NOT LISTED FOR SALE

21 Monte Vista Ave Mill Valley, CA 94941

Mill Valley Heights Neighborhood

Estimated Value: $2,125,000 - $2,998,699

5 Beds
5 Baths
3,101 Sq Ft
$817/Sq Ft Est. Value

About This Home

This home is located at 21 Monte Vista Ave, Mill Valley, CA 94941 and is currently estimated at $2,532,675, approximately $816 per square foot. 21 Monte Vista Ave is a home located in Marin County with nearby schools including Mill Valley Middle School, Tamalpais High School, and Marin Horizon School.

Ownership History

Date Name Owned For Owner Type

Purchase Details

Closed on
Jul 25, 2025
Sold by
Spellberg Geoffrey
Bought by
Geoffrey Spellberg Trust and Spellberg
Current Estimated Value
$2,532,675

Purchase Details

Closed on
Jun 8, 2020
Sold by
Nguyen Giau Thi Ngoc
Bought by
Spellberg Geoffrey

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$615,000
Interest Rate
3.2%
Mortgage Type
New Conventional

Purchase Details

Closed on
Sep 22, 2015
Sold by
Nguyen Giau Thi Ngoc
Bought by
Spellberg Geoffrey

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$667,000
Interest Rate
3.5%
Mortgage Type
Adjustable Rate Mortgage/ARM

Purchase Details

Closed on
Apr 27, 2007
Sold by
Spellberg Geoffrey
Bought by
Spellberg Geoff

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$900,000
Interest Rate
6.15%
Mortgage Type
Purchase Money Mortgage

Purchase Details

Closed on
Nov 2, 2000
Sold by
Moscicki Anna Barbara
Bought by
Spellberg Geoffrey

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$555,000
Interest Rate
7.75%

Purchase Details

Closed on
Oct 10, 2000
Sold by
Moscicki Anna Barbara
Bought by
Spellberg Geoffrey

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$555,000
Interest Rate
7.75%

Purchase Details

Closed on
Oct 6, 2000
Sold by
Shirakura Dwayne T
Bought by
Barkowitz Pamela

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$555,000
Interest Rate
7.75%
Source: Public Records

Range of Values:

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

Date Buyer Sale Price Title Company
Geoffrey Spellberg Trust -- None Listed On Document
Spellberg Geoffrey -- North American Title Co Inc
Spellberg Geoffrey -- Fidelity National Title Co
Spellberg Geoff -- First American Title Co
Spellberg Geoffrey -- --
Spellberg Geoffrey -- Fidelity National Title Co
Barkowitz Pamela -- Fidelity National Title Co
Source: Public Records

Mortgage History

Date Status Borrower Loan Amount
Previous Owner Spellberg Geoffrey $615,000
Previous Owner Spellberg Geoffrey $667,000
Previous Owner Spellberg Geoff $900,000
Previous Owner Spellberg Geoffrey $555,000
Source: Public Records

Tax History Compared to Growth

Source: Public Records

Tax History

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 $19,248 $1,433,846 $712,414 $721,432
2024 $19,248 $1,405,734 $698,446 $707,288
2023 $19,594 $1,378,172 $684,752 $693,420
2022 $18,070 $1,351,150 $671,326 $679,824
2021 $18,022 $1,324,660 $658,164 $666,496
2020 $19,510 $1,311,082 $651,418 $659,664
2019 $17,751 $1,285,379 $638,647 $646,732
2018 $16,544 $1,260,178 $626,126 $634,052
2017 $16,214 $1,235,469 $613,849 $621,620
2016 $15,412 $1,211,246 $601,814 $609,432
2015 $15,673 $1,193,056 $592,776 $600,280
2014 $16,168 $1,169,691 $581,167 $588,524
Source: Public Records

Map

California Marin County Mill Valley 94941 Mill Valley Heights

21 Monte Vista Ave, 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.

Nearby Homes