domain: real-estate-general · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Identify the permit data source for the target jurisdiction: many large cities publish permit data on open data portals (data.cityname.gov) or via Socrata/ArcGIS APIs; commercial aggregators like BuildZoom or PermitData consolidate multi-jurisdiction data.
Query the permits dataset by address or parcel number; filter for permits issued within your desired time window (e.g., last 10 years).
Parse permit records: extract permit number, issue date, finaled/closed date, permit type (building, electrical, plumbing, mechanical, demolition), work description, valuation, and status.
Identify red flags: permits that were issued but never finaled (closed), demolition permits on a property listed as improved, or permits that suggest unpermitted additions when compared to assessor records.
Aggregate permits by type to summarize: number of building permits, most recent structural permit date, open/expired permits.
Return the permit history list plus a flag for any open or expired permits that may affect title or financing.
Known gotchas
Permit data from open data portals is often 30–90 days behind actual issuance; very recent permits may not appear.
Address matching in permit databases is unreliable — the same property may appear under multiple address variants; match by parcel number (APN) when possible to get a complete history.
Unpermitted work cannot be detected from permit data alone; the absence of a permit for work visible in listing photos is a signal but not confirmation.
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