2026 assessment
$375K
OPA value, not a listing price
Multi-family report
20 S 51st St
3 stories1,935 sqftRM1built 1925
Property at a glanceApartment building
Individual, other or unknown mailing address
ZIP 19139 area
Walnut Hill · Haddington
0 block of S 51st St
Assessment and City record timeline
Published City assessments for this building against its block and ZIP. Dated City filings are marked on the same line. Select one to read it. Assessments are tax-roll values, not sale prices or appraisals.
- OPA assessment · 2016$227K 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$227K 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$227K 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$294K 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$306K 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$306K 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$306K 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$357K 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$357K 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$375K 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$375K 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$408K 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 · 2010Deed / sale $60KA 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 · 2010-12-09DemolitionThis permit category usually covers partial or complete removal 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 · 2011-02-11UseThis 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 · 2011-02-11Major alterationA broad legacy permit work category for a substantial building alteration. It can include changed layouts, partitions, fixtures, finishes, structural work, or occupancy-related work, but only the approved scope and plans say what this permit actually authorized; separate trade permits may be required.What Philadelphia building permits can cover ↗
- Permit · 2011-03-29PlumbingThis 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 · 2011-03-30AlterationThis 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 · 2011-04-29MechanicalThis 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 · 2011-06-09ElectricalThis 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 · 2023-08-09AlterationsThis 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 ↗
- License · 2011-01-25JERRY J MARTIN: Rental landlord or residential registration initially issuedA City license record tied to an activity or property use. Its issue, expiration, inactive, and status fields—not the category alone—show what was recorded for this date.Philadelphia L&I licenses and property records ↗
Property assessmentBlock median & rangeZIP 19139 (Walnut Hill · Haddington) medianAssessmentDeed / salePermitLicense
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 record10 events · exact dates, newest first
- PermitAlterations
- PermitElectrical
- PermitMechanical
- PermitAlteration
- PermitPlumbing
- PermitUse
- PermitMajor alteration
- LicenseJERRY J MARTIN: Rental landlord or residential registration initially issued
- PermitDemolition
- Deed / saleDeed / sale $60K
Flags: active rental license · latest deed has shared-name parties; relationship unverified. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$5,245/year estimated property tax
2026 taxable assessment $374,700 × 1.3998%. This is an estimate, not a bill or account balance. The City maintains payments, credits, interest, and the current amount due.
OPA has published a 2027 assessment of $407,900. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 6021667002026 taxable assessment equals the full assessed value.
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.”
The property, on paper
OPA physical field record.
Stories
3
Interior
1,935 sqft
livable area
Lot
2,010 sqft
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
RM1
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
0 block of S 51st St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 18 S 51st St · 22 S 51st St
L&I license dates · data through Jul 23, 2026
Business licenses at this address Latest pull
What L&I has registered at this OPA parcel, newest initial license date first.
No L&I business license is on record at this address in data through Jul 23, 2026.
Landlord and residential filings
These are property registrations or landlord filings, not businesses operating at this address.
JERRY J MARTINActive
Rental · Initial issue date Jan 25, 2011 · Filed expiration Feb 28, 2027
A license is an L&I registration, not proof that a business is open, operating today, or located at this storefront. Dates are license dates. Events are deduped by parcel, business identity, and license type, so a renewal is not shown as another opening. Other permit and filing types remain in the full source ledger.
Open every source row 10 dated rows
- PermitAlterations
Permit PP-2023-011068 · Completed
Supply and install new curb trap and Philadelphia regulation vent box and cover
- PermitElectrical
Permit 334317 · COMPLETED
INSTALL 350AMP SERVICE,26 DUPLEX,RECEPTACLES,57 LIGHTS FIXTURES,3 FANS,10GFCI,12 SINGLE STATION SMOKE DETECTORS,24 SWITCHES,3 125AMP SUB PANELS AND 1 FIRE ALARM SYSTEM AS PER 2008 NEC,NFPA-72
- PermitMechanical
Permit 338353 · COMPLETED
TO INSTALL (3)HEAT & A/C SYSTEMS.1ST FLT.(1)WELL MCLANE HEATER MODLE/WMVSAO90NH3R/RATED 90,000 BTU'S W/3 TON COOLING.2ND FLR.UNIT SAME AS ABOVE THE 1ST FLR.3RD FLR.UNITR TO BE (1) WELL MCLANE HEATER MODEL#WAVSA072NH3R RATED 72,000 BTU'S W/2 TON COOLING.ALL NEW DUCTWORK FOR (3)UNITED.MUST BE SELF CONTAINED.
- PermitAlteration
Permit 332187 · COMPLETED
<<<PORCH FLOOR>>> REPLACEMENT OF PORCH FLOOR WITH 4" CONCRETE REINFORCED WITH #6 REBAR INSTALLED ON A 12" GRID
- PermitPlumbing
Permit 332377 · COMPLETED
INSTALL NEW (3) KITCHEN SINKS, (3) 3-PIECE BATHROOMS, (2) WASHER BOXES, WATER LINE, DRAIN LINES
- PermitUse
Permit 322162 · COMPLETED
USE TO 3FD
- PermitMajor alteration
Permit 322711 · COMPLETED
FOR A COMPLETE RENOVATION OF AN EXISTING THREE (3) FAMILY DWELLING. THIS WORK ACTIVITY SHALL INCLUDE THE REPLACEMENT OF SELECTED FLOOR JOIST THAT ARE BEYOND SERVICE. ALL WORK ACTIVITY SHALL COMPLY WITH THE APPROVED PLANS. THIS WORK ACTIVITY SHALL BE PERFORMED BY CONTRACTOR LICENSED BY THE CITY OF PHILADELPHIA. DISTRICT INSPECTOR SHALL LIST THE CONRTACTOR OF RECORD.
- License issue eventJERRY J MARTIN: Rental landlord or residential registration initially issued
License 523989 · Active
License event. Registration does not prove present operation or storefront occupancy.
- PermitDemolition
Permit 315673 · COMPLETED
<<<INTERIOR DEMOLITION>>> INTERIOR DEMOLITION OF NON-LOADBEARING ELEMENTS IN SINGLE FAMILY DWELLING. DEVIATIONS WILL RESULT IN THE REVOCATION OF THIS PERMIT AND IMPOSITION OF FURTHER PENALTIES.
- Recorded transfer$60K transfer
2010
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 23, 2026, 12:03 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)