2026 assessment
$740K
OPA value, not a listing price
Multi-family report
664 Union St
6 bd4 ba3 stories2,778 sqftRSA5built 2023
Property at a glanceMulti-family
Entity-held
ZIP 19104 area
University City · West Powelton
600 block of Union 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$15K 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$33K 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$33K 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$33K 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$33K 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$33K 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$33K 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$34K 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$34K 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$740K 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$740K 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$748K 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 · 2021-06-16New construction, addition, GFA changeThis 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 · 2021-11-25New 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 · 2023-03-20New 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 · 2023-04-17New Construction or AdditionsThis 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 · 2023-05-10New 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 · 2023-05-15New 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 · 2011-08-01CLIP VIOLATION NOTICEA 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 · 2011-08-01EXT A-VACANT LOT CLEAN/MAINTAIA 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 ↗
- License · 2024-03-19MASKOFF LLC: 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 ↗
- Certification · 2024-08-01Sprinkler CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
- Certification · 2025-07-17Sprinkler CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
- Certification · 2026-07-01Fire Alarm CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
- Certification · 2026-07-02Sprinkler CertificationA filed inspection or certification for a regulated building system or component. Check the result, expiration date, and latest filing before treating it as current.What Philadelphia inspections check ↗
- Appeal · 2021-07-13ZBA Permit Denial - VarianceA challenge or request reviewed through a City appeals process. Filing an appeal does not show who prevailed; read the decision, conditions, and related permit or violation.How Philadelphia L&I appeals work ↗
Property assessmentBlock median & rangeZIP 19104 (University City · West Powelton) medianAssessmentL&I violationAppealPermitLicenseCertification
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 record14 events · exact dates, newest first
- CertificationSprinkler Certification
- CertificationFire Alarm Certification
- CertificationSprinkler Certification
- CertificationSprinkler Certification
- LicenseMASKOFF LLC: Rental landlord or residential registration initially issued
- PermitNew Construction
- PermitNew Construction
- PermitNew Construction or Additions
- PermitNew Construction
- PermitNew Construction
- AppealZBA Permit Denial - Variance
- PermitNew construction, addition, GFA change
- L&I violationCLIP VIOLATION NOTICE
- L&I violationEXT A-VACANT LOT CLEAN/MAINTAI
Flags: material assessment exemption; legal basis and term unverified · active rental license · historical tax ledger through 2016 recorded $7K with a lien entry · 1 zoning/board appeal on record. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$2,072/year estimated property tax
2026 taxable assessment $148,000 × 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 $748,300. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 2422382002026 OPA taxes $148,000 of $740,000 assessed. The assessment fields alone do not identify a program, approval date, expiration, or buyer eligibility.
See the assessment math →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 $6,775.79 and a lien entry. It is shown as historical context only.
1997$224.20 total · $60.82 principal · $104.92 interest · $4.26 penalty1998$120.67 total · $30.41 principal · $49.72 interest · $2.13 penalty1999$117.45 total · $30.41 principal · $46.99 interest · $2.13 penalty2000$114.21 total · $30.41 principal · $44.25 interest · $2.13 penalty2001$110.98 total · $30.41 principal · $41.51 interest · $2.13 penalty2002$107.75 total · $30.41 principal · $38.77 interest · $2.13 penalty2003$104.52 total · $30.41 principal · $36.04 interest · $2.13 penalty2004$101.29 total · $30.41 principal · $33.30 interest · $2.13 penalty2005$98.06 total · $30.41 principal · $30.56 interest · $2.13 penalty2006$94.84 total · $30.41 principal · $27.83 interest · $2.13 penalty2007$214.03 total · $85.16 principal · $70.26 interest · $5.96 penalty2008$217.91 total · $91.23 principal · $67.05 interest · $6.39 penalty2009$817.52 total · $392.31 principal · $253.04 interest · $27.46 penalty2010$775.85 total · $392.31 principal · $217.73 interest · $27.46 penalty2011$804.52 total · $431.14 principal · $200.48 interest · $30.18 penalty2012$787.06 total · $447.75 principal · $167.91 interest · $31.34 penalty2013$765.25 total · $463.85 principal · $132.20 interest · $32.47 penalty2014$438.16 total · $224.99 principal · $43.88 interest · $15.75 penalty2015$414.26 total · $224.99 principal · $23.63 interest · $15.75 penalty2016$347.26 total · $235.03 principal · $3.52 interest · $2.35 penalty
For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”
The assessment exemption gap
OPA's 2026 roll shows a partial assessment exemption. The annual difference is measurable; the reason for it and what happens after a sale are not established here.
$148,000 taxable basis
Difference to verify+$8,287/year
$740,000 scenario basis
The assessment roll does not identify
- Legal basis or program
- Approval or expiration date
- Treatment after a sale
- Current Tax Center balance
Show the assessment math
2026: ($740,000 assessed − $592,000 exempt) × 1.3998% ≈ $2,072/year
Full-assessment scenario: $740,000 × 1.3998% ≈ $10,359/year
Do not treat the full-assessment scenario as inevitable or assume the current relief transfers. Obtain the approval history and verify the live Tax Center account before relying on either number.
The property, on paper
OPA physical field record.
Bedrooms
6
Bathrooms
4
Stories
3
Interior
2,778 sqft
livable area
Lot
1,437 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
Newer construction
city code 1
Newer construction
Interior condition
Newer construction
city code 1
Newer construction
Zoning
RSA5
city zoning code
Zoning appeals
1
Completed · Granted · 2021
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Recorded owner
Who's behind it
Maskoff LLC · corporate / LLC owner
• Tax bills mail to Po Box 56025, Philadelphia PA, 19130
• Holds an active rental license for this address
Block context
600 block of Union St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 662 Union St · 666 Union 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.
MASKOFF LLCActive
Rental · Initial issue date Mar 19, 2024 · Filed expiration Mar 18, 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 14 dated rows
- CertificationSprinkler Certification
Certification BC-2026-019856 · Certified
Expires 2027-07-02
- CertificationFire Alarm Certification
Certification BC-2026-018906 · Certified
Expires 2027-07-01
- CertificationSprinkler Certification
Certification BC-2025-027698 · Certified
Expires 2026-07-17
- CertificationSprinkler Certification
Certification BC-2024-031569 · Certified
Expires 2025-08-01
- License issue eventMASKOFF LLC: Rental landlord or residential registration initially issued
License 947157 · Active
License event. Registration does not prove present operation or storefront occupancy.
- PermitNew Construction
Permit MP-2023-001110 · Completed
INSTALL NEW HVAC SYSTEM FOR A MULTIFAMILY DWELLINGS (3-UNITS) AS PER APPROVED PLAN. **2018 IMC REVIEW**
- PermitNew Construction
Permit EP-2023-003627 · Completed
Install 300 Amp Service 4 Meters 4 Panels, Wire Receptacles, Lighting & Install fire alarm . ALL WORK IS TO BE DONE ACCORDING TO APPROVED DRAWINGS-2017 NEC,2016 NFPA-72,2018 PHILA FIRE CODE.
- PermitNew Construction or Additions
Permit PP-2023-004508 · Completed
INSTALL 3 KITCHEN SINKS, 3 WASHING MACHINE BOXES, 3 HUB DRAINS, 1 FLOOR DRAIN, 1 ROOF DRAIN, 3 AREA DRAINS, 2 BACKWATER VALVES, 1 EJECTOR SUMP PUMP, 1 SUMP PUMP, 3 HOT WATER HEATERS, 1 HOSE BIBB, 8 LAVATORIES, 6 WATER CLOSETS, 4 SHOWER/TUBS, 1 CURB TRAP, 1 FAI, 1 BUILDING DRAIN AND 1-1/2 INCH WATER SERVICE ACCORDING TO THE 2018 PPC AND PER PLANS.
- PermitNew Construction
Permit FP-2023-000398 · Completed
FOR THE INSTALLATION OF A NFPA 13R SYSTEM FOR A MULTI-FAMILY DWELLING SERVICED BY A TWO (2) INCH FIRE SERVICE LINE WITH A 2-INCH WILKINS 950XLT2 BACKFLOW PREVENTER AND AUTOMATIC FIRE SUPPRESSION SYSTEM. ALL WORK SHALL BE DONE IN ACCORDANCE WITH APPROVED PLANS/HYDRAULIC CALCULATIONS.
- PermitNew Construction
Permit CP-2021-006567 · Completed
FOR NEW CONSTRUCTION OF A THREE-STORY ATTACHED BUILDING WITH CELLAR, SECOND-FLOOR REAR DECK, ROOF DECK AND ROOF-DECK ACCESS STRUCTURE PER APPROVED PLANS. BUILDING TO BE FULLY SPRINKLERED WITH NFPA 13R MINIMUM. SEPARATE PERMITS REQUIRED FOR MECHANICAL, ELECTRICAL, PLUMBING AND FIRE SPRINKLER.
- AppealZBA Permit Denial - Variance
Appeal ZP-2020-006887 · Completed · Granted
Related permit ZP-2020-006887 · Must Be Heard PERMIT FOR THE ERECTION OF AN ATTACHED STRUCTURE (HEIGHT NTE 38 FEET) WITH PILOTHOUSE (HEIGHT NTE 10 FEET; AREA NTE 125 SF; FOR ACCESS STAIRS ONLY) TO ACCESS ROOF DECK WITH 42-INCH GUARD RAILS, FOR USE AS HOUSEHOLD LIVING (T
- PermitNew construction, addition, GFA change
Permit ZP-2020-006887 · Completed
FOR THE ERECTION OF AN ATTACHED STRUCTURE (HEIGHT NTE 38 FEET) WITH PILOTHOUSE (HEIGHT NTE 10 FEET; AREA NTE 125 SF; FOR ACCESS STAIRS ONLY) TO ACCESS ROOF DECK WITH 42-INCH GUARD RAILS. SIZE AND LOCATION AS SHOWN IN THE APPLICATION/PLANS.
- ViolationCLIP VIOLATION NOTICE
Case 289373 · Violation 2160831 · Code CP-01 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
- ViolationEXT A-VACANT LOT CLEAN/MAINTAI
Case 289373 · Violation 2160832 · Code PM-302.2/4 · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
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, 9:00 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)