399 Marion Avenue, Mill Valley, CA 94941, Mill Valley, 94941 - 3 bed, 3 bath

399 Marion Avenue, Mill Valley, CA 94941 home-pic-0

399 Marion Avenue

Mill Valley, CA 94941

ACTIVE
CONDITION: EXCELLENT
3Beds
3Baths
2,080Sq Ft
11,286Lot Size

Property Price

LIST PRICE$2,625,000
EST. MARKET VALUE
$2,393,592
9% AboveMARKET VALUE

SUMMARY

Analysis of 399 Marion Avenue, Mill Valley, CA 94941 reveals a property with a current list price of $2,625,000, which is 9% above the estimated $2,393,592 Fair Market Value. Buyers should carefully evaluate the pricing and consider negotiation opportunities. The property maintains a Excellent Condition Rating (95/100), indicating excellent structural integrity and modern finishes throughout. This turnkey property requires minimal updates and is ready for immediate occupancy. Located in a high-demand neighborhood within the Mill Valley Unified School District, this asset is categorized as a low-risk, high-reward acquisition suitable for both Buy-and-Hold Investors and Owner-Occupants willing to undertake light renovation work.

Estimated Market Value

$2,393,592
Based on Realkey algorithm analyzing recent comparable sales in Mill Valley.

Comparable Sales Map

Comparables within 1 miles sold in recently

Address Sold Price BedsBathsSq Ft$/SqftDistance
399 Marion Avenue
Subject
$2,625,000*
List Price
332,080$1,151-
A
351 Laverne Avenue
Sold
$2,475,000332,265$1,0930.5 mi
B
311 Edgewood Avenue
Sold
$2,100,000321,800$1,1670.1 mi
C
20 Palm Way
Sold
$2,582,000432,871$8990.5 mi
D
269 Corte Madera Avenue
Sold
$2,100,000442,200$9550.8 mi
E
316 Rydal Avenue
Pending
$2,395,000
List Price
432,321$1,0320.8 mi

* Subject property listed price vs sold prices of comps.

Condition Analysis

OVERALL CONDITION SCORE

Excellent
TeardownExcellent

Property is new construction or fully renovated.

Although originally built in 1958, the property has undergone extensive high-end renovations that meet modern luxury standards. Key features include a newly renovated spa-style primary bathroom with heated floors and teak detailing, a chef's kitchen with premium stainless steel appliances and granite countertops, and contemporary architectural elements like floor-to-ceiling frameless windows and an open-concept layout. The home is in move-in condition with no signs of deferred maintenance.

PROSSTRENGTHS & OPPORTUNITIES

  • High Available Lot Utilization

    The property has a large lot size, which is more than 4 times of its living area. lot size in square feet = 11286, living area = 2080.

  • Great Schools

    Elementary School: Tamalpais Valley Elementary School (9/10). Middle School: Mill Valley Middle School (9/10).

  • ADU Development Potential

    The property includes two parcels on a street-to-street lot, offering a significant value-add opportunity to construct an ADU with its own separate access from Florence Street.

CONSRISKS & DEFICIENCIES

  • Wooded Lot Maintenance

    The property's setting among towering redwoods and terraced gardens requires consistent maintenance to manage debris and moisture levels inherent to this microclimate.

  • Multi-Level Layout

    Built in 1958, the home’s configuration places bedrooms on a lower level, which may not appeal to buyers looking for single-level living or a more traditional floor plan.

About 399 Marion Avenue

Set among towering redwoods on a quiet Mill Valley street, this one-of-a-kind home offers something rare: the feeling of living in a private forest retreat while staying moments from town, schools, parks, and daily conveniences. Thoughtfully designed with Zen-inspired outdoor spaces, two expansive decks, and treetop views from nearly every room, the home invites a slower, more connected way of living- morning coffee in the trees, family dinners under the canopy, and weekends filled with fresh air and adventure. A welcoming front deck leads into the main living level, where the living, dining, and kitchen spaces flow in an open-concept layout filled with natural light from oversized windows and skylights. The chef's kitchen features granite countertops, custom wood cabinetry, premium stainless appliances, and a generous island for gathering, homework, and casual meals. Rear deck access makes indoor-outdoor entertaining effortless. Downstairs, the private primary suite feels like a true sanctuary, opening to its own secluded deck. The newly renovated spa-style bath includes a deep porcelain soaking tub, heated shower floors, multiple shower heads, custom teak detailing, and a gray water diverter system that can nourish the surrounding redwoods. An additional bedrooms and a full bath complete this level, including a spacious and flexible third bedroom with a built-in office area, custom Murphy bed, generous storage, and floor-to-ceiling frameless windows and doors overlooking the terraced garden. A significant value-add: this property includes two parcels on a street-to-street lot (one APN), creating potential for an ADU with separate Florence Street accessideal for guests, extended family, an au pair suite, home office, or future income opportunity. With direct proximity to the iconic Dipsea Trail stairs, nearby parks, top-rated schools, and vibrant downtown Mill Valley, this home delivers an exceptional blend of privacy, elegance, and everyday livability for families who want both nature and community.

Property Details

Public Facts

Property Type
Single Family Residence
Year Built
1958
Lot Size
11,286 Sq. Ft.

Interior

Total Bedrooms
3
Total Bathrooms
3 (3 Full, 0 Half)

Exterior & Parking

No exterior & parking available.

Utilities & Misc

HOA Fee
$0 / Month

Neighborhood Insights

Mill Valley Unified Schools

Old Mill Elementary School

Grades K-5 • 0.3 mi

8/10

Park Elementary School

Grades PK-5 • 1.1 mi

9/10

Edna Maguire Elementary School

Grades K-5 • 1.6 mi

8/10

Sensitive Facilities

No sensitive facilities data found.

Neighborhood Comparison

FeatureSubjectAverage HomeNeighborhood Ranking (50 Listings)
Beds3.04.0
49%
Baths3.03.0
50%
Square foot2,0802,190
46%
Lot Size11,2868,359
72%
Price$2.62M$2.10M
70%
Price per sq ft$1.3K$1.0K
76%
Built year19581959
50%
HOA$0$0
50%
Days on market19172
1%

Pricing History

Listed for Sale

Feb 16, 2026

$2,625,000

Initial Listing

Sold

Jul 15, 2011

$999,000

Public Record

Sold

Nov 18, 2005

$1,100,000

Public Record

Sold

Aug 1, 2003

$875,000

Public Record

Sold

Aug 28, 1998

$651,000

Public Record

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