Method 1: county assessor parcel search (fastest, free, authoritative)
Every U.S. county publishes a parcel search by address. The result is the legal owner of record — the same name the county mails the property tax bill to. For a single property in a market the investor knows, this is the fastest path from cold address to confirmed owner: under two minutes once the assessor URL is bookmarked.
The two failure modes: the assessor record may be 30 to 90 days out of date after a recent sale, and some counties publish only owner-redacted versions of the parcel record (commonly in California for owner-occupied properties under specific opt-out programs). When the assessor returns "owner-confidential," the deed registry usually has the same information.
The county assessor parcel search is the fastest free method and authoritative for 90%+ of cases.
Method 2: deed registry / recorder of deeds search
The recorder of deeds maintains an index of every recorded property transfer in the county. Searching by property address or parcel number returns the most recent deed, which lists the current grantee — the new owner — directly. This is the only method that's reliable for recent sales: anything that closed in the last 90 days is here before it's in the assessor record.
The downside is interface. Recorder portals are typically older and slower than assessor sites, often require a name spelling match, and rarely have street-address search at the top level. Plan on three to five minutes per lookup. For properties that just sold, that time is worth it because nothing else has the data yet.
