18946 Upper Ter, Guerneville, CA 95446 Property Records

Sonoma County property record for 18946 Upper Ter, Guerneville, CA 95446

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 728 sqft · built 1950
Lot Size	0.344 acres (15,000 sqft)
Owner	Trust Name on File
Last Sale	$65,000 (Dec 1988)
Tax Bill	$1,937 (2025)
Flood Zone	Zone X (minimal risk)
APN	`094-210-002-000`

Property Details

APN / Parcel Number

Primary APN	`094-210-002-000`
Alternative APN	`094-210-002`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	2 Rooms
Stories	1 Story
Building Area	728 sqft Living Area
1st Floor Area	728 sqft

Exterior

Year Built	Built 1950
Effective Year Built	Effective 1950
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	15,000 sqft (0.344 acres)
Garage Area	432 sqft

Utilities, Heating & Cooling

Cooling System	None

Location & Zoning

Old Parcel Number	094-210-002
Street Address	18946 UPPER TER
City	GUERNEVILLE
State	CA
Zip	95446
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RRD160
Legal Description	MAP 18 PG 26 BLK 61 LOT 6
Legal Subdivision	RUSSIAN RIVER HEIGH
Legal Block	3
Legal Lot Number	6
Jurisdiction	SONOMA CA
Township / Civil Division	RUSSIAN RIVER-SONOMA COAST
Census Block Group	3
Census Block	3024
Census Tract	153707

Owner

18946 Upper Ter is held in a trust since March 2001.

Source: Sonoma County records, as of September 1, 2026

Owner of Record	Trust Name on File
Mailing Address	PO BOX 553, MONTE RIO, CA 95462-0553
Owner Type	Company
Vesting	Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 6, 1988 · Amount on File
Deed Sale	Dec 6, 1988 · Amount on File
Deed Document Number	1988104411
Last Transfer Date	Mar 29, 2001
Transfer Doc	0000041131
Record Updated	Oct 29, 2026

Tax Assessment & Valuation

The 2025 property tax bill for 18946 Upper Ter was $1,937.

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		$124,391 (+2%) Land $47,838 Building $76,553
2025	$1,937.00	$121,952 Land $46,900 Building $75,052
2023	$1,844.00 (+2.05%)	$117,219 Land $45,080 Building $72,139
2022	$1,807.00

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

Flood

FEMA maps place 18946 Upper Ter in Zone X, an area of minimal flood risk, within 500 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 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on File median of 58 policies
Community Rating System	Class 10 (0% premium discount)
Nearby Flood Policies	58 in force
Nearby Flood Claims	32 (1995–2019)
Claims Outside the SFHA	1 of 32
Most Recent Claim	Feb 2019 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Feb 2019 · 21 claims Severe Storms, Flooding, Mudslides, And Landslides, Jan 2006 · 3 claims Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 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

Wildfire risk around 18946 Upper Ter is low, with a 0.05% annual chance of wildfire.

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

Wildfire Risk	Low lower than 62% of the US · lower than 77% of California
Wildfire Likelihood	0.05% annual chance
Exposure	None beyond ember reach

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 114 locations within half a mile, as of December 31, 2025

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