2026 taxable assessment $521,300 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $520,300; it is not the 2026 billed-year value.
Mixed-use report
901 S 12th St
2,376 sqft · RM1 · built 1920
Owner-occupied · assessed $521K (2026) · 2027 OPA assessment $520K. On the 900 block of S 12th St.
Property summary
Assessment$521,3002026 OPA assessment · 2027: $520,300
Last sale—No sale value available
Est. tax bill$7,297/year2026 taxable assessment × 1.3998%
Tax delinquencyNo 2022 matchNot proof account is current
Permits2Every fetched City permit
Violations0 open9 historical across 3 cases
“Open” reflects records available then historical records keep their source dates estimates are labeled
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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 8715039802026 taxable assessment equals the full assessed value.
Historical delinquency sources Record found
This parcel did not match the June 2022 delinquency snapshot. That absence does not confirm the account is current today.
A separate historical parcel ledger ending in 2016 records $2,063.25 and a lien entry. It is shown as historical context only.
2015$1,180.65 total · $0.00 principal · $482.24 interest · $375.07 penalty2016$882.60 total · $727.74 principal · $10.92 interest · $7.28 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 recordImproved
Why it mattersOwner pulled a addition and/or alteration permit in 2025.
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
- Daniel Delcollo Jr & Loretta
- Tax mailing address
- 901 S 12TH ST, PHILADELPHIA PA, 19147
- L&I district
- CENTRAL EAST
- Building ID (BIN)
- —
- OPA account
- 871503980
Permits2Every dated permit
Violation cases39 violation records · 0 open
Investigations107 failed · 3 passed · 0 closed
Building certifications0No match
Business licenses0No match
Appeals0No match
PermitsPermit number, issued date, work and City status2
Commercial Make Safe PermitPermit CP-2024-006498
Dec 19, 2024 Completed Completed Jan 29, 2025
MAKE SAFE PERMIT TO COMPLY WITH UNSAFE VIOLATION# CF-2024-023250 TO INCLUDE STRUCTURAL REPAIRS TO FLOOR JOISTS PER APPROVED PLANS, ENGINEERS REPORT AND IN ACCORDANCE WITH CODE BULLETIN PM-1801. LICENSED PA PROFESSIONAL ENGINEER IS REQUIRED TO MONITOR REPAIRS MADE UNDER THIS PERMIT. THE ENGINEER MUST SUBMIT A SEALED STATEMENT TO THE DEPARTMENT CONFIRMING THAT THE STRUCTURE IS IN SOUND CONDITION AT COMPLETION.
Addition and/or AlterationPermit EP-2025-001948
Mar 11, 2025 Issued
Repair fire damaged wiring in basement rear and 1st floor rear. Install junction boxes and new wiring in already opened walls. No demo or drywall removal required. Work are shall not exceed 2000 sqft with in individual tenant space.
Violation cases9 individual violation records; resolved history remains visible3
Case CF-2024-023250CLOSED
NOTICE OF VIOLATION · Opened Mar 22, 2024 · completed Jan 28, 2025
- UNSAFE STRUCTUREViolation VI-2024-018972Mar 22, 2024 COMPLIED
- INTERIOR UNSAFE GENERALViolation VI-2024-018973Mar 22, 2024 COMPLIED
- ARCHITECT/ENGINEER SERVICESViolation VI-2024-018974Mar 22, 2024 COMPLIED
- STRUCTURAL REPAIRViolation VI-2024-018975Mar 22, 2024 COMPLIED
Case CF-2024-116498CLOSED
NOTICE OF VIOLATION · Opened Oct 31, 2024 · completed Nov 18, 2024
- UNSAFE STRUCTUREViolation VI-2024-089323Oct 31, 2024 CLOSED
- EXTERIOR WALLSViolation VI-2024-089324Oct 31, 2024 CLOSED
- ARCHITECT/ENGINEER SERVICESViolation VI-2024-089325Oct 31, 2024 CLOSED
- STRUCTURAL REPAIRViolation VI-2024-089326Oct 31, 2024 CLOSED
Case CF-2025-129574CLOSED
NOTICE OF VIOLATION · Opened Dec 2, 2025 · completed Feb 26, 2026
- VACANT STRUCTURE LICENSEViolation VI-2025-093643Dec 2, 2025 COMPLIED
InvestigationsEvery inspector visit, including CLOSED outcomes10
L&I investigationCase CF-2024-023250
Mar 22, 2024 FAILED
L&I investigationCase CF-2024-023250
Jul 23, 2024 FAILED
L&I investigationCase CF-2024-023250
Sep 26, 2024 FAILED
L&I investigationCase CF-2024-116498
Oct 31, 2024 FAILED
L&I investigationCase CF-2024-023250
Oct 31, 2024 FAILED
L&I investigationCase CF-2024-116498
Nov 18, 2024 PASSED
L&I investigationCase CF-2024-023250
Dec 11, 2024 FAILED
L&I investigationCase CF-2024-023250
Jan 28, 2025 PASSED
L&I investigationCase CF-2025-129574
Dec 2, 2025 FAILED
L&I investigationCase CF-2025-129574
Feb 26, 2026 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.
3 resolve before relying
5 verify
Resolve before relyingZoning approval is not the occupancy fileThe record identifies more than one dwelling/use.
Why it mattersPhiladelphia says a zoning approval or Property Sales Certification can identify a use without proving that it was established under the Building Code. A change of use, unit count, exits, or fire rating can require a Building Permit and Certificate of Occupancy.
Verify nextVerify the lawful use, unit count, associated construction permits, and Certificate of Occupancy with L&I.
Open the controlling City guidance ↗Resolve before relyingA permit row needs file-level verification1 permit not marked completed: EP-2025-001948 (Issued).
Why it mattersIssued work is not the same as approved final work. L&I uses final inspections and required certifications to close construction permits; expired, withdrawn, and completed are different City statuses.
Verify nextOpen the permit file and confirm final inspections, holds, and any resulting occupancy certificate.
Open the controlling City guidance ↗Resolve before relyingAn unsafe-building history still deserves the repair fileThe fetched record shows 0 open and 9 historical violations across 3 cases.
Why it mattersThe aggregate currently shows zero open violations, so a historical unsafe/imminently-dangerous row is not a current hazard finding. The repair or demolition permit, final inspection, and case closure are the evidence that resolves the former designation.
Verify nextReview the Make Safe/repair permit, final inspection, and case closure.
Open the controlling City guidance ↗VerifyResidential and business space run on separate compliance tracksOPA classifies this parcel as mixed-use.
Why it mattersThe zoning/use and occupancy file must cover the actual residential and commercial spaces. Dwelling units can require Rental Licenses and lead compliance; the operator can separately need an Activity License and sector license; installed fire systems can require annual certification.
Verify nextMatch every dwelling and business use to the zoning permit, CO, current operator licenses, and life-safety filings.
Open the controlling City guidance ↗VerifyResidential form does not establish rental useOPA classifies the parcel as mixed-use; no active Rental License row matched.
Why it mattersA multi-unit or mixed-use classification does not prove that space is currently rented. If dwelling space is rented, Philadelphia generally requires a current Rental License and related occupancy, tax, violation, and lead compliance.
Verify nextConfirm actual occupancy first; if any unit is rented, verify the license and legal unit count with L&I.
Open the controlling City guidance ↗VerifyFailed inspections are dated events—not the current condition7 failed, 3 passed, and 0 CLOSED investigation outcomes are in the fetched history; the latest dated visit was PASSED on Feb 26, 2026.
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 ↗VerifyA fire-system permit exists, but no annual certification matched1 fire/suppression-related permit matched; the fetched BIN certification feed returned no row.
Why it mattersInstalled systems in mixed-use and larger buildings generally require periodic certification, but applicability and limited-area exceptions vary. A missing BIN/address join is not proof of a compliance failure.
Verify nextConfirm what system was installed and whether a current annual certificate is required and filed.
Open the controlling City guidance ↗VerifyA separate Commercial Trash account may applyOPA classifies the parcel as mixed-use. BlockReport does not receive a current Commercial Trash account balance.
Why it mattersPhiladelphia charges qualifying small commercial, mixed-use, and multi-unit properties that use City collection; exemptions and private collection can change applicability. A use category alone does not prove a fee is due.
Verify nextCheck the Commercial Trash account inside the date-effective Property Payoff.
Open the controlling City guidance ↗Closing file: checks no public-record summary can replace5 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 ↗Seller-specific tax relief is not the buyer’s bill
LOOP and low-income or senior Real Estate Tax freezes depend on the qualifying owner and continued program eligibility; a buyer cannot assume the seller’s capped or frozen bill continues. A separately verified property abatement often remains with the property for its remaining term, but program-specific new-owner filing, use, and tax-compliance conditions still must be confirmed—not inferred from the reduced assessment alone.
Next: Have Revenue or OPA identify every current benefit, model the buyer’s bill without seller-specific relief, and confirm any verified abatement in writing.
Official guidance ↗Separate water-lien guidance ↗Seller disclosure and independent inspections
For a covered Pennsylvania residential transfer, obtain the statutory seller disclosure. It reports the seller’s knowledge; it is not a warranty, title search, code review, or substitute for inspections. Because OPA dates this building before 1978, separately obtain the required federal/City lead disclosures and any test results.
Next: Have the agreement and disclosure reviewed for this transaction’s coverage and exceptions.
Official 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: a lien number appears in the historical tax ledger through 2016 · failed L&I inspection activity in 2024
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.
What to do with this
The record, translated into moves — what a buyer, the owner, and a landlord would each want to check next under Philadelphia's actual rules.
If you’re buying
Built 1920: lead rules apply
Federal law requires a lead-paint disclosure at sale for any pre-1978 home. If it will be rented, Philadelphia also requires a lead-safe or lead-free certificate before a rental license can issue.
If you own it
$1,399/yr may be unclaimed
This home reads owner-occupied but shows no Homestead Exemption, which removes $100,000 from the taxable assessment (worth up to $1,399/yr). Applying through the City is free and takes minutes.
$2,063 in the historical tax ledger through 2016
Historical context only, not a current payoff figure; that ledger also contains a lien entry. Verify today's balance and lien status directly with Philadelphia Revenue before relying on it.
Derived from the fetched property records and linked City guidance as of 2026. Assessment treatment is not a substitute for an exemption approval, live balance, title report, license, occupancy certificate, or inspection. Informational only — not legal, tax, or investment advice.
The investment read
How this building has moved and where it's pointed: the city's assessed value (not a listing price) over 12 years, charted against its block; appreciation is that history's pace, and the 5-year figure simply extends it. Yield estimates rent-vs-price from area rents. Ask the record to dig into any number.
Assessed value
$521,300
2026 billed-year assessment · 2027: $520,300 · built 1920
Price / sq ft
$219
block $256 · below block
Appreciation
+35%
+3%/yr, city 6.5%
In 5 years (~2031)
~$521K
+3%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax bill / yr
$7,297
1.4% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Gross yield
4%
≈$2K/mo rent
Times sold
0
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeL&I violationInspection
The paper trail
ImprovedOwner pulled a addition and/or alteration permit in 2025.
- 2024 8 L&I violations incl UNSAFE STRUCTUREL&IL&I: 6 failed, 1 passedL&I visitCommercial Make Safe PermitPermit
- 2025 Addition and/or AlterationPermitL&I violationL&IL&I: 1 failed, 1 passedL&I visit
- 2026 Inspection passedL&I visit
Flags: historical tax ledger through 2016 recorded $2K with a lien entry. Informational only — not investment advice or a consumer report (FCRA).
The property, on paper
The city assessor's field record — the physical spec sheet behind the assessed number.
Interior
2,376 sqft
livable area
Lot
475 sqft
Exterior condition
Above average
city code 3
Above averageBelow average
Interior condition
Above average
city code 3
Above averageBelow average
Quality grade
C
assessor's grade
ABCDE
Zoning
RM1
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Run the numbers
What owning 901 S 12th St takes, at your price and your rate. Taxes start with an annual estimate from the City’s taxable assessment, not a current bill or balance; rent starts at the area median. Assessed value is not an asking price — set the price slider to the real one.
Mortgage
—
P&I · 30-yr fixed
All-in monthly
—
+ taxes & insurance
Cash to close
—
down + ~4% costs
Cash flow
—
rent − all costs · /mo
Cap rate
—
NOI ÷ price
Cash-on-cash
—
year-1 return on cash in
Estimates for orientation, not advice. Assumes a 30-year fixed loan, $1,400/yr insurance, 1% of price/yr maintenance; taxes use this parcel's taxable assessment, not a live Tax Center balance.
Block context
901 S 12th St sits on the 900 block of S 12th St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 903 S 12th St · 905 S 12th 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, 1:12 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)