Sonoma County property record for 310 Mountain Ave, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,306 sqft · built 1920 |
| Lot Size | 0.16 acres (6,970 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $647,500 (May 2018) |
| Tax Bill | $9,885 (2025) |
| Deeds & Mortgages | Oct 2023 Transfer Jan 2021 Mortgage + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-321-022-000 |
| Primary APN | 056-321-022-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 5 Rooms |
| Stories | 2 Stories |
| Building Area | 2,306 sqft Living Area |
| 1st Floor Area | 1,468 sqft |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1986 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,970 sqft (0.16 acres) |
| Garage Area | 240 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | Central |
| Old Parcel Number | 056-321-022 |
|---|---|
| Street Address | 310 MOUNTAIN AVE |
| City | SONOMA |
| State | CA |
| Zip | 95476-3463 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R15UA |
| Legal Description | LOT 11 BLK 4 AGUA CALIENTE PARK |
| Legal Subdivision | AGUA CALIENTE PARK |
| Legal Block | 4 |
| Legal Lot Number | 11 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 150306 |
310 Mountain Ave is owned and occupied by two individuals who bought it in May 2018.
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 | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Oct 19, 2023 | Transfer on Death Deed, Transfer |
| Jan 5, 2021 | Deed of Trust, Mortgage · Conventional Mortgage US BANK NA |
| May 14, 2018 | Grant Deed, Transfer · Conventional Mortgage US BANK NA |
| May 14, 2018 | Quit Claim Deed, Transfer FIDELITY NATIONAL TITLE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 14, 2018 · Amount on File |
| Deed Sale | May 14, 2018 · Amount on File |
| Deed Document Number | 201834797 |
| Prior Transfer Date | Jun 9, 2008 |
| Prior Transfer Doc | 0000061078 |
| Record Updated | Oct 29, 2026 |
| Document Type | Transfer on Death Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Oct 19, 2023 |
| Property Address | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Document Number | 0000048840 |
| Map Reference | LB 23 PG 21 |
| Instrument Date | Oct 10, 2023 |
| Instrument | 2023048840 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 17267 BUENA VISTA AVE, SONOMA, CA 95476-3492 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SONOMA CA |
| Property Address | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | FIDELITY NATIONAL TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Document Number | 0000000690 |
|---|---|
| Date | Jan 5, 2021 |
| Instrument | 2021000690 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Address | OWENSBORO, KY 42301 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Feb 1, 2051 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | May 14, 2018 |
| Property Address | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Document Number | 0000034797 |
| Map Reference | LB23 PG21 |
| Instrument Date | May 9, 2018 |
| Instrument | 2018034797 |
| Transaction Type | Transfer |
| Record Updated | Aug 19, 2021 |
| Title Company | FIDELITY NATIONAL TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 00000 |
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Document Number | 0000034798 |
|---|---|
| Date | May 14, 2018 |
| Instrument | 2018034798 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jun 1, 2048 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | May 14, 2018 |
| Property Address | 310 MOUNTAIN AVE, SONOMA, CA 95476-3463 |
| Document Number | 0000034796 |
| Instrument Date | May 9, 2018 |
| Instrument | 34796 |
| Transaction Type | Transfer |
| Record Updated | Jun 1, 2018 |
| Title Company | FIDELITY NATIONAL TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | PO BOX 5313 INCLINE VILLAGE NV 894505313, INCLINE VILLAGE, NV 89450-5313 |
The 2025 property tax bill for 310 Mountain Ave was $9,885 with a homeowner's exemption.
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Unified School District | Sonoma Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $751,473 (+2%) Land $330,763 Building $420,710 | |
| 2025 | $9,885.00 Homeowner's exemption | $736,739 Land $324,278 Building $412,461 |
| 2023 | $9,481.00 (+0.15%) Homeowner's exemption | $708,133 Land $311,687 Building $396,446 |
| 2022 | $9,467.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 310 Mountain Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective February 15, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 2 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 310 Mountain Ave is low, with a 0.04% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 66% of the US · lower than 80% of California |
|---|---|
| Wildfire Likelihood | 0.04% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | VALLEY OF THE MOON WATER DISTRICT serves 23,140 people · EPA ID CA4910013 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Sep 2022 |
| 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 444 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 · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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