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21850 Duncan Rd, Monte Rio, CA 95462 Property Records

Sonoma County property record for 21850 Duncan Rd, Monte Rio, CA 95462

Property Summary

Property TypeSingle Family Home
Details2 bd · 1 ba · 1,295 sqft · built 1980
Lot Size0.069 acres (3,010 sqft)
OwnerCompany Name on Record
Tax Bill$1,100 (2025)
Deeds & MortgagesFeb 2018 Transfer
Flood ZoneZone X (minimal risk)
APN094-027-003-000

Property Details

APN / Parcel Number

Primary APN094-027-003-000
Alternative APN
  • 094-027-003

Interior

Bedrooms2 Beds
Full Baths1 Bath
Total Rooms2 Rooms
Stories1 Story
Building Area1,295 sqft Living Area
1st Floor Area1,295 sqft
Basement Area194 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1980
Effective Year BuiltEffective 1980
Construction TypeWood
Lot Area3,010 sqft (0.069 acres)

Utilities, Heating & Cooling

Cooling SystemHVAC

Location & Zoning

Old Parcel Number094-027-003
Street Address21850 DUNCAN RD
CityMONTE RIO
StateCA
Zip95462
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeRR1
Legal DescriptionUNINCORP COUNTY CA
Legal SubdivisionSUBDIVISION NO 1 MONTE CRISTO
Legal Block2
JurisdictionSONOMA CA
Township / Civil DivisionRUSSIAN RIVER-SONOMA COAST
Census Block Group2
Census Block2012
Census Tract153707

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 RecordCompany Name on Record
Mailing AddressPO BOX 238, MONTE RIO, CA 95462-0238
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed NamesName on Deed
Last Transfer DateFeb 10, 2018
Transfer Doc0000009852
Record UpdatedOct 29, 2026

February 2018: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSONOMA CA
Recording DateFeb 13, 2018
Property Address21850 DUNCAN RD, MONTE RIO, CA 95462
Document Number0000009852
Instrument DateFeb 10, 2018
Instrument9852
Transaction TypeTransfer
Record UpdatedFeb 27, 2018
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipPersonal Trust
AddressPO BOX 238 MONTE RIO CA 954620238, MONTE RIO, CA 95462-0238

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateCalifornia
CountySonoma County
Secondary School DistrictWest Sonoma County Union High School District (09 - 12)
Elementary School DistrictMonte Rio Union Elementary School District (KG - 08)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$55,479 (+2%) Land $11,760 Building $43,719
2025$1,100.00 (+6.08%) Homeowner's exemption$54,392 (+4.04%) Land $11,530 Building $42,862
2023$1,037.00 (+2.17%) Homeowner's exemption$52,282 Land $11,083 Building $41,199
2022$1,015.00

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 ZoneZone X
minimal risk
Nearest Special Flood Hazard AreaZone AE, within 500 ft
Flood Insurance RequirementNot required
lenders may require it
Flood Insurance CostPremium on Record
median of 30 policies
Community Rating SystemClass 10 (0% premium discount)
Nearby Flood Policies30 in force
Nearby Flood Claims13 (1995–2025)
Most Recent ClaimFeb 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

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 RiskLow
lower than 62% of the US · lower than 77% of California
Wildfire Likelihood0.07% annual chance
ExposureDirect
burnable vegetation

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 SystemSWEETWATER SPRINGS CWD - MONTE RIO
serves 3,531 people · EPA ID CA4910028
Water SourceGroundwater
Last State InspectionOct 2021
LeadUnder 1 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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 49 locations within half a mile, as of December 31, 2025

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

Cell Coverage

5G (outdoors only) and 4G LTE

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