2026 taxable assessment $13,400 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $18,300; it is not the 2026 billed-year value.
Land report
5900 Windsor St
Vacant lot · Construction Construction LLC · assessed $13K (2026) · 2027 OPA assessment $18K. On the 5900 block of Windsor St.
Property summary
Assessment$13,4002026 OPA assessment · 2027: $18,300
Last sale$35KRecorded 2023
Est. tax bill$188/year2026 taxable assessment × 1.3998%
Tax delinquency$12KCity snapshot · Jun 2022
Permits0Every fetched City permit
Violations0 open13 historical across 5 cases
“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 8850182002026 taxable assessment equals the full assessed value.
Historical delinquency sources Record found
$12,204.92 was recorded for this parcel in Philadelphia's June 2022 delinquency snapshot for 1997–2021. That amount may have been paid, reduced, or increased since; it is not a current payoff figure.
$3,887.83 principal$5,127.41 interest$270.56 penalty$2,919.12 other charges
The snapshot’s 2022 context used $9,900 total assessment, $9,900 taxable, and $0 exempt/abated. Those historical fields can differ from today’s OPA exemption status.
A separate historical parcel ledger ending in 2016 records $8,661.82 and a lien entry. It is shown as historical context only.
1997$1,277.34 total · $380.14 principal · $655.74 interest · $26.61 penalty1998$1,236.97 total · $380.14 principal · $621.53 interest · $26.61 penalty1999$1,196.60 total · $380.14 principal · $587.32 interest · $26.61 penalty2000$1,156.22 total · $380.14 principal · $553.10 interest · $26.61 penalty2001$285.73 total · $91.23 principal · $124.52 interest · $6.39 penalty2002$276.04 total · $91.23 principal · $116.31 interest · $6.39 penalty2003$266.35 total · $91.23 principal · $108.10 interest · $6.39 penalty2004$256.66 total · $91.23 principal · $99.89 interest · $6.39 penalty2005$246.97 total · $91.23 principal · $91.68 interest · $6.39 penalty2006$237.29 total · $91.23 principal · $83.47 interest · $6.39 penalty2007$227.60 total · $91.23 principal · $75.26 interest · $6.39 penalty2008$230.86 total · $97.31 principal · $71.52 interest · $6.81 penalty2009$220.53 total · $97.31 principal · $62.77 interest · $6.81 penalty2010$210.19 total · $97.31 principal · $54.01 interest · $6.81 penalty2011$217.32 total · $106.95 principal · $49.73 interest · $7.49 penalty2012$212.98 total · $111.07 principal · $41.65 interest · $7.77 penalty2013$207.57 total · $115.07 principal · $32.79 interest · $8.05 penalty2014$251.82 total · $100.17 principal · $19.53 interest · $7.01 penalty2015$241.19 total · $100.17 principal · $10.52 interest · $7.01 penalty2016$205.59 total · $104.64 principal · $1.56 interest · $1.05 penalty
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 recordHistory
Why it mattersInspection passed (2006); 4 L&I violations (2007); L&I: 1 failed, 1 passed (2007); 3 L&I violations (2009); 4 L&I violations (2010); 2 L&I violations (2011).
View supporting records →City Property History
Fetched L&I and zoning records
Every row successfully fetched for this report is counted below. Dataset availability and matching can differ from the City's interactive file; use the official link for current detail.
- Recorded owner
- Construction Construction LLC
- Tax mailing address
- 5911 WINDSOR STREET, PHILADELPHIA PA, 19143
- L&I district
- SOUTH
- Building ID (BIN)
- —
- OPA account
- 885018200
Permits0No match
Violation cases513 violation records · 0 open
Investigations31 failed · 2 passed · 0 closed
Building certifications0No match
Business licenses0No match
Appeals0No match
PermitsPermit number, issued date, work and City status0
No permits matched this parcel in the fetched City dataset.
Violation cases13 individual violation records; resolved history remains visible5
Case 106259CLOSED
STANDARD · Opened Mar 22, 2007 · completed Sep 28, 2007
- EXT A-VACANT LOT CLEAN/MAINTAIViolation 523615Mar 20, 2007 COMPLIED
- PROSEC- STD INFOViolation 523613Mar 20, 2007 COMPLIED
- LICENSE-VAC LOTViolation 523614Mar 20, 2007 COMPLIED
- VACANT LOT STANDARDViolation 523616Mar 20, 2007 COMPLIED
Case 209742CLOSED
STANDARD · Opened Aug 7, 2009 · completed May 19, 2010
- VACANT LOT STANDARDViolation 1418396Aug 7, 2009 COMPLIED
- LICENSE - VACANT LOTViolation 1418395Aug 7, 2009 COMPLIED
- CLIP VIOLATION NOTICEViolation 1418394Aug 7, 2009 COMPLIED
Case 235909CLOSED
STANDARD · Opened May 19, 2010 · completed Sep 3, 2010
- CLIP VIOLATION NOTICEViolation 1776209May 19, 2010 COMPLIED
- VACANT LOT STANDARDViolation 1776210May 19, 2010 COMPLIED
Case 235910CLOSED
STANDARD · Opened May 19, 2010
- CLIP VIOLATION NOTICEViolation 1689682May 19, 2010 CLOSEDCASE
- LICENSE - VACANT LOTViolation 1689683May 19, 2010 CLOSEDCASE
Case 280978CLOSED
STANDARD · Opened Jun 8, 2011 · completed Aug 17, 2011
- EXT A-VACANT LOT CLEAN/MAINTAIViolation 2101207Jun 8, 2011 COMPLIED
- CLIP VIOLATION NOTICEViolation 2101206Jun 8, 2011 COMPLIED
InvestigationsEvery inspector visit, including CLOSED outcomes3
HCEU INSPCase 57013
Mar 29, 2006 PASSED
HCEU INSPCase 106259
Mar 20, 2007 FAILED
HCEU INSPCase 106259
Mar 20, 2007 PASSED
Building certificationsInspection result and filed expiration date by L&I building ID0
No building certifications matched this parcel in the fetched City dataset.
Business licensesHistorical and active licenses are both retained0
No business licenses matched this parcel in the fetched City dataset.
AppealsApplication status and decision are separate City fields0
No appeals matched this parcel in the fetched City dataset.
City of Philadelphia OPA, L&I and Zoning Board records, shown as filed. A CLOSED investigation is an outcome label, not a missing visit; an appeal's application status and decision may differ.
Legal due diligence
What this record proves—and what it does not.
These checks are triggered by this property’s actual City rows. They identify the controlling document to verify; they do not declare a use legal, a building safe, or title clear.
1 resolve before relying
1 verify
1 favorable dated record
Resolve before relyingA dated tax balance needs a current payoff$12,204.92 was recorded in the City’s 2022-06 delinquency snapshot for 1997–2021.
Why it mattersThat is historical evidence, not today’s amount due. A current exemption, payment, credit, or assistance agreement can coexist with an older snapshot row.
Verify nextCheck period balances and request a dated Property Payoff statement for settlement.
Open the controlling City guidance ↗VerifyFailed inspections are dated events—not the current condition1 failed, 2 passed, and 0 CLOSED investigation outcomes are in the fetched history; the latest dated visit was FAILED on Mar 20, 2007.
Why it mattersA PASSED or FAILED value applies to that inspection visit. CLOSED is a separate source status; none of the three alone proves the parent permit or violation case closed—or describes today’s condition.
Verify nextOpen the parent case/permit for each material failure and confirm its later disposition.
Open the controlling City guidance ↗Favorable dated recordNo open violation; closed history remains relevantThe fetched record shows 0 open and 13 historical violations across 5 cases.
Why it mattersA closed case is materially better than an open one, but it does not by itself prove that every altered use, unit, or concealed condition matches today’s approvals.
Verify nextUse the closed cases to target the inspection and occupancy-file review.
Open the controlling City guidance ↗Closing file: checks no public-record summary can replace3 documents/searches to assign before settlement
Property Sales Certification
The seller must obtain Philadelphia’s certificate showing the base zoning, last use in the zoning record, and open violations. The City warns that it does not prove Building Code occupancy or show zoning overlays.
Next: Obtain the fresh certificate and compare it with the CO, permits, and Atlas overlays.
Official guidance ↗Date-effective City Property Payoff
The Tax Center Property Payoff covers Real Estate Tax, Commercial Trash, and L&I abatement-work invoices. Philadelphia says it does not include business-tax debts or liens, water and sewer charges, or fines for code violations.
Next: Request the City statement effective through settlement; read every period and invoice.
Official guidance ↗Professional title and water-lien searches
OPA ownership, deed summaries, and a zero tax balance are not clear title. Mortgages, judgments, municipal claims, water liens, easements, heirs, and other encumbrances require separate searches.
Next: Use a Pennsylvania lawyer/title company and obtain owner’s title insurance; order the separate water search/payoff.
Official guidance ↗Separate water-lien guidance ↗Informational only—not a legal opinion, title report, code inspection, tax payoff, or substitute for a Pennsylvania lawyer, title company, inspector, or tax professional.
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: $12,205 appeared in the City's June 2022 delinquency snapshot · a lien number appears in the historical tax ledger through 2016
Limit: A screening signal, not a foreclosure prediction. Tax entries are historical and must be verified with Philadelphia Revenue.
Transparent record rules, not a score or forecast. Each flag is a prompt to verify the cited records, not a prediction or allegation.
Vacant landLand report
An empty lot: no building, just the land and its paper trail. The homeowner tools don't apply; the deed history, owner and zoning are below, and the analyst can trace what the owner holds citywide.
$12K · Jun 2022 delinquency snapshot historical lien entry · through 2016
What it is
Vacant lot
Vacant Land Commer < Acre
Owner
Construction Construction LLC
OPA tax treatment
Assessed $13K
Taxable assessment on the roll
Assessed value
$13,400
2026 OPA · 2027: $18,300
Lot size
1,221 sqft
Zoning
CMX1
Block context
5900 Windsor St sits on the 5900 block of Windsor St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 5902 Windsor St · 5904 Windsor 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 10, 2026, 5:20 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)