2026 assessment
$836K
OPA value, not a listing price
House report
509 Fairmount Ave
2,772 sqftRSA5built 1920
Property at a glanceApartment building
Owner-occupancy signal
ZIP 19123 area
Northern Liberties · Callowhill
500 block of Fairmount Ave
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$392K 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$392K 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$392K 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$516K 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$533K 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$533K 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$533K 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$736K 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$736K 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$836K 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$836K 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$912K 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 · 2020-10-22Change of UseThis 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 · 2021-01-19New construction, addition, GFA changeThis 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 · 2021-03-01Addition 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 · 2021-04-22Full DemolitionThis permit category usually covers partial or complete removal 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 · 2021-05-08Addition 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 ↗
- Permit · 2021-05-17Addition 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 · 2021-08-25AlterationsThis 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 · 2026-02-10Exterior Window and Door 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 · 2020-08-18ZONING REQUIRED FOR CONSTRUCTIONA 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 · 2020-08-18PARTIAL DEMOLITIONA 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 · 2020-08-18L&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 ↗
- L&I violation · 2022-03-26NEW WINDOW/DOORA 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 · 2022-03-26L&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 ↗
- Inspection · 2021-03-31L&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 ↗
- Inspection · 2021-04-01L&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 ↗
- Inspection · 2022-04-27L&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 ↗
- Inspection · 2022-06-01L&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 ↗
- Inspection · 2026-06-17L&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 ↗
- License · 2004-03-20WHELAN CHRISTOPHER & C L: Rental landlord or residential registration initially issuedA 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 ↗
- License · 2013-02-28WHELAN CHRISTOPHER & C L: Rental landlord or residential registration marked inactiveA 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 ↗
- Appeal · 2026-07-28LIRB Violation AppealA challenge or request reviewed through a City appeals process. Filing an appeal does not show who prevailed; read the decision, conditions, and related permit or violation.How Philadelphia L&I appeals work ↗
Property assessmentBlock median & rangeZIP 19123 (Northern Liberties · Callowhill) medianAssessmentL&I violationAppealPermitInspectionLicense
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 record21 events · exact dates, newest first
- AppealLIRB Violation Appeal
- InspectionL&I investigation
- PermitExterior Window and Door Replacement
- InspectionL&I investigation
- InspectionL&I investigation
- L&I violationNEW WINDOW/DOOR
- InspectionL&I investigation
- PermitAlterations
- PermitAddition and/or Alteration
- PermitAddition and/or Alterations
- PermitFull Demolition
- InspectionL&I investigation
- InspectionL&I investigation
- PermitAddition and/or Alteration
- PermitNew construction, addition, GFA change
- PermitChange of Use
- L&I violationZONING REQUIRED FOR CONSTRUCTION
- L&I violationPARTIAL DEMOLITION
- InspectionL&I investigation
- LicenseWHELAN CHRISTOPHER & C L: Rental landlord or residential registration marked inactive
- LicenseWHELAN CHRISTOPHER & C L: Rental landlord or residential registration initially issued
Flags: material assessment exemption; legal basis and term unverified · historical tax ledger through 2016 recorded $5K with a lien entry · 1 zoning/board appeal on record · latest deed has shared-name parties; relationship unverified. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$8,483/year estimated property tax
2026 taxable assessment $606,006 × 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 $911,900. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 0561480002026 OPA removes $230,194 from the taxable assessment through the owner-occupant exemption.
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 $5,071.21 and a lien entry. It is shown as historical context only.
2014$436.66 total · $0.00 principal · $194.15 interest · $72.48 penalty2015$791.00 total · $0.00 principal · $322.28 interest · $231.38 penalty2016$3,843.55 total · $3,452.96 principal · $51.80 interest · $34.53 penalty
For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”
Where the record looks off
Conflicts in City paperwork. Flags on the data, not the property.
Homestead exemption, mail goes elsewhere
The parcel claims the homestead exemption (owner lives here) while the tax bill mails to 1649 Denston Drive, Ambler Pa, 19002. Those two facts sit in tension on the record — there can be innocent reasons, but one of them is usually out of date.
The property, on paper
OPA physical field record.
Interior
2,772 sqft
livable area
Lot
1,644 sqft
Basement
Full
city code D
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
New / rehabbed
city code 2
New / rehabbed
Interior condition
New / rehabbed
city code 2
New / rehabbed
Quality grade
B-
assessor's grade
ABCDE
Zoning
RSA5
city zoning code
Zoning appeals
1
In Process · 2026
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
500 block of Fairmount Ave. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 507 Fairmount Ave · 511 Fairmount Ave
L&I license dates · data through Jul 23, 2026
Business licenses at this address Latest pull
What L&I has registered at this OPA parcel, newest initial license date first.
No L&I business license is on record at this address in data through Jul 23, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
WHELAN CHRISTOPHER & C LInactive
Rental · Initial issue date Mar 20, 2004 · Terminal license date Feb 28, 2013
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 21 dated rows
- AppealLIRB Violation Appeal
Appeal HA-2025-004625 · In Process
Need More Time
- InvestigationL&I investigation
Case CF-2022-025115 · PASSED
The cited inspection visit was marked passed.
- PermitExterior Window and Door Replacement
Permit GM-2026-000996 · Issued
EZ PERMIT STANDARDS WINDOWS & DOORS For Replacement of Exterior Windows & Doors without submitting plans by meeting the Conditions and Design Limitations below. Any deviations from this permit standard will result in permit revocation. **Existing Philadelphia Historic Property** Department of Licenses and Inspections will confirm Historical Commission has inspected installation prior to closing window violation(As per PHC conditions). To comply violation CF-2022-025115
- InvestigationL&I investigation
Case CF-2022-025115 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationL&I investigation
Case CF-2022-025115 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationNEW WINDOW/DOOR
Case CF-2022-025115 · Violation VI-2022-020492 · Code A-301.1/35 · COMPLIED
Resolution: COMPLIED - LICENSE/CERTIFICATE/REPORT OBTAINED City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationL&I investigation
Case CF-2022-025115 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitAlterations
Permit PP-2021-015172 · Expired
Installing main stack. Install branch drains for each fixture. Install waterlines to service each fixture.
- PermitAddition and/or Alteration
Permit EP-2021-004733 · Completed
Install 200amp service complete with ground wire throughout building for G.F.C.I outlets smoke detectors switches lighting and fixtures per N.E.C code 2014
- PermitAddition and/or Alterations
Permit MP-2021-000539 · Expired
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. (Install 2 systems with duct to all rooms. B-1-2 Floor Goodman 3 ton 57,000 btu 90 plus gas furnace, 3-4 floor Goodman 2 1/2 ton 45,00 btu 90 plus gas furnace, All bathroom exhaust duct (fan by other) Kitchen venting, Dryer venting).
- PermitFull Demolition
Permit ZP-2021-004002 · Issued
FOR THE DOCUMENTATION OF PARTIAL DEMOLITION OF REAR DECK ( SEE APPLICATION# RP-2021-005422 AND ZP-2020-010478 FOR REBUILT OF DECK) ON THE SAME LOT WITH EXISTING STRUCTURE REMAINS.SIZE AND LOCATION AS SHOWN IN THE APPLICATION
- InvestigationL&I investigation
Case CF-2020-052389 · PASSED
The cited inspection visit was marked passed.
- InvestigationL&I investigation
Case CF-2020-052389 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitAddition and/or Alteration
Permit RP-2020-012915 · Expired
Interior Renovation & Erection of new exterior rear deck.
- PermitNew construction, addition, GFA change
Permit ZP-2020-010478 · Issued
FOR THE ERECTION OF A REAR DECK ACCESSED FROM REAR OF 2ND FLOOR. SIZE AND LOCATION AS PER PLANS. FOR A SINGLE FAMILY HOUSEHOLD LIVING.
- PermitChange of Use
Permit ZP-2020-008017 · Issued
Residential - Household Living - Single-Family
- ViolationZONING REQUIRED FOR CONSTRUCTION
Case CF-2020-052389 · Violation VI-2020-028816 · Code A-301.1/64 · COMPLIED
Resolution: COMPLIED - PERMIT OBTAINED City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPARTIAL DEMOLITION
Case CF-2020-052389 · Violation VI-2020-028815 · Code A-301.1/6 · COMPLIED
Resolution: COMPLIED - PERMIT OBTAINED City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationL&I investigation
Case CF-2020-052389 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- License terminal eventWHELAN CHRISTOPHER & C L: Rental landlord or residential registration marked inactive
License 215928 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- License issue eventWHELAN CHRISTOPHER & C L: Rental landlord or residential registration initially issued
License 215928 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
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 24, 2026, 5:30 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)