42 Shell Rd, Mill Valley, CA 94941
OFF MARKET

$3,921,900

Trulia Estimate
  • 4 Beds
  • 3 Baths
  • 2,932 sqft (on 0.32 acres)

42 Shell Rd, Mill Valley, CA 94941

Alto
Est. Refi. Payment $24,705/mo*
Refinance Your Home

Home Value

Trulia Estimate
$3.92M
Since last month
Increased$189K (+5%)
Since last year
Increased$527K (+15.5%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +71% in the last 10 years
MonthEstimated value
2026
September 2026$3.92M
August 2026$3.73M
July 2026$3.77M
June 2026$3.77M
May 2026$3.89M
April 2026$3.79M
March 2026$3.6M
February 2026$3.65M
January 2026$3.47M
2025
2024
2023
2022
2021
2020
2019
2018
2017

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
8 Greenfield Ct, Mill Valley, CA
0.11
Single-Family Home
$3,060,000
08/11/26
3
2.5
2,594
3 Longfellow Road, Mill Valley, CA
0.30
Single-Family Home
$2,507,000
03/24/26
4
3
2,337
17 Vasco Dr, Mill Valley, CA
0.40
Single-Family Home
$5,000,000
01/12/26
4
3
2,252
9 Underhill Road, Mill Valley, CA
0.47
Single-Family Home
$2,810,000
05/06/26
4
3
2,550
15 Underhill Road, Mill Valley, CA
0.49
Single-Family Home
$2,550,000
04/20/26
4
2.5
2,515
20 Shell Road, Mill Valley, CA
0.15
Single-Family Home
$2,505,000
10/07/25
3
1.5
1,735
105 Kipling Drive, Mill Valley, CA
0.38
Single-Family Home
$2,805,000
04/14/26
5
3
2,490
11 Overhill Road, Mill Valley, CA
0.54
Single-Family Home
$2,145,150
10/24/25
4
2.5
2,640
117 Longfellow Road, Mill Valley, CA
0.53
Single-Family Home
$2,300,000
06/25/26
4
3
3,066
138 Kipling Drive, Mill Valley, CA
0.45
Single-Family Home
$2,500,000
04/09/26
4
3
2,190

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
40 Meadow Drive, Mill Valley, CA 94941
0.07
$1,975,500
3
2
1,281
Off Market
44 Meadow Dr, Mill Valley, CA 94941
0.07
$1,894,900
3
2
1,221
Off Market
50 Meadow Drive, Mill Valley, CA 94941
0.08
$1,749,300
3
2
1,216
Off Market
45 Meadow Drive, Mill Valley, CA 94941
0.10
$1,816,600
3
2
1,216
Off Market
57 Meadow Drive, Mill Valley, CA 94941
0.12
$2,753,500
4
2
1,889
Off Market
29 Shell Road, Mill Valley, CA 94941
0.11
$2,210,500
3
2
1,300
Off Market
67 Meadow Drive, Mill Valley, CA 94941
0.15
$3,334,200
4
3
1,970
Off Market
6 Tower Drive, Mill Valley, CA 94941
0.17
$2,735,600
3
3
2,078
Off Market
8 Greenfield Ct, Mill Valley, CA 94941
0.11
$3,060,000
3
2.5
2,594
Recently Sold
66 Meadow Drive, Mill Valley, CA 94941
0.16
$1,826,300
3
2
1,576
Off Market
20 Shell Road, Mill Valley, CA 94941
0.15
$2,579,400
3
1.5
1,735
Off Market
46 Plaza Drive, Mill Valley, CA 94941
0.19
$1,660,000
2
2
1,320
Off Market

Local Information

  • Map ViewExplore the area around 42 Shell Rd.
  • Schools5 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Single-Family Home
Built in 2016
0.32 acre lot
2,932 sqft
$1,338/sqft
Garage

About this House

This single-family home is located at 42 Shell Rd, Mill Valley, CA. 42 Shell Rd is in the Alto neighborhood in Mill Valley, CA and in ZIP code 94941. This property has 4 bedrooms, 3 bathrooms and approximately 2,932 sqft of floor space. This property has a lot size of 0.32 acres and was built in 2016.
42 Shell Rd, Mill Valley, CA 94941 is a 4 bedroom, 3 bathroom, 2,932 sqft single-family home in Alto, built in 2016. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $3,921,900.

Home Details for 42 Shell Rd

Property Information

Year Built
Year Built: 2016Year Updated: 1985
Property Type / Style
Property Type: Single Family HomeArchitecture: Contemporary

Interior Features

Fireplace & Spa
Fireplace

Exterior Features

Exterior Home Features
Deck
Parking & Garage
GarageParking: Garage Attached

Community

Units in Building: 1

Lot Information

Lot Area: 0.32 acres

Price and Tax history

YearProperty taxTax assessment
2026Unavailable
$932,535
Home facts updated by county records

Market trends in Mill Valley

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.28M
$200KMoM
Sale-to-List Price
—
Price per sq ft
$1.08K
$52MoM
Available listings
59
17MoM

Around this home

View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

Neighborhood Overview

Alto
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Alto

At least 1 Trulia users voted on each feature.

  • 100 % Say it's dog friendly

  • 100 % Say they plan to stay for at least 5 years

  • 100 % Say there's holiday spirit

  • 100 % Say it's walkable to grocery stores

  • 100 % Say parking is easy

  • 100 % Say neighbors are friendly

  • 50 % Say it's quiet

Sourced by Trulia users. Learn more about our methodology.
  • Annachristinawest
    "Lots of dog owners and nearby walking and hiking paths make it easy to exercise your pooch. Many dog lovers in our neighborhood "
    0
    Flag
  • danielshiner
    "Having lived in Mill Valley for thirty years, I have to agree with the many sources, including the Smithsonian, who rate this the best place to live in the country. Small town ambiance, ten minutes to San Francisco, a half hour to the wine country. Lots of local culture--theater and music venues abound, with plays, comedy. ballet, opera, and anything else one could desire. The only drawback is the cost of housing."
    0
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 42 Shell Rd

  • What is 42 Shell Rd estimated to be worth?
    Trulia's estimated value for 42 Shell Rd in Mill Valley, CA is $3,921,900.
  • Is Mill Valley a buyer's or seller's market?
    Mill Valley is currently a seller's market, based on recent for-sale activity.
  • What's the median sale price in Mill Valley?
    The median sale price in Mill Valley is $2.28M. That is down $200K from the prior month.
  • What are the closest schools to 42 Shell Rd?
    The closest schools to 42 Shell Rd in Mill Valley, CA are Edna Maguire Elementary School (rated 10/10), Mill Valley Middle School (rated 9/10), Old Mill Elementary School (rated 10/10).
  • How big is the lot at 42 Shell Rd?
    The lot at 42 Shell Rd in Mill Valley, CA is about 0.32 acres (13,895 sq ft).
  • Does 42 Shell Rd have a garage?
    Yes, 42 Shell Rd in Mill Valley, CA has a garage.

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Apartments for Rent

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Off Market Homes Near 42 Shell Rd

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