Improved
Why it mattersOwner pulled a major alteration permit in 2008.
View supporting records →Commercial property report
8,500 sqft · CMX3 · built 1900
Commercial · Michael Kurland · assessed $2.2M. On the 100 block of Arch St.

Owner pulled a major alteration permit in 2008.
View supporting records →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.
View supporting records →Early patterns mined across this property's dated public records. Each flag shows what triggered it and where the inference stops.
The assessment jumped 100% in 2027, but no matching permit appears in the property timeline.
Evidence: assessment moved from $1,107,000 to $2,212,700 · no permit shown in 2026-2028
Limit: Not proof of unpermitted work; reassessment, corrected data, or a permit under another parcel can also explain it.
Transparent record rules, not a machine-learning forecast. A signal is a prompt to verify the cited record, not a prediction or allegation.
This is a commercial, recorded under the city's commercial category. The homeowner tools (rent estimate, homestead playbook) don't apply, so they're hidden. The full record and owner trail are below.
Places where the city's own paperwork disagrees with itself. These are flags on the data — not problems with the property.
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.
120 Arch St sits on the 100 block of Arch St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 122-24 Arch St · 116-18 Arch St
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.
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Built 1900. Every deed, permit, L&I visit, tax bill and sale for this house — plus its whole block.
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On the way down: the story of the house, its paper trail drawn on the value chart, and run-the-numbers, a calculator seeded with this house's actual tax bill.
Official city record ↗ · L&I history ↗ · See the whole block · Download this record (JSON)