Sonoma County Property Search by Owner, Address & Parcel Number

Search Sonoma County property records by entering an owner name, property address, parcel number, ZIP code, or city. Use advanced filters when you need a more specific match. The property finder can help you review ownership details, parcel characteristics, assessed values, sales information, tax-related data, GIS location details, and other available public-record information in one place.

CA Property Checker

Search California property records by AIN, assessor ID, address, ZIP or city.

Communities
21

Total Parcels

193,500

Median Home Value

$815,500

Data Updated

August 2026

Explore Sonoma County Property Resources

Tax Calculator

Estimate potential property tax costs using property value and applicable local tax information before making financial decisions.

Tax Rate

Review how tax-rate areas and local taxing jurisdictions can affect the property tax bill for a Sonoma County parcel.

Zoning & Maps

Explore geographic information, parcel boundaries, land-use areas, flood information, and other mapping resources connected with local properties.

Transfer Tax Calculator

Estimate documentary transfer tax associated with a qualifying real estate transaction and understand the potential cost before closing.

Sonoma County Assessor Office

The Sonoma County Assessor maintains the annual assessment roll, determines property values for taxation, and handles eligibility for property tax exemptions and exclusions. Deva Marie Proto serves as the County Clerk-Recorder-Assessor-Registrar of Voters. The office also maintains property-related assessment information and supports the county’s public property-record system.

Assessor Services for Property Owners and Researchers

Sonoma County Real Estate Market Trends (2025–2026)

Sonoma County’s real estate market experienced a mix of changes throughout 2025 and 2026, with shifts in home prices, property sales, lending activity, and foreclosure levels influencing the county’s overall housing landscape. Market conditions varied during the period as buyer demand, financing activity, and local property transactions continued to evolve.

Sonoma County Housing Market Trends (2025–2026)

The chart highlights how home prices, lending activity, sales volume, and foreclosure trends shifted across Sonoma County between 2025 and 2026.

Median Home Prices Continued to Reach New Highs

Median sales prices increased from $812,000 in January 2025 to $875,000 in June 2026. Prices then dropped to $762,500 in July 2026, after reaching the period’s highest level.

Buyers Needed Larger Down Payments

Median down payments rose from $162,400 in January 2025 to $175,000 in June 2026. The amount then declined to $152,500 in July 2026, showing a notable monthly decrease.

Home Sales Remained Strong Throughout Spring

Home sales increased from 225 in January 2025 to 395 in June 2025. Sales later reached 406 in May 2026, followed by 355 in June and 382 in July 2026.

Purchase and Refinance Loans Followed Different Trends

Purchase loans climbed from 176 in January 2025 to 308 in June 2025, while REFI loans declined from 92 to 64. By June 2026, purchase loans reached 277 and REFI loans 63.

HELOC Activity Reflected Growing Home Equity

HELOC loans increased from 44 in January 2025 to 72 in June 2025. Activity reached 75 in June 2026, before slightly declining to 72 loans in July 2026.

Foreclosure Filings and Starts Increased Gradually

Foreclosure filings rose steadily from 29 in January 2025 to 76 in July 2026. Foreclosure starts followed the same upward pattern, increasing from 17 to 46 during the period.

Completed Foreclosures Stayed Relatively Low

Completed foreclosures increased from 6 in January 2025 to 20 in July 2026. Despite the gradual increase, monthly completed foreclosures remained comparatively low throughout the period.

How to Use the Sonoma County Property Search Tool

Start with the information you already have rather than trying to identify every detail of a property at once. You can search by owner, street address, APN, ZIP code, or city. When a basic lookup produces too many results, switch to advanced search and combine available filters to narrow the list.

Enter the property owner’s name when you want to locate parcels connected with a particular person or entity. Try the last name first when the search tool supports partial matching, then add additional information if necessary. Name searches can be especially useful for researchers reviewing multiple properties, investors identifying ownership records, or users who know the owner but not the parcel number.

An address is often the easiest starting point when you are researching a known property. Enter the street number and street name, then include the city or ZIP code when the tool allows it. Check spelling and abbreviations if the first search does not produce a result. Once you locate the matching property, review the parcel identifier and other characteristics to confirm you have the correct record.

The parcel number, commonly called an APN or assessor parcel number, provides a more precise way to identify a property. Enter the number as shown in the available record and follow the tool’s formatting requirements. This method is particularly useful for title research, appraisal preparation, property comparisons, tax research, and situations where several properties have similar street addresses.

ZIP-code searching is useful when you want to explore properties across a defined geographic area instead of starting with a specific address. Enter the Sonoma County ZIP code and review the returned properties. Because one ZIP code can contain many parcels, this method works best when combined with another filter such as city, owner, property type, or another available characteristic.

Choose a city when your research is focused on a particular Sonoma County community. This approach can help users compare properties within places such as Santa Rosa, Petaluma, Sonoma, Healdsburg, or Windsor. City searches are also helpful when the exact street address is unknown but you know the general location where a property is situated.

Advanced search is useful when a basic property finder produces too many matches. Combine multiple criteria to create a narrower result set, such as a city with an owner name, address information with a parcel identifier, or location details with property characteristics. For professional research, use the most specific information available and verify important findings against the applicable official county record.

Property Information Available Through the Lookup

A Sonoma County property lookup can bring together several categories of information that help users understand a parcel beyond its street address. The available information can be useful for homeowners, buyers, agents, investors, appraisers, researchers, and others reviewing California property records.

Property Identification

Understand the basic identifiers used to distinguish one Sonoma County property from another.

Property Location

Review location information that helps connect a parcel record with its physical setting.

Building Details

Property characteristics can provide a clearer picture of the structures associated with a parcel.

Assessment & Value

Assessment information helps users understand how a property is represented for taxation purposes.

Tax & Exemptions

Tax-related information can help users investigate the relationship between a parcel and its property-tax obligations.

Classification & Records

Use classification and record information to better understand how a parcel appears in public property datasets.

Communities and Areas Covered in Sonoma County

Sonoma County’s GIS and planning resources identify 21 Urban Service Areas used to define designated limits for urban development and public-service infrastructure in unincorporated communities. The county’s incorporated city boundary layer separately identifies nine incorporated municipalities.

Airport

Bodega Bay

Cloverdale

Cotati

Forestville

Geyserville

Graton

Guerneville

Healdsburg

Larkfield

Monte Rio

Occidental

Penngrove

Petaluma

Rohnert Park

Santa Rosa

Sea Ranch

Sebastopol

Sonoma

Sonoma Valley

Windsor

Counties Bordering or Closely Connected to Sonoma County

Sonoma County has five direct neighboring counties by land: Mendocino, Lake, Napa, Solano, and Marin. Because your page structure calls for six nearby counties, Contra Costa County is included as a nearby North Bay/Bay Area county rather than described as a direct land-bordering county. California’s employment-development region also groups Sonoma with Lake, Marin, Mendocino, Napa, and Solano as the North Bay region.

Sonoma County Property & County Information

Sonoma County combines incorporated cities, rural properties, agricultural land, residential neighborhoods, coastal areas, and extensive GIS resources. The county’s public mapping systems connect parcel information with tax-rate areas, school districts, flood hazards, city boundaries, and other geographic datasets.

Property & County Information	Sonoma County Details
County	Sonoma County
State	California (CA)
County Seat	Santa Rosa
Incorporated Cities	9 Incorporated Municipalities
Population	486,444 Estimated Residents (July 1, 2025)
Total Parcels	Available Through Official Sonoma County Records
Median Home Value	$815,500 for Owner-Occupied Housing Units (2020–2024)
Property Tax Information	Assessment, Tax-Rate Areas, Exemptions & Property Tax Information
Primary Property Types	Residential, Agricultural, Commercial, Multifamily, Vacant Land & Rural Properties
Major Property Uses	Residential Housing, Agriculture, Vineyards, Commercial, Public & Rural Uses
School Districts	Multiple Unified, High School & Elementary School Districts
Time Zone	Pacific Time (PT)
Flood Zone Information	Available Through FEMA Flood Hazard Data and Sonoma County GIS
Property Search Options	Owner Name, Property Address, APN, ZIP Code, City & Advanced Search
Property Records Available	Parcel Details, Assessment Data, Property Characteristics, Tax Information, GIS Data & Recorded Document References
Official Assessor	Deva Marie Proto, County Clerk-Recorder-Assessor-Registrar of Voters
Official Records Source	Sonoma County Clerk-Recorder-Assessor & County GIS Services
Assessment Standard	California Proposition 13 Assessment System
GIS & Parcel Maps	Available Through Official Sonoma County GIS Services
County-Specific Property Feature	Countywide Parcel GIS Layer Updated Monthly Using Official Assessor Parcel Map Information

FAQ's

How can I search Sonoma County property records by owner name?

You can begin with the owner’s name when you do not know the property’s street address or APN. Enter the name into the owner search field and review the matching records. If several properties appear, narrow the results using the city, ZIP code, address, or another available filter. For important legal or financial decisions, confirm the information against the applicable official Sonoma County record.

Can I find a Sonoma County property using an APN?

Yes. An Assessor Parcel Number is one of the most useful identifiers for locating a specific parcel. If you already have the APN from a tax bill, appraisal, deed, listing, or other document, entering it can be more precise than searching by address. Sonoma County’s GIS parcel system uses APNs as unique identifiers within its countywide parcel data.

What information can a Sonoma County property finder show?

Depending on the available record, a property lookup can provide information such as parcel identification, location, property classification, building characteristics, assessed values, tax-related details, sales information, and GIS location data. The exact information associated with a particular parcel can vary. County GIS data may also connect property research with tax-rate areas, school districts, flood information, and other geographic layers.

How is property assessed in Sonoma County?

Sonoma County follows California’s property assessment framework. When a qualifying ownership change occurs, the property is generally reassessed using its current market value as the new base-year value. Under Proposition 13, the factored base-year value generally cannot increase by more than 2% annually, although special rules apply to transfers, new construction, declines in value, and other situations.

Where can I check Sonoma County property tax information?

Property tax information is handled through Sonoma County’s property-tax and assessment systems. The Assessor determines assessed values and applicable exemptions, while the Auditor-Controller-Treasurer-Tax Collector handles tax billing and collection functions. Sonoma County also publishes tax-related open datasets, including defaulted-tax information that was updated July 16, 2026.

Does Sonoma County have GIS property maps?

Yes. Sonoma County maintains several public GIS layers related to property research. Its parcel layer is built from official Assessor Parcel Maps and is published online as a countywide parcel dataset. Other mapping layers cover tax-rate areas, school districts, city boundaries, flood hazards, and additional geographic information. These maps are valuable for research but should not replace a professional survey when exact legal boundaries matter.

How many cities are incorporated in Sonoma County?

Sonoma County has nine incorporated municipalities: Cloverdale, Cotati, Healdsburg, Petaluma, Rohnert Park, Santa Rosa, Sebastopol, Sonoma, and Windsor. The county also contains numerous unincorporated communities and designated Urban Service Areas. This distinction is useful when searching property records because a mailing address or community name does not always correspond directly to an incorporated city boundary.

What is the median home value in Sonoma County?

The U.S. Census Bureau reports a $815,500 median value for owner-occupied housing units for 2020–2024. More recent real-estate platforms publish different measures based on their own methodologies. For example, Redfin reported a May 2026 median sale price of $841,975, while Zillow reported a typical home value of $798,737 through June 30, 2026. These figures should not be treated as interchangeable.

Can I search Sonoma County properties by ZIP code or city?

Yes. Searching by ZIP code can help you explore properties within a defined postal area, while a city search is useful when your research is focused on a particular Sonoma County municipality. Because both methods can return multiple properties, adding an owner name, street address, parcel number, or advanced filter can make the results more precise.

Are Sonoma County GIS parcel boundaries official legal boundaries?

The county’s parcel GIS data is derived from authoritative public records and official Assessor Parcel Maps, but Sonoma County specifically cautions that the GIS parcel layer is intended for general reference and planning. It does not provide survey-quality spatial accuracy and should not be used to establish exact legal boundary lines. For a boundary dispute, transaction, or other legal determination, consult the appropriate official records and a licensed land surveyor.