Data sources
Every number in every document traces to a named county or federal record. If you are the sort of buyer who asks where a figure came from before using it, this page is for you.
What we use
- Douglas County Assessor — bulk assessment extract, supplied through DOTComm. Assessed value and tax district.
- Douglas County Treasurer — bulk extract. The tax actually billed, which is what every Douglas saving figure is a share of.
- Omaha/Douglas County GIS — the public parcel layer. Building area, year built, quality and condition.
- Sarpy County Citizen Access portal — annual assessment exports, twenty-one years of them.
- Sarpy County GIS — the parcel layer.
- FEMA National Flood Hazard Layer and US Census — context, not used in an equalization analysis.
What we deliberately do not use
No Multiple Listing Service data. We asked. Great Plains Regional MLS confirmed in writing that no licence permits distributing listing data to independent subscribers, even through a broker. So listings are out of scope entirely, and the deliverables that would have depended on them were removed rather than deferred.
No scraped listing portals. Technically possible and rejected on terms of use — a product whose argument is that it is grounded in verified sourcing cannot rest on a source acquired against its terms.
Why this is a selling point
Public records carry no licensing constraint on who may buy an analysis built from them. You can put the sources on the face of a filing, and a board can check any of them. That is a narrower dataset than a listing-backed one and a more defensible document.