2026 assessment
$1.2M
OPA value, not a listing price
Commercial property report
518-20 Knorr St
2 stories6,200 sqftCMX2built 1988
Property at a glanceCommercial
518 Knorr LLC
2027 published assessment
$1.6M
Future roll, not the current tax bill
Location
500 block of Knorr St
ZIP 19111
Neighborhood area
Fox Chase · Burholme
Approximate · based on ZIP 19111
Assessment and City record timeline
The line tracks this property’s published City assessment. Markers show deeds, permits, inspections, licenses, violations, certifications, and appeals on their recorded dates. Select one to read the filing.
Assessments are tax-roll values, not sale prices or appraisals. OPA has published a 2027 assessment of $1,550,000. It is not yet the billed-year tax basis.
- OPA assessment · 2016$744K 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$744K 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$820K 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$1.5M 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$1.5M 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$1.5M 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$1.5M 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$1.6M 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$1.6M 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$1.2M 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$1.2M 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$1.6M 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 · 2009-06-09Addition 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 · 2017-09-26Major alterationA broad legacy permit work category for a substantial building alteration. It can include changed layouts, partitions, fixtures, finishes, structural work, or occupancy-related work, but only the approved scope and plans say what this permit actually authorized; separate trade permits may be required.What Philadelphia building permits can cover ↗
- Permit · 2018-01-03MechanicalThis 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 · 2018-01-08ElectricalThis 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 · 2018-02-28PlumbingThis 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 · 2018-10-09ElectricalThis 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 · 2020-03-03New 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 ↗
- License · 1999-07-16RENAL TREATMENT CENTERS: Dumpster License - Private Property L&I license filing 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 ↗
- Certification · 2022-07-12Fire Alarm 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 assessmentAssessmentPermitLicenseCertification
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 record9 events · exact dates, newest first
- CertificationFire Alarm Certification
- PermitNew Construction
- PermitElectrical
- PermitPlumbing
- PermitElectrical
- PermitMechanical
- PermitMajor alteration
- PermitAddition and/or Alteration
- LicenseRENAL TREATMENT CENTERS: Dumpster License - Private Property L&I license filing initially issued
Verify the public record
Property tax
$17,358/year estimated property tax
2026 taxable assessment $1,240,000 × 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 $1,550,000. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 8820006502026 taxable assessment equals the full assessed value.
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.”
Property report
Commercial property
Commercial, recorded in the City's commercial category. The public record and owner trail follow.
What it is
Commercial
Health Fac Med Cent Mason
Owner
518 Knorr LLC
$ / sq ft
$250
above the $151 median for 7,668 commercial parcels citywide
Interior area
6,200 sqft
Lot size
12,100 sqft
Stories
2
Built
1988
Zoning
CMX2
Recorded owner
Who's behind it
518 Knorr LLC · corporate / LLC owner
• Tax bills mail to 89 Cart Street, Binghamton NY, 13901 — outside Philadelphia
Block context
500 block of Knorr St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 514-16 Knorr St · 510 Knorr St
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.
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 9 dated rows
- CertificationFire Alarm Certification
Certification BC-2022-009610 · Certified
Expires 2023-07-12
- PermitNew Construction
Permit 1029561 · Expired
INSTALL FIRE ALARM SYSTEM COMPLETE WITH FACP, HORN/STROBES, PULL STATIONS PER NFPA 72(EAST DIST)
- PermitElectrical
Permit 916860 · COMPLETED
TO RETROFIT THE FOLLOWING LISTED LIGHT FIXTURES AND TO INSTALL LIGHT SENSORS IN PLACE OF EXISTING SWITCHES. ALL EXISTING CIRCUITRY TO BE REUSED AS IS: (20)BATTERY BACK UP FOR 2X4 AND 2X2 912) RECESSED LIGHT (22)STRIP FIXTURE (66) RETROFIT KIT (16) 2X2 EM BACK UP (22) WALL MOUNT SENSOR IN EXISTNG BOX (4)DIMMER INSTALL IN EXISTING BOX. PER 2017 NEC.
- PermitPlumbing
Permit 821135 · COMPLETED
ALTERATIONS: INTERIOR PLUMBING;HEALTH CARE; WATER PIPING FOR NEW BATHROOM AND SINKS-THE INSTALLATION SHALL COMPLY WITH THE PHILADEPHIA PLUMBING CODE 2004
- PermitElectrical
Permit 820971 · COMPLETED
REMOVE AND REPLACE LIGHTING, RECEPTACLES AND NURSE CALL UNIT PER 2008 NEC (HEALTH CARE) NO FIRE ALARM WORK
- PermitMechanical
Permit 831176 · COMPLETED
MECHANICAL DEMOLITION AS PER APPROVED PLANS. MECHANICAL WORK TO INCLUDE EXHAUST FAN, RELOCATE REGISTERS, AND DUCTWORK AS PER APPROVED PLANS. SEPARATE PERMIT REQUIRED FOR ELECTRICAL AND PLUMBING WORK.
- PermitMajor alteration
Permit 785561 · COMPLETED
NO CHANGE IN USE AND OCCUPANCY CLASSIFICATION. INTERIOR ALTERATIONS (PRESCRIPTIVE METHOD) AS PER APPROVED PLANS. SEPARATE PERMIT REQUIRED FOR ANY MEP WORK. NO ALTERATIONS WORK ON THIS PERMIT.
- PermitAddition and/or Alteration
Permit 219677 · Expired
REPLACE EXISTING 208/120V THREE PHASE-4W (42)CIRCUIT- CIRCUIT BREAKER PANEL WITH NEW....... IN ACCORDANCE WITH 2005 NEC
- License issue eventRENAL TREATMENT CENTERS: Dumpster License - Private Property L&I license filing initially issued
License 279534 · Active
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
- Imagery: Street photo © Google · Aerial © Esri, Maxar
Methodology & freshness
This report was assembled Jul 24, 2026, 5:10 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)