2026 taxable assessment $23,272,320 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $26,560,800; it is not the 2026 billed-year value.
Commercial property report
3520-50 Market St
5 stories · 87,860 sqft · CMX4 · built 1986
Offices · Mref II 3550 Market LP · assessed $25M (2026) · 2027 OPA assessment $27M. On the 3500 block of Market St.
BlockReport AI · cited public records
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Property summary
Assessment$25,296,0002026 OPA assessment · 2027: $26,560,800
Last sale—No sale value available
Est. tax bill$325,766/year2026 taxable assessment · full-value scenario $354,093/year · basis and term unverified
Tax delinquency—Snapshot unavailable
Permits8Dated events in report
Violations1 openNo historical match in fetched records
“Open” reflects records available then historical records keep their source dates estimates are labeled
Question or correct this record
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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 8832095202026 OPA taxes $23,272,320 of $25,296,000 assessed. The assessment fields alone do not identify a program, approval date, expiration, or buyer eligibility.
See the assessment math →Applying the same rate to the billed-year full assessment. OPA's numeric split does not say when or whether the current treatment changes.
See the assessment math →Historical delinquency sources Record found
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.
A separate historical parcel ledger ending in 2016 records a balance and a lien entry. It is shown as historical context only.
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
Record summarynew construction appears in a 2023 permit with a reduced taxable assessment shown.
View supporting records →The property record, over time
Every dated deed, permit, inspection, license, violation, certification, and appeal is placed on the City’s annual assessment line. Select a point to read what happened; the line is an assessment history—not a sale-price chart or appraisal. OPA has also published a 2027 assessment of $26,560,800; it is not yet the billed-year tax basis.
Assessment history · all dated City records marked on the line
- OPA assessment · 2016$13M 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$13M 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$21M 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$21M 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$22M 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$22M 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$22M 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$26M 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$26M 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$25M 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$25M 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$27M 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 ↗
- Appeal · 2010-05-05Zoning board 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 ↗
- Appeal · 2019-08-21Zoning board 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 assessmentAssessmentAppeal
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.
Every dated record2 events · exact dates, newest first
- AppealZoning board appeal
- AppealZoning board appeal
Commercial propertyProperty report
This is a offices, recorded under the city's offices category. The homeowner tools (rent estimate, homestead playbook) don't apply, so they're hidden. The full record and owner trail are below.
historical lien entry · through 2016 1 open violation
What it is
Offices
Off Bld N/Pkg N/Com Mason
Owner
Mref II 3550 Market LP
OPA tax treatment
Assessed $25M
Taxable assessment on the roll
$ / sq ft
$302
above the $143 median for 882 offices parcels citywide
Corridor
36th Street and vicinity
city commercial corridor
Assessed value
$25,296,000
2026 OPA · 2027: $26,560,800
Interior area
87,860 sqft
Lot size
17,812 sqft
Stories
5
Built
1986
Zoning
CMX4
Records behind the chart
Browse the source ledger
The chart above is the primary timeline. This drawer preserves every underlying dated row and its filed status for source-level review.
Browse 2 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- AppealZoning board appeal
Appeal 37343 · OPEN · Granted
PERMIT FOR THE ERECTION OF ON ONE (1) STATICALLY-ILLUMINATED, ACCESSORY WALL SIGN ON THE EXISTING BUILDING SIGN IS ACCESSORY TO BUSINESS AND PROFESSIONAL OFFICES, RETAIL SALES AND COMMERICAL SERVICE USE AS PREVIOUSLY APPROVED
- AppealZoning board appeal
Appeal 11053 · CLOSED · Granted
PERMIT FOR REMOVAL OF EXISTING SIGNAGE AND ERECTION OF TWO (2) FLATWALL SIGNS (PIN MOUNTED AND VINYL LETTERS), WITH ONE (1) SIGN TO BE LOCATED ABOVE THE BOTTOM OF THE SECOND FLOOR, ACCESSORY TO MEDICAL OFFICES WITHIN AN EXISTING OFFICE BUIL
What this record suggests
1 violation is still marked open in the assembled record. The date and status belong in a current L&I check before relying on them.
Who's behind it
Mref II 3550 Market LP · corporate / LLC owner
• Tax bills mail to 100 Front St Ste 1500, Conshohocken PA, 19428 — outside Philadelphia
Block context
3520-50 Market St sits on the 3500 block of Market St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 3508-18 Market St · 3500-06 Market 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
- Imagery — Street photo © Google · Aerial © Esri, Maxar
Methodology & freshness
This report was assembled Jul 9, 2026, 9:59 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)