21 Renz Rd, Mill Valley, CA 94941 Property Records

Marin County property record for 21 Renz Rd, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	5 bd · 3.5 ba · 3,905 sqft · built 1984
Lot Size	0.462 acres (20,125 sqft)
Owner	2 Individual Names on File
Last Sale	$2,125,000 (Aug 2023)
Tax Bill	$28,898 (2025)
Deeds & Mortgages	Oct 2025 Mortgage Aug 2023 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`027-234-03`

Property Details

APN / Parcel Number

Primary APN	`027-234-03`

Interior

Bedrooms	5 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Building Area	3,905 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1984
Effective Year Built	Effective 1984
Architectural Style	Contemporary
Lot Area	20,125 sqft (0.462 acres)
Garage Area	400 sqft
Parking Spaces	2 Parking Spaces
Deck Area	732 sqft
Patio Area	732 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	21 RENZ RD
City	MILL VALLEY
State	CA
Zip	94941-5030
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	MAP 18 PG 20 LOT 389
Legal Subdivision	P18 20
Legal Lot Number	389
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	3
Census Block	3000
Census Tract	127000

Owner

21 Renz Rd is owned and occupied by two individuals who bought it in August 2023.

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

Owner of Record	2 Individual Names on File
Mailing Address	21 RENZ RD, MILL VALLEY, CA 94941-5030
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Oct 10, 2025	Deed of Trust, Mortgage · Conventional Mortgage WELLS FARGO BANK NA
Aug 31, 2023	Grant Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 31, 2023 · Amount on File
Deed Sale	Aug 31, 2023 · Amount on File
Prior Sale	Oct 13, 2016
Deed Document Number	202321551
Prior Transfer Date	May 10, 2023
Prior Transfer Doc	0000012438
Record Updated	Sep 20, 2026

October 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	21 RENZ RD, MILL VALLEY, CA 94941-5030
Transaction Type	Mortgage
Record Updated	Oct 22, 2025

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21 RENZ RD, MILL VALLEY, CA 94941-5030

Mortgage

Document Number	0000026114
Date	Oct 10, 2025
Instrument	2025-0026114

Lender

Name	WELLS FARGO BANK NA
Type	Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Nov 1, 2055

Interest

Rate Type	Adjustable Rate
Rate	5.75%
Type Change Date	Nov 1, 2032
Change Frequency	6 Months
Min Rate At Change	3.75%
Max Rate At Change	7.75%
Index	SOFR Average 30-Day
Max Rate	10.7%

August 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Aug 31, 2023
Property Address	21 RENZ RD, MILL VALLEY, CA 94941-5030
Document Number	0000021551
Map Reference	VOL 18 PG 20
Instrument Date	Aug 17, 2023
Instrument	2023-0021551
Transaction Type	Transfer
Record Updated	Sep 15, 2023
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$2,337.50
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	21 RENZ RD, MILL VALLEY, CA 94941-5030

Mortgage

Document Number	0000021552
Date	Aug 31, 2023
Instrument	2023-0021552

Lender

Name	WELLS FARGO BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Sep 1, 2053

Tax Assessment & Valuation

The 2025 property tax bill for 21 Renz Rd was $28,898.

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		$2,210,850 (+2%) Land $1,326,510 Building $884,340
2025	$28,898.00	$2,167,500 Land $1,300,500 Building $867,000
2023	$16,858.00 (+18.06%) Homeowner's exemption	$892,191 Land $208,893 Building $683,298
2022	$14,279.00

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.

Flood

FEMA maps place 21 Renz Rd in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1982.

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	5 in force
Nearby Flood Claims	4 (1982–1998)
Claims Outside the SFHA	3 of 4
Most Recent Claim	Jan 1998 · rainfall accumulation

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

Wildfire risk around 21 Renz Rd is moderate, ranking above 48% of the US, with a 0.1% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Moderate above 48% of the US · lower than 71% of California
Wildfire Likelihood	0.1% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 340 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: Unwired, Verizon.

Cell Coverage

5G (outdoors only) and 4G LTE

Nearby Properties on Renz Rd

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures