ParcelioSan Mateo County, California: parcel data and property records
225,059 San Mateo County parcels on one searchable map: owner of record and mailing address, assessed and appraised values and recorded sales, plus lot boundaries and location. Screen by absentee ownership, acreage, year built and owner tenure.
What the data covers
These bars show real field-by-field coverage for San Mateo County in our database, so you know exactly what you are getting before you search. Numbers refresh as the county publishes new records.
Not held for San Mateo County: vacancy. Those fields are carried where the county publishes them.
Most recent recorded sale on file: 2026-09-25.
Areas covered
Parcel counts by place, largest first: San Mateo (30,317), Daly City (25,469), Redwood City (24,461), South San Francisco (18,064), Menlo Park (12,907).
Recent sales
1,000 San Mateo County parcels have a recorded sale dated since November 2025. Across 700 priced sales, with a deed recorded on several parcels counted once, the median price was $2,250,000 and the middle half sold between $1,340,000 and $3,736,000.
Land use mix
The most common land use or property class on file, as the county writes it, by share of parcels with one: Low Density Residential 38%, Residential Low Density 25%, Residential Medium Density 11%, High Density Residential 9%, Residential Conservation 2%.
Nearest counties
- San Francisco County: about 26 mi away, 227,549 parcels
- Alameda County: about 28 mi away, 471,262 parcels
- Santa Cruz County: about 30 mi away, 99,624 parcels
- Santa Clara County: about 36 mi away, 536,950 parcels
- Contra Costa County: about 39 mi away, 398,460 parcels
Search San Mateo County parcels
The map is free to browse - parcel lines, boundaries, and location. Owner of record, assessed values, recorded sales, year built and the full parcel report come with a plan that costs less than one hour of a title runner's time.
Explore the San Mateo County map See plans
Common questions
How many parcels are in San Mateo County, California?
Parcelio carries 225,059 parcel records for San Mateo County, California, with owner information on 46 percent of them.
Can I find out who owns a property in San Mateo County?
Yes. Search by owner name, address, or parcel number to pull the record: owner of record and mailing address, assessed values, recorded sales, year built and lot lines on the map. Sale records here currently run through 2026-09-25.
How do I find vacant land or absentee owners in San Mateo County?
We do not hold vacancy data for San Mateo County yet, so this filter has nothing to match there. Vacancy filters work in the counties where we hold the field. San Mateo County does have owner mailing state: 2,691 parcels have an owner mailing address outside California.
Can I search San Mateo County by lot size or acreage?
Yes. Acreage is on 93 percent of San Mateo County parcels, mapped from the parcel boundary, and the advanced search filters on it directly - set a minimum and maximum to pull every tract in that range, then stack vacancy or absentee ownership on top.