Where LienWatch Data Comes From
A plain-language description of every data source we use, how often we refresh it, and what the AI layer actually does with it.
County delinquent property tax lists (Tax Liens & Tax Deeds)
Scraping crons are currently disabled. The documented Florida county sources and national scraper layer are not represented as live workflows until scraping is independently enabled and proven. Current pull-list availability is verified separately and varies by location.
Current status:
- Scheduled scraping: disabled.
- Auction calendars: curated/static reference data with no live refresh asserted.
- Pull-list readiness: independently verified before any location is offered as available.
Source list and per-source configuration are documented internally in our docs/scraper-architecture.md. Some HTML county pages change layout without notice — when a source breaks, that county's results fall back to the seed dataset or return zero rows until the next successful scrape.
Related pages: About · Auction Calendar.
AIEVR nationwide valuation reports (every US address)
AIEVR generates on-demand property valuation reports for any US address. The pipeline layers four data sources together:
- External property data lookup — beds, baths, square footage, lot size, year built, last sale price and date.
- AI-generated narrative and value range — surfaces listing-copy details, comparable sales within a 1.5-mile radius, neighborhood character.
- Geocode resolution (city + state fallback chain) to anchor comparable searches to real coordinates.
- Multi-tier photo fetcher — primary listing tier → secondary listing tier → image-search tier → county records → static map tile.
LienWatch does not operate a direct government feed for AIEVR valuation data. External data is fetched across multiple independent sources and reconciled before reporting. Specific vendor identities are not disclosed; results are surfaced as facts. Where every lookup returns nothing, the report renders a “valuation unavailable” marker rather than a fabricated value.
Auction calendar registry (canonical Tax Lien classification roster)
Where a state treasury office publishes an annual or bi-annual auction calendar but does not publish machine-readable data, our staff maintains a curated registry of auction timing (see scraper/tax-lien/sources/registry.js). This is human-curated calendar data, not real-time scraping.
- Cadence: curated/static registry with no automated refresh currently asserted.
- Scope: educational and reference timing only; pull-list readiness is independently verified.
Related page: Auction Calendar.
How property scoring works
Every listed property is graded A through F by a rules-based scorer that weighs estimated ROI, LTV ratio, interest rate (for liens), and active-deals count. The scorer (scraper/scorer.js) is deterministic — the same inputs always produce the same grade.
Grades are advisory, not a recommendation; always do your own due diligence before bidding.
Property photos and street view
Property photos come from a tier waterfall — primary listing tier → secondary listing tier → image-search tier → county records → static map tile → street-level imagery. When every tier fails, the property card shows a placeholder map tile so the address and listing metadata stay legible without a fabricated image.
We do not own or upload photos ourselves — we render what listing-side and map providers publish.
What we don't do
Not appraisals. AIEVR valuations are AI research, not licensed appraisals. They are not a substitute for a state-licensed appraisal when one is required for financing, legal, or tax purposes.
Honors robots.txt. We do not scrape any site that has explicitly asked us not to. Our national-deals crawler follows robots.txt directives and we pause a source the moment a publisher signals a stop.
No data selling. We do not sell user data. Account information stays in our billing system; usage logs stay with us.