NOT LISTED FOR SALE

331 Richardson Way Mill Valley, CA 94941

Tamalpais Valley Neighborhood

Estimated Value: $1,816,000 - $2,490,809

5 Beds
4 Baths
2,395 Sq Ft
$854/Sq Ft Est. Value

Sale Details

Date Sold: January 23, 2025

Last sale price $1,725,000 $720 Per Sq Ft

Est. 19% increase in value since last sale

Current estimated payment $13,378 / mo

99 Days on Market

Highlights

  • 0.46 Acre Lot
  • Mountain View
  • Radiant Floor
  • Mill Valley Middle School Rated A
  • Contemporary Architecture
  • 4-minute walk to Kay Park

About This Home

As of January 2025

Nestled in a serene location in Mill Valley, this duplex home offers breathtaking views of Mount Tam. The property features a spacious three bedroom, two bath main home with abundant windows to capture the stunning scenery. The two bedroom, one bath unit includes a full kitchen and laundry room, ideal for guests or as a rental. There is also a bonus detached studio, showcasing incredible views, with a kitchenette and a remodeled bath. With a one-car attached garage and recent upgrades like a newly installed furnace and mini-split heat pump A/C, this home is both comfortable and efficient. Additional highlights include double-pane windows, recessed lighting, newer gutters and downspouts with fresh paint throughout. Enjoy the heated floors and ceiling fan in the detached office/paint room and unwind on the flagstone patio while watching the sunset over Mount Tamthis property truly embodies the ideal blend of comfort, functionality and natural beauty.

Last Agent to Sell the Property

Britt Johnson

Coldwell Banker Realty License #00985355 Listed on: 09/30/2024

Coldwell Banker Realty

Last Buyer's Agent

Herman Chan

Golden Gate Sotheby's Int'l Re License #01395481

Home Details

Home Type

  • Single Family

Year Built

  • Built in 1935 | Remodeled

Lot Details

  • 20,000 Sq Ft Lot
  • Wood Fence

Parking

  • 1 Car Detached Garage
  • Gravel Driveway
  • Uncovered Parking

Property Views

  • Mountain
  • Mount Tamalpais

Home Design

  • Contemporary Architecture
  • Concrete Foundation
  • Composition Roof
  • Bitumen Roof
  • Wood Siding

Interior Spaces

  • 2,395 Sq Ft Home
  • 1-Story Property
  • Skylights
  • Double Pane Windows
  • Family Room
  • Living Room
  • Formal Dining Room
  • Workshop
  • Laundry in Kitchen

Kitchen

  • Breakfast Area or Nook
  • Free-Standing Gas Range
  • Range Hood
  • Dishwasher

Flooring

  • Radiant Floor
  • Tile
  • Vinyl

Bedrooms and Bathrooms

  • 5 Bedrooms
  • Studio bedroom
  • Bathroom on Main Level
  • 4 Full Bathrooms
  • Tile Bathroom Countertop
  • Separate Shower

Outdoor Features

  • Covered Patio or Porch

Utilities

  • Central Heating and Cooling System
  • Heat Pump System

Listing and Financial Details

  • Assessor Parcel Number 049-171-04

Home Details

Home Type

Single Family

Year Built

Built in 1935 | Remodeled

Lot Details

0.46 Acres

Parking

1

Listing Details

  • Type: Residential
  • Property Sub Type: Single Family Residence
  • Subtype Description: Detached
  • Directions To Property: Right on Marin Ave, Left on Richardson
  • Lot Size Acres: 0.4591
  • Stories: 1
  • Levels: One
  • ArchitecturalStyle: Contemporary
  • Reso Window Features: Dual Pane Full
  • Special Features: None

Interior Features

  • Appliances: Dishwasher, Free Standing Gas Range, Free Standing Refrigerator, Hood Over Range
  • Bedrooms: 5
  • Full Bathrooms: 4
  • Dining Room Features: Formal Area
  • Living Room Features: View
  • Flooring: Tile, Vinyl
  • Square Footage: 2395.00
  • Bathroom Features: Shower Stall(s), Tile
  • Bathrooms: 4
  • Family Room Features: Skylight(s), View
  • Kitchen Features: Breakfast Area
  • Room Type: Dining Room, Family Room, Kitchen, Living Room, Studio, Workshop
  • Main Level: Bedroom(s), Dining Room, Full Bath(s), Garage, Kitchen, Living Room, Primary Bedroom, Street Entrance
  • PrimaryBedroomFeatures: Closet

Exterior Features

  • Construction Materials: Wood Siding
  • Foundation: Concrete Perimeter
  • Lot Features: Landscape Misc
  • Property Condition: Updated/Remodeled
  • Roof: Bitumen, Composition
  • Fencing: Wood
  • Patio And Porch Features: Covered Patio, Uncovered Patio
  • View: Mountains, Mt Tamalpais

Garage/Parking

  • Parking Features: Detached, Uncovered Parking Space
  • Total Parking Spaces: 4.00
  • Garage Spaces: 1.00
  • Driveway/Sidewalks: Gravel, Paved Driveway

Utilities

  • Cooling: Central, Heat Pump
  • Sewer: Public Sewer
  • Utilities: Public
  • Water Source: Public
  • Heating: Central, Radiant Floor, Other
  • Laundry Features: In Kitchen

Lot Info

  • Assessor Parcel Number: 049-171-04
  • Lot Size Sq Ft: 20000.00

Building Info

  • Year Built: 1935

Multi Family

  • Second Unit Kitchen: Yes
  • Second Unit Occupied: No
  • Second Unit Partial Bathrooms: 0
  • Second Unit Type: Attached

Ownership History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Name Owned For Owner Type

Purchase Details

Closed on
Jan 28, 2026
Sold by
Bought by
Current Estimated Value
$2,044,952

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$841,000
Outstanding Balance
$839,378
Interest Rate
6.18%
Mortgage Type
New Conventional
Estimated Equity
$1,205,574

Purchase Details

Listed on
Sep 30, 2024
Closed on
Jan 14, 2025
Sold by
Bought by
Seller's Agent
Britt Johnson
Coldwell Banker Realty
Buyer's Agent
Herman Chan
Golden Gate Sotheby's Int'l Re
List Price
$1,775,000
Sold Price
$1,725,000
Premium/Discount to List
-$50,000
-2.82%
Views
60

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
12.83%
Original Mortgage
$850,000
Interest Rate
6.6%
Mortgage Type
New Conventional

Purchase Details

Listed on
Feb 16, 2023
Closed on
May 2, 2023
Sold by
Bought by
Seller's Agent
Britt Johnson
Coldwell Banker Realty
Buyer's Agent
David Neseralla
Dryden Capital, Inc
List Price
$1,129,537
Sold Price
$1,129,537

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
28.10%
Original Mortgage
$734,500
Interest Rate
6.32%
Mortgage Type
Credit Line Revolving

Purchase Details

Closed on
Dec 19, 2022
Sold by
Bought by

Purchase Details

Closed on
Nov 30, 2012
Sold by
Bought by

Purchase Details

Closed on
Jul 3, 2006
Sold by
Bought by

Purchase Details

Closed on
Jun 24, 2004
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$650,000
Interest Rate
3.68%
Mortgage Type
Purchase Money Mortgage
Source: Public Records

Range of Values:

--
Value Increase
--
Percent Increase
--
Adjusted for Inflation
Collateral Analytics

Collateral Analytics Collateral Analytics AVMs (Automated Valuation Model) employ a number of statistical approaches combined with neighborhood-specific comparable selection guarantees the most up-to-date and precise valuations.

Not Available

Collateral Analytics does not have data for the current month. Please view the chart for historical values.

ICE

ICE Mortgage Technology ICE Mortgage Technology’s AVM (Automated Valuation Model) is a state-of-the-art online residential property valuation tool that provides a quick and accurate estimate of the value of almost any home in the U.S.

Not Available

ICE Mortgage Technology does not have data for the current month. Please view the chart for historical values.

First American

First American First American Data & Analytics’ next-generation AVM combines unrivaled data assets with a blended ensemble of valuation models to produce highly accurate, reliable valuations you can trust.

Not Available

First American does not have data for the current month. Please view the chart for historical values.

Quantarium

Quantarium Quantarium’s valuation service, repeatedly proven the industry’s most accurate and comprehensive, is supercharged with a self-learning and auto-tuning AI engine that continually becomes smarter and more accurate as it processes daily inputs from the industry’s leading RE data lake.

Not Available

Quantarium does not have data for the current month. Please view the chart for historical values.

Average Value
Not Available
List Price
Sold Price
Create a Home Valuation Report for This Property
The Home Valuation Report is an in-depth analysis detailing your home's value as well as a comparison with similar homes in the area

Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Buyer Sale Price Title Company
$202,000 Chicago Title Company
$1,725,000 Old Republic Title
$1,130,000 None Listed On Document
$1,170,504 None Listed On Document
$760,000 Accommodation
-- None Available
$880,000 California Land Title Marin
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Borrower Loan Amount
Open $841,000
Previous Owner $850,000
Previous Owner $734,500
Previous Owner $650,000
Source: Public Records

Property History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Event Price List to Sale Price per Sq Ft Prior Sale
01/23/2025 01/23/25 Sold $1,725,000 -2.8% $720 / Sq Ft
01/07/2025 01/07/25 Pending -- -- --
11/17/2024 11/17/24 For Sale $1,775,000 +2.9% $741 / Sq Ft
11/16/2024 11/16/24 Off Market $1,725,000 -- --
11/12/2024 11/12/24 Price Changed $1,775,000 -6.3% $741 / Sq Ft
09/30/2024 09/30/24 For Sale $1,895,000 +67.8% $791 / Sq Ft
05/11/2023 05/11/23 Sold $1,129,537 0.0% $678 / Sq Ft View Prior Sale
05/08/2023 05/08/23 Pending -- -- --
02/16/2023 02/16/23 For Sale $1,129,537 -- $678 / Sq Ft
Source: Bay Area Real Estate Information Services (BAREIS)

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $27,982 $1,742,670 $1,040,400 $702,270
2024 $27,569 $1,708,500 $1,020,000 $688,500
2023 $25,277 $1,550,000 $1,000,000 $550,000
2022 $21,336 $1,183,829 $946,822 $237,007
2021 $21,679 $1,160,621 $928,260 $232,361
2020 $20,640 $1,148,721 $918,742 $229,979
2019 $20,228 $1,126,206 $900,735 $225,471
2018 $19,230 $1,104,132 $883,080 $221,052
2017 $18,038 $1,067,783 $865,770 $202,013
2016 $16,436 $1,046,849 $848,797 $198,052
2015 $15,996 $1,031,134 $836,055 $195,079
2014 $15,381 $968,000 $770,000 $198,000
Source: Public Records

Agents Affiliated with this Home

  • B

    Seller's Agent in 2025

    Britt Johnson

    Coldwell Banker Realty

    Section Image

  • H

    Buyer's Agent in 2025

    Herman Chan

    Golden Gate Sotheby's Int'l Re

  • D

    Buyer's Agent in 2023

    David Neseralla

    Dryden Capital, Inc

    (415) 444-5308

    1 in this area

    1 Total Sale

    David Neseralla
    Section Image
See All Agents

Map

Source: Bay Area Real Estate Information Services (BAREIS)

MLS Number: 324079266

Bay Area Real Estate Information Services (BAREIS)

APN: 049-171-04

California Marin County Mill Valley 94941 Tamalpais Valley

331 Richardson Way, Mill Valley, CA

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

Bay Area Real Estate Information Services (BAREIS) Listing information deemed reliable but not guaranteed. Copyright 2026 Bay Area Real Estate Information Services, Inc. All Right Reserved.

Nearby Homes
Your Personal Tour Guide

Ask me questions while you tour the home.