Google street view image for 12 Shell Rd, Mill Valley, CA 94941

Off Market Sep 2018 for $1.7M

$2,969,339

Est. refi paymentEst. refi $10,539/mo

•

3 ba

•

2,392

sq ft

12 Shell Rd, Mill Valley, CA 94941

About this home

12 Shell Rd is a 2,392 square foot house on a 8,700 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on September 19, 2018 for $1,700,000. Based on Redfin's Mill Valley data, we estimate the home's value is $2,969,339.

Single-familyProperty Type

1939Year Built

8,700 sq ftLot Size

$1,241Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,969,339

$1.3M since sold in September 2018$681K since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 12.2% higher than the average sale price ($2.65M) of 6 comparable homes.

SOLD JUN 2, 2026
$2,950,000
A
4 beds3 baths2,380 sq ft
82 S Knoll Rd, Mill Valley, CA 94941
SOLD MAR 24, 2026
$2,507,000
B
4 beds3 baths2,337 sq ft
3 Longfellow Rd, Mill Valley, CA 94941
SOLD JUL 22, 2026
$2,255,000
C
4 beds3 baths2,880 sq ft
54 Bay Vista Dr, Mill Valley, CA 94941
SOLD MAY 18, 2026
$3,362,500
D
4 beds3 baths2,386 sq ft
305 Ricardo Rd, Mill Valley, CA 94941
SOLD JUN 25, 2026
$2,300,000
E
4 beds3 baths3,066 sq ft
117 Longfellow Rd, Mill Valley, CA 94941
SOLD APR 9, 2026
$2,500,000
F
4 beds3 baths2,190 sq ft
138 Kipling Dr, Mill Valley, CA 94941

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Earn from this home

Sell

$1,674,449

Est. take-home

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Refinance

Est. cash available

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Rent

$9,329/mo

Redfin rental estimate

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Market trends in 94941, CA

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

108.7%

0.1% MoM

Median sale price

$2.4M

$7K MoM

Avg. days on market

10d

1 days MoM

Recently sold homes

134

20 MoM

New listings for sale

OPEN WED, 11AM TO 2PM
$2,495,000
4 beds2 baths2,085 sq ft
60 Mesa Ave, Mill Valley, CA 94941
OPEN SAT, 12PM TO 2PM
$1,350,000
2 beds1 bath1,022 sq ft
204 Hawthorne Ave, Mill Valley, CA 94941
Lifestyle Realty
OPEN WED, 10:30AM TO 1:30PM
$1,588,000
3 beds2 baths— sq ft
206 Cardinal Rd, Mill Valley, CA 94941
OPEN SAT, 2PM TO 4PM
$2,795,000
4 beds3 baths2,252 sq ft
133 Shelley Dr, Mill Valley, CA 94941
3D WALKTHROUGH
$2,795,000
3 beds2 baths2,389 sq ft
240 Perry St, Mill Valley, CA 94941
OPEN WED, 10AM TO 1PM
$1,795,000
3 beds3 baths1,655 sq ft
642 Amaranth Blvd, Mill Valley, CA 94941
$888,999
3 beds2.5 baths1,374 sq ft
13 Wordsworth Ct, Mill Valley, CA 94941
eXp Realty of California Inc.
OPEN WED, 11AM TO 2PM
$2,450,000
4 beds3.5 baths2,370 sq ft
274 Princeton Ave, Mill Valley, CA 94941
3D WALKTHROUGH
$1,385,000
3 beds1 bath1,118 sq ft
143 Richardson Dr, Mill Valley, CA 94941
22 Ethel Ave, Mill Valley, CA 94941
$2,249,000
3 beds4.5 baths1,484 sq ft
22 Ethel Ave, Mill Valley, CA 94941
(415) 261-5049
See all

Provided by Redfin

Sale history for 12 Shell Rd

Year

Property tax

Land + Additions

Assessment*

2025

$32,894 (+24.0%)

$887,491 + $1,730,185

$2,617,676

2024

$26,526 (+1.5%)

$870,090 + $1,511,260

$2,381,350

2023

$26,133 (+3.2%)

$853,031 + $1,006,139

$1,859,170

2022

$25,321 (+1.5%)

$836,308 + $986,414

$1,822,722

2021

$24,944 (+0.1%)

$819,912 + $967,076

$1,786,988

2020

$24,912 (+2.2%)

$803,836 + $948,115

$1,751,951

2019

$24,376 (+63.8%)

$795,600 + $938,400

$1,734,000

2018

$14,886 (+5.0%)

$780,000 + $920,000

$1,700,000

2017

$14,180 (+6.1%)

$510,579 + $370,410

$880,989

2016

$13,368 (+10.2%)

$510,579 + $370,410

$880,989

2015

$12,133 (+3.4%)

$500,570 + $363,149

$863,719

2014

$11,738 (+0.3%)

$483,393 + $350,688

$834,081

2013

$11,707 (+4.4%)

$483,393 + $350,688

$834,081

2012

$11,210 (+3.3%)

$481,212 + $349,106

$830,318

2011

$10,847 (+1.5%)

$471,778 + $342,261

$814,039

2010

$10,688 (+4.5%)

$462,528 + $335,551

$798,079

2009

$10,228 (+5.3%)

$459,073 + $333,044

$792,117

2008

$9,716

$460,165 + $333,837

$794,002

Tax history for 12 Shell Rd

Year

Property tax

Land + Additions

Assessment*

2025

$32,894 (+24.0%)

$887,491 + $1,730,185

$2,617,676

2024

$26,526 (+1.5%)

$870,090 + $1,511,260

$2,381,350

2023

$26,133 (+3.2%)

$853,031 + $1,006,139

$1,859,170

2022

$25,321 (+1.5%)

$836,308 + $986,414

$1,822,722

2021

$24,944 (+0.1%)

$819,912 + $967,076

$1,786,988

2020

$24,912 (+2.2%)

$803,836 + $948,115

$1,751,951

2019

$24,376 (+63.8%)

$795,600 + $938,400

$1,734,000

2018

$14,886 (+5.0%)

$780,000 + $920,000

$1,700,000

2017

$14,180 (+6.1%)

$510,579 + $370,410

$880,989

2016

$13,368 (+10.2%)

$510,579 + $370,410

$880,989

2015

$12,133 (+3.4%)

$500,570 + $363,149

$863,719

2014

$11,738 (+0.3%)

$483,393 + $350,688

$834,081

2013

$11,707 (+4.4%)

$483,393 + $350,688

$834,081

2012

$11,210 (+3.3%)

$481,212 + $349,106

$830,318

2011

$10,847 (+1.5%)

$471,778 + $342,261

$814,039

2010

$10,688 (+4.5%)

$462,528 + $335,551

$798,079

2009

$10,228 (+5.3%)

$459,073 + $333,044

$792,117

2008

$9,716

$460,165 + $333,837

$794,002

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Property details

Interior

Heating & Cooling
Heating Type: Central

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Exterior

Exterior Information
Building Style Type: Contemporary
Construction Type: Frame
Building Construction Quality: Average
Exterior Wall: Asbestos Shingle

Property Information
Subdivision Name: ALTO 01
Living Sq. Ft: 2,392
Building Sq. Ft: 2,392
# of Units: 1
# of Stories: 1
Legal Description: MAP G3 606

Parking & Garage Information
# of Parking Spaces: 2

Lot Information
# of Buildings: 1
Land Sq. Ft: 8,700
Legal Lot Number: 49
Legal Block Number: A
Municipality Name: MILL VALLEY SCHOOL AREA (ALTO)
Acres: 0.1997
County Use Description: 1 FAMILY RESID

Utility Information
Sewer Type: Public
Water Service Type: Public

Financial

Assessor Information
Assessment Year: 2026
Tax Area: MILL VALLEY SCHOOL AREA (ALTO)

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 2,392
Stories: 1.0
Lot Size: 8,700 square feet
Style: Single Family Residential
Year Built: 1939
Year Renovated: 1974
County: Marin County
APN: 033-071-15

Home facts updated by county records on Jul 13, 2026

Around this home

Schools
Places
Transit

Edna Maguire Elementary School

Public K-5 • Assigned • 0.5mi

10/10

Mill Valley Middle School

Public 6-8 • Assigned • 0.9mi

9/10

Tamalpais High School

Public 9-12 • Assigned • 1.3mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

3/10 Heat Factor

8 days above 83° expected this year, 18 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

8/10 Air Factor

13 unhealthy days expected this year, 13 days in 30 years

Provided by First Street

Historical weather

Mill Valley, CA • 94941

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 10.6 hours in June and 5 hours in December, placing it above the U.S. average for solar exposure.

10.6 hrs

5 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.82M – $3.42M

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New listings for sale in 94941

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OPEN SAT, 12PM TO 2PM

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Lifestyle Realty

OPEN WED, 10:30AM TO 1:30PM3D WALKTHROUGH

$1,588,000

3 beds2 baths— sq ft

206 Cardinal Rd, Mill Valley, CA 94941

OPEN SAT, 2PM TO 4PM3D WALKTHROUGH

$2,795,000

4 beds3 baths2,252 sq ft

133 Shelley Dr, Mill Valley, CA 94941

3D WALKTHROUGH

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240 Perry St, Mill Valley, CA 94941

OPEN WED, 10AM TO 1PM

$1,795,000

3 beds3 baths1,655 sq ft

642 Amaranth Blvd, Mill Valley, CA 94941

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eXp Realty of California Inc.

OPEN WED, 11AM TO 2PM

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Home values near 12 Shell Rd

Data from public records.

Address	Redfin Estimate
24 Shell Road, Mill Valley, CA 3 Beds \| 2 Baths \| 1400 Sq. Ft.	$2,370,749
3 Shell Road, Mill Valley, CA 2 Beds \| 1 Baths \| 1014 Sq. Ft.	$1,687,989

Address	Redfin Estimate
5 Shell Road, Mill Valley, CA 4 Beds \| 3 Baths \| 1951 Sq. Ft.	$2,245,144
24 Shell Road #A, Mill Valley, CA 3 Beds \| 3 Baths \| 2309 Sq. Ft.	$2,439,631

Address	Redfin Estimate
17 Shell Road, Mill Valley, CA 3 Beds \| 3 Baths \| 1801 Sq. Ft.	$2,120,133
22 Shell Road, Mill Valley, CA 2 Beds \| 1 Baths \| 1296 Sq. Ft.	$1,620,743

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About this home

Redfin Estimate

Earn from this home

Market trends in 94941, CA

Sale history for 12 Shell Rd

Tax history for 12 Shell Rd

Property details

Around this home

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94941

Home values near 12 Shell Rd

More real estate resources