21073 River Blvd, Monte Rio, CA 95462 Property Records

Sonoma County property record for 21073 River Blvd, Monte Rio, CA 95462

Property Summary

Property Type	Duplex
Details	4 bd · 2 ba · 1,782 sqft · built 1946
Lot Size	0.126 acres (5,500 sqft)
Owner	Individual Name on Record
Last Sale	$370,000 (Nov 2024)
Tax Bill	$4,864 (2025)
Deeds & Mortgages	Jan 2020 Transfer
Flood Zone	Zone AE (high risk)
APN	`095-170-016-000`

Property Details

APN / Parcel Number

Primary APN	`095-170-016-000`
Alternative APN	`095-170-016`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Units	2 Units
Stories	1 Story
Building Area	1,782 sqft Living Area
Gross Area	2,607 sqft
1st Floor Area	1,782 sqft

Exterior

Year Built	Built 1946
Effective Year Built	Effective 1990
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	5,500 sqft (0.126 acres)
Garage Type	Attached
Garage Area	825 sqft
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	None
Heating System	Floor/Wall Furnace

Location & Zoning

Old Parcel Number	095-170-016
Street Address	21073 RIVER BLVD
City	MONTE RIO
State	CA
Zip	95462-9601
Property Category	Residential
Property Type	Residential > Multi-Unit > Duplex
Legal Description	UNINCORP COUNTY CA
Legal Subdivision	EAST MONTE RIO
Legal Block	3
Jurisdiction	SONOMA CA
Township / Civil Division	RUSSIAN RIVER-SONOMA COAST
Census Block Group	3
Census Block	3005
Census Tract	153708

Owner

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	Individual Name on Record
Mailing Address	330 VERNON ST, SAN FRANCISCO, CA 94132-2714
Owner Type	Individual
Vesting	Unmarried Woman

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Nov 27, 2024 · Amount on Record
Deed Sale	Nov 27, 2024 · Amount on Record
Prior Sale	Nov 17, 2009 · Amount on Record
Deed Document Number	202458935
Prior Transfer Date	Apr 22, 2009
Prior Transfer Doc	0000038283
Record Updated	Oct 29, 2026

January 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SONOMA CA
Recording Date	Jan 3, 2020
Property Address	21073 RIVER BLVD, MONTE RIO, CA 95462-9601
Document Number	0000000573
Instrument Date	Jan 2, 2020
Instrument	573
Transaction Type	Transfer
Record Updated	Jan 28, 2020
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	PO BOX 405 GUERNEVILLE CA 954460405, GUERNEVILLE, CA 95446-0405

Tax Assessment & Valuation

Source: Sonoma County assessment roll, as of September 1, 2026

Property Jurisdictions

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)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$377,400 (+2%) Land $122,400 Building $255,000
2025	$4,864.00 (+46.24%)	$370,000 (+59.48%) Land $120,000 Building $250,000
2023	$3,326.00 (+1.68%) Homeowner's exemption	$232,000 Land $99,251 Building $132,749
2022	$3,271.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective February 15, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone AE high risk
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	Varies along the reach; see FIRM
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on Record 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	Severe Winter Storms, Flooding, Landslides, And Mudslides, Feb 2019 · 24 claims Severe Winter Storms, Flooding, And Mudslides, Jan 2017 · 3 claims Severe Storms, Flooding, Mudslides, And Landslides, Dec 2005 · 5 claims

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

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Moderate above 40% of the US · lower than 76% of California
Wildfire Likelihood	0.06% 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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

Source: FCC Broadband Data Collection, based on 195 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