Sonoma County property record for 18488 4th Ave, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,541 sqft · built 1949 |
| Lot Size | 0.132 acres (5,750 sqft) |
| Owner | Company Name on Record |
| Last Sale | $155,000 (Aug 1992) |
| Tax Bill | $5,246 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-471-009-000 |
| Primary APN | 056-471-009-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 3 Rooms |
| Stories | 2 Stories |
| Building Area | 1,541 sqft Living Area |
| 1st Floor Area | 1,057 sqft |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Custom Design |
| Exterior Material | Block |
| Roof Material | Composition Shingle |
| Lot Area | 5,750 sqft (0.132 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Floor/Wall Furnace |
| Sewer | Municipal |
| Water Source | Commercial |
| Old Parcel Number | 056-471-009 |
|---|---|
| Street Address | 18488 4TH AVE |
| City | SONOMA |
| State | CA |
| Zip | 95476-3906 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R15UA |
| Legal Description | MAP 35 PG 7 BLK 7 LOT 6 |
| Legal Subdivision | B BOYES SPGS PA |
| Legal Block | 1 |
| Legal Lot Number | 6 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 1 |
| Census Block | 1020 |
| Census Tract | 150306 |
Source: Sonoma County records, as of September 1, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 18488 4TH AVE, SONOMA, CA 95476-3906 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 17, 1992 · Amount on Record |
| Deed Sale | Aug 17, 1992 · Amount on Record |
| Deed Document Number | 1992100332 |
| Record Updated | Oct 29, 2026 |
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 | $322,343 (+2%) Land $141,461 Building $180,882 | |
| 2025 | $5,246.00 (+3.09%) Homeowner's exemption | $316,024 (+4.04%) Land $138,688 Building $177,336 |
| 2023 | $5,089.00 (+5.32%) Homeowner's exemption | $303,753 Land $133,303 Building $170,450 |
| 2022 | $4,832.00 |
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 |
|---|---|
| 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 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | Indirect within 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 | 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 718 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 |
| Starlink Satellite | 280 / 30 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: T-Mobile.
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