Mixed-use property report

524 N 12th St

1,701 sqftCMX3built 1900

Property at a glanceApartment building

Dai Zheng & Huang LLP

2026 assessment

$322K OPA value, not a listing price

2027 published assessment

$321K Future roll, not the current tax bill

Location

500 block of N 12th St ZIP 19123

Neighborhood area

Northern Liberties · Callowhill Approximate · based on ZIP 19123

From above · selected parcel outlined; choose a neighboring polygon to open it — imagery © Esri, Maxar

Assessment and City record timeline

The line tracks this property’s published City assessment. Markers show deeds, permits, inspections, licenses, violations, certifications, and appeals on their recorded dates. Select one to read the filing.

Assessments are tax-roll values, not sale prices or appraisals. OPA has published a 2027 assessment of $321,400. It is not yet the billed-year tax basis.

Property assessmentAssessmentL&I violationInspectionLicense

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 record10 events · exact dates, newest first

2017-06-14InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
2017-05-16InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
2017-05-03L&I violationMULTI FAMILY (R2)
2017-05-03InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
2017-04-12InspectionPRECOURT (likely: pre-court compliance inspection)
2017-01-09InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
2016-11-28InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
2016-10-18L&I violationMULTI FAMILY (R2)
2016-10-18InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
2010-01-21LicenseDAI ZHENG & HUANG LLP: Rental landlord or residential registration initially issued

Verify the public record

Property tax

$4,512/year estimated property tax

2026 taxable assessment $322,300 × 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 $321,400. It is not the 2026 billed-year value.

Current City balanceCheck Tax Center

Payments, credits, interest, and the current amount due are maintained by the City.

OPA 871600475

Open Philadelphia Tax Center →Use “View period balance” to inspect each tax year.

Exemption classificationNo exemption shown

2026 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.”

Where the record looks off

Conflicts in City paperwork. Flags on the data, not the property.

"Built 1900" is usually a placeholder

Philadelphia records use 1900 as a stand-in when the real construction year was never documented. Treat the age as unknown, not as 120+ years.

Property report

Mixed-use property

Apartment building, recorded in the City's mixed-use category. The public record and owner trail follow.

What it is

Apartment building Str/Off+Apt 3 Sty Masonry

Owner

Dai Zheng & Huang LLP

$ / sq ft

$189 assessed value ÷ interior sqft

Corridor

Spring Garden/9th-13th city commercial corridor

Licensed units

2 active rental license

Interior area

1,701 sqft

Lot size

1,304 sqft

Built

1900

Zoning

CMX3

Recorded owner

Who's behind it

Dai Zheng & Huang LLP · corporate / LLC owner

• Owns 2 properties across Philadelphia under this name, assessed at $750K combined
• Tax bills mail to 437 Gaskill St, Philadelphia PA, 19147
• Holds an active rental license for this address

PA corporate registry ↗OpenCorporates ↗City record ↗

Block context

500 block of N 12th St. Compare parcels, ownership, and public-record history.

See the whole block →

Next door: 526 N 12th St · 520 N 12th St

L&I license dates · data through Jul 21, 2026

Business licenses at this address Latest pull

What L&I has registered at this OPA parcel, newest initial license date first.

Open the City record ↗

No L&I business license is on record at this address in data through Jul 21, 2026.

Landlord and residential filings

These are property registrations or landlord filings, not businesses operating at this address.

DAI ZHENG & HUANG LLPActive

Rental · Initial issue date Jan 21, 2010 · Filed expiration Feb 28, 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 10 dated rows

Jun 14, 2017
InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 578691 · 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.
May 16, 2017
InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 581750 · 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.
May 3, 2017
ViolationMULTI FAMILY (R2)
Case 581750 · Violation 4299078 · Code 9-3902 (2) · COMPLIED
City marked this violation complied with; check the resolution date and live case for what was accepted.
May 3, 2017
InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 581750 · 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.
Apr 12, 2017
InvestigationPRECOURT (likely: pre-court compliance inspection)
Case 560135 · CLOSED
A follow-up before or during enforcement escalation; confirm the case sequence in the City file. City marked the record closed; open the case for the closing reason.
Jan 9, 2017
InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 560135 · CLOSED
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. City marked the record closed; open the case for the closing reason.
Nov 28, 2016
InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 560135 · 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.
Oct 18, 2016
ViolationMULTI FAMILY (R2)
Case 560135 · Violation 4192623 · Code 9-3902 (2) · CLOSEDCASE
City marked the case closed; that does not mean the original condition never existed.
Oct 18, 2016
InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)
Case 560135 · 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.
Jan 21, 2010
License issue eventDAI ZHENG & HUANG LLP: Rental landlord or residential registration initially issued
License 492232 · Active
License event. Registration does not prove present operation or storefront occupancy.

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

Methodology & freshness

This report was assembled Jul 22, 2026, 11:00 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.

BlockReport AICited sources

Ask about this commercial property. Every answer cites the records it uses.

About this data & fine print

Answers are generated by an AI agent querying available City of Philadelphia open data at the moment you ask: OPA property assessments, Recorder of Deeds transfer records, L&I permits, violations & licenses, dated Dept. of Revenue tax records, Zoning Board appeals, Police incident reports, Philly311 requests, and School District of Philadelphia catchment and school data. When you explicitly request a web check, or ask about a current listing or recent news, the agent can also run a cited public-web search; those claims are labeled separately from City records.

For an explicit web search or a current listing/news question, the agent may also search the public web through OpenRouter and must link every web-derived claim. Public listing pages can be stale and are not direct or comprehensive MLS access.

Property-level tax data is historical: the delinquency snapshot is dated June 2022 and the separate detailed ledger ends in 2016. Neither shows what is owed today; verify a current balance with Philadelphia Revenue.

City data is published as-is and can lag, contain errors, or be corrected later; school performance datasets run years behind and are labeled with their school year. AI answers can contain mistakes. Verify anything that matters against the official record (property.phila.gov, atlas.phila.gov) before acting on it.

AI-generated content; informational purposes only. Answers are generated by artificial intelligence, may contain errors or omissions, are not reviewed by a person before delivery, and are not statements of fact about any person or property. Nothing here constitutes legal, tax, accounting, financial, investment, appraisal, or real-estate brokerage advice. This tool is not a consumer report under the Fair Credit Reporting Act, 15 U.S.C. § 1681 et seq., and may not be used to determine any individual's eligibility for credit, insurance, employment, housing or tenancy, or any other FCRA-covered purpose.

Official city record ↗ · L&I history ↗ · See the whole block · Download this record (JSON)