How we build the list
Rows start as deed records from public property data. The pipeline keeps homes bought to live in, adds property facts where available, and sends files on delivery day.
The pipeline
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1
Fetch
At the set read time, the pipeline pulls the deed records posted since the last read.
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2
Filter
Each row is tested against its area's new-owner rules, which depend on the fields that area's deed records carry. Records that fail any rule are dropped with a reason code so the counts can be audited.
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3
Join
An assessor match adds year built and house size where the area's records have them. A permit match adds whether a roof or HVAC permit is on file where the area publishes permits. Some places let a roof or heating and cooling job go without a permit, so "none on file" doesn't mean the work wasn't done. See the Coverage page for which areas carry year built, house size and permit fields.
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4
Suppress
Before the pipeline generates a file or API response, it checks the suppression list. Names on that list are removed from that run. The system logs which suppression list version was used for each delivery.
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5
Deliver
A weekly CSV and a postcard-ready file are generated for each customer and held for download for 90 days.
Who counts as a new owner
A new owner is a person who made an arm's-length purchase of a home to live in, as the area's deed records show.
How numbers are published
To protect privacy and report accurately, four thresholds apply to counts, medians and shares on the public site.
- 5A count under 5 is not published.
- 10A median needs at least 10 sales to be published.
- 20A share needs at least 20 sales total, with at least 5 on each side.
- 100A place page needs at least 100 qualifying sales in the last 90 days to appear on the public site.
Why we credit sources
Readers can check the data when sources and versions are credited. The trade guides link to the Sources page, which lists every data set. Each city or county page credits its market's data sets by agency and version.
What we changed
The deed records are processed before they appear on this site or in a delivered file. The Sources page lists, for each area, the kinds of rows HelloSuey leaves out and the city spellings it merges.