Sonoma County property record for 307 Mountain Ave, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 1 bd · 1.5 ba · 770 sqft · built 1916 |
| Lot Size | 0.138 acres (6,000 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $537,000 (Dec 2017) |
| Tax Bill | $7,476 (2025) |
| Deeds & Mortgages | Dec 2017 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-271-052-000 |
| Primary APN | 056-271-052-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 1 Bed |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 2 Rooms |
| Stories | 2 Stories |
| Building Area | 770 sqft Living Area |
| Gross Area | 940 sqft |
| Year Built | Built 1916 |
|---|---|
| Effective Year Built | Effective 1977 |
| Architectural Style | L-Shape |
| Lot Area | 6,000 sqft (0.138 acres) |
| Garage Type | Attached |
| Garage Area | 170 sqft |
| Old Parcel Number | 056-271-052 |
|---|---|
| Street Address | 307 MOUNTAIN AVE |
| City | SONOMA |
| State | CA |
| Zip | 95476-3442 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | 96 FM 56-271-02 OR 95072827 LT 5 BLK 1 |
| Legal Subdivision | SUBDIVISION #2 OF AGUA CALIENTE PARK |
| Legal Block | 1 |
| Legal Lot Number | 5 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 3 |
| Census Block | 3014 |
| Census Tract | 150306 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | PO BOX 1652, ROSS, CA 94957-1652 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 6, 2017 · Amount on Record |
| Deed Sale | Dec 6, 2017 · Amount on Record |
| Prior Sale | Oct 31, 2014 · Amount on Record |
| Deed Document Number | 201793691 |
| Prior Transfer Date | Nov 30, 2017 |
| Prior Transfer Doc | 0000093691 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Dec 6, 2017 |
| Property Address | 307 MOUNTAIN AVE, SONOMA, CA 95476-3442 |
| Document Number | 0000093691 |
| Map Reference | MAP23 PG21 |
| Instrument Date | Nov 30, 2017 |
| Instrument | 2017093691 |
| Transaction Type | Transfer |
| Record Updated | Jul 25, 2022 |
| Title Company | FIRST AMERICAN TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | PO BOX 1652, ROSS, CA 94957-1652 |
| Document Number | 0000093692 |
|---|---|
| Date | Dec 6, 2017 |
| Instrument | 2017093692 |
| Name | FRANKLIN AMERICAN MORTGAGE CO |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jan 1, 2048 |
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 | $507,752 (+2%) Land $300,227 Building $207,525 | |
| 2025 | $7,476.00 (+5.41%) Homeowner's exemption | $497,797 (+4.04%) Land $294,341 Building $203,456 |
| 2023 | $7,092.00 (+2.31%) Homeowner's exemption | $478,468 Land $282,912 Building $195,556 |
| 2022 | $6,932.00 |
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 · 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.
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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