558 Alta Way, Mill Valley, CA 94941 Property Records

Marin County property record for 558 Alta Way, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	3 bd · 2.5 ba · 2,015 sqft · built 1993
Lot Size	0.152 acres (6,600 sqft)
Owner	2 Company Names on Record
Last Sale	$2,095,000 (Oct 2022)
Tax Bill	$30,630 (2025)
Deeds & Mortgages	Oct 2022 Sale & Mortgage Mar 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`049-041-36`

Property Details

APN / Parcel Number

Primary APN	`049-041-36`

Interior

Bedrooms	3 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Building Area	2,015 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1993
Effective Year Built	Effective 2002
Architectural Style	Contemporary
Lot Area	6,600 sqft (0.152 acres)
Garage Area	345 sqft
Parking Spaces	1 Parking Space
Deck Area	912 sqft
Patio Area	928 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	558 ALTA WAY
City	MILL VALLEY
State	CA
Zip	94941-3900
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	MAP E6 606
Legal Subdivision	GARDEN VLY PARK
Legal Lot Number	24,25
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	2
Census Block	2000
Census Tract	128100

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	2 Company Names on Record
Mailing Address	558 ALTA WAY, MILL VALLEY, CA 94941-3900
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Date	Document
Oct 5, 2022	Grant Deed, Transfer · Conventional Mortgage MUFG UNION BANK NA
Mar 5, 2021	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 5, 2022 · Amount on Record
Deed Sale	Oct 5, 2022 · Amount on Record
Prior Sale	May 7, 2015 · Amount on Record
Deed Document Number	202234176
Prior Transfer Date	Mar 5, 2021
Prior Transfer Doc	0000015695
Record Updated	Oct 29, 2026

October 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Oct 5, 2022
Property Address	558 ALTA WAY, MILL VALLEY, CA 94941-3900
Document Number	0000034176
Map Reference	VOL 5 PG 5
Instrument Date	Sep 30, 2022
Instrument	2022-0034176
Transaction Type	Transfer
Record Updated	Jan 19, 2023
Title Company	FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$2,304.50
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	558 ALTA WAY, MILL VALLEY, CA 94941-3900

Mortgage

Document Number	0000034177
Date	Oct 5, 2022
Instrument	2022-0034177

Lender

Name	MUFG UNION BANK NA
Type	Bank
Address	SAN DIEGO, CA 92121

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2052

Interest

Rate Type	Adjustable Rate
Rate	5.25%
Type Change Date	Nov 1, 2029
Change Frequency	6 Months
Min Rate At Change	3.25%
Max Rate At Change	7.25%
Index	Other
Max Rate	11.2%

March 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Mar 5, 2021
Property Address	558 ALTA WAY, MILL VALLEY, CA 94941-3900
Document Number	0000015695
Map Reference	VOL 5 PG 5
Instrument Date	Mar 5, 2021
Instrument	2021-0015695
Transaction Type	Transfer
Record Updated	Jun 7, 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	Family Trust
Address	558 ALTA WAY, MILL VALLEY, CA 94941-3900

Tax Assessment & Valuation

Source: Marin County assessment roll, as of July 13, 2026

Property Jurisdictions

Type	Name
State	California
County	Marin County
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		$2,223,214 (+2%) Land $986,916 Building $1,236,298
2025	$30,630.00 (+5.9%) Homeowner's exemption	$2,179,638 (+4.04%) Land $967,572 Building $1,212,066
2023	$28,923.00 (+19.11%) Homeowner's exemption	$2,095,000 Land $930,000 Building $1,165,000
2022	$24,282.00

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
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	6 in force
Nearby Flood Claims	6 (1982–2019)
Claims Outside the SFHA	3 of 6
Most Recent Claim	Feb 2019 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Coastal Storms, Floods, Slides & Tornadoes, Mar 1983 · 3 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	0.03% 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 496 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250

May also be available: T-Mobile, Unwired, Verizon.

Cell Coverage

5G (outdoors only) and 4G LTE

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