399 Marion Ave Mill Valley, CA 94941
Mill Valley Heights NeighborhoodEstimated payment $14,777/month
Highlights
- Built-In Refrigerator
- Midcentury Modern Architecture
- Living Room with Fireplace
- Mill Valley Middle School Rated A
- Deck
- 5-minute walk to Old Mill Park
About This Home
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.
Co-Listing Agent
Jennifer Ames
Engel & Völkers Mill Valley License #01408907
Home Details
Home Type
- Single Family
Year Built
- Built in 1958 | Remodeled
Lot Details
- 11,286 Sq Ft Lot
- Wood Fence
- Wire Fence
- Front Yard Sprinklers
Home Design
- Midcentury Modern Architecture
- Composition Roof
- Shingle Siding
Interior Spaces
- Soaking Tub
- 2-Story Property
- Gas Log Fireplace
- Formal Entry
- Living Room with Fireplace
Kitchen
- Double Oven
- Microwave
- Built-In Refrigerator
- Plumbed For Ice Maker
- Dishwasher
- Wine Refrigerator
- Disposal
Flooring
- Wood
- Stone
- Tile
Laundry
- Laundry closet
- Stacked Washer and Dryer
Parking
- Detached Garage
- 2 Carport Spaces
- No Garage
- Uncovered Parking
Outdoor Features
- Deck
- Outdoor Storage
Utilities
- No Cooling
- Central Heating
- Heating System Uses Gas
- 220 Volts
- Septic System
Map
Home Values in the Area
Average Home Value in this Area
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 | $17,647 | $1,418,364 | $752,338 | $666,026 |
| 2024 | $17,020 | $1,390,560 | $737,590 | $652,970 |
| 2023 | $16,905 | $1,363,299 | $723,130 | $640,169 |
| 2022 | $16,246 | $1,326,766 | $708,952 | $617,814 |
| 2021 | $15,787 | $1,300,759 | $695,055 | $605,704 |
| 2020 | $15,919 | $1,287,429 | $687,933 | $599,496 |
| 2019 | $7,352 | $1,262,196 | $674,450 | $587,746 |
| 2018 | $15,217 | $1,237,456 | $661,230 | $576,226 |
| 2017 | $14,694 | $1,213,197 | $648,267 | $564,930 |
| 2016 | $14,226 | $1,189,409 | $635,556 | $553,853 |
| 2015 | $14,368 | $1,171,551 | $626,014 | $545,537 |
| 2014 | -- | $1,148,605 | $613,753 | $534,852 |
Property History
| Date | Event | Price | List to Sale | Price per Sq Ft |
|---|---|---|---|---|
| 05/15/2026 05/15/26 | Pending | -- | -- | -- |
| 04/24/2026 04/24/26 | For Sale | $2,495,000 | -- | $1,200 / Sq Ft |
Purchase History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Type | Sale Price | Title Company |
|---|---|---|---|
| Quit Claim Deed | -- | Lawyers Title | |
| Interfamily Deed Transfer | -- | None Available | |
| Interfamily Deed Transfer | -- | None Available | |
| Interfamily Deed Transfer | -- | Stewart Title Of California | |
| Grant Deed | $999,000 | Stewart Title Of California | |
| Grant Deed | $1,100,000 | California Land Title Marin | |
| Interfamily Deed Transfer | -- | First American Title Ins Co | |
| Grant Deed | $875,000 | Fidelity National Title Co | |
| Grant Deed | $651,000 | First American Title Co | |
| Quit Claim Deed | -- | Lawyers Title | |
| Grant Deed | $485,000 | Pacific Coast Title Company |
Mortgage History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Status | Loan Amount | Loan Type |
|---|---|---|---|
| Open | $1,633,950 | Reverse Mortgage Home Equity Conversion Mortgage | |
| Previous Owner | $485,000 | New Conventional | |
| Previous Owner | $300,000 | Fannie Mae Freddie Mac | |
| Previous Owner | $900,000 | New Conventional | |
| Previous Owner | $650,000 | Purchase Money Mortgage | |
| Previous Owner | $50,000 | Credit Line Revolving | |
| Previous Owner | $1,633,950 | Reverse Mortgage Home Equity Conversion Mortgage | |
| Previous Owner | $350,000 | No Value Available | |
| Closed | $50,000 | No Value Available |
Source: Bay Area Real Estate Information Services (BAREIS)
MLS Number: 326035268
APN: 028-141-12
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.
Listing information deemed reliable but not guaranteed. Copyright 2026 Bay Area Real Estate Information Services, Inc. All Right Reserved.
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