2026 taxable assessment $228,700 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $344,700; it is not the 2026 billed-year value.
House report
507 Acorn St
3 bd · 2 stories · 1,216 sqft · RSA2 · built 1950
Owner-occupancy signal · assessed $329K (2026) · 2027 OPA assessment $345K · sold 3×. On the 500 block of Acorn St in ZIP 19128.
BlockReport AI · cited public records
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Property summary
Assessment$328,7002026 OPA assessment · 2027: $344,700
Last sale$211KRecorded 2015 · later nominal deed
Est. tax bill$3,201/year2026 OPA · Homestead-adjusted
Tax delinquencyNo 2022 matchNot proof account is current
Permits2Every fetched City permit
Violations0 open4 historical across 2 cases
“Open” reflects records available then historical records keep their source dates estimates are labeled
Question or correct this record
BlockReport can explain a discrepancy, but it cannot rewrite an official City record. Use the agency that owns the underlying fact:
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 2132997002026 OPA removes $100,000 from the taxable assessment through the owner-occupant exemption.
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.”
What stands out
From the public recordPermit on record
Record summary$228K transfer recorded in 2007. Alteration permit recorded in 2017.
View supporting records →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 1950: 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.
Zoned RSA2: one household by right
Single-family (semi-detached). Converting to a duplex or apartments needs a use variance the zoning board rarely grants — Pennsylvania courts require a physical hardship of the lot itself, and economics alone do not qualify.
The last transfer used nominal consideration
The latest deed records $100 or less and shared-name parties. That is not a usable market-sale price and can reflect a family, estate, gift, correction, or entity transfer. Inspect the deed and order a title search rather than inferring the relationship or chain.
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.
Assessment and tax history
Every fetched annual City assessment for this house, compared with its block and ZIP. The figures show assessment change, the billed-year tax estimate, dated tax records, and recorded transfers. They do not estimate market appreciation or investment return.
Assessed value
$328,700
2026 billed-year assessment · 2027: $344,700 · built 1950
Price / sq ft
$283
block $287 · in line w/ block
Assessment change
+76%
+5%/yr since 2016 · 2027 +5% vs 2026
Est. tax bill / yr
$3,201
0.97% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
3
latest deed has shared-name parties
Assessment vs. the block and ZIP · every dated City record marked on the line
- OPA assessment · 2016$196K 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$196K 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$196K 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$214K 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$222K 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$222K 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$222K 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$269K 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$269K 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$329K 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$329K 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$345K 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 ↗
- Deed / sale · 2007Deed / sale $228KA recorded real-estate document or transfer event. The amount and date can be useful history, but the underlying deed and transfer-tax filing control the parties, consideration, and legal effect.How to read the recorded document ↗
- Deed / sale · 2012Deed / sale $205KA recorded real-estate document or transfer event. The amount and date can be useful history, but the underlying deed and transfer-tax filing control the parties, consideration, and legal effect.How to read the recorded document ↗
- Deed / sale · 2015Deed / sale $211KA recorded real-estate document or transfer event. The amount and date can be useful history, but the underlying deed and transfer-tax filing control the parties, consideration, and legal effect.How to read the recorded document ↗
- Permit · 2017-12-06ZoningThis permit category usually covers the property’s allowed use, dimensions, occupancy, or site configuration. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2017-12-06AlterationThis 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 ↗
- L&I violation · 2016-04-13CLIP VIOLATION NOTICEA dated L&I enforcement row. Read the cited code, required correction, status, and later inspections together; the title alone does not establish the property’s current condition.How L&I violations and orders work ↗
- L&I violation · 2016-04-13RUBBISH/GARBAGE EXTERIOR-OWNERA dated L&I enforcement row. Read the cited code, required correction, status, and later inspections together; the title alone does not establish the property’s current condition.How L&I violations and orders work ↗
- L&I violation · 2017-05-02SWO- CONSTR W/O BLDG PERMIT (Stop-work order for construction without a building permit)Stop-work order for construction without a building permitHow L&I violations and orders work ↗
- L&I violation · 2017-05-02PERMB- OUTDOOR DECKA dated L&I enforcement row. Read the cited code, required correction, status, and later inspections together; the title alone does not establish the property’s current condition.How L&I violations and orders work ↗
- Inspection · 2017-05-02BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- Inspection · 2017-06-09BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- Inspection · 2017-07-14BP_BLDGA dated L&I visit or review. Its type describes the inspection program; the separate result and later rows show whether that visit passed, failed, or led to follow-up.What Philadelphia inspections check ↗
- Inspection · 2017-12-08PRECOURT (likely: pre-court compliance inspection)A follow-up before or during enforcement escalation; confirm the case sequence in the City file.What Philadelphia inspections check ↗
- Appeal · 2017-11-08Zoning 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 assessmentBlock median & rangeZIP 19128 medianAssessmentDeed / saleL&I violationAppealPermitInspection
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 record14 events · exact dates, newest first
- InspectionPRECOURT (likely: pre-court compliance inspection)
- PermitZoning
- PermitAlteration
- AppealZoning board appeal
- InspectionBP_BLDG
- InspectionBP_BLDG
- L&I violationSWO- CONSTR W/O BLDG PERMIT (Stop-work order for construction without a building permit)
- L&I violationPERMB- OUTDOOR DECK
- InspectionBP_BLDG
- L&I violationCLIP VIOLATION NOTICE
- L&I violationRUBBISH/GARBAGE EXTERIOR-OWNER
- Deed / saleDeed / sale $211K
- Deed / saleDeed / sale $205K
- Deed / saleDeed / sale $228K
The short read
Permit on record$228K transfer recorded in 2007. Alteration permit recorded in 2017.
A selected summary of the main sequence. The chart above and source ledger below contain every fetched dated row.
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 14 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 581482 · PASSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. The cited inspection visit was marked passed.
- PermitZoning
Permit 790988 · COMPLETED
APPLICATION IS FOR THE ERECTION OF A SIDE YARD DECK AT FIRST FLOOR LEVEL ACCESSED THROUGH FIRST FLOOR AND FROM GRADE IN AN EXISTING SEMI-DETACHED STRUCTURE AS PART OF AN EXISTING SINGLE-FAMILY HOUSEHOLD LIVING. (SIZE AND LOCATION AS SHOWN ON THE ATTACHED PLAN).
- PermitAlteration
Permit 790989 · COMPLETED
BUILDING OF PRESSURE TREATED DECK WITH RAILINGS.INSTALL SLIDER TO EXISTING OPENING. STAIRS GO TO GRADE AT BACK OF HOUSE. (SEE LOG NOTE)
- AppealZoning board appeal
Appeal 31627 · OPEN · Granted with conditions
Related permit 790988 · PERMIT FOR THE ERECTION OF A SIDE YARD DECK AT FIRST FLOOR LEVEL ACCESSED THROUGH FIRST FLOOR AND FROM GRADE IN AN EXISTING SEMI-DETACHED STRUCTURE FOR A SINGLE-FAMILY HOUSEHOLD LIVING. (SIZE AND LOCATION AS SHOWN ON THE ATTACHED PLAN).
- InvestigationBP_BLDG
Case 581482 · CLOSED
City marked the record closed; open the case for the closing reason.
- InvestigationBP_BLDG
Case 581482 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationSWO- CONSTR W/O BLDG PERMIT (Stop-work order for construction without a building permit)
Case 581482 · Violation 4385170 · Code A-504.1/3 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationPERMB- OUTDOOR DECK
Case 581482 · Violation 4385169 · Code A-301.1/10 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 581482 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationCLIP VIOLATION NOTICE
Case 527727 · Violation 3897361 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationRUBBISH/GARBAGE EXTERIOR-OWNER
Case 527727 · Violation 3897362 · Code CP-305 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- Recorded transfer$211K transfer
2015
- Recorded transfer$205K transfer
2012
- Recorded transfer$228K transfer
2007
What this record suggests
The City file documents 2 permits. 2 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
Flags: 1 zoning/board appeal on record · latest deed has shared-name parties — relationship unverified. 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.
Bedrooms
3
Stories
2
Interior
1,216 sqft
livable area
Lot
2,900 sqft
Basement
Partial, finished
city code E
Heat
Forced hot air
city code A
Central air
Yes
Garage
1 space
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
Average
city code 4
Above averageBelow average
Quality grade
C
assessor's grade
ABCDE
Zoning
RSA2
city zoning code
Zoning appeals
1
OPEN · Granted with conditions · 2017
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
507 Acorn St sits on the 500 block of Acorn St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 505 Acorn St · 509 Acorn 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, 9:26 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)