2026 assessment
$1.4M
OPA value, not a listing price
House report
4312-14 Osage Ave
Research this property with Analyst →6 bd4,858 sqftRTA1built 1925
Property at a glanceHouse
Owner-occupancy signal
ZIP 19104 area
University City · West Powelton
4300 block of Osage 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$345K 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$345K 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$345K 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$607K 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$630K 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$630K 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$630K 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$630K 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$630K 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$1.4M 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$1.4M 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$1.7M 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 · 2022Deed / sale $1.0MA 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 · 2011-04-14PlumbingThis 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 · 2022-08-12AlterationsThis 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 · 2022-11-23Change 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 · 2022-12-20Interior Non-Load-Bearing Wall Demo.This 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 · 2023-03-10Addition 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 · 2023-04-10Addition 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 · 2023-04-14Addition 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 · 2023-04-14AlterationsThis 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 · 2026-04-22Roof 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 ↗
- Permit · 2026-05-08Roof 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 ↗
- License · 2011-03-08KENNETH T THOMFORDE (KEN'S CONTRACTING LLC): 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 · 2015-04-29KENNETH T THOMFORDE (KEN'S CONTRACTING LLC): 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 ↗
Property assessmentBlock median & rangeZIP 19104 (University City · West Powelton) medianAssessmentDeed / salePermitLicense
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 record13 events · exact dates, newest first
- PermitRoof Covering Replacement
- PermitRoof Covering Replacement
- PermitAddition and/or Alteration
- PermitAlterations
- PermitAddition and/or Alterations
- PermitAddition and/or Alteration
- PermitInterior Non-Load-Bearing Wall Demo.
- PermitChange of Use
- PermitAlterations
- Deed / saleDeed / sale $1.0M
- LicenseKENNETH T THOMFORDE (KEN'S CONTRACTING LLC): Rental landlord or residential registration marked inactive
- PermitPlumbing
- LicenseKENNETH T THOMFORDE (KEN'S CONTRACTING LLC): Rental landlord or residential registration initially issued
Flags: material assessment exemption; legal basis and term unverified. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$11,898/year estimated property tax
2026 taxable assessment $850,000 × 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 $1,701,600. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 2720604002026 OPA removes $550,000 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
6
Interior
4,858 sqft
livable area
Lot
5,500 sqft
Basement
Full, unfinished
city code C
Heat
Hot water / radiators
city code B
Central air
No
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
New / rehabbed
city code 2
New / rehabbed
Quality grade
B
assessor's grade
ABCDE
Zoning
RTA1
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
4300 block of Osage Ave. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 4308-10 Osage Ave · 4316 Osage Ave
L&I license dates · data through Jul 29, 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 29, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
KENNETH T THOMFORDE (KEN'S CONTRACTING LLC)Inactive
Rental · Initial issue date Mar 8, 2011 · Terminal license date Apr 29, 2015
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 13 dated rows
- PermitRoof Covering Replacement
Permit GM-2026-003657 · Issued
For the Installation of New Roof Coverings on Existing Roofs as per attached standard. Deviations from these standards require submission of construction and site plans. **Existing Philadelphia Historic Property**
- PermitRoof Covering Replacement
Permit GM-2026-003082 · Issued
EZ PERMIT RE-ROOFING- For the Installation of New Roof Coverings on Existing Roofs as per attached standard. Deviations from these standards require submission of construction and site plans. Replacement of sheathing in excess of 10% of roof area shall not be applicable to the EZ permit process. **Existing Philadelphia Historic Property** This permit application for new roofing is for the flat roof areas only on the building. This permit application does not approve any work on the slate mansard section of the roof(As per PHC conditions).
- PermitAddition and/or Alteration
Permit EP-2023-003162 · Completed
Replace all knob-and-tube and/or cloth-wrapped or unsafe wiring in main building as per 2017 NEC
- PermitAlterations
Permit PP-2023-005025 · Completed
Install new main drain in basement. Install new stacks as needed. Install small waste lines. Install water lines to all new fixtures. Install 18 new fixtures.
- PermitAddition and/or Alterations
Permit MP-2023-001237 · Completed
EZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from these standards require submission of construction and site plans. *Property is historically designated and listed on the Philadelphia Register of Historic Places. Outdoor units should be located in areas not visible from the public right of way* Install (4) heat pump systems complete with ducts. 2-1.5-ton, 2-2 ton 4312 Osage Outdoor units (3) on roof of 4314 2nd & 3rd floor front- 18,000 btu AHRI# 204901333 14 SEER 11.5 EER 2nd & 3rd floor rear- 24,000 btu AHRI# 204901424 14.5 SEER 11.5 EER 1st floor 18,000 btu AHRI# 204901333 14 SEER 11.5 EER (14) total supply diffusers 4314 Osage Outdoor unit on side at walkway 24,000 btu AHRI# 204901424 14.5 SEER 11.5 EER (3-4) supply diffusers
- PermitAddition and/or Alteration
Permit RP-2023-000023 · Completed
***AMENDMENT APPROVED ON 4/16/2023: TO AMENDMENT PREVIOUSLY APPROVED BUILDING PERMIT # RP-2023-000023, TO ADD SISTERING OF JOISTS AND THE REMAINING PERMIT SAME AS PREVIOUSLY APPROVED. SIZE AND LOCATION AS SHOWN ON THE PLANS*** FOR INTERIOR ALTERATION OF AN EXISTING STRUCTURE TO CONTINUOUS USE AS SINGLE-FAMILY DWELLING. SIZE AND LOCATION AS SHOWN ON THE PLANS. ** SEPARATE PERMIT REQUIRE FOR ELECTRICAL, PLUMBING AND MECHANICAL ** ***ALL WORK SHALLTO BE DONE IN ACCORDANCE WITH PHILADELPHIA HISTORICAL COMMISSION'S GUIDELINES AND APPROVED PLAN ***
- PermitInterior Non-Load-Bearing Wall Demo.
Permit GM-2022-010202 · Completed
For the interior demolition of non-bearing partition walls and ceiling in accordance with the attached EZ Permit Interior Demolition Standard. Failure to comply with the attached EZ Permit Interior Demolition Standard shall result in revocation of this permit as per PHC. Separate permits are required for building, plumbing and electrical work and the installation of heating/cooling appliances.
- PermitChange of Use
Permit ZP-2022-013093 · Issued
Residential - Household Living - Single-Family
- PermitAlterations
Permit PP-2022-011942 · Completed
Replace main drain from cleanout to cast iron leaving house
- Recorded transfer$1.0M transfer
2022
- License terminal eventKENNETH T THOMFORDE (KEN'S CONTRACTING LLC): Rental landlord or residential registration marked inactive
License 527085 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- PermitPlumbing
Permit 335868 · COMPLETED
METER REDUCTION
- License issue eventKENNETH T THOMFORDE (KEN'S CONTRACTING LLC): Rental landlord or residential registration initially issued
License 527085 · 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 30, 2026, 7:30 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)