2026 assessment
$2.0M
OPA value, not a listing price
House report
517 W Mermaid Ln
Research this property with Analyst →5 bd4 ba2 stories5,728 sqftRSD1built 2010
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$807K 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$807K 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$807K 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$1.1M 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$1.4M 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$1.4M 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$1.4M 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$1.7M 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$1.7M 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$2.0M 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$2.0M 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$2.0M 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 ↗
- Land buy · 2008Land record $425KA land-record event associated with this parcel. Review the recorded instrument to determine whether it reflects a conveyance, parcel change, or another filing.How to read the recorded document ↗
- Teardown · 2008DemolishedThis 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 ↗
- Deed / sale · 2011Deed / sale $1.4MA 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 · 2008-02-04Zoning/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 · 2008-02-05DemolitionThis 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 · 2008-03-18Zoning/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 · 2008-03-18ElectricalThis 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 · 2008-05-02New 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 · 2008-05-21MechanicalThis 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 · 2008-07-10PlumbingThis 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 · 2008-09-11PlumbingThis 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 ↗
Property assessmentBlock median & rangeZIP 19118 (Chestnut Hill) medianAssessmentDeed / saleLand buyTeardownPermit
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 record11 events · exact dates, newest first
- Deed / saleDeed / sale $1.4M
- PermitPlumbing
- PermitPlumbing
- PermitMechanical
- PermitNew construction
- PermitZoning/use
- PermitElectrical
- PermitDemolition
- PermitZoning/use
- Land buyLand record $425K
- TeardownDemolished
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$26,767/year estimated property tax
2026 taxable assessment $1,912,200 × 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 $1,983,600. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 0921436002026 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.”
The property, on paper
OPA physical field record.
Bedrooms
5
Bathrooms
4
Stories
2
Interior
5,728 sqft
livable area
Lot
17,384 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Garage
2 spaces
Exterior condition
Above average
city code 3
Above averageBelow average
Interior condition
Above average
city code 3
Above averageBelow average
Quality grade
A+
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 · 511 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 10 dated rows
- Recorded transfer$1.4M transfer
2011
- PermitPlumbing
Permit 176764 · COMPLETED
INSTALL 5" LAT, 5" CT, 3/4" WS
- PermitPlumbing
Permit 163591 · COMPLETED
REPLACE PLUMBING SYSTEM
- PermitMechanical
Permit 153384 · COMPLETED
INSTALL 2 HVAC UNITS, 90% (SFD)
- PermitNew construction
Permit 136553 · COMPLETED
CONSTRUCT NEW SFD PER SUBMITTED SEALED PLANS. C.O.
- PermitZoning/use
Permit 134284 · COMPLETED
CONSTRUCTION OF A SINGLE FAMILY DWELLING ON AN EMPTY LOT
- PermitElectrical
Permit 139334 · COMPLETED
WIRE SINGLE FAMILY DWELLING, INSTALL 400AMP SERVICE, 95 OUTLETS, 70 SWITCHES, 35 LIGHT FIXTURES, 35 RECESSED LIGHTS, 4 CEILING FANS, 15 KEYLESS LIGHTS, 5 EX FANS, 10 SMOKES, 7 PHONE/TV, 2 FLOODS AS PER 2005 NEC (NORTH DISTRICT)
- PermitDemolition
Permit 128276 · COMPLETED
COMPLETE DEMOLITION OF SINGLE FAMILY DWELLING. DEMOLTION TO BEGIN ON OR AFTER 2/25/2008
- PermitZoning/use
Permit 128273 · COMPLETED
COMPLETE DEMOLITION OF SINGLE FAMILY DWELLING
- Land recordLand record
2008
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)