2026 taxable assessment $131,800 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $153,800; it is not the 2026 billed-year value.
House report
637 Mercy St
3 bd · 1 ba · 2 stories · 1,080 sqft · RSA5 · built 1925
Individual, other or unknown mailing address · assessed $132K (2026) · 2027 OPA assessment $154K · sold 1×. On the 600 block of Mercy St.
BlockReport AI · cited public records
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Property summary
Assessment$131,8002026 OPA assessment · 2027: $153,800
Last sale$4KRecorded 2000 · later nominal deed
Est. tax bill$1,845/year2026 taxable assessment × 1.3998%
Tax delinquencyNo 2022 matchNot proof account is current
Permits5Every fetched City permit
Violations0 open10 historical across 3 cases
“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 3930429002026 taxable assessment equals the full assessed value.
Historical delinquency sources Record found
This parcel did not match the June 2022 delinquency snapshot. That absence does not confirm the account is current today.
A separate historical parcel ledger ending in 2016 records $3,676.87 and a lien entry. It is shown as historical context only.
2015$1,473.91 total · $1,022.49 principal · $107.36 interest · $71.58 penalty2016$2,202.96 total · $1,942.99 principal · $29.14 interest · $19.43 penalty
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 recordPermit on record
Record summary$4K transfer recorded in 2000. Alterations permit recorded in 2025.
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
Built 1925: lead rules apply
Federal law requires a lead-paint disclosure at sale for any pre-1978 home. If it will be rented, Philadelphia also requires a lead-safe or lead-free certificate before a rental license can issue.
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.
The last transfer used nominal consideration
The latest deed records $100 or less. That is not a usable market-sale price and can reflect a family, estate, gift, correction, or entity transfer. Inspect the deed and order a title search rather than inferring the relationship or chain.
If you own it
$3,677 in the historical tax ledger through 2016
Historical context only, not a current payoff figure; that ledger also contains a lien entry. Verify today's balance and lien status directly with Philadelphia Revenue before relying on it.
If you’re the landlord
If it is rented, verify the Rental License
The fetched license records do not show an active Rental License. Ownership type or a tax mailing address does not prove that tenants occupy the property; if it is rented, verify the current license and legal occupancy in eCLIPSE.
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
$131,800
2026 billed-year assessment · 2027: $153,800 · built 1925
Price / sq ft
$142
block $262 · below block
Assessment change
+27%
+2%/yr since 2016 · 2027 +17% vs 2026
Est. tax bill / yr
$1,845
1.4% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Times sold
1
Assessment vs. the block and ZIP · every dated City record marked on the line
- OPA assessment · 2016$121K 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$121K 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$121K 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$60K 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$65K 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$65K 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$65K 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$98K 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$98K 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$132K 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$132K 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$154K 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 · 2000Deed / sale $4KA 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 · 2016-10-04Major 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 · 2017-02-10ZoningThis 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 · 2025-07-25Addition 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 · 2025-07-30AlterationsThis 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 · 2016-08-30VACANT STRUCTURE LICENSEA 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 · 2016-08-30DOOR AND WINDOW VACANTA 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 · 2016-08-30VACANT STRUCTURE AND LANDA 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 · 2016-08-30VACANT AND OPENA 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 · 2023-05-16ALTER INTERIOR PORTIONA 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 · 2023-05-16NEW ELECTRICAL SERVICEA 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 · 2023-05-16ALTER ELECTRICAL WIRINGA 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 · 2023-05-16NEW PLUMBINGA 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 · 2023-05-16DUCTWORKA 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 · 2016-11-21HCEU 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 · 2023-12-05L&I investigationA 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 · 2025-12-12L&I investigationA 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 · 2026-05-30L&I investigationA 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 19148 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 record18 events · exact dates, newest first
- InspectionL&I investigation
- InspectionL&I investigation
- PermitAlterations
- PermitAddition and/or Alteration
- InspectionL&I investigation
- L&I violationALTER INTERIOR PORTION
- L&I violationNEW ELECTRICAL SERVICE
- L&I violationALTER ELECTRICAL WIRING
- L&I violationNEW PLUMBING
- L&I violationDUCTWORK
- PermitZoning
- InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
- PermitMajor alteration
- L&I violationVACANT STRUCTURE LICENSE
- L&I violationDOOR AND WINDOW VACANT
- L&I violationVACANT STRUCTURE AND LAND
- L&I violationVACANT AND OPEN
- Deed / saleDeed / sale $4K
The paper trail
Permit on record$4K transfer recorded in 2000. Alterations permit recorded in 2025.
- 2000 $4KTransfer
- 2016 5 L&I violationsL&IL&I: 2 failed, 2 passedL&I visitMajor alterationPermit
- 2017 ZoningPermit
- 2023 5 L&I violationsL&IInspection failed ×3L&I visit
- 2025 Addition and/or AlterationPermitAddition and/or AlterationPermitAlterationsPermitInspection failed ×2L&I visit
- 2026 Inspection failed ×2L&I visit
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 21 dated records deeds, permits, inspections, licenses, violations, certifications & appeals
- InvestigationL&I investigation
Case CF-2023-044544 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitAlterations
Permit PP-2025-009716 · Expired
1 Full Bath 1 Kitchen Sink REPLACE 4 FIXTURES
- PermitAddition and/or Alteration
Permit RP-2025-006519 · Expired
For alterations to a Single Family Dwelling Property 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 but not limited to any modification to exterior walls, party wall, floor/roof framing and foundations, including underpinning, excavation and removal of foundation slab. ***NO WORK MAY BE PERFORMED IN THE BASEMENT OR CELLAR.*** Separate permits required for Mechanical, Electric and Plumbing.
- PermitAddition and/or Alteration
Permit EP-2025-005955 · Issued
INSTALL 200 AMP ELECTRICAL SERVICE, METER SOCKET AND CIRCUIT BREAKER PANEL WITH PROPER GROUNDING AND BONDING. REWIRE HOUSE THROUGHOUT AND INSTALL LIGHTING, SWITCHES AND RECEPTACLE OUTLETS. INSTALL 120 VOLTS INTERCONNECTED SMOKE AND CO ALARMS ALL WORK TO BE DONE ACCORDING TO THE 2017 NEC. ************************* FISHING WIRES ONLY ***************************************
- ViolationALTER INTERIOR PORTION
Case CF-2023-044544 · Violation VI-2023-034162 · Code A-301.1/4 · OPEN
- ViolationNEW ELECTRICAL SERVICE
Case CF-2023-044544 · Violation VI-2023-034163 · Code A-301.1/49 · OPEN
- ViolationALTER ELECTRICAL WIRING
Case CF-2023-044544 · Violation VI-2023-034164 · Code A-301.1/51 · OPEN
- ViolationNEW PLUMBING
Case CF-2023-044544 · Violation VI-2023-034165 · Code A-301.1/54 · OPEN
- ViolationDUCTWORK
Case CF-2023-044544 · Violation VI-2023-034166 · Code A-301.1/43 · OPEN
- PermitZoning
Permit 740448 · COMPLETED
APPLICATION IS FOR THE ONE STORY ADDITION TO AN EXISTING TWO STORY SINGLE FAMILY ATTACHED STRUCTURE. DETAILS AS SHOWN IN THE ATTACHED PLAN.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 553012 · 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.
- InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 553010 · 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.
- PermitMajor alteration
Permit 726833 · EXPIRED
INTERIOR ALTERATIONS TO INCLUDE DRYWALL THROUGHOUT, MOISTURE RESISTANT DRYWALL IN THE BATHROOM AND KITCHEN, NEW WINDOWS AND DOORS IN EXISTING OPENING. APPLICANT AGREES TO LIMIT THE CONSTRUCTION TO COMPLY WITH EZ PERMIT STANDARD FOR INTERIOR ALTERATIONS, DATED JANUARY 2011. DEVIATION FROM THE STANDARD WILL RESULT IN REVOCATION OF THIS PERMIT AND IMPOSITION OF FURTHER PENALTIES. SEPARATE PERMITS REQUIRED FOR PLUMBING, ELECTRICAL AND MECHANICAL WORK
- ViolationVACANT STRUCTURE LICENSE
Case 553010 · Violation 4067348 · Code 9-3905 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationDOOR AND WINDOW VACANT
Case 553010 · Violation 4067350 · Code PM15-304.19V · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationVACANT STRUCTURE AND LAND
Case 553010 · Violation 4067349 · Code PM15-301 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationVACANT STRUCTURE AND LAND
Case 553012 · Violation 4067362 · Code PM15-301 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationVACANT AND OPEN
Case 553012 · Violation 4067361 · Code PM15-108.2 · 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 553012 · 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 553010 · 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.
- Recorded transfer$4K transfer
2000
What this record suggests
The City file documents 5 permits touching kitchen work, bathroom work, drywall / interior finishing, electrical work. 2 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
Flags: historical tax ledger through 2016 recorded $4K with a lien entry. 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
3
Bathrooms
1
Stories
2
Interior
1,080 sqft
livable area
Lot
701 sqft
Basement
Full, unfinished
city code C
Heat
Forced hot air
city code A
Central air
No
Exterior condition
Sealed / compromised
city code 7
Sealed / compromised
Interior condition
Sealed / compromised
city code 7
Sealed / compromised
Quality grade
C
assessor's grade
ABCDE
Zoning
RSA5
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Run the numbers
What owning 637 Mercy St takes, at your price and your rate. Taxes start with an annual estimate from the City’s taxable assessment, not a current bill or balance; rent starts at the area median. Assessed value is not an asking price — set the price slider to the real one.
Mortgage
—
P&I · 30-yr fixed
All-in monthly
—
+ taxes & insurance
Estimated cash needed
—
down + 4% planning allowance
Modeled cash flow
—
rent − shown costs · /mo
Modeled cap rate
—
modeled NOI ÷ price
Modeled cash-on-cash
—
modeled year-1 return
Scenario for orientation, not advice. Assumes a 30-year fixed loan, $1,400/yr insurance, 1% of price/yr maintenance, and buyer cash equal to the down payment plus 4%. Taxes use this parcel's taxable assessment, not a live Tax Center balance. Cash flow and returns exclude vacancy, management, utilities, HOA or condo fees, leasing costs, income tax, and unplanned capital work.
Block context
637 Mercy St sits on the 600 block of Mercy St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 635 Mercy St · 639 Mercy 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, 1:32 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)