20 Walnut Ave, Mill Valley, CA 94941
Property image
Property image
OFF MARKET

$4,973,200

Trulia Estimate
  • 4 Beds
  • 4 Baths
  • 2,500 sqft

20 Walnut Ave, Mill Valley, CA 94941

Sycamore/Tamalpais Park
Est. Refi. Payment $31,926/mo*
Refinance Your Home
Currently Off Market - Sold Oct 24, 2023 for $4,100,000

Home Value

Trulia Estimate
$4.97M
Since last month
Increased$10K (+0.2%)
Since last year
Increased$386K (+8.5%)
Since last sale
Increased$825K (+20.1%)
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 +133% in the last 10 years
MonthEstimated value
2026
September 2026$4.93M
August 2026$4.92M
July 2026$4.75M
June 2026$4.87M
May 2026$4.77M
April 2026$4.61M
March 2026$4.52M
February 2026$4.49M
January 2026$4.3M
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 Alvarado Avenue, Mill Valley, CA
0.22
Single-Family Home
$4,620,000
09/29/26
4
3.5
2,331
30 Walnut Avenue, Mill Valley, CA
0.03
Single-Family Home
$3,600,000
05/20/26
4
2
1,992
35 Sycamore Ave, Mill Valley, CA
0.03
Single-Family Home
$5,625,000
02/13/26
4
4
3,716
18 Thalia St, Mill Valley, CA
0.10
Single-Family Home
$3,800,000
03/13/26
3
3
2,635
31 Alvarado Avenue, Mill Valley, CA
0.22
Single-Family Home
$3,855,000
04/28/26
4
3
2,574
10 Avon Ave, Mill Valley, CA
0.35
Single-Family Home
$3,000,000
03/05/26
4
3.5
2,210
357 - A Molino Avenue, Mill Valley, CA
0.27
Single-Family Home
$2,200,000
06/10/26
4
3.5
2,234
15 E Manor Dr, Mill Valley, CA
0.28
Single-Family Home
$4,450,000
04/23/26
4
4
2,847
357 Molino Ave, Mill Valley, CA
0.24
Single-Family Home
$2,200,000
06/10/26
4
3
2,234
90 Walnut Avenue, Mill Valley, CA
0.17
Single-Family Home
$5,850,000
05/22/26
3
3
2,292

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
16 Walnut Ave #16, Mill Valley, CA 94941
0.01
-
1
1
650
Off Market
16 Walnut Ave, Mill Valley, CA 94941
0.01
$2,226,200
3
2
1,252
Off Market
24 Walnut Ave, Mill Valley, CA 94941
0.01
$3,268,100
2
2
1,854
Off Market
26 Walnut Ave, Mill Valley, CA 94941
0.02
$3,238,900
2
2
1,820
Off Market
14 Walnut Ave, Mill Valley, CA 94941
0.02
$6,026,400
4
3
2,889
Off Market
30 Walnut Avenue, Mill Valley, CA 94941
0.03
$3,600,000
4
2
1,992
Recently Sold
10 Walnut Ave, Mill Valley, CA 94941
0.03
$2,330,000
2
2
1,472
Off Market
37 Sycamore Ave, Mill Valley, CA 94941
0.03
$4,262,200
4
2
2,966
Off Market
45 Sycamore Avenue, Mill Valley, CA 94941
0.03
$6,358,800
4
2.5
2,984
Off Market
284 E Blithedale Ave, Mill Valley, CA 94941
0.03
$4,299,500
4
4
3,300
Off Market
35 Sycamore Ave, Mill Valley, CA 94941
0.03
$5,625,000
4
4
3,716
Recently Sold
284 E Blithedale Ave #2, Mill Valley, CA 94941
0.04
-
Studio
1
500
Off Market
288 E Blithedale Ave, Mill Valley, CA 94941
0.04
$549,000
4
2
1,700
Recently Sold
280 E Blithedale Ave, Mill Valley, CA 94941
0.04
$2,921,700
3
2
1,723
Off Market
34 Walnut Avenue, Mill Valley, CA 94941
0.04
$1,510,900
2
1
816
Off Market
290 E Blithedale Ave, Mill Valley, CA 94941
0.04
-
4
3
1,567
Off Market
51 Sycamore Ave, Mill Valley, CA 94941
0.04
$3,563,400
4
3
1,540
Off Market
43 Park Ave, Mill Valley, CA 94941
0.04
$4,045,900
4
2
2,610
Off Market
23 Walnut Ave, Mill Valley, CA 94941
0.04
$12,810,700
4
4
6,076
Off Market
51 Park Ave, Mill Valley, CA 94941
0.04
$2,009,600
3
2
1,657
Off Market

Local Information

  • Map ViewExplore the area around 20 Walnut Ave.
  • Schools5 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Single-Family Home
Built in 1909
2,500 sqft
$1,989/sqft
Garage

About this House

Charming renovated Craftsman style 3 bdrm, 3 bath home with detached 1 bedroom guest house on large level lot in the heart of Sycamore Park. The main level open floor plan features a chef's kitchen & spacious great room that spills out to the covered loggia w/ outdoor fireplace, b-b-q & level lawn. Private main level master suite w/ 2 bdrms & bath on 2nd level. Detached guest house w/ projection screen tv & home gym. Gorgeous level lawn w/ in ground hot tub & putting green.
20 Walnut Ave, Mill Valley, CA 94941 is a 4 bedroom, 4 bathroom, 2,500 sqft single-family home in Sycamore/Tamalpais Park, built in 1909. It last sold for $4,100,000 on Oct 24, 2023. More recently, it was listed as a rental in May 2020 with an asking price of $12,000 per month. That rental listing was removed on May 27, 2020. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $4,973,200.

Home Details for 20 Walnut Ave

Interior Features

Heating & Cooling
Heating: WallHeating Fuel: Wall
Interior Details
Types of Rooms: Dining Room
Fireplace & Spa
Fireplace

Property Information

Year Built
Year Built: 1909Year Updated: 1974
Property Type / Style
Property Type: Single Family HomeArchitecture: Contemporary

Exterior Features

Exterior Home Features
Exterior: Shingle Not Wood
Parking & Garage
GarageParking: Garage Attached

Community

Units in Building: 2

Lot Information

Lot Area: 10500 sqft

Price and Tax history

DateEventPrice
Oct 24, 2023
Source: N/A
Sold
$4,100,000
May 27, 2020
Source: Agent Provided
ListingRemoved
$12,000
May 14, 2020
Source: Agent Provided
Listed For Rent
$12,000
Oct 14, 2019
Source: Agent Provided
ListingRemoved
$11,000
Oct 11, 2019
Source: Agent Provided
Listed For Rent
$11,000

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

Sycamore/Tamalpais Park
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Sycamore/Tamalpais Park

At least 15 Trulia users voted on each feature.

  • 100 % Say parking is easy

  • 100 % Say it's dog friendly

  • 96 % Say it's walkable to restaurants

  • 95 % Say there's wildlife

  • 95 % Say it's walkable to grocery stores

  • 94 % Say there are sidewalks

  • 88 % Say people would walk alone at night

  • 87 % Say kids play outside

  • 85 % Say car is needed

  • 78 % Say there's holiday spirit

  • 74 % Say yards are well-kept

  • 71 % Say they plan to stay for at least 5 years

  • 71 % Say neighbors are friendly

  • 58 % Say it's quiet

  • 48 % Say there are community events

  • 39 % Say streets are well-lit

Sourced by Trulia users. Learn more about our methodology.
  • G2m74vt2m2
    "Safe streets and the city workers are so good at keeping parks ,streets and the community center spotless. "
    0
    Flag
  • Em J. H.
    "Plenty of dog owners and parks and access to the bike path and dog park and hiking. Ssssssssssssssssss"
    2
    Flag
  • Esherpadotnet t.
    "Love this neighborhood! People are friendly, it's very quiet, very easy access to trails, and a super convenient location for commuting into the city. If only real estate prices would be more reasonable..."
    0
    Flag
  • dan m.
    "Love it here. We moved into the neighborhood a few months ago. Why am I still on Trulia? Doing some market research for work. I would say this is a fantastic family-oriented location. Unfortunately, inventory is super tight. Good luck in your search!"
    0
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 20 Walnut Ave

  • What is 20 Walnut Ave estimated to be worth?
    Trulia's estimated value for 20 Walnut Ave in Mill Valley, CA is $4,973,200.
  • What is the price history for 20 Walnut Ave?
    20 Walnut Ave in Mill Valley, CA last sold for $4,100,000 in October 2023.
  • 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.
  • How big is the lot at 20 Walnut Ave?
    The lot at 20 Walnut Ave in Mill Valley, CA is about 0.24 acres (10,500 sq ft).
  • Does 20 Walnut Ave have a garage?
    Yes, 20 Walnut Ave in Mill Valley, CA has a garage.

Explore by feature - Pet Friendly

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Explore by feature - Outdoor Space

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Apartments for Rent

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Off Market Homes Near 20 Walnut Ave

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