New construction modern farmhouse with ADU and expansive level grounds in one of Mill Valley's most desirable locations. 308 Marin Avenue offers a rare blend of design, functionality, and flexibilityideal for today's lifestyle. The property spans approximately 2,599 sq ft (per measurements) and includes a 4BR/2.5BA main residence plus an attached ADU above the garage. The main home features a light-filled kitchen that flows seamlessly into open living spaces and a generous family room, ideal as a media room, playroom, or secondary lounge. A well-appointed pantry and dedicated laundry room add everyday convenience. Large openings create a seamless indoor-outdoor connection to expansive front and rear yards with substantial, level lawn areasan increasingly rare offering in Mill Valleyperfect for entertaining, recreation, or relaxation. The attached ADU provides a fully independent living space, ideal for guests, extended family, a home office, or potential income. Clean lines, warm finishes, and a functional layout define the home's modern farmhouse aesthetic, all just moments from downtown Mill Valley, award-winning schools, and premier outdoor access.
Closed
$3,250,000
308 Marin Avenue, Mill Valley, CA 94941
4beds
2,599sqft
Single Family Residence
Built in ----
6,599 Square Feet Lot
$3,249,300 Zestimate®
$1,250/sqft
$7,817 Estimated rent
Home value
$3,249,300
$2.99M - $3.51M
$7,817/mo
Zestimate® history
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List your homeWhat's special
Warm finishesFunctional layoutClean linesGenerous family roomOpen living spacesExpansive level groundsLight-filled kitchen
Zillow last checked:
Listing updated:
Listed by:
Susan Hewitt DRE #00996144 415-407-8349,
Golden Gate Sotheby's 415-464-9300,
C.J. Nakagawa DRE #01913564 415-407-2151,
Golden Gate Sotheby's
Bought with:
Traci A Thiercof, DRE #01817886
City Real Estate
Source: BAREIS,MLS#: 326031042
Originating MLS: Marin County
Originating MLS: Marin CountyFacts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 4
- Full bathrooms: 3
- 1/2 bathrooms: 1
Primary bedroom
- Level: Upper
Bedroom
- Level: Upper
Bathroom
- Level: Main,Upper
Dining room
- Level: Main
Family room
- Level: Main
Kitchen
- Level: Main
Living room
- Level: Main
Heating
- Ductless, MultiUnits
Cooling
- Ductless, Multi Units
Appliances
- Included: Dryer, Washer
- Laundry: Inside Room
Features
- Basement: None
- Number of fireplaces: 1
- Fireplace features: Electric
Interior area
- Total structure area: 2,599
- Total interior livable area: 2,599 sqft
Property
Parking
- Total spaces: 3
- Parking features: Attached, Garage Faces Front
- Attached garage spaces: 1
- Uncovered spaces: 2
Features
- Levels: Two
- Stories: 2
Lot
- Size: 6,599 Square Feet
- Features: Other
Details
- Parcel number: 05203108
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Farmhouse,Modern/High Tech
- Property subtype: Single Family Residence
- Attached to another structure: Yes
Condition
- New Construction
- New construction: Yes
Utilities & green energy
- Sewer: Sewer in Street
- Water: Water District
- Utilities for property: Cable Available, Electricity Connected, Public
Green energy
- Energy generation: Solar
Community & HOA
HOA
- Has HOA: No
Location
- Region: Mill Valley
Financial & listing details
- Price per square foot: $1,250/sqft
- Tax assessed value: $223,424
- Annual tax amount: $15,361
- Date on market: 4/13/2026
- Electric utility on property: Yes
Price history
| Date | Event | Price |
|---|---|---|
| 5/22/2026 | Sold | $3,250,000+8.5%$1,250/sqft |
Source:  BAREIS #326031042 Report a problem | ||
| 4/28/2026 | Pending sale | $2,995,000$1,152/sqft |
Source: BAREIS #326031042 Report a problem | ||
| 4/13/2026 | Listed for sale | $2,995,000+242.3%$1,152/sqft |
Source: BAREIS #326031042 Report a problem | ||
| 4/1/2025 | Sold | $875,000$337/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $15,361 +149.4% | $223,424 +2% |
| 2024 | $6,158 +14.8% | $219,045 +2% |
| 2023 | $5,365 +3.2% | $214,750 +2% |
| 2022 | $5,198 +2.6% | $210,531 +2% |
| 2021 | $5,067 +5.7% | $206,403 +1% |
| 2020 | $4,795 +4.1% | $204,287 +2% |
| 2019 | $4,605 +8.1% | $200,282 +2% |
| 2018 | $4,261 -9.8% | $196,355 +2% |
| 2017 | $4,725 +18.1% | $192,506 +2% |
| 2016 | $3,999 +6.3% | $188,731 +1.5% |
| 2015 | $3,760 +4.8% | $185,896 +2% |
| 2014 | $3,588 | $182,255 +0.5% |
| 2013 | -- | $181,432 +2% |
| 2012 | -- | $177,875 +2% |
| 2011 | -- | $174,388 +0.8% |
| 2010 | -- | $173,086 -0.2% |
| 2009 | -- | $173,498 +2% |
| 2008 | -- | $170,096 +2% |
| 2007 | -- | $166,761 +2% |
| 2006 | -- | $163,492 +2% |
| 2005 | -- | $160,287 +2% |
| 2004 | -- | $157,144 +1.9% |
| 2003 | -- | $154,265 +2% |
| 2002 | -- | $151,242 +2% |
| 2001 | -- | $148,277 |
Find assessor info on the county website
Neighborhood: Tamalpais Valley
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Nearby schools
GreatSchools rating
- 10/10Tamalpais Valley Elementary SchoolGrades: K-5Distance: 0.2 mi
- 9/10Mill Valley Middle SchoolGrades: 6-8Distance: 1.4 mi
- 10/10Tamalpais High SchoolGrades: 9-12Distance: 0.9 mi
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Estimated market value
$3,249,300
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Estimated market value
$3,249,300
- California
- Marin County
- Mill Valley
- 94941
- Tamalpais Valley
- 308 Marin Avenue
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