2026 taxable assessment $443,600 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $581,000; it is not the 2026 billed-year value.
House report
310 Delmar St
4 bd · 2 stories · 2,413 sqft · RSA5 · built 2015
Owner-occupancy signal · assessed $544K (2026) · 2027 OPA assessment $581K · sold 3×. On the 300 block of Delmar St.
BlockReport AI · cited public records
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Property summary
Assessment$543,6002026 OPA assessment · 2027: $581,000
Last sale$580KRecorded 2019
Est. tax bill$6,210/year2026 OPA · Homestead-adjusted
Tax delinquencyNo 2022 matchNot proof account is current
Permits12Every fetched City permit
Violations0 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
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 2123049512026 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 recordNew construction
Record summary$505K transfer recorded in 2015; new construction appears in a 2011 permit, followed by a recorded transfer of $580K in 2019.
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
Zoned RSA5: one household by right
Single-family rowhouse (the classic Philly row). 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.
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
$543,600
2026 billed-year assessment · 2027: $581,000 · built 2015
Price / sq ft
$241
block $259 · below block
Assessment change
+1546%
+29%/yr since 2016 · 2027 +7% vs 2026
Est. tax bill / yr
$6,210
1.14% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
3
Assessment vs. the block and ZIP · every dated City record marked on the line
- OPA assessment · 2016$35K 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$500K 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$500K 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$494K 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$475K 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$475K 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$475K 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$597K 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$597K 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$544K 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$544K 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$581K 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 · 2015Deed / sale $505KA 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 · 2019Deed / sale $580KA 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 · 2011-01-03ZoningThis 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 · 2011-04-29Zoning/useThis 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 · 2011-10-28New constructionThis 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 ↗
- Permit · 2012-06-26PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2012-11-29MechanicalThis 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 ↗
- Permit · 2013-05-16PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2013-11-01ElectricalThis permit category usually covers electrical installation, alteration, replacement, or repair. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2014-01-06SuppressionThis permit category usually covers fire-suppression systems or related life-safety work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2014-06-10PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2024-08-06Addition and/or AlterationsThis 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 ↗
Property assessmentBlock median & rangeZIP 19128 medianAssessmentDeed / salePermit
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 record12 events · exact dates, newest first
- PermitAddition and/or Alterations
- Deed / saleDeed / sale $580K
- Deed / saleDeed / sale $505K
- PermitPlumbing
- PermitSuppression
- PermitElectrical
- PermitPlumbing
- PermitMechanical
- PermitPlumbing
- PermitNew construction
- PermitZoning/use
- PermitZoning
The paper trail
New construction$505K transfer recorded in 2015; new construction appears in a 2011 permit, followed by a recorded transfer of $580K in 2019.
- 2011 New constructionPermitNew constructionPermitNew constructionPermit
- 2012 PlumbingPermitMechanicalPermit
- 2013 PlumbingPermitElectricalPermit
- 2014 SuppressionPermitPlumbingPermit
- 2015 $505KTransfer
- 2019 $580KTransfer
- 2024 Addition and/or AlterationsPermit
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
- PermitAddition and/or Alterations
Permit MP-2024-003525 · Expired
EZ PERMIT DUCTWORK & WARM-AIR APPLIANCES- For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from these standards require submission of construction and site plans. replacement of existing furnace, coil, condenser. Exact swap
- Recorded transfer$580K transfer
2019
- Recorded transfer$505K transfer
2015
- PermitPlumbing
Permit 542171 · COMPLETED
STACK WASTE & WATER LNE & SET FIXTURES 5 WC,5 LAV SINK,4 BATH TUB,1 KITCHEN SINK & LAV BOX (SFD) "SELF-CERTIFICATION'S ARE NO LONGER PERMITTED" - "ALL EXCAVATIONS AND PLUMBING TRENCHES IN EXCESS OF 5 FT IN DEPTH MUST HAVE APPROVED SHORING IN PLACE AT THE TIME OF INSPECTION"PA20141610986
- PermitSuppression
Permit 508881 · COMPLETED
INSTALLATION OF A FIRE SUPPRESSION SYSTEM. 13D, 1" FEED MAIN.
- PermitElectrical
Permit 503916 · COMPLETED
INSTALL 200AMP SERVICE WITH 40 CIRCUIT PANEL,FINISH ROUGH IN,INSTALL ALL DEVICES AND 12 ARC FAULT BREAKERS PER 2008 NEC (SFD)
- PermitPlumbing
Permit 471807 · EXPIRED
REPLACE LATERAL CURB TRAP & WATER SERVICE 1" (SFD) PA20131353278
- PermitMechanical
Permit 440348 · COMPLETED
INSTALL 2 PAYNE HVAC UNITS (SFD)
- PermitPlumbing
Permit 413202 · EXPIRED
DRAIN AND WATER FROM FRONT WALL TO FIXTURES AND ROOF, 5 TOILETS, 5 LAVS, 4 TUBS, 1 WASHER BOX, 1 KS(SFD)
- PermitNew construction
Permit 362987 · COMPLETED
CONSTRUCTION ON (1) 3 STORY TOWNHOME PLUS GARAGE AND BASEMENT
- PermitNew construction
Permit 362992 · COMPLETED
CONSTRUCTION ON (1) 3 STORY TOWNHOME PLUS GARAGE AND BASEMENT
- PermitNew construction
Permit 362993 · COMPLETED
CONSTRUCTION ON (1) 3 STORY TOWNHOME PLUS GARAGE AND BASEMENT
- PermitZoning/use
Permit 338428 · COMPLETED
FOR THE ERECTION OF A THREE STORY ATTACHED STRUCTURE9MAXIMUM HEIGHT NTE 35 FEET) WITH A ROOF DECK ON THIRD FLOOR FRONT, WITH A ROOF DECK ACCESSED BY A PILOT HOUSE, WITH INTERIOR PARKING FOR ONE AUTOMOBILE(SIZE AND LOCATION AS SHOWN ON THE APPLICATION). FOR USE AS A SINGLE FAMILY DWELLING.
- PermitZoning
Permit 310677 · COMPLETED
RELOCATION OF LOT LINES TO CREATE THREE(3) LOTS FROM ONE LOT(SIZE AND LOCATION AS SHOWN ON THE APPLICATION).
What this record suggests
The City file documents 12 permits touching kitchen work, bathroom work, electrical work, plumbing. 9 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
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
4
Stories
2
Interior
2,413 sqft
livable area
Lot
1,861 sqft
Basement
Partial, finished
city code E
Heat
Forced hot air
city code A
Central air
Yes
Garage
1 space
Exterior condition
Above average
city code 3
Above averageBelow average
Interior condition
Above average
city code 3
Above averageBelow average
Quality grade
B
assessor's grade
ABCDE
Zoning
RSA5
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
310 Delmar St sits on the 300 block of Delmar St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 308 Delmar St · 312 Delmar 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 11, 2026, 4:22 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)