20 Cornwall St, Mill Valley, CA 94941
OFF MARKET

20 Cornwall St
Mill Valley, CA 94941

Cascade Canyon
  • 3 Beds
  • 4 Baths
  • 3,204 sqft (on 0.31 acres)

$3,063,700

Trulia Estimate
as of Aug 14, 2026
Est. Refi. Payment $18,387/mo*
Refinance Your Home

$3,063,700

Trulia Estimate
as of Aug 14, 2026
Est. Refi. Payment $18,387/mo*
Refinance Your Home
3 Beds
4 Baths
3,204 sqft
(on 0.31 acres)

Home Value

Trulia Estimate
$3.06M
Since last month
Decreased$109K (-3.4%)
Since last year
Increased$276K (+9.6%)
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 +8% in the last 10 years
MonthEstimated value
2026
August 2026$3.15M
July 2026$3.14M
June 2026$3.26M
May 2026$3.34M
April 2026$3.13M
March 2026$3.1M
February 2026$3.04M
January 2026$2.9M
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

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
39 Renz Road, Mill Valley, CA
0.09
Single-Family Home
$2,850,000
04/10/26
3
3.5
2,463
128 Tamalpais Avenue, Mill Valley, CA
0.30
Single-Family Home
$3,250,000
08/07/26
3
4
2,288
4 Wainwright Place, Mill Valley, CA
0.11
Single-Family Home
$1,770,000
10/06/25
4
2.5
2,350
200 HAZEL Avenue, Mill Valley, CA
0.26
Single-Family Home
$3,550,000
05/29/26
4
3.5
3,249
169 Rose Avenue, Mill Valley, CA
0.39
Single-Family Home
$2,550,000
03/27/26
4
3.5
3,629
151 Tamalpais Avenue, Mill Valley, CA
0.25
Single-Family Home
$2,825,000
03/23/26
4
3
2,065
116 Cascade Drive, Mill Valley, CA
0.25
Single-Family Home
$6,887,500
05/07/26
4
4.5
4,661
300 Hazel Avenue, Mill Valley, CA
0.22
Single-Family Home
$1,800,000
03/09/26
3
2
1,884
410 Monte Vista Avenue, Mill Valley, CA
0.24
Single-Family Home
$2,525,000
03/27/26
5
3
2,870
222 Marguerite Avenue, Mill Valley, CA
0.37
Single-Family Home
$2,616,000
01/12/26
4
5
2,925

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
516 Throckmorton Avenue, Mill Valley, CA 94941
0.09
$4,299,200
5
3.5
3,509
Off Market
291 Lovell Avenue, Mill Valley, CA 94941
0.11
$2,021,400
3
2
1,760
Off Market
39 Renz Road, Mill Valley, CA 94941
0.09
$2,850,000
3
3.5
2,463
Recently Sold
280 Lovell Avenue, Mill Valley, CA 94941
0.14
$3,537,600
5
2.5
2,600
Off Market
4 Wainwright Place, Mill Valley, CA 94941
0.11
$1,861,300
4
2.5
2,350
Off Market
27 Throckmorton Lane, Mill Valley, CA 94941
0.13
$4,536,400
5
3.5
4,283
Off Market
34 Renz Road, Mill Valley, CA 94941
0.14
$3,435,100
4
3.5
3,117
Off Market
25 Renz Road, Mill Valley, CA 94941
0.13
$1,274,200
2
2.5
1,350
Off Market
351 Lovell Avenue, Mill Valley, CA 94941
0.15
$6,556,200
6
6.5
5,093
Off Market
3 Wainwright Place, Mill Valley, CA 94941
0.14
$2,258,200
2
2
1,906
Off Market
2 Wainwright Pl, Mill Valley, CA 94941
0.15
$495,000
-
-
-
Foreclosure
21 Renz Road, Mill Valley, CA 94941
0.17
$2,695,300
5
3.5
3,905
Off Market

Local Information

  • Map ViewExplore the area around 20 Cornwall St.
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
2007
Lot Size
0.31 acres
Living Area
3,204 sqft
Price/Sqft
$956
Parking
Garage

About this House

This single-family home is located at 20 Cornwall St, Mill Valley, CA. 20 Cornwall St is in the Cascade Canyon neighborhood in Mill Valley, CA and in ZIP code 94941. This property has 3 bedrooms, 4 bathrooms and approximately 3,204 sqft of floor space. This property has a lot size of 0.31 acres and was built in 2007.
20 Cornwall St, Mill Valley, CA 94941 is a 3 bedroom, 4 bathroom, 3,204 sqft single-family home in Cascade Canyon, built in 2007. It is currently off market. The Trulia Estimate is $3,063,700, with a rent estimate of $14,000/month.

Home Details for 20 Cornwall St

Interior Features

Heating & Cooling
Heating: OtherHeating Fuel: Other
Fireplace & Spa
Fireplace

Property Information

Year Built
Year Built: 2007Year Updated: 2007
Property Type / Style
Property Type: Single Family Home

Exterior Features

Exterior Home Features
Deck
Parking & Garage
GarageParking: Garage Attached

Community

Units in Building: 1

Lot Information

Lot Area: 0.31 acres

Price and Tax history

YearProperty taxTax assessment
2025
$21,762
$1,555,302
Home facts updated by county records

Market trends in Mill Valley

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.48M
$73.33KMoM
Sale-to-List Price
108.3%
Price per sq ft
$1.14K
$54MoM
Available listings
40
14MoM
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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

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

What Locals Say about Cascade Canyon

At least 6 Trulia users voted on each feature.

  • 93 % Say car is needed

  • 92 % Say it's dog friendly

  • 92 % Say people would walk alone at night

  • 90 % Say it's walkable to grocery stores

  • 88 % Say there's wildlife

  • 85 % Say it's quiet

  • 83 % Say they plan to stay for at least 5 years

  • 82 % Say it's walkable to restaurants

  • 74 % Say neighbors are friendly

  • 73 % Say parking is easy

  • 73 % Say yards are well-kept

  • 67 % Say there's holiday spirit

  • 63 % Say kids play outside

  • 25 % Say there are community events

  • 20 % Say there are sidewalks

  • 14 % Say streets are well-lit

Sourced by Trulia users. Learn more about our methodology.
  • Tylernewby
    "Although there aren’t many sidewalks in the neighborhood, there is easy access to trails, for and quiet low-traffic streets for dog walking."
    1
    Flag
  • Jarion
    "Fall Arts Festival, Djangofest, Marin Theatre Company, Comedy Night, Mountain Play, marin Shakespeare Theater, Mill Valley Film Festival, Free comedy Night in the street, The Dipsea Run, Wine Festival, Winter Festival"
    2
    Flag
  • Jarion
    "Mill Valley is Dog Town. The dog parks are the best in the world right along the bay. Shop owners have water for dogs; many have treats for them, too. We have thousands of dogs here!"
    1
    Flag
  • Laekasfamily
    "it has outstanding access to trails and parks. the views from this part of Mill Valley are extraordinary. there are a nice mix of ling time neighbors and new neighbors. the weather here is particularly warm and sunny."
    0
    Flag
  • Todd G.
    "The neighbors are friendly and the views are great. this neighborhood is positioned in the middle of the Dipsea, Cypress, and Old Pipeline Trails, so running, hiking, and biking is just out your front door. In the center of the neighborhood there's a large permanent designated Open Space Park Area that used to be the Old Mill Valley Reservoir that people, kids, and dogs walk and play in. Their are only 12 houses on the private road, so there's not a lot of traffic and it's quiet and peaceful. Once a year there's an annual neighborhood block party at the end of Edgewood Ave. "
    0
    Flag

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Apartments for Rent

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Explore by feature - Pet Friendly

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Homes for sale near 20 Cornwall St

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Off Market Homes Near 20 Cornwall St

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Frequently asked questions about 20 Cornwall St

  • What is 20 Cornwall St estimated to be worth?
    Trulia's estimated value for 20 Cornwall St in Mill Valley, CA is $3,063,700.
  • 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 $2.48M. That is up $73.33K from the prior month.
  • What do residents say about the Cascade Canyon neighborhood?
    Residents describe the Cascade Canyon neighborhood in Mill Valley, CA as dog-friendly, walkable to grocery stores, and quiet. See recently sold homes in Cascade Canyon, Mill Valley.
  • How big is the lot at 20 Cornwall St?
    The lot at 20 Cornwall St in Mill Valley, CA is about 0.31 acres (13,721 sq ft).
  • Does 20 Cornwall St have a garage?
    Yes, 20 Cornwall St in Mill Valley, CA has a garage.