20 Cornwall St, Mill Valley, CA 94941 Property Records

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

Property Summary

Property Type	Single Family Home
Details	3 bd · 4 ba · 3,204 sqft · built 2007
Lot Size	0.315 acres (13,700 sqft)
Owner	2 Company Names on File
Tax Bill	$21,762 (2025)
Deeds & Mortgages	Nov 2023 Transfer Nov 2023 Transfer + 3 more
Flood Zone	Zone X (minimal risk)
APN	`027-211-21`

Property Details

APN / Parcel Number

Primary APN	`027-211-21`

Interior

Bedrooms	3 Beds
Full Baths	4 Baths
Building Area	3,204 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 2007
Effective Year Built	Effective 2007
Lot Area	13,700 sqft (0.315 acres)
Garage Area	521 sqft
Parking Spaces	2 Parking Spaces
Deck Area	992 sqft
Patio Area	992 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	20 CORNWALL ST
City	MILL VALLEY
State	CA
Zip	94941-1731
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	MAP C3 606
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	4
Census Block	4003
Census Tract	127000

Owner

Source: Marin County records · APN 027-211-21

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 Company Names on File
Mailing Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Borrower in Default

Deeds, Mortgages & Sale History

Date	Document
Nov 06, 2023	Intrafamily Transfer, Transfer
Nov 06, 2023	Intrafamily Transfer, Transfer
Feb 07, 2020	Deed of Trust, Mortgage · Conventional Mortgage FIRST REPUBLIC BANK
Sep 01, 2017	Deed of Trust, Mortgage · Line of Credit PATELCO CU
Feb 07, 2020	Deed of Trust, Mortgage · Line of Credit FIRST REPUBLIC BANK

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Transfer Date	May 05, 2023
Transfer Doc	0000029929
Record Updated	Sep 20, 2026

November 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Nov 06, 2023
Property Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731
Document Number	0000029930
Map Reference	MB 5 PG 50
Instrument Date	May 05, 2023
Instrument	2023-0029930
Transaction Type	Transfer
Record Updated	Dec 04, 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 Trust
Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731

November 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Nov 06, 2023
Property Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731
Document Number	0000029929
Map Reference	MB 5 PG 50
Instrument Date	May 05, 2023
Instrument	2023-0029929
Transaction Type	Transfer
Record Updated	Dec 04, 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	Community Property
Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731

February 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731
Transaction Type	Mortgage
Record Updated	Feb 07, 2021
Title Company	STEWART TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000005128
Date	Feb 07, 2020
Instrument	2020-0005128

Lender

Name	FIRST REPUBLIC BANK
Type	Bank
Address	SAN FRANCISCO, CA 94111

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Mar 01, 2050

Interest

Rate Type	Adjustable Rate
Rate	3.35%
Type Change Date	Mar 01, 2030
Change Frequency	Monthly
Min Rate At Change	2.95%
Index	1-Year CMT
Max Rate	10.9%

September 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731
Transaction Type	Mortgage
Record Updated	Feb 05, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000035221
Date	Sep 01, 2017
Instrument	2017-0035221

Lender

Name	PATELCO CU
Type	Credit Union
Address	PLEASANTON, CA 94588

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	301 Months
Due	Sep 30, 2042

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

February 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	20 CORNWALL ST, MILL VALLEY, CA 94941-1731
Transaction Type	Mortgage
Record Updated	Feb 05, 2021
Title Company	STEWART TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000005129
Date	Feb 07, 2020
Instrument	2020-0005129

Lender

Name	FIRST REPUBLIC BANK
Type	Bank
Address	SAN FRANCISCO, CA 94108

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	300 Months
Due	Feb 26, 2045

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

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

Year	Tax Bill	Assessed Value
2026		$1,586,399 (+2%) Land $112,740 Building $1,473,659
2025	$21,762.00 (+3.54%) Homeowner's exemption	$1,555,302 (+4.04%) Land $110,529 Building $1,444,773
2023	$21,018.00 (+2.18%) Homeowner's exemption	$1,494,923 Land $106,239 Building $1,388,684
2022	$20,569.00

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 060411270004, 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 AO, within 500 ft
Flood Insurance Cost	Premium on Record median of 10 individual NFIP policies nearby
Nearby Flood Policies	10 in force
Nearby Flood Claims	2 (2005–2007)
Claims Outside the SFHA	1 of 2
Most Recent Claim	May 2007, other causes

Wildfire

Wildfire Risk	Moderate above 40% of the US · above 24% of California
Wildfire Likelihood	About 1 in 1,493 per year
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 340 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

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

Mobile Coverage

5G and 4G LTE (outdoors only)

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