140 Walnut Ave
Mill Valley, CA 94941
Sycamore/Tamalpais Park
5 Beds
4 Baths
3,500 sqft
5 Beds
4 Baths
3,500 sqft
Local Information
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Description
Situated on one of the largest lots in Sycamore park, widely considered Mill Valley's premier neighborhood the latest KCS Estates iconic luxury home is a modern take on tradition. This custom built ~3,500 square foot (per architect), 5 bedroom, 4.5 bath home embodies the aesthetic of Modern Traditional design, seamlessly blending the elegance of a traditional home w/ clean lines, open floor plan & stylish finishes. A gracious covered front porch provides a casual outdoor sitting area perfect for catching up with family or neighbors. The elegant great room features a fully equipped chef's kitchen, complete with adjoining pantry/mudroom, open dining area and spacious living space with dual sided custom paneled, honed Statuarietto marble fireplace. The sumptuous master suite features his and hers closets, a spa like bathroom, private office and generous bedroom with sliding doors leading to the private deck with built in spa. The main level also includes an additional guest suite and second living area, complete with kitchen and separate exterior entrance. This flexible space is ideal for long-term guests or an au pair.Upstairs is a junior master with en-suite bath and walk in closet, two additional bedrooms share a bath, along with a separate cozy lounge area and conveniently located laundry room. From the stately front porch to the dual sided fireplace with its outdoor sitting area, this home has been crafted and designed to make full use of the expansive level lot, creating the perfect backdrop for today's active family. French doors beautifully flank the great room fireplace and lead to the trellis-covered loggia with its cozy seating area before spilling onto the flat, sunny lawn. Anchoring the yard a poured in place patio offers ample seating around the fire pit, providing the ideal place to spend a summer evening with friends and family. No detail was spared in the creation of this stunning home. The open, well thought out, floor plan is designed to meet a family's needs through every stage. Traditional and modern design elements fuse seamlessly to create an aesthetic that refuses to be trendy or become outdated. It is the Modern Traditional.
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources.
Home Highlights
Parking
Garage
Outdoor
Porch, Patio, Deck
A/C
Heating & Cooling
HOA
None
Price/Sqft
No Info
Listed
Less than a day ago
Home Details for 140 Walnut Ave
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Interior Details BasementIn-law unitTypes of Rooms: Dining Room, Laundry Room, Master Bath, Office, Pantry |
Heating & Cooling Heating: Forced Air, GasCooling System: OtherHeating Fuel: Forced Air |
Levels, Entrance, & Accessibility Stories: 2Floors: Carpet, Hardwood |
Appliances & Utilities Dishwasher |
Fireplace & Spa FireplaceHot Tub or Spa |
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Exterior Home Features Roof: CompositionDeckExterior: WoodGardenLawnPatioPorch |
Parking & Garage GarageParking Spaces: 2Parking: Garage Detached |
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Year Built Year Built: 2016Year Updated: 2016 |
Property Type / Style Property Type: Single Family HomeArchitecture: Contemporary |
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Furnished |
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Lot Area: 10010 sqft |
Price History for 140 Walnut Ave
| Date | Price | Event | Source |
|---|---|---|---|
| 04/14/2023 | $8,207,000 | Sold | N/A |
| 02/24/2021 | ListingRemoved | N/A | |
| 09/16/2020 | $20,000 | ListingRemoved | N/A |
| 09/11/2020 | $20,000 | Listed For Rent | N/A |
| 12/28/2017 | $4,575,000 | Sold | N/A |
| 07/15/2016 | $4,695,000 | ListingRemoved | Agent Provided |
| 05/21/2016 | $4,695,000 | Listed For Sale | Agent Provided |
| 04/25/2016 | $15,967,719 | Sold | N/A |
| 03/04/2016 | $4,695,000 | Listed For Sale | Agent Provided |
| 01/28/2014 | $1,157,500 | Sold | N/A |
| 01/15/2014 | $1,100,000 | Listed For Sale | Agent Provided |
Market trends in Mill Valley
Last updated April 2026
Avg. sale price
$2.18M $113KMoM
Sale-to-List Price
101.1%
Price per sq ft
$979 $38MoM
Available listings
76 9MoM
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Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $100,502 |
| Assessment | $8,533,360 |
Home facts updated by county records
Comparable Sales for 140 Walnut Ave
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.11 | Single-Family Home | $8,500,000 | 05/04/26 | 6 | 5.5 | 3,720 | |
0.21 | Single-Family Home | $6,300,000 | 08/15/25 | 4 | 4.5 | 3,206 | |
0.12 | Single-Family Home | $3,525,000 | 05/22/26 | 4 | 2.5 | 2,753 | |
0.20 | Single-Family Home | $9,000,000 | 04/01/26 | 6 | 5.5 | 4,480 | |
0.12 | Single-Family Home | $5,850,000 | 05/22/26 | 3 | 3 | 2,292 | |
0.26 | Single-Family Home | $5,400,000 | 04/28/26 | 4 | 3 | 3,778 | |
0.31 | Single-Family Home | $5,625,000 | 02/13/26 | 4 | 4 | 3,716 | |
0.06 | Single-Family Home | $4,200,000 | 11/05/25 | 3 | 3 | 2,298 | |
0.45 | Single-Family Home | $4,695,000 | 07/21/25 | 5 | 5 | 4,330 | |
0.14 | Single-Family Home | $2,400,000 | 07/08/25 | 5 | 3 | 2,235 |
Nearby homes
Get a sense of prices in the area by checking nearby homes.
OFF MARKETColdwell Banker Realty- OFF MARKETSandy Onken Fiek DRE #01365123, Compass
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SOLDNOV 5, 2025Outpost Real Estate
SOLDMAY 4, 2026Serhant California, Inc.
SOLDMAY 22, 2026Sotheby's International Realty
Assigned Schools
These are the assigned schools for 140 Walnut Ave.
- Mill Valley Middle School
- 6-8
- Public
- 721 Students
9/10GreatSchools RatingParent Rating AverageDo not send your children here, I was at this school for all my middle school years and before it I had no mental health issues but afterwards my depression was so horrible I got extremely far behind in classes. I along with my parents requested an IEP for years with the administration refusing every time until my 8th grade year which then improved my grades so much more. Overall the administration does nothing to reduce the bullying at this school or enforce their rules the only good part of this school is most of the teachers who are wonderful yet most lack the correct attitude and understanding of how to treat children.Other Review1mo ago - Old Mill Elementary School
- K-5
- Public
- 261 Students
10/10GreatSchools RatingParent Rating AverageI wish I could write a five star review. I would only give credit to those hard-working teachers unfortunately our experience at the school has not been very positive. There is a huge problem with bullies at the school and I feel like there isn’t anything being done about it if a child has a special need and requires a combination the school will deny an aide for your childParent Review4mo ago - Park Elementary School
- K-5
- Public
- 301 Students
10/10GreatSchools RatingParent Rating AverageI bought my home in 1993 in Mill Valley because I Heard that the Public schools in Mill Valley were fabulous. I am a single mother and have raised two beautiful daughters in this community. We chose Park school mainly because it was closest to our house however, I have to say that it was a phenomenal choice!I have nothing but fantastic things to say about the teachers and their devotion to the job! My children are both grown now and found their ways into their dream colleges. Bravo! Park Scool!!Parent Review9y ago - Tamalpais Valley Elementary School
- K-5
- Public
- 368 Students
10/10GreatSchools RatingParent Rating AverageWonderful, I couldn’t imagine a more positive educational experience for my children. Strong commitment to global learning and the arts: choir, orchestra, dance and top notch art program.Parent Review8y ago - Strawberry Point Elementary School
- K-5
- Public
- 259 Students
10/10GreatSchools RatingParent Rating AverageGreat school with exceptional teachers and administrators. The PTA is very active and events to focused on building an inclusive community.Parent Review2y ago - Edna Maguire Elementary School
- K-5
- Public
- 399 Students
10/10GreatSchools RatingParent Rating AverageWe have had kids at Edna for 9 years. It is a warm, loving place with a very engaged parent community. Kids have access during the schooldays to art, outdoor education, music, and much more. There are tons of extracurricular activities available on campus after school, which is a really lovely addition to the school experience. The administration is responsive and caring.Parent Review1y ago - Tamalpais High School
- 9-12
- Public
- 1470 Students
10/10GreatSchools RatingParent Rating AverageI’m a student at Tam, and I think the campus is beautiful! It honestly looks like a university campus. The architecture is absolutely stunning.This school honestly has some great teachers and courses that make me excited to learn. I feel like there are many options for electives and clubs here.Also, the environment of the school is pretty inclusive. There are many students from different backgrounds, and it seems that we fight back against inequalities.This school also is very flexible, and most staff are kind. Most of my teachers have helped me with accommodations.Student Review1y ago 
Check out schools near 140 Walnut Ave.
Neighborhood Overview
Neighborhood stats provided by third party data sources.
What Locals Say about Sycamore/Tamalpais Park
At least 15 Trulia users voted on each feature.
100 % Say parking is easy
100 % Say it's dog friendly
96 % Say it's walkable to restaurants
95 % Say there's wildlife
95 % Say it's walkable to grocery stores
94 % Say there are sidewalks
88 % Say people would walk alone at night
87 % Say kids play outside
85 % Say car is needed
78 % Say there's holiday spirit
74 % Say yards are well-kept
71 % Say they plan to stay for at least 5 years
71 % Say neighbors are friendly
58 % Say it's quiet
48 % Say there are community events
39 % Say streets are well-lit
Sourced by Trulia users. Learn more about our methodology.
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140 Walnut Ave, Mill Valley, CA 94941 is a 5 bedroom, 4 bathroom, 3,500 sqft single-family home built in 2016. 140 Walnut Ave is located in Sycamore/Tamalpais Park, Mill Valley. This property is not currently available for sale. 140 Walnut Ave was last sold on Apr 14, 2023 for $8,207,000. The current Trulia Estimate for 140 Walnut Ave is $8,663,000.