2026 taxable assessment $0 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $1,392,700; it is not the 2026 billed-year value.
Property report
900-18 N Marshall St
22,502 sqft · RM1 · built 1987
School · Individual owner on record · fully tax-exempt (2026 OPA). On the 900 block of N Marshall St.
Property summary
Assessment$1,392,7002026 OPA assessment · 2027: $1,392,700
Last sale$5.5MRecorded 2021
Est. tax bill$0/year2026 OPA · full assessment exemption shown
Tax delinquency—Snapshot unavailable
Permits4Dated events in report
Violations3 openNo historical match in fetched records
“Open” reflects records available then historical records keep their source dates estimates are labeled
BlockReport AI · cited public records
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Property tax
The estimate, live balance, and back-tax record are different.
BlockReport can calculate the annual tax from the City’s taxable assessment. Payments, credits, interest, and a current amount due live separately in Philadelphia Tax Center.
A Tax Center balance is net of bills, payments, credits, interest, and adjustments. A credit—or an amount due—is not automatically “back taxes.”
OPA 7716734002026 OPA shows a zero or de minimis taxable assessment. The open assessment split does not establish the exemption's legal basis, continuing eligibility, or treatment after a transfer.
Historical delinquency sources No current conclusion
The June 2022 delinquency snapshot was not verifiably available in this cached report. No conclusion about a match—or today’s balance—can be drawn from that absence.
For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”
What stands out
From the public recordNew construction
Why it mattersbuilt new under a 2023 permit (reduced taxable assessment shown).
View supporting records →Records to verify together
Rule-based groupings across this property's dated public records. Each flag shows the records that belong in the same verification step and where the inference stops.
Records to verify together
More than one separately dated public record deserves a current-status check.
Evidence: 3 open L&I violations · failed L&I inspection activity in 2021, 2023, 2025, 2026
Limit: A screening signal, not a foreclosure prediction. Tax entries are historical and must be verified with Philadelphia Revenue.
Recent transition activity
The property has an unusually active paper trail worth monitoring for the next permit, inspection, deed, or listing.
Evidence: 4 permit events since 2023 · 1 zoning/board appeal since 2023
Limit: Record activity alone does not establish that a sale or redevelopment is planned.
Transparent record rules, not a score or forecast. Each flag is a prompt to verify the cited records, not a prediction or allegation.
Not a houseProperty report
This is a school, not a home, and OPA shows a full or near-full assessment exemption whose basis must be verified. A $0 assessment-based tax estimate does not prove the live Tax Center account has no prior-period balance or other charges. Homeowner investment tools are hidden; the assembled public-source record remains below.
3 open violations
What it is
School
School 1 Sty Masonry
Owner
Individual owner on record
Public / institutional
OPA tax treatment
Full assessment exemption shown
2026 OPA taxable assessment $0 · basis and live balance require separate verification
$ / sq ft
$62
below the $130 median for 12,035 commercial parcels citywide
Assessed value
$1,392,700
2026 OPA · 2027: $1,392,700
Interior area
22,502 sqft
Lot size
27,910 sqft
Built
1987
Zoning
RM1
City record timeline
Every dated deed, permit, inspection, license, violation, certification, and appeal—together.
The timeline combines the report’s transfer history with every successfully fetched L&I and zoning row. A date or status is the City’s filed record, not a statement that the condition remains current; use the official file for live detail.
- Recorded owner
- Individual owner on record
- L&I district
- —
- OPA account
- 771673400
What this record suggests
3 violations are still marked open in the assembled record. The date and status belong in a current L&I check before relying on them.
- AppealLIRB-H Other Health
Appeal HA-2024-005013 · Closed · Complete
See attached
- AppealZoning board appeal
Appeal 31137 · OPEN · Granted
SPECIAL EXCEPTION FOR THE EXPANSION OF EDUCATIONAL FACILITY FROM TENANT SPACE A TO TENANT SPACE B TO OCCUPY THE ENTIRE EXISTING DETACHED BUILDING. NO SIGN PERMIT ON THE PERMIT
Free record guide
How Philadelphia’s property system works
These explainers are free because the record only helps if you know what it can—and cannot—prove. Use the linked City guidance for the controlling rule.
Permits and inspections
A permit is the City’s authorization and review pathway for construction or repair work. No fetched permit is not proof that no work ever happened.
L&I inspections are scheduled at defined stages; final inspection and required certifications are separate steps in closing out applicable work.
How construction and repair permits work ↗See City inspection stages by permit type ↗Assessments and taxes
The OPA assessment is the City’s value on the tax roll—not an asking price, appraisal, or live account balance. The taxable assessment can differ from the full assessment because the City roll records exemptions or other treatment; the report keeps those fields separate.
Your annual estimate uses the taxable assessment. Payments, credits, interest, and the amount due are maintained separately in Tax Center.
How the Office of Property Assessment works ↗Philadelphia property-tax guidance ↗Violations, cases, and status check current status
An open row is a dated City status, not a diagnosis of current condition or a conclusion about the property. Read the case, notice, and any subsequent inspection together, then verify the live file.
How L&I code enforcement works ↗City violation and order types ↗Block context
900-18 N Marshall St sits on the 900 block of N Marshall St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 920 N Marshall St · 920 N Marshall St
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 9, 2026, 10:03 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. “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)