20 Walnut Ave, Mill Valley, CA 94941
OFF MARKET

20 Walnut Ave
Mill Valley, CA 94941

Sycamore/Tamalpais Park
  • 4 Beds
  • 4 Baths
  • 2,500 sqft

$4,878,700

Trulia Estimate
as of Jun 26, 2026
Est. Refi. Payment $28,346/mo*

$4,878,700

Trulia Estimate
as of Jun 26, 2026
Est. Refi. Payment $28,346/mo*
4 Beds
4 Baths
2,500 sqft

Local Information

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

Description

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.
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources.

Home Highlights

Parking
Garage
Outdoor
No Info
A/C
Heating only
HOA
None
Price/Sqft
No Info
Listed
Less than a day ago

Home Details for 20 Walnut Ave

Interior Features

Heating & Cooling
Heating: Wall, OtherHeating 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 History for 20 Walnut Ave

DatePriceEventSource
10/24/2023$4,100,000Sold
N/A
05/27/2020$12,000ListingRemovedAgent Provided
05/14/2020$12,000Listed For RentAgent Provided
10/14/2019$11,000ListingRemovedAgent Provided
10/11/2019$11,000Listed For RentAgent Provided
07/27/2019$11,000ListingRemovedAgent Provided
07/03/2019$11,000PriceChange
Agent Provided
04/18/2019$12,500Listed For RentAgent Provided
08/29/2009$2,695,000ListingRemovedAgent Provided
08/07/2009$2,695,000Listed For SaleAgent Provided
04/15/2004$890,000Sold
N/A
08/21/1998$1,364,000Sold
N/A

Market trends in Mill Valley

Last updated May 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.11M
$75K
MoM
Sale-to-List Price
105.3%
4.1%
MoM
Price per sq ft
$1.01K
$33
MoM
Available listings
79
3
MoM
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Property Tax and Assessment

Year2025
Tax$51,680
Assessment$4,242,000
Home facts updated by county records

Comparable Sales for 20 Walnut Ave

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
0.06
Single-Family Home
$2,900,000
07/11/25
4
3
2,565
0.03
Single-Family Home
$3,600,000
05/20/26
4
2
1,992
0.08
Single-Family Home
$6,300,000
08/15/25
4
4.5
3,206
0.03
Single-Family Home
$5,625,000
02/13/26
4
4
3,716
0.10
Single-Family Home
$3,800,000
03/13/26
3
3
2,635
0.22
Single-Family Home
$3,855,000
04/28/26
4
3
2,574
0.35
Single-Family Home
$3,000,000
03/05/26
4
3.5
2,210
0.16
Single-Family Home
$2,850,000
09/22/25
4
3
2,621
0.27
Single-Family Home
$2,200,000
06/10/26
4
3.5
2,234
0.28
Single-Family Home
$4,450,000
04/23/26
4
4
2,847

Nearby homes

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Assigned Schools

These are the assigned schools for 20 Walnut Ave.
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

Neighborhood Overview

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. "
  • Em J. H.
    "Plenty of dog owners and parks and access to the bike path and dog park and hiking. Ssssssssssssssssss"
  • 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..."
  • 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!"

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Homes for sale near 20 Walnut Ave

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Off Market Homes Near 20 Walnut Ave

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20 Walnut Ave, Mill Valley, CA 94941 is a 4 bedroom, 4 bathroom, 2,500 sqft single-family home built in 1909. 20 Walnut Ave is located in Sycamore/Tamalpais Park, Mill Valley. This property is not currently available for sale. 20 Walnut Ave was last sold on Oct 24, 2023 for $4,100,000. The current Trulia Estimate for 20 Walnut Ave is $4,878,700.