Sonoma County property record for 440 Mountain Ave, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1.5 ba · 968 sqft · built 1915 |
| Lot Size | 0.273 acres (11,907 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $64,500 (Feb 2018) |
| Tax Bill | $2,844 (2025) |
| Deeds & Mortgages | Feb 2018 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-282-052-000 |
| Primary APN | 056-282-052-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 2 Rooms |
| Stories | 1 Story |
| Building Area | 968 sqft Living Area |
| 1st Floor Area | 968 sqft |
| Year Built | Built 1915 |
|---|---|
| Effective Year Built | Effective 1926 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 11,907 sqft (0.273 acres) |
| Garage Type | Carport |
| Garage Area | 240 sqft |
| Carport | Carport |
| Carport Area | 240 sqft |
| Parking Spaces | 1 Parking Space |
| Old Parcel Number | 056-282-052 |
|---|---|
| Street Address | 440 MOUNTAIN AVE |
| City | SONOMA |
| State | CA |
| Zip | 95476-3443 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R15UA |
| Legal Description | 91 FM 56-282-11 & PT 53 & RD PM 88-839 |
| Legal Subdivision | PARCEL MAP NO 88-839 |
| Legal Block | 2 |
| Legal Lot Number | 1 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 2 |
| Census Block | 2004 |
| 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 | 440 MOUNTAIN AVE, SONOMA, CA 95476-3443 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 9, 2018 · Amount on Record |
| Deed Sale | Feb 9, 2018 · Amount on Record |
| Deed Document Number | 20189247 |
| Prior Transfer Date | Feb 2, 2018 |
| Prior Transfer Doc | 0000009247 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Feb 9, 2018 |
| Property Address | 440 MOUNTAIN AVE, SONOMA, CA 95476-3443 |
| Document Number | 0000009247 |
| Map Reference | MB471 PG48&49 |
| Instrument Date | Feb 2, 2018 |
| Instrument | 2018009247 |
| Transaction Type | Transfer |
| Record Updated | Aug 19, 2021 |
| Title Company | ADVANTAGE TITLE LLC |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 00000 |
| Name | Verified Name |
|---|---|
| Address | 440 MOUNTAIN AVE, SONOMA, CA 95476-3443 |
| Document Number | 0000009248 |
|---|---|
| Date | Feb 9, 2018 |
| Instrument | 2018009248 |
| Name | CARDINAL FINANCIAL COMPANY LP |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Mar 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 | $105,877 (+2%) Land $42,494 Building $63,383 | |
| 2025 | $2,844.00 (+8.88%) | $103,802 (+4.04%) Land $41,661 Building $62,141 |
| 2023 | $2,612.00 (+3.73%) | $99,774 Land $40,045 Building $59,729 |
| 2022 | $2,518.00 |
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 | Moderate above 51% of the US · lower than 69% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Direct burnable vegetation |
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 343 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| T-Mobile Fixed Wireless | 100 / 20 |
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