21 Underhill Rd, Mill Valley, CA 94941
Property image
Property image
OFF MARKET

21 Underhill Rd
Mill Valley, CA 94941

Scott Valley
  • 4 Beds
  • 2 Baths
  • 2,289 sqft (on 0.26 acres)

$3,340,300

Trulia Estimate
as of Aug 19, 2026
Est. Refi. Payment $20,093/mo*
Refinance Your Home

$3,340,300

Trulia Estimate
as of Aug 19, 2026
Est. Refi. Payment $20,093/mo*
Refinance Your Home
4 Beds
2 Baths
2,289 sqft
(on 0.26 acres)

Home Value

Trulia Estimate
$3.34M
Since last month
Decreased$44K (-1.3%)
Since last year
Increased$348K (+11.6%)
Since last sale
Increased$3M (+931%)
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 +49% in the last 10 years
MonthEstimated value
2026
August 2026$3.34M
July 2026$3.38M
June 2026$3.41M
May 2026$3.52M
April 2026$3.41M
March 2026$3.44M
February 2026$3.39M
January 2026$3.17M
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
15 Underhill Road, Mill Valley, CA
0.05
Single-Family Home
$2,550,000
04/20/26
4
2.5
2,515
9 Underhill Road, Mill Valley, CA
0.08
Single-Family Home
$2,810,000
05/06/26
4
3
2,550
7 Madrono Avenue, Corte Madera, CA
0.50
Single-Family Home
$507,500
03/03/26
4
3
2,311
18 Stanton Way, Mill Valley, CA
0.03
Single-Family Home
$3,670,517
02/12/26
3
2.5
1,919
42 Underhill Road, Mill Valley, CA
0.17
Single-Family Home
$2,910,000
04/24/26
3
2.5
2,875
17 Vasco Dr, Mill Valley, CA
0.27
Single-Family Home
$5,000,000
01/12/26
4
3
2,252
1 Vasco Drive, Mill Valley, CA
0.37
Single-Family Home
$2,950,000
09/26/25
4
3
3,035
17 Overhill Road, Mill Valley, CA
0.40
Single-Family Home
$3,625,000
04/17/26
5
2
2,570
9 Coach Road, Mill Valley, CA
0.25
Single-Family Home
$4,805,000
05/11/26
4
3.5
3,234
332 Willow Ave, Corte Madera, CA
0.68
Single-Family Home
$1,600,000
04/15/26
4
3
2,259

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
18 Stanton Way, Mill Valley, CA 94941
0.03
$3,670,517
3
2.5
1,919
Recently Sold
20 Stanton Way, Mill Valley, CA 94941
0.03
$2,776,300
4
2
1,846
Off Market
15 Underhill Road, Mill Valley, CA 94941
0.05
$2,550,000
4
2.5
2,515
Recently Sold
9 Underhill Road, Mill Valley, CA 94941
0.08
$2,810,000
4
3
2,550
Recently Sold
16 Lower Drive, Mill Valley, CA 94941
0.14
$3,689,400
4
2.5
2,739
Off Market
42 Underhill Road, Mill Valley, CA 94941
0.17
$2,910,000
3
2.5
2,875
Recently Sold
17 Eton Way, Mill Valley, CA 94941
0.20
$4,301,100
5
3.5
2,950
Off Market
11 Midhill Drive, Mill Valley, CA 94941
0.21
$2,449,600
3
2
1,945
Off Market
24 Midhill Drive, Mill Valley, CA 94941
0.25
$3,596,500
4
2.5
3,231
Off Market
9 Coach Road, Mill Valley, CA 94941
0.25
$4,805,000
4
3.5
3,234
Recently Sold
1 Vasco Drive, Mill Valley, CA 94941
0.37
$3,095,200
4
3
3,035
Off Market
17 Overhill Road, Mill Valley, CA 94941
0.40
$3,625,000
5
2
2,570
Recently Sold

Local Information

  • Map ViewExplore the area around 21 Underhill Rd.
  • Schools5 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1962
Lot Size
0.26 acres
Living Area
2,289 sqft
Price/Sqft
$1,459
Parking
Garage

About this House

This single-family home is located at 21 Underhill Rd, Mill Valley, CA. 21 Underhill Rd is in the Scott Valley neighborhood in Mill Valley, CA and in ZIP code 94941. This property has 4 bedrooms, 2 bathrooms and approximately 2,289 sqft of floor space. This property has a lot size of 0.26 acres and was built in 1962.
21 Underhill Rd, Mill Valley, CA 94941 is a 4 bedroom, 2 bathroom, 2,289 sqft single-family home in Scott Valley, built in 1962. It last sold for $324,000 on Oct 13, 2022. It is currently off market. The Trulia Estimate is $3,340,300, with a rent estimate of $7,994/month.

Home Details for 21 Underhill Rd

Exterior Features

Exterior Home Features
Roof: AsphaltDeckExterior: StuccoGardenPatioSprinkler System
Parking & Garage
GarageParking: Garage Attached

Property Information

Year Built
Year Built: 1962Year Updated: 1967
Property Type / Style
Property Type: Single Family HomeArchitecture: Contemporary

Interior Features

Interior Details
Wet Bar
Appliances & Utilities
DishwasherDisposalDryerMicrowaveRefrigeratorWasher
Fireplace & Spa
Fireplace
Levels, Entrance, & Accessibility
Floors: Tile, Hardwood, Linoleum Vinyl

Community

Units in Building: 1

Lot Information

Lot Area: 0.26 acres

Price and Tax history

DateEventPrice
Oct 13, 2022
Source: N/A
Sold
$324,000
May 20, 2016
Source: BAREIS #21608418
Sold
$2,210,000
Apr 19, 2016
Source: Agent Provided
Listed For Sale
$1,895,000

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

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

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

What Locals Say about Scott Valley

At least 4 Trulia users voted on each feature.

  • 100 % Say it's dog friendly

  • 100 % Say there's holiday spirit

  • 100 % Say yards are well-kept

  • 100 % Say it's walkable to grocery stores

  • 100 % Say it's walkable to restaurants

  • 100 % Say parking is easy

  • 100 % Say kids play outside

  • 86 % Say there are community events

  • 83 % Say there are sidewalks

  • 80 % Say they plan to stay for at least 5 years

  • 80 % Say car is needed

  • 80 % Say it's quiet

  • 77 % Say neighbors are friendly

  • 75 % Say there's wildlife

  • 75 % Say people would walk alone at night

  • 50 % Say streets are well-lit

Sourced by Trulia users. Learn more about our methodology.
  • Michael
    "Many open space trail options for dogs (and their owners) including trails with amazing bay views and some that are off-leash."
    0
    Flag
  • Maryann P.
    "Lots of dogs and dog walkers. Most dogs on leash and walkers pick up poop. Lots of open space and coyotes in area so dogs shed not be let out unattended "
    0
    Flag
  • Maryann Pearson
    "Mill Valley is dog heaven Many walking paths and trails Most people control their dogs, and clean up after them"
    0
    Flag
  • Maryann P.
    "Driving into and out of Mill Valley downtown can be difficult during certain times of day. The Scott Valley neighborhood offers options for going north or south during heavy traffic and is closer to 101 than most neighborhoods. "
    0
    Flag
  • Maryann P.
    "I’ve lived here since 1985. beautiful natural surroundings on horse hill, quiet and very convenient location. our HOA owns 60+ acres of open space - horses graze part of it. Hike up Mt Tam from your doorstep Only 39 homes,very friendly neighborhood tho most also very private. All ages, some young kids. Scott Valley swim and tennis next door. Edna Mcguire elementary A few blocks away. We are so lucky to live here. "
    0
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 21 Underhill Rd

  • What is 21 Underhill Rd estimated to be worth?
    Trulia's estimated value for 21 Underhill Rd in Mill Valley, CA is $3,340,300.
  • What is the price history for 21 Underhill Rd?
    21 Underhill Rd in Mill Valley, CA last sold for $324,000 in October 2022.
  • 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.
  • Does 21 Underhill Rd have laundry facilities?
    Yes, 21 Underhill Rd in Mill Valley, CA has in-unit laundry.
  • How big is the lot at 21 Underhill Rd?
    The lot at 21 Underhill Rd in Mill Valley, CA is about 0.26 acres (11,325 sq ft).

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