Sonoma County property record for 399 W Sierra Ave, Cotati, CA 94931
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 216 sqft · built 1930 |
| Lot Size | 0.517 acres (22,500 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $769,000 (Apr 2022) |
| Tax Bill | $9,691 (2025) |
| Deeds & Mortgages | Apr 2022 Sale & Mortgage Jun 2019 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 144-340-007-000 |
| Primary APN | 144-340-007-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 216 sqft Living Area |
| 1st Floor Area | 1,229 sqft |
| Year Built | Built 1930 |
|---|---|
| Effective Year Built | Effective 1973 |
| Construction Type | Wood |
| Lot Area | 22,500 sqft (0.517 acres) |
| Garage Type | Attached |
| Garage Area | 400 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | HVAC |
|---|
| Old Parcel Number | 144-340-007 |
|---|---|
| Street Address | 399 W SIERRA AVE |
| City | COTATI |
| State | CA |
| Zip | 94931-4276 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | CITYCO |
| Legal Subdivision | SUBDIVISION #4 COTATI RANCHO |
| Legal Block | 3 |
| Legal Lot Number | 80 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | PETALUMA |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 151204 |
Source: Sonoma County records, as of September 1, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 399 W SIERRA AVE, COTATI, CA 94931-4276 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| Apr 5, 2022 | Grant Deed, Transfer · Conventional Mortgage HOMEXPRESS MORTGAGE CORP |
| Jun 11, 2019 | Intrafamily Transfer, Transfer · Conventional Mortgage FLAGSTAR BANK FSB |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 5, 2022 · Amount on File |
| Deed Sale | Apr 5, 2022 · Amount on File |
| Prior Sale | Oct 30, 2002 · Amount on File |
| Deed Document Number | 202224339 |
| Prior Transfer Date | Jan 28, 1994 |
| Prior Transfer Doc | 0000079066 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Apr 5, 2022 |
| Property Address | 399 W SIERRA AVE, COTATI, CA 94931-4276 |
| Document Number | 0000024339 |
| Map Reference | MB 10 PG 3 |
| Instrument Date | Apr 1, 2022 |
| Instrument | 2022024339 |
| Transaction Type | Transfer |
| Record Updated | Apr 21, 2022 |
| Title Company | FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $845.90 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 399 W SIERRA AVE, COTATI, CA 94931-4276 |
| Document Number | 0000024340 |
|---|---|
| Date | Apr 5, 2022 |
| Instrument | 2022024340 |
| Name | HOMEXPRESS MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Apr 1, 2052 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Jun 11, 2019 |
| Property Address | 399 W SIERRA AVE, COTATI, CA 94931-4276 |
| Document Number | 0000039251 |
| Map Reference | MB 10 PG 3 |
| Instrument Date | Jun 6, 2019 |
| Instrument | 2019039251 |
| Transaction Type | Transfer |
| Record Updated | Aug 19, 2021 |
| Title Company | FIDELITY NATIONAL TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | PO BOX 8397, SANTA ROSA, CA 95407-1397 |
| Document Number | 0000039252 |
|---|---|
| Date | Jun 11, 2019 |
| Instrument | 2019039252 |
| Name | FLAGSTAR BANK FSB |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jul 1, 2049 |
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Municipality | Cotati City |
| Unified School District | Cotati-Rohnert Park Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $832,388 (+2%) Land $432,972 Building $399,416 | |
| 2025 | $9,691.00 (+2.98%) Homeowner's exemption | $816,068 (+4.04%) Land $424,483 Building $391,585 |
| 2023 | $9,411.00 (+64.56%) Homeowner's exemption | $784,380 Land $408,000 Building $376,380 |
| 2022 | $5,719.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective February 15, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 99.2% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CITY OF COTATI serves 7,290 people · EPA ID CA4910016 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Aug 2024 |
| Lead | Under 1 ppb (2024–2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 321 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL | 100 / 20 |
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