 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  21. InvestigationL&I investigation

    Case CF-2021-088786 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  22. InvestigationL&I investigation

    Case CF-2021-088786 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  23. InvestigationL&I investigation

    Case CF-2021-026446 · PASSED

    The cited inspection visit was marked passed.

  24. InvestigationL&I investigation

    Case CF-2021-026446 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  25. ViolationEXTERIOR STRUCTURE WALLS

    Case CF-2021-088786 · Violation VI-2021-063876 · Code PM15-304.6 · OPEN

    The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.

  26. ViolationEXTERIOR STRUCTURE ROOF DRAINAGE

    Case CF-2021-088786 · Violation VI-2021-063874 · Code PM15-304.7 · OPEN

    The individual violation row was marked open in the assembled City file; verify the live notice and any later inspection.

  27. ViolationVACANT STRUCTURE & LAND

    Case CF-2021-088786 · Violation VI-2021-063877 · Code PM15-301 · COMPLIED

    Resolution: COMPLIED - BY ENFORCEMENT ACTION City marked this violation complied with; check the resolution date and live case for what was accepted.

  28. ViolationVACANT PROPERTIES

    Case CF-2021-088786 · Violation VI-2021-063873 · Code PM15-901.1 · COMPLIED

    Resolution: COMPLIED - BY ENFORCEMENT ACTION City marked this violation complied with; check the resolution date and live case for what was accepted.

  29. InvestigationL&I investigation

    Case CF-2021-026446 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  30. InvestigationL&I investigation

    Case CF-2021-026446 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  31. PermitAddition and/or Alteration

    Permit CP-2021-000202 · Expired

    FOR ADDITIONS, ALTERATIONS AND CHANGE OF OCCUPANCY PER APPROVED PLANS FOR USE AS MULTI-FAMILY HOUSEHOLD LIVING (THREE DWELLING UNITS). BUILDING TO BE FULLY SPRINKLERED WITH NFPA 13R MINIMUM. SEPARATE PERMITS REQUIRED FOR MECHANICAL, ELECTRICAL, PLUMBING AND FIRE SUPPRESSION.

  32. InvestigationL&I investigation

    Case CF-2021-026446 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  33. ViolationEXTERIOR STRUCTURE WALLS

    Case CF-2021-026446 · Violation VI-2021-019891 · Code PM15-304.6 · CLOSED

    Resolution: CLOSED - REISSUED/REWRITTEN City marked the record closed; open the case for the closing reason.

  34. ViolationEXTERIOR STRUCTURE ROOF DRAINAGE

    Case CF-2021-026446 · Violation VI-2021-019890 · Code PM15-304.7 · CLOSED

    Resolution: CLOSED - REISSUED/REWRITTEN City marked the record closed; open the case for the closing reason.

  35. ViolationVACANT STRUCTURE & LAND

    Case CF-2021-026446 · Violation VI-2021-019888 · Code PM15-301 · CLOSED

    Resolution: CLOSED - REISSUED/REWRITTEN City marked the record closed; open the case for the closing reason.

  36. ViolationVACANT & OPEN

    Case CF-2021-026446 · Violation VI-2021-019889 · Code PM15-108.2 · CLOSED

    Resolution: CLOSED - REISSUED/REWRITTEN City marked the record closed; open the case for the closing reason.

  37. PermitNew construction, addition, GFA change

    Permit ZP-2020-007384 · Expired

    For the erection of an addition to the rear and above an existing attached structure, size and location as shown on plan/application.

  38. License issue eventDHI Fund: Vacant Residential Property / Lot landlord or residential registration initially issued

    License 842910 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

Where this comes from

Methodology & freshness

This report was assembled Jul 28, 2026, 10:52 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)