2026 assessment
$1.3M
OPA value, not a listing price
House report
525 W Mermaid Ln
Research this property with Analyst →4 bd2 ba3,257 sqftRSD1built 1925
Property at a glanceHouse
Owner-occupancy signal
ZIP 19118 area
Chestnut Hill
500 block of W Mermaid Ln
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$569K 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$569K 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$569K 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$727K 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$696K 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$696K 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$696K 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$980K 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$980K 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$1.3M 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$1.3M 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$1.2M 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 ↗
- Permit · 2013-10-17AlterationThis 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 · 2013-11-25ZoningThis 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 · 2013-11-25Major 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 · 2013-12-06ElectricalThis 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 · 2013-12-31PlumbingThis 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 · 2014-02-19MechanicalThis 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 · 2017-04-20ZoningThis 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 · 2017-04-20AdditionThis 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 · 2017-08-30ElectricalThis 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 · 2020-10-07Addition 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 ↗
- L&I violation · 2014-01-14PERMB- INSTALL HVAC SYSA 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 · 2014-01-14BP_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 · 2014-02-24BP_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 ↗
Property assessmentBlock median & rangeZIP 19118 (Chestnut Hill) medianAssessmentL&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 record13 events · exact dates, newest first
- PermitAddition and/or Alteration
- PermitElectrical
- PermitZoning
- PermitAddition
- InspectionBP_BLDG
- PermitMechanical
- L&I violationPERMB- INSTALL HVAC SYS
- InspectionBP_BLDG
- PermitPlumbing
- PermitElectrical
- PermitZoning
- PermitMajor alteration
- PermitAlteration
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$17,770/year estimated property tax
2026 taxable assessment $1,269,500 × 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 $1,174,200. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 0921438002026 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
4
Bathrooms
2
Interior
3,257 sqft
livable area
Lot
19,649 sqft
Basement
Partial
city code H
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
Average
city code 4
Above averageBelow average
Quality grade
B+
assessor's grade
ABCDE
Zoning
RSD1
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
500 block of W Mermaid Ln. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 521 W Mermaid Ln · 531 W Mermaid Ln
L&I licenses checked through Jul 28, 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 13 dated rows
- PermitAddition and/or Alteration
Permit RP-2020-008086 · Expired
Installation on an in-ground pool (36'0" in length x 20'0" wide in shallow end & 16'0" wide in deep end). Maximum depth 7'0". Proposed 4'0" fence with self-closing / self latching gate.
- PermitElectrical
Permit 812476 · COMPLETED
WIRE AND INTALL INTERIOR & EXTERIOR LIGHTS, OUTLETS & SWITCHES TO ATTACHED GARAGE USING EXISTING 200 AMP SERVICE (SFD) AS PER NEC 2008
- PermitZoning
Permit 769866 · COMPLETED
ADDITION OF A SINGLE STORY ATTACHED (2) CAR GARAGE WITH VESTIBULE TO AN EXSITING HOME
- PermitAddition
Permit 769880 · COMPLETED
ADDITION OF A SINGLE STORY ATTACHED (2) CAR GARAGE WITH VESTIBULE TO AN EXSITING HOME
- InvestigationBP_BLDG
Case 416399 · PASSED
The cited inspection visit was marked passed.
- PermitMechanical
Permit 520291 · COMPLETED
INSTALL NEW WARM AIR LENNOX FURNACE AND AIR CONDITIONER
- ViolationPERMB- INSTALL HVAC SYS
Case 416399 · Violation 3060899 · Code A-301.1/46 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationBP_BLDG
Case 416399 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitPlumbing
Permit 513708 · COMPLETED
RENOVATION OF ALL BATHROOMS AND KITCHEN IN PROPERTY
- PermitElectrical
Permit 509824 · COMPLETED
INSTALL NEW 200AMP SERV, 45-OUTLETS, 50-SW, 68-LGTS, 5-SMOKE DETECTORS, WIRE 1/C UNIT, DISHWASHER, GARBAGE DISPOSAL, MICRO, REFRIGERATOR, GAS RANGE OUTLET & HEATERAS PER NEC 2008 (SFD)
- PermitZoning
Permit 507911 · COMPLETED
DEMOLITION OF PARTIAL SECOND FLOOR CEILING AND REPLACE WITH CATHEDRAL CEILING (SEE AP #505901 FOR PLANS)
- PermitMajor alteration
Permit 505901 · COMPLETED
REMOVE PARTIAL SECOND FLOOR FOR CEILING AND INTERIOR ALTERATIONS. THIS IS IN CONJUNCTION WITH EXISTING PERMITS FOR EXTERIOR SIDING, WINDOW AND REPLACEMENT AND NEW ROOF. (OWNERS ARE DOING ALL WORK.)
- PermitAlteration
Permit 500635 · COMPLETED
REPLACE ROOFING, REPLACE VIVYL SIDING AND REPLACE EXISTING WINDOWS.
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 28, 2026, 10:14 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)