23 Thoreau Cir, Mill Valley, CA 94941 Property Records

Marin County property record for 23 Thoreau Cir, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	2 bd · 1.5 ba · 1,248 sqft · built 1972
Lot Size	0.028 acres (1,200 sqft)
Owner	Individual Name on Record
Last Sale	$846,000 (Oct 2021)
Tax Bill	$13,597 (2025)
Deeds & Mortgages	Oct 2021 Sale & Mortgage Feb 2018 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`030-291-18`

Property Details

APN / Parcel Number

Primary APN	`030-291-18`

Interior

Bedrooms	2 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Building Area	1,248 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1972
Effective Year Built	Effective 1978
Architectural Style	Colonial
Lot Area	1,200 sqft (0.028 acres)
Deck Area	214 sqft
Patio Area	214 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	23 THOREAU CIR
City	MILL VALLEY
State	CA
Zip	94941-4634
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Subdivision	SHELTER RDG 01
Legal Lot Number	18
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	3
Census Block	3002
Census Tract	126200

Owner

Source: Marin County records, as of July 13, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Individual Name on Record
Mailing Address	23 THOREAU CIR, MILL VALLEY, CA 94941-4634
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Oct 12, 2021	Grant Deed, Transfer · Conventional Mortgage GUARANTEED RATE AFFINITY LLC
Feb 16, 2018	Grant Deed, Transfer · Conventional Mortgage BANK OF AMERICA

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 12, 2021 · Amount on Record
Deed Sale	Oct 12, 2021 · Amount on Record
Prior Sale	Feb 16, 2018 · Amount on Record
Deed Document Number	202162531
Prior Transfer Date	Jun 28, 2006
Prior Transfer Doc	0000043415
Record Updated	Oct 29, 2026

October 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Oct 12, 2021
Property Address	23 THOREAU CIR, MILL VALLEY, CA 94941-4634
Document Number	0000062531
Map Reference	VOL 15 PG 6
Instrument Date	Oct 1, 2021
Instrument	2021-0062531
Transaction Type	Transfer
Record Updated	Oct 26, 2021
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$930.60
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	10 SKYLARK DR APT 38, 38, LARKSPUR, CA 94939-1225

Mortgage

Document Number	0000062532
Date	Oct 12, 2021
Instrument	2021-0062532

Lender

Name	GUARANTEED RATE AFFINITY LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2051

February 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Feb 16, 2018
Property Address	23 THOREAU CIR, MILL VALLEY, CA 94941-4634
Document Number	0000004917
Instrument Date	Feb 12, 2018
Instrument	4917
Transaction Type	Transfer
Record Updated	Feb 28, 2018
Title Company	OLD REPUBLIC TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$834.90
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	23 THOREAU CIR MILL VALLEY CA 949414634, MILL VALLEY, CA 94941-4634

Mortgage

Document Number	4918
Date	Feb 16, 2018
Instrument	4918

Lender

Name	BANK OF AMERICA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Feb 15, 2048

Tax Assessment & Valuation

Source: Marin County assessment roll, as of July 13, 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

Year	Tax Bill	Assessed Value
2026		$915,727 (+2%) Land $324,726 Building $591,001
2025	$13,597.00 (+2.04%) Homeowner's exemption	$897,775 (+4.04%) Land $318,360 Building $579,415
2023	$13,325.00 (+7.78%) Homeowner's exemption	$862,920 Land $306,000 Building $556,920
2022	$12,363.00

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

Flood

Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · 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
Nearby Flood Policies	1 in force
Nearby Flood Claims	18 (1980–2005)
Claims Outside the SFHA	2 of 18
Most Recent Claim	Dec 2005 · Severe Storms, Flooding, Mudslides, And Landslides
Claims by Event	Coastal Storms, Floods, Slides & Tornadoes, Jan 1983 · 3 claims Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 4 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 Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	Direct 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 System	MARIN MUNICIPAL WATER DISTRICT serves 188,116 people · EPA ID CA2110002
Water Source	Surface water
Last State Inspection	Aug 2023
Lead	Under 1 ppb (2019–2021) 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 337 locations within half a mile, as of December 31, 2025

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

May also be available: Etheric Networks, Unwired, Verizon.

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