Search San Mateo County, CA Property Records

In San Mateo County, California, property records are maintained at both the county and city or town level. County offices typically house official records, including deeds, liens, assessments, and tax information. Meanwhile, individual cities or towns may manage permits, zoning details, and local property histories.

Public property records provide legal clarity. Homeowners use them to verify ownership, taxes, and improvements, while buyers rely on them to research property history and confirm valuations.

Local market and economic factors also show why property data is valuable. San Mateo County reports a $1,429,950.00 median home value and a typical rent of $2,757.00. Households earn a median income of $161,446.50, while property owners commonly face a 0.57% in real estate taxes.

In San Mateo County, CA, the main avenues for retrieving property information include instantaneous digital lookups and traditional research.

For most users, the Assessor-County Clerk-Recorder (ACRE) Online Services is the primary gateway. Researchers can use the Grantor/Grantee Search in particular for property data. PropertyChecker can also centralize ownership history, neighborhood statistics, and key property details for a single, more efficient search.

Those requiring certified copies or historical records can visit the county offices. The offices may accept formal requests via standard mail and email. Having the full property address, the 9-digit Assessor’s Parcel Number (APN), or the grantor and grantee names can speed up a search.

While most information is accessible, sensitive data are generally redacted from public view. Additionally, certain documents remain restricted from remote public access.

The following sections explain how to navigate these resources to find specific property data.

Property Ownership and Title Information

The most direct digital route for records that confirm property ownership and title information in San Mateo County is the Grantor/Grantee Search. It allows users to search documents recorded from 1985 to the present.

For records recorded before 1985 or when certified copies are needed, searches may still rely on the index but typically require a document number or exact recording date. In cases where online access is limited, an in-person visit to the County Clerk-Recorder may be necessary, where public search assistance is generally provided at no charge.

Property Sales and Transaction History

The Assessor’s Office maintains the official local assessment roll. Researchers can use the Assessor’s Property Tax Look-up to find specific sales data, including transfer dates and sales prices. Property appraisers refer to the figures provided by the office during valuations or assessment appeals. While the tax portal provides high-level assessment data, the Grantor/Grantee Search is the official source for locating the actual transfer document.

To simplify this process, PropertyChecker consolidates both datasets into a single property report. It pulls assessment figures from the tax look-up and legal details from grantor/grantee records. This eliminates the need to navigate multiple portals to review relevant sales information.

Property Tax Assessment and Payment Records

Property owners can easily view their tax bills, payment history, and any outstanding delinquencies through the San Mateo County Secured Property Tax Search. The portal, offered by the county’s Treasurer-Tax Collector, allows APN and address searches. If an owner feels their assessment is too high, they can navigate the formal appeal process through the Assessment Appeals Board. These applications are typically accepted between July 2 and November 30.

Property Characteristics and Parcel Details

A property parcel search via the San Mateo County Secured Property Tax Search provides a snapshot of the home’s “bones.” The details, when available, can include square footage, the number of bedrooms and bathrooms, the year it was built, and the total lot size. For those who need a more spatial perspective, the San Mateo County Property Maps Portal is the go-to resource. It allows users to view parcel boundaries layered over aerial imagery for evaluating the surrounding land.

Zoning, Land Use, and Planning Records

The Planning and Building Department can help enlighten residents on what can be built or changed on a property in the county. For those looking into unincorporated areas, the Planning GIS Map Viewer is essential. By entering a 9-digit Assessor’s Parcel Number (APN), users can pull up interactive layers showing everything from zoning districts and flood zones to scenic corridors. For properties tucked inside city limits, relevant records are held by the local city planning division instead.

Legal Documents Affecting Property

Legal instruments that can impact the title and usage of a property in San Mateo County are housed with the County Clerk-Recorder. The most common documents include mechanics liens, deeds of trust, notices of default, and court judgments.

While the Clerk-Recorder handles recorded liens and transfers, the San Mateo County Superior Court handles litigation-related records, such as lis pendens or civil judgments that cloud a title. Basic case information and indexes are available through the San Mateo County Superior Court Records Index.

Building Permits, Inspections, and Construction Records

For properties in unincorporated areas, the San Mateo County Online Permit Center is the primary resource for permits and inspection records dating back to 1990. Users can search these archives by address or parcel number to see status updates on electrical, plumbing, or structural projects.

Records pertaining to properties within city limits are managed by the city government.

Obtaining detailed building plans or original blue-line drawings involves more stringent requirements. Under California law, individuals can typically view official plans in person. However, obtaining physical copies generally requires written authorization from both the current property owner and the licensed design professional.

A formal Public Records Act (PRA) Request can be filed with the county or the relevant city office.

Maps and Visual Property Data

The San Mateo County Property Maps Portal allows downloads of Assessor’s Parcel Maps and recorded subdivision maps for nearly 235,000 parcels. They provide a technical layout of a property’s boundaries, often including specific land area measurements and dimensions.

For a more interactive experience, the San Mateo County Planning and Building Viewer allows individuals to layer parcel outlines over high-resolution aerial imagery. Doing so helps users see how a lot fits within its broader surroundings.

The Property Maps Portal is the tool used to access parcel maps in San Mateo County. It is available at gis.smcgov.org and provides access to county land layers and scanned parcel map documents maintained by various county offices, such as the Assessor's Office.

When the portal loads, a disclaimer screen will appear. Click "Agree" to enter the map. The left panel provides links to Search Parcels by Address and Search Parcels by APN.

Scanned drawings and map documents can also be viewed or downloaded, including Engineering Drawings, Assessment District Maps, Corner Records, Parcel Maps, Records of Survey, and Subdivision Maps.

The toolbar banner at the top right includes measurement tools and drawing and annotation capabilities.

Displayed here are charts summarizing the county's tax rates, accompanied by insights into median home values, income figures, and rent rates.

Median Rent

$2,757.00

California	$1,260.00
National	$840.25

• +118.8 %
  vs California
• +228.1 %
  vs National

Median Home Value

$1,429,950.00

California	$403,775.00
National	$173,750.00

• +254.1 %
  vs California
• +723.0 %
  vs National

Median Household Income

$161,446.50

California	$78,109.75
National	$65,108.00

• +106.7 %
  vs California
• +148.0 %
  vs National

Median Property Tax Rate

0.57%

California	0.69%
National	0.74%

• -17.4%
  vs California
• -23.0 %
  vs National

Unemployment Rate

2.99%

California	3.72%
National	2.87%

• -19.6 %
  vs California
• +4.2 %
  vs National

Renter Occupied Housing

37.06%

California	33.49%
National	21.81%

• +10.7 %
  vs California
• +69.9 %
  vs National

The role typically associated with a registrar of deeds is managed by the San Mateo County Assessor-County Clerk-Recorder (ACRE). It serves as the official archive for all documents affecting real property within the county. Key documents maintained here include grant deeds, mortgages, liens, easements, and court decrees.

Because these records establish the legal “chain of title,” they directly influence the work of other county departments. For example, once a deed is recorded, the Assessor uses that information to update the property’s assessment roll and tax obligations. Meanwhile, easements and subdivision maps dictate zoning and land use parameters.

While ACRE Online Services is widely used, the county allows in-person, mail, and email requests or queries for those seeking property information. The fee schedule for these services is standardized by the county. To obtain a non-certified copy of a record, the cost is generally $5 for the first page and $1 for subsequent pages. A full, detailed list of current costs is found on the Official ACRE Fee Schedule.

While the county government handles ownership deeds and tax assessments for the entire region, specific property records are managed at the municipal level. Information includes city-specific zoning ordinances, active building permits, or historical architectural plans.

San Mateo County is composed of 20 incorporated cities and towns, alongside unincorporated communities. They are distributed across the peninsula, and their records can be found through their respective local government portals:

North County: The area includes the communities of Daly City, South San Francisco, Brisbane, Colma, and San Bruno.

Central Peninsula: This central corridor is home to the City of San Mateo, along with Burlingame, Hillsborough, Foster City, Millbrae, Belmont, and San Carlos.

South County: Near the Silicon Valley border, records are managed by Redwood City, Menlo Park, Atherton, East Palo Alto, Woodside, and Portola Valley.

Coastside: For properties along the Pacific, researchers should contact the offices of Pacifica or Half Moon Bay.

Property records can differ significantly across these municipalities. A coastal city like Pacifica may have extensive “geologic hazard” or “coastal zone” records that would not exist for an inland community like Belmont.