Land report

4231 Leiper St

Vacant lot · Frankford Aluminum Window · tax-exempt. On the 4200 block of Leiper St.

Property summary

Assessment$170KCity assessed value Last sale$8KRecorded 1988 Est. annual tax$0/yearTax-exempt assessment Tax delinquency—Snapshot unavailable Permits—Record unavailable ViolationsNone openNone open when assembled

Report assembled Jul 10, 2026 “Open” reflects records available then historical records keep their source dates estimates are labeled

BlockReport AI · cited public records

Ask the questions this record raises.

These curated questions are free. Choose one to open its cited answer.

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:

Street view of 4231 Leiper St — From the street — imagery © Google

From above — imagery © Esri, Maxar

Vacant landLand report

An empty lot: no building, just the land and its paper trail. The homeowner tools don't apply; the deed history, owner and zoning are below, and the analyst can trace what the owner holds citywide.

What it is

Vacant lot

Vacant Land Indust < Acre

Owner

Frankford Aluminum Window

Tax standing

Tax-exempt

Pays no property tax

Assessed value

$170K

City market value

Lot size

17,023 sqft

Zoning

Block context

4231 Leiper St sits on the 4200 block of Leiper St. Open the block report to compare its parcels, ownership and public-record history.

See the whole block →

Next door: 4235 Leiper St · 4211-15 Leiper 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

Methodology & freshness

Available City datasets are queried from OpenDataPhilly (phl.carto.com), then reports are cached and refreshed on a rolling schedule. Source dates vary: the parcel-level tax-delinquency snapshot is June 2022 and the separate detailed tax ledger ends in 2016, so neither establishes today’s balance. Other dossiers re-pull on view once stale, and citywide benchmarks recompute weekly. AI-written passages are generated from these records only and rejected if they state a number the record doesn't hold.

BlockReport AICited sources

Ask about this commercial property across deeds, permits, violations, dated taxes, ownership, and comparable context. Curated questions are free; ask 3 custom questions per browser. Analyst includes up to 150 custom questions per day.

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.

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.

Informational only. Not legal, financial, or investment advice. Not a consumer report under the FCRA — it may not be used to decide anyone's eligibility for housing, tenancy, employment, credit, or insurance.

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