2026 assessment
$853K
OPA value, not a listing price
Multi-family report
521 N 11th St
5 bd3 stories2,132 sqftRM1built 2021
Property at a glanceMulti-family
Entity-held
ZIP 19123 area
Northern Liberties · Callowhill
500 block of N 11th 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$35K 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$106K 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$106K 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$106K 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$106K 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$106K 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$620K 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$620K 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$620K 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$853K 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$853K 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$835K 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 · 2019-03-25Zoning/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 · 2019-09-25New 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 · 2020-02-20New 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 · 2020-09-03New 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 · 2020-10-26New 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 · 2020-11-07New 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 · 2021-06-03New 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 · 2021-08-23New 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 · 2022-12-28Change of 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 ↗
- L&I violation · 2013-07-25CLIP 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 · 2013-07-25EXT 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 ↗
- L&I violation · 2021-06-09WORK NOT ACCORDING TO PLANSA 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 · 2021-06-09L&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 · 2022-03-29L&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 ↗
- License · 2023-01-03Liam Flaherty: Limited Lodging Operator 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 ↗
- License · 2022-05-10Bala Spring Estate 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 ↗
- License · 2026-07-08Bala Spring Estate LLC: Rental landlord or residential registration marked inactiveA 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 ↗
Property assessmentBlock median & rangeZIP 19123 (Northern Liberties · Callowhill) medianAssessmentL&I violationPermitInspectionLicense
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 record17 events · exact dates, newest first
- LicenseBala Spring Estate LLC: Rental landlord or residential registration marked inactive
- LicenseLiam Flaherty: Limited Lodging Operator landlord or residential registration initially issued
- PermitChange of Use
- LicenseBala Spring Estate LLC: Rental landlord or residential registration initially issued
- InspectionL&I investigation
- PermitNew Construction or Additions
- L&I violationWORK NOT ACCORDING TO PLANS
- InspectionL&I investigation
- PermitNew Construction
- PermitNew Construction or Additions
- PermitNew Construction
- PermitNew Construction
- PermitNew Construction
- PermitNew Construction
- PermitZoning/use
- L&I violationCLIP VIOLATION NOTICE
- L&I violationEXT A-VACANT LOT CLEAN/MAINTAI
Flags: material assessment exemption; legal basis and term unverified. Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$2,387/year estimated property tax
2026 taxable assessment $170,500 × 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 $835,300. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 1411264002026 OPA taxes $170,500 of $852,500 assessed. The assessment fields alone do not identify a program, approval date, expiration, or buyer eligibility.
See the assessment math →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 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.
$170,500 taxable basis
Difference to verify+$9,546/year
$852,500 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: ($852,500 assessed − $682,000 exempt) × 1.3998% ≈ $2,387/year
Full-assessment scenario: $852,500 × 1.3998% ≈ $11,933/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
5
Stories
3
Interior
2,132 sqft
livable area
Lot
920 sqft
Basement
Full, finished
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
RM1
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Recorded owner
Who's behind it
Bala Spring Estate LLC · corporate / LLC owner
• Owns 3 properties across Philadelphia under this name, assessed at $2.5M combined
• Tax bills mail to 8 Barn Owl CT, Phoenixville PA, 19460 — outside Philadelphia
Block context
500 block of N 11th St. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 519 N 11th St · 523 N 11th 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.
Liam FlahertyActive
Limited Lodging Operator · Initial issue date Jan 3, 2023 · Filed expiration Jan 2, 2027
Bala Spring Estate LLCInactive
Rental · Initial issue date May 10, 2022 · Terminal license date Jul 8, 2026
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 17 dated rows
- License terminal eventBala Spring Estate LLC: Rental landlord or residential registration marked inactive
License 894529 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- License issue eventLiam Flaherty: Limited Lodging Operator landlord or residential registration initially issued
License 913666 · Active
License event. Registration does not prove present operation or storefront occupancy.
- PermitChange of Use
Permit ZP-2022-014380 · Issued
Limited Lodging
- License issue eventBala Spring Estate LLC: Rental landlord or residential registration initially issued
License 894529 · Inactive
License event. Registration does not prove present operation or storefront occupancy.
- InvestigationL&I investigation
Case CF-2021-049303 · PASSED
The cited inspection visit was marked passed.
- PermitNew Construction or Additions
Permit PP-2021-015425 · Completed
Installing Two 1" Water Services, 5" Curb Trap, 4" Main Drain & 4" Fresh Air Inlet
- ViolationWORK NOT ACCORDING TO PLANS
Case CF-2021-049303 · Violation VI-2021-036350 · Code A-302.10/2 · COMPLIED
Resolution: COMPLIED - OWNER REPAIR City marked this violation complied with; check the resolution date and live case for what was accepted.
- InvestigationL&I investigation
Case CF-2021-049303 · FAILED
The cited inspection visit was marked failed; later rows may show follow-up or resolution.
- PermitNew Construction
Permit RP-2020-011746 · Completed
FOR THE ERECTION OF AN ATTACHED THREE STORY STRUCTURE OF TYPE VB CONSTRCUTION WITH A CELLAR AND ROOF DECK WITH A ROOF ACCESS FOR A SINGLE FAMILY DWELLING AS PER PLANS.
- PermitNew Construction or Additions
Permit PP-2020-007647 · Completed
For minor construction work at the subject property in accordance with all applicable provisions of the Philadelphia Code, all references codes and standards, and the attached EZ Standard, where included. Deviation from this standard shall result in permit revocation. A separate permit from the Philadelphia Department of Streets is required for any sidewalk and street closures. All means of pedestrian protection required at the site in accordance with the Philadelphia Building Code Chapter 33 shall be in place prior to start of work.
- PermitNew Construction
Permit FP-2020-001534 · Completed
INSTALL NEW FIRE SUPPRESSION SYSTEM AND 1" COMBINED SERVICE IN ACCORDANCE WITH NFPA 13D THROUGHOUT THE ENTIRE BUILDING. ALL WORK SHALL COMPLY WITH THE APPROVED PLANS. ALL WORK SHALL BE PERFORMED BY A FIRE SUPPRESSION CONTRACTOR LICENSED BY THE CITY OF PHILADELPHIA.**
- PermitNew Construction
Permit MP-2020-003425 · Completed
EZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from these standards require submission of construction and site plans. EACH HVAC UNIT TO BE SELF-CONTAINED WITHIN EACH DWELLING UNIT. NO PENETRATIONS OF RATED ASSEMBLIES.
- PermitNew Construction
Permit 1051453 · Completed
300AMP SERVICE COMPLETE AND WIRE THROUGHOUT SWITCHES, OUTLETS, LIGHT FIXTURES & SMOKE DETECTORS AS PER NEC 2014 NORTH CENTRAL
- PermitNew Construction
Permit 1008005 · Completed
FOR THE CONSTRUCTION OF AN ATTACHED STRUCTURE WITH CELLAR AND ROOF DECK ACCESSED BY A ROOF DECK ACCESS STRUCTURE. FOR USE AS A TWO (2) FAMILY HOUSEHOLD LIVING. AS PER PLANS.
- PermitZoning/use
Permit 957958 · COMPLETED
FOR THE ERECTION OF AN ATTACHED STRUCTURE WITH CELLAR, ROOF DECK WITH PILOT HOUSE AND FRONT BAY WINDOW ON SECOND AND THIRD FLOOR (SIZE AND LOCATION AS SHOWN ON THE PLAN) TO USE AS TWO (2) FAMILY HOUSEHOLD LIVING.
- ViolationCLIP VIOLATION NOTICE
Case 393624 · Violation 2876343 · 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 393624 · Violation 2876344 · 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 24, 2026, 5:30 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)