How CURVE sources condo data
CURVE compiles condominium sales directly from the public deed registries — recorded transactions, reconciled to the building and unit. Not listings, not automated estimates. This is what makes every figure on CURVE a registry-verified fact.
Where the data comes from
Every sale on CURVE traces to an official public record. By market:
| Market | Public record source | Buildings | Recorded sales |
|---|---|---|---|
| Boston | Massachusetts Registry of Deeds | 1,965 | 46,516 |
| Miami | Miami-Dade County Clerk of the Courts | 1,500 | 338,779 |
| New York | New York City Department of Finance (ACRIS) | 1,012 | 73,045 |
How the record becomes data
Each recorded deed is extracted, normalized, and reconciled to a specific building and unit, so a sale is attributed to the right address and the right unit — the basis for resale chains, hold periods and price-per-square-foot. Nominal, non-arm’s-length and duplicate transfers are classified and separated from market sales, so a $1 family transfer never skews a median. Figures refresh on CURVE’s ingest cadence as new deeds are recorded.
What CURVE does not do
CURVE does not publish automated valuations, asking prices, or listing estimates. Every price is a price a unit actually recorded at. That is the difference between a registry-verified sale and an estimate — and why CURVE can answer questions listing sites structurally cannot, like the most expensive building in a neighborhood by recorded sale price.
Explore the record
Open any building for its full sale history, or start a free trial for every recorded sale, resale chain and analytic across the market.
Browse condo data