66 Mountain Ave, Sonoma, CA 95476 Property Records

Sonoma County property record for 66 Mountain Ave, Sonoma, CA 95476

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 996 sqft · built 1952
Lot Size	0.248 acres (10,792 sqft)
Owner	2 Individual Names on Record
Last Sale	$255,000 (Oct 2009)
Tax Bill	$5,423 (2025)
Deeds & Mortgages	Nov 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`056-321-033-000`

Property Details

APN / Parcel Number

Primary APN	`056-321-033-000`
Alternative APN	`056-321-033`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	2 Rooms
Stories	1 Story
Building Area	996 sqft Living Area
1st Floor Area	996 sqft

Exterior

Year Built	Built 1952
Effective Year Built	Effective 1959
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	10,792 sqft (0.248 acres)
Garage Type	Detached
Garage Area	312 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	HVAC

Location & Zoning

Old Parcel Number	056-321-033
Street Address	66 MOUNTAIN AVE
City	SONOMA
State	CA
Zip	95476-3437
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R15UA
Legal Description	1973 FORM 56-321-06 C/W 27 BY MAP DEPT
Legal Subdivision	SUBDIVISION #1 OF AQUA CALIENTE PARK
Legal Block	2
Legal Lot Number	6
Jurisdiction	SONOMA CA
Township / Civil Division	SONOMA
Census Block Group	2
Census Block	2003
Census Tract	150306

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	2 Individual Names on Record
Mailing Address	66 MOUNTAIN AVE, SONOMA, CA 95476-3437
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 16, 2009 · Amount on Record
Deed Sale	Oct 16, 2009 · Amount on Record
Deed Document Number	200999639
Last Transfer Date	Oct 14, 2020
Transfer Doc	0000102386
Record Updated	Oct 29, 2026

November 2020: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SONOMA CA
Recording Date	Nov 3, 2020
Property Address	66 MOUNTAIN AVE, SONOMA, CA 95476-3437
Document Number	0000102386
Instrument Date	Oct 14, 2020
Instrument	2020102386
Transaction Type	Transfer
Record Updated	Aug 19, 2021
Title Company	STEWART TITLE OF CALIFORNIA

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	Joint Tenants
Address	66 MOUNTAIN AVE, SONOMA, CA 95476-3437

Mortgage

Document Number	0000102387
Date	Nov 3, 2020
Instrument	2020102387

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	121 Months
Due	Dec 1, 2030

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Sonoma County
Unified School District	Sonoma Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$335,722 (+2%) Land $171,152 Building $164,570
2025	$5,423.00 (-4.84%)	$329,141 (+4.04%) Land $167,797 Building $161,344
2023	$5,699.00 (+6.78%)	$316,362 Land $161,282 Building $155,080
2022	$5,337.00

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 X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 10 (0% premium discount)
Nearby Flood Policies	2 in force

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	Low lower than 65% of the US · lower than 79% of California
Wildfire Likelihood	0.04% annual chance
Exposure	Indirect within 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	VALLEY OF THE MOON WATER DISTRICT serves 23,140 people · EPA ID CA4910013
Water Source	Groundwater
Last State Inspection	Sep 2022
Lead	Under 1 ppb (2024–2026) 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 444 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20
AT&T DSL · Fiber, Fixed Wireless in parts of the area	100 / 20