20 Walnut Ave, Mill Valley, CA 94941 Property Records

Marin County property record for 20 Walnut Ave, Mill Valley, CA 94941 · Last verified August 2026

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,486 sqft · built 1909
Lot Size	0.241 acres (10,500 sqft)
Owner	2 Individual Names on File
Last Sale	$4,100,000 (Oct 2023)
Tax Bill	$51,679 (2025)
Deeds & Mortgages	Oct 2023 Sale & Mortgage Jan 2022 Transfer
Flood Zone	Zone X (minimal risk)
APN	`028-032-05`

Property Details

APN / Parcel Number

Primary APN	`028-032-05`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	2,486 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1909
Effective Year Built	Effective 1974
Architectural Style	Contemporary
Lot Area	10,500 sqft (0.241 acres)
Garage Area	240 sqft
Parking Spaces	1 Parking Space
Deck Area	600 sqft

Utilities, Heating & Cooling

Heating System	Floor/Wall Furnace

Location & Zoning

Street Address	20 WALNUT AVE
City	MILL VALLEY
State	CA
Zip	94941-2706
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	OFFICIAL RECS 2 PG 55 PART OF LOT 258,260
Legal Subdivision	TAMALPAIS PARK
Legal Lot Number	258
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	3
Census Block	3003
Census Tract	126100

Owner

Source: Marin County records · APN 028-032-05

Assessment roll updated July 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	2 Individual Names on File
Mailing Address	20 WALNUT AVE, MILL VALLEY, CA 94941-2706
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Date	Document
Oct 24, 2023	Grant Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA
Jan 27, 2022	Intrafamily Transfer, Transfer FIRST AMERICAN TITLE COMPANY

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Oct 24, 2023 · Amount on Record
Deed Sale	Oct 24, 2023 · Amount on Record
Prior Sale	Apr 15, 2004 · Amount on Record
Deed Document Number	202328264
Prior Transfer Date	Jan 24, 2022
Prior Transfer Doc	0000003369
Record Updated	Sep 20, 2026

October 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Oct 24, 2023
Property Address	20 WALNUT AVE, MILL VALLEY, CA 94941-2706
Document Number	0000028264
Map Reference	MB 2 PG 55
Instrument Date	Oct 20, 2023
Instrument	2023-0028264
Transaction Type	Transfer
Record Updated	Nov 08, 2023
Title Company	FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$4,510.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	20 WALNUT AVE, MILL VALLEY, CA 94941-2706

Mortgage

Document Number	0000028265
Date	Oct 24, 2023
Instrument	2023-0028265

Lender

Name	WELLS FARGO BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 01, 2053

January 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Jan 27, 2022
Property Address	20 WALNUT AVE, MILL VALLEY, CA 94941-2706
Document Number	0000003369
Map Reference	MB 2 PG 55
Instrument Date	Jan 24, 2022
Instrument	2022-0003369
Transaction Type	Transfer
Record Updated	Jun 07, 2023
Title Company	FIRST AMERICAN TITLE COMPANY

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
Address	40 BAYWOOD CIR, NOVATO, CA 94949-5815

Tax Assessment & Valuation

Source: Marin County records · Assessment roll updated July 13, 2026 · Last verified August 2026

Property Jurisdictions

Type	Name
State	California
County	Marin County
Municipality	Mill Valley City
Elementary School District	Mill Valley Elementary School District (KG - 08)
Secondary School District	Tamalpais Union High School District (09 - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Year	Tax Bill	Assessed Value
2026		$4,565,640 (+7.63%) Land $2,548,980 Building $2,016,660
2025	$51,679.00 (+97.17%)	$4,242,000 (+151.04%) Land $2,499,000 Building $1,743,000
2023	$26,211.00 (+19.51%)	$1,689,777 Land $1,024,882 Building $664,895
2022	$21,932.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Marin County (06041C), updated October 18, 2023 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060411261003, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Minimal
500-Year Floodplain	No
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Cost	Premium on Record median of 61 individual NFIP policies nearby
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	69 units insured 8 under condo master policies
Nearby Flood Claims	43 (1979–2024)
Claims Outside the SFHA	6 of 43
Most Recent Claim	Dec 2024, river or lake flooding
Claims By Storm	Severe Storms, Flooding, Mudslides, And Landslides, Jan 2006 · 13 claims Severe Storms & Flooding, Feb 1986 · 3 claims Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 9 claims

Wildfire

Wildfire Risk	Low above 20% of the US · above 11% of California
Wildfire Likelihood	About 1 in 10,000 per year
Exposure	Indirect within ember reach

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, availability as of December 31, 2025 · Published October 2026 · based on 762 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
AT&T	Fiber	5,000 / 5,000
Xfinity	Cable	2,000 / 250
Unwired	Fixed Wireless	300 / 25
Verizon	Fixed Wireless	300 / 20
T-Mobile USA	Fixed Wireless	100 / 20

May also be available at this address: AT&T. Availability varies by address; speeds are provider-advertised maximums, not measured.

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