Sonoma County property record for 21425 Main St, Monte Rio, CA 95462
| Property Type | Single Family Home |
|---|---|
| Details | 1 bd · 1 ba · 587 sqft · built 1910 |
| Lot Size | 0.074 acres (3,240 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $80,000 (Jul 2012) |
| Tax Bill | $1,746 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 095-139-002-000 |
| Primary APN | 095-139-002-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 1 Bed |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 1 Room |
| Stories | 1 Story |
| Building Area | 587 sqft Living Area |
| 1st Floor Area | 587 sqft |
| Basement Area | 318 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 3,240 sqft (0.074 acres) |
| Cooling System | Central |
|---|
| Old Parcel Number | 095-139-002 |
|---|---|
| Street Address | 21425 MAIN ST |
| City | UNINCORP COUNTY |
| State | CA |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RR1 |
| Legal Description | LOT 1 |
| Legal Subdivision | MONTE RIO PARK |
| Legal Block | 3 |
| Legal Lot Number | 1 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | RUSSIAN RIVER-SONOMA COAST |
| Census Block Group | 3 |
| Census Block | 3011 |
| Census Tract | 153708 |
21425 Main St is owned by two individuals who bought it in July 2012.
Source: Sonoma County records, as of September 1, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 136 TULARE ST, BRISBANE, CA 94005-1745 |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 9, 2012 · Amount on File |
| Deed Sale | Jul 9, 2012 · Amount on File |
| Prior Sale | Apr 24, 1998 · Amount on File |
| Deed Document Number | 201264535 |
| Prior Transfer Date | Feb 28, 1996 |
| Prior Transfer Doc | 0000017643 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 21425 Main St was $1,746.
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Secondary School District | West Sonoma County Union High School District (09 - 12) |
| Elementary School District | Monte Rio Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $100,471 (+2%) Land $43,954 Building $56,517 | |
| 2025 | $1,746.00 | $98,502 Land $43,093 Building $55,409 |
| 2023 | $1,665.00 (+1.96%) | $94,679 Land $41,421 Building $53,258 |
| 2022 | $1,633.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 21425 Main St in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 64 policies |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 64 in force |
| Nearby Flood Claims | 47 (1995–2025) |
| Most Recent Claim | Feb 2025 · river or lake flooding |
| Claims by Event |
|
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 21425 Main St is moderate, ranking above 44% of the US, with a 0.07% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 44% of the US · lower than 74% of California |
|---|---|
| Wildfire Likelihood | 0.07% 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 | SWEETWATER SPRINGS CWD - MONTE RIO serves 3,531 people · EPA ID CA4910028 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Oct 2021 |
| Lead | Under 1 ppb (2023–2025) 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 101 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 1,200 / 35 |
| Verizon Fixed Wireless | 300 / 20 |
5G and 4G LTE (outdoors only)
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