21670 Duncan Rd, Monte Rio, CA 95462 Property Records

Sonoma County property record for 21670 Duncan Rd, Monte Rio, CA 95462

Property Summary

Property Type	Single Family Home
Details	1 bd · 1 ba · 478 sqft · built 1951
Lot Size	0.386 acres (16,818 sqft)
Owner	Company Name on File
Last Sale	$202,000 (Oct 2012)
Tax Bill	$3,332 (2025)
Deeds & Mortgages	Oct 2022 Transfer
Flood Zone	Zone X (minimal risk)
APN	`094-052-029-000`

Property Details

APN / Parcel Number

Primary APN	`094-052-029-000`
Alternative APN	`094-052-029`

Interior

Bedrooms	1 Bed
Full Baths	1 Bath
Total Rooms	1 Room
Stories	1 Story
Building Area	478 sqft Living Area
1st Floor Area	478 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1951
Effective Year Built	Effective 1999
Architectural Style	L-Shape
Lot Area	16,818 sqft (0.386 acres)

Location & Zoning

Old Parcel Number	094-052-029
Street Address	21670 DUNCAN RD
City	MONTE RIO
State	CA
Zip	95462
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	2012 FM 094-052-017 & 021 VM 12-0025 COUNTY
Legal Subdivision	MONTE CRISTO SUB #1
Legal Block	2
Legal Lot Number	128
Jurisdiction	SONOMA CA
Township / Civil Division	RUSSIAN RIVER-SONOMA COAST
Census Block Group	2
Census Block	2012
Census Tract	153707

Owner

Source: Sonoma County records · APN 094-052-029-000

Assessment roll updated April 13, 2026 · Last verified August 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 File
Mailing Address	PO BOX 342, MONTE RIO, CA 95462-0342
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Oct 19, 2012 · Amount on Record
Deed Sale	Oct 19, 2012 · Amount on Record
Prior Sale	Mar 18, 2005 · Amount on Record
Deed Document Number	2012104113
Last Transfer Date	Oct 06, 2022
Transfer Doc	0000067776
Record Updated	Sep 20, 2026

October 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SONOMA CA
Recording Date	Oct 25, 2022
Property Address	21670 DUNCAN RD, MONTE RIO, CA 95462
Document Number	0000067776
Map Reference	MB 21 PG 13
Instrument Date	Oct 06, 2022
Instrument	2022067776
Transaction Type	Transfer
Record Updated	Jun 07, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Living Trust
Address	PO BOX 342, MONTE RIO, CA 95462-0342

Tax Assessment & Valuation

Source: Sonoma County records · Assessment roll updated April 13, 2026 · Last verified August 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

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

Year	Tax Bill	Assessed Value
2025	$3,332.00 (+4.48%) Homeowner's exemption	$248,736 (+4.04%) Land $98,509 Building $150,227
2023	$3,189.00 (+2.05%) Homeowner's exemption	$239,080 Land $94,685 Building $144,395
2022	$3,125.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of February 15, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 30 policies
Community Rating System	Class 10 (0% premium discount)
Nearby Flood Policies	30 in force
Nearby Flood Claims	13 (1995–2025)
Most Recent Claim	Feb 2025 · river or lake flooding
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Jan 2023 · 6 claims Severe Storms, Flooding, Mudslides, And Landslides, Dec 2005 · 2 claims

Wildfire

Wildfire Risk	Low lower than 62% of the US · lower than 77% of California
Wildfire Likelihood	0.07% annual chance
Exposure	Direct burnable vegetation at the parcel

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Xfinity Cable	1,200 / 35

Based on FCC filings for 49 locations within half a mile of this property.

Cell Coverage

5G (outdoors only) and 4G LTE

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	SWEETWATER SPRINGS CWD - MONTE RIO serves 3,531 people
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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.