2026 assessment
$516K
OPA value, not a listing price
House report
510 Mountain St
3 bd2 ba3 stories1,683 sqftRSA5built 1920
Property at a glanceHouse
Individual, other or unknown mailing address
ZIP 19148 area
Pennsport · Lower Moyamensing
500 block of Mountain St
Assessment and City record timeline
Published City assessments for this house 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$164K 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$164K 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$164K 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$221K 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$240K 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$240K 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$240K 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$288K 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$288K 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$516K 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$516K 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$501K 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 · 2017Deed / sale $150KA 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 $240KA 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 · 2021Deed / sale $450KA 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 · 2017-06-01DemolitionThis 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 · 2019-04-09Interior Non-Load-Bearing Wall Demo.This 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 · 2019-07-22Addition and/or AlterationThis 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 · 2019-08-23AlterationsThis 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 · 2019-09-26New 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 · 2019-10-18New 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 ↗
- L&I violation · 2016-06-29EXTERIOR AREA SANITATIONA 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 · 2016-07-15RUBBISHA 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 · 2016-07-15HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- L&I violation · 2016-08-24PORTABLE HEATING/COOKING EQUIPA 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 · 2016-08-24MECH - MECHANICAL EQUIPMENTA 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 · 2016-08-24HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2016-08-24HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- L&I violation · 2017-11-30RUBBISHA 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 · 2017-11-30EXTERIOR AREA SANITATIONA 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 · 2017-11-30HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2016-10-06HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2016-10-13HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2016-11-28HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
- Inspection · 2017-01-05PRECOURT (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 ↗
- Inspection · 2018-01-29HCEU INSP (Housing Code Enforcement Unit inspection)A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended.What Philadelphia inspections check ↗
Property assessmentBlock median & rangeZIP 19148 (Pennsport · Lower Moyamensing) medianAssessmentDeed / saleL&I violationPermitInspection
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 record24 events · exact dates, newest first
- Deed / saleDeed / sale $450K
- PermitNew Construction
- PermitNew Construction
- PermitAlterations
- PermitAddition and/or Alteration
- PermitInterior Non-Load-Bearing Wall Demo.
- Deed / saleDeed / sale $240K
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationRUBBISH
- L&I violationEXTERIOR AREA SANITATION
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- PermitDemolition
- InspectionPRECOURT (likely: pre-court compliance inspection)
- Deed / saleDeed / sale $150K
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationPORTABLE HEATING/COOKING EQUIP
- L&I violationMECH - MECHANICAL EQUIPMENT
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationRUBBISH
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- L&I violationEXTERIOR AREA SANITATION
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$7,217/year estimated property tax
2026 taxable assessment $515,600 × 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 $501,300. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 0113616002026 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.
Bedrooms
3
Bathrooms
2
Stories
3
Interior
1,683 sqft
livable area
Lot
750 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
New / rehabbed
city code 2
New / rehabbed
Interior condition
New / rehabbed
city code 2
New / rehabbed
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
500 block of Mountain St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 508 Mountain St · 512 Mountain St
L&I licenses checked through Jul 24, 2026
No business or residential license records
No business license or residential registration matched this OPA parcel in the latest City data.
Open every source row 24 dated rows
- Recorded transfer$450K transfer
2021
- PermitNew Construction
Permit 1020110 · Completed
AHVAC - INSTALL 90% 72,000 BTU GAS FURNACE HEAT & 3-TON A/C UNIT AND ALL RELATED DUCTWORK WITH 12 DIFFUSERS AND THE CONDENSER MOUNTED ON A PAD IN THE REAR YARD. (SEE BLDG PERMIT #965398)
- PermitNew Construction
Permit 1014062 · Completed
NEW 200AMP SERVICE ELECTRICAL REWIRE/DEVICES AS PER 2014 NEC
- PermitAlterations
Permit 1004965 · Completed
INSTALL STACK,WASTE AND WATER LINES FOR 4-LAV SINKS,1-KITCHEN SINK,2-WATER CLOSETS,1-TUB,1-SHOWER,1-BAR SINK,1-WASHER STANDPIPE AND 1-WATER HEATER.THE INSTALLATION WILL COMPLY WITH THE PHILADELPHIA PLUMBING CODE 2004 - THE INSTALLATION DOES NOT INCLUDE GARBAGE DISPOSAL OR DISHWASHER
- PermitAddition and/or Alteration
Permit 965417 · Completed
STRUCTURAL WORK RELATED TO STAIR OPENING DETAILS AS SHOWN ON THE PLAN ( NO OTHER WORK INCLUDED ON THIS APPLICATION.
- PermitInterior Non-Load-Bearing Wall Demo.
Permit 965398 · Completed
IEBC LEVEL 2 ALTERATION LAMINATE DRYWALL/ INSULATE NEW WINDOWS/ DOORS/ TRIM/ FINISHES NEW KITCHEN/ BATH AS PER EZ PERMIT STANDARDS ALTERATIONS- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction plans. STRUCTURAL ALTERATION OR REPAIR IS EXPRESSLY PROHIBITED UNDER THIS PERMIT. PROHIBITED STRUCTURAL WORK INCLUDES ANY MODIFICATION TO EXTERIOR WALLS, PARTY WALLS, FLOOR/ROOF FRAMING OR FOUNDATIONS; UNDERPINNING AND EXCAVATIONS (I.E. DIGGING IN BASEMENT).
- Recorded transfer$240K transfer
2019
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 568737 · PASSED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked passed.
- ViolationRUBBISH
Case 568737 · Violation 4522250 · Code PM15-308.2 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationEXTERIOR AREA SANITATION
Case 568737 · Violation 4522249 · Code PM15-302.1 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 568737 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitDemolition
Permit 781432 · EXPIRED
EZ INTERIOR DEMOLITION- FOR THE INTERIOR DEMOLITION OF NON LOAD-BEARING PARTITION WALLS AND CEILINGS AS PER ATTACHED STANDARD. DEVIATIONS FROM THIS STANDARD WILL RESULT IN PERMIT REVOCATION AND REQUIRE SUBMISSION OF CONSTRUCTION PLANS.
- InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 544633 · CLOSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. City marked the record closed; open the case for the closing reason.
- Recorded transfer$150K transfer
2017
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 552036 · CLOSED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. City marked the record closed; open the case for the closing reason.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 552036 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 544633 · CLOSED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. City marked the record closed; open the case for the closing reason.
- ViolationPORTABLE HEATING/COOKING EQUIP
Case 552036 · Violation 4155405 · Code FC-13-308.19 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- ViolationMECH - MECHANICAL EQUIPMENT
Case 552036 · Violation 4155406 · Code PM15-603.1 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 544633 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 552036 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationRUBBISH
Case 544633 · Violation 4106831 · Code PM15-308.2 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 544633 · FAILED
A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- ViolationEXTERIOR AREA SANITATION
Case 544633 · Violation 4106830 · Code PM15-302.1 · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
Unavailable when this report assembled: certifications. Unavailable does not mean no record.
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 24, 2026, 10:16 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: unavailable. “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)