26 Circle Avenue

• Sat Aug 22, 1:00 pm - 4:00 pm

• Sun Aug 23, 1:00 pm - 4:00 pm

Welcome to 26 Circle Avenue, one of Mill Valley's most recognized and beloved homes. Long known among locals as the castle house, this remarkable property occupies a rare street to street lot stretching from Circle Avenue to Oakdale, right where Buena Vista meets Oakdale in one of the town's most desirable pockets. This legal duplex offers exceptional flexibility, with 5 bedrooms and 3 bathrooms spread across more than 3,100 square feet of living space. Whether used as a multi-generational residence, an income-producing investment, or a spacious owner-occupied retreat, the layout provides options that are increasingly hard to find in Mill Valley's tightly held market. Cared for by the same family for decades, the home carries a warmth and character that only comes with time. Its distinctive architecture and enduring presence have made it a true neighborhood landmark, and it now presents a rare opportunity for a new owner to bring their own vision to a property with unmatched history. Just blocks from Downtown Mill Valley, Boyle Park, Mill Valley Golf Course and hiking trails, 26 Circle Avenue places shops, restaurants, and open space all within easy reach. Few properties offer this combination of privacy, walkability, and access to everything that makes Mill Valley special. 26 CircleAvenue is more than a home. It is a piece of Mill Valley's fabric, ready for its next chapter.

Days on Market

2 days

Current Status

Active

Original Price

$1,700,000

List Price

$1,700,000

On Market Date

Aug 18, 2026

Property Type

Single Family Residence

Area

Mill Valley

Zip Code

94941

MLS ID

326070325

APN

029-125-23

Year Built

1916

Stories in Building

Unavailable

Possession

Close Of Escrow, Seller Rent Back

Data Source

BAREIS

Origin MLS System

Bed

5

Bath

3

Parking

1

Detached, Garage Facing Front

SQ FT

3,163

SQ FT Source

Graphic Artist

Lot SQ FT

4,940.0

Lot Acres

0.1134 Acres

Cooling

None

Fire Place

Living Room

Heating

Central, Wall Furnace

Laundry

Dryer Included, Washer Included

Upper Level

Bedroom(s), Full Bath(s), Kitchen, Living Room, Street Entrance

Main Level

Bedroom(s), Full Bath(s), Kitchen, Living Room, Street Entrance

Possession

Close Of Escrow, Seller Rent Back

Basement

Partial

Fee

$0

MLS and other Information regarding properties for sale as shown in Theo have been obtained from various sources such as sellers, public records, agents and other third parties. This information may relate to the condition of the property, permitted or unpermitted uses, zoning, square footage, lot size/acreage or other matters affecting value or desirability. Unless otherwise indicated in writing, neither brokers, agents nor Theo have verified, or will verify, such information. If any such information is important to buyer in determining whether to buy, the price to pay or intended use of the property, buyer is urged to conduct their own investigation with qualified professionals, satisfy themselves with respect to that information, and to rely solely on the results of that investigation.

School data provided by GreatSchools. School service boundaries are intended to be used as reference only. To verify enrollment eligibility for a property, contact the school directly.