$9,750,000

2 Upper Alcatraz Place Mill Valley, CA 94941

Blithedale Canyon Neighborhood

Estimated payment $55,484/month

Total Views 7,016
5 Beds
5.5 Baths
4,129 Sq Ft
$2,361 Price per Sq Ft

Highlights

  • Solar Power System
  • Private Lot
  • 2 Car Attached Garage
  • Mill Valley Middle School Rated A
  • 1 Fireplace
  • Living Room

About This Home

A groundbreaking Net Zero certified compound just minutes from downtown Mill Valley, 2 Upper Alcatraz Place blends cutting-edge sustainability with stunning architecture and sweeping views from Mt. Tam to the San Francisco skyline. This estate features a 3,610 sq ft all-electric main residence and a 519 sq ft legal ADU with private entry, full kitchen, and terrace. Highlights include wide plank oak floors, floor-to-ceiling glass, Control4 smart home integration, a penthouse-level primary suite, 505 sq ft view terrace, and a rooftop lawn and integrated sound throughout. Solar-powered with battery back up, a home built for future-forward living, this is Mill Valley luxury reimagined.

Listing Agent

Lisa Smith

Engel & Völkers Mill Valley License #01927676 Listed on: 08/11/2025

Engel & Völkers Mill Valley

Co-Listing Agent

Joshua Deitch

Coldwell Banker Realty License #01902477

Home Details

Home Type

  • Single Family

Est. Annual Taxes

  • $47,923

Year Built

  • Built in 2021

Lot Details

  • 0.3 Acre Lot
  • Street terminates at a dead end
  • Artificial Turf
  • Private Lot

Parking

  • 2 Car Attached Garage

Interior Spaces

  • 4,129 Sq Ft Home
  • 3-Story Property
  • 1 Fireplace
  • Family Room
  • Living Room
  • Dining Room
  • Stacked Washer and Dryer

Bedrooms and Bathrooms

  • 5 Bedrooms
  • Primary Bedroom Upstairs
  • Bathroom on Main Level

Additional Features

  • Solar Power System
  • Central Heating and Cooling System

Listing and Financial Details

  • Assessor Parcel Number 029-093-01

Home Details

Home Type

Single Family

Est. Annual Taxes

$47,923

Year Built

Built in 2021

Lot Details

0

Parking

2

Listing Details

  • Type: Residential
  • Property Sub Type: Single Family Residence
  • Subtype Description: Detached
  • Directions To Property: Throckmorton, Rt Old Mill, Lft Lovell, Rt Summit, Rt Upper Alcatraz
  • Lot Size Acres: 0.2984
  • Stories: 3
  • Special Features: None

Interior Features

  • Number Of Fireplaces: 1
  • Bedrooms: 5
  • Half Bathrooms: 1
  • Full Bathrooms: 5
  • Square Footage: 4129.00
  • Bathrooms: 6
  • Fireplace Features: Other
  • Main Level: Dining Room, Family Room, Garage, Kitchen, Living Room, Partial Bath(s), Street Entrance

Exterior Features

  • Lot Features: Dead End, Grass Artificial, Private

Garage/Parking

  • Parking Features: Attached
  • Total Parking Spaces: 3.00
  • Garage Spaces: 2.00

Utilities

  • Cooling: Central
  • Sewer: Public Sewer
  • Utilities: Solar
  • Water Source: Public
  • Heating: Central
  • Laundry Features: Washer/Dryer Stacked Included

Lot Info

  • Assessor Parcel Number: 029-093-01
  • Lot Size Sq Ft: 12998.00

Building Info

  • Year Built: 2021

Multi Family

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

Map

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

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 $47,923 $3,960,941 $1,314,218 $2,646,723
2024 $47,923 $3,883,301 $1,288,456 $2,594,845
2023 $47,107 $3,807,158 $1,263,192 $2,543,966
2022 $44,385 $3,732,510 $1,238,426 $2,494,084
2021 $16,857 $1,232,857 $1,214,147 $18,710
2020 $16,693 $1,220,221 $1,201,702 $18,519
2019 $15,759 $1,196,304 $1,178,148 $18,156
2018 $26,925 $1,988,848 $1,155,048 $833,800
2017 $5,414 $190,093 $74,450 $115,643
2016 $2,878 $186,366 $72,990 $113,376
2015 $3,411 $183,567 $71,894 $111,673
2014 $3,121 $179,971 $70,485 $109,486
Source: Public Records

Property History

Date Event Price List to Sale Price per Sq Ft
08/11/2025 08/11/25 For Sale $9,750,000 -- $2,361 / Sq Ft
Source: Bay Area Real Estate Information Services (BAREIS)

Purchase History

Date Type Sale Price Title Company
Deed $1,954,000 Old Republic Title Co
Source: Public Records

Source: Bay Area Real Estate Information Services (BAREIS)

MLS Number: 325072653

Bay Area Real Estate Information Services (BAREIS)

APN: 029-093-01

California Marin County Mill Valley 94941 Blithedale Canyon

2 Upper Alcatraz Place, Mill Valley, CA

For Sale

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 2025 Bay Area Real Estate Information Services, Inc. All Right Reserved.

Nearby Homes
Listing Agent
Lisa Smith
Section Image
Engel & Völkers Mill Valley
(415) 980-8759