12 Shell Rd
Mill Valley, CA 94941
Alto- 4 Beds
- 3 Baths
- 2,879 sqft
4 Beds
3 Baths
2,879 sqft
Local Information
-- mins to
Home Highlights
Property Type
Single-Family Home
Year Built
1939
Living Area
2,879 sqft
Price/Sqft
$1,182
About this House
This single-family home is located at 12 Shell Rd, Mill Valley, CA. 12 Shell Rd is in the Alto neighborhood in Mill Valley, CA and in ZIP code 94941. This property has 4 bedrooms, 3 bathrooms and approximately 2,879 sqft of floor space. This property has a lot size of 8699 sqft and was built in 1939.
Home Details for 12 Shell Rd
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Heating & Cooling Heating: OtherHeating Fuel: Other |
Levels, Entrance, & Accessibility Stories: 1 |
Interior Details Number of Rooms: 5Types of Rooms: Dining Room |
Fireplace & Spa Fireplace |
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Exterior Home Features Roof: CompositionExterior: Other |
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Year Built Year Built: 1939Year Updated: 1974 |
Property Type / Style Property Type: Single Family HomeArchitecture: Contemporary |
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Units in Building: 2 |
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Lot Area: 8698 sqft |
Price History for 12 Shell Rd
| Date | Price | Event | Source |
|---|---|---|---|
| 09/19/2018 | $1,700,000 | Sold | BAREIS #21822011 |
| 08/22/2018 | $1,749,000 | Listed For Sale | Agent Provided |
| 09/26/2002 | $630,000 | Sold | N/A |
| 05/28/1999 | $630,000 | Sold | N/A |
| 09/29/1995 | $489,000 | Sold | N/A |
Market trends in Mill Valley
Last updated June 2026
Avg. sale price
$2.4M
$295KMoM
Sale-to-List Price
108.3%
3.0%MoM
Price per sq ft
$1.08K
$70MoM
Available listings
54
25MoM
Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $32,894 |
| Assessment | $2,381,350 |
Home facts updated by county records
Comparable Sales for 12 Shell Rd
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.06 | Single-Family Home | $1,620,000 | 09/17/25 | 3 | 2 | 1,347 | |
0.41 | Single-Family Home | $2,507,000 | 03/24/26 | 4 | 3 | 2,337 | |
0.02 | Single-Family Home | $2,505,000 | 10/07/25 | 3 | 1.5 | 1,735 | |
0.48 | Single-Family Home | $2,805,000 | 04/14/26 | 5 | 3 | 2,490 | |
0.58 | Single-Family Home | $1,998,000 | 11/04/25 | 4 | 3 | 1,997 | |
0.65 | Single-Family Home | $2,300,000 | 06/25/26 | 4 | 3 | 3,066 | |
0.66 | Single-Family Home | $2,255,000 | 07/22/26 | 4 | 3 | 2,880 | |
0.55 | Single-Family Home | $2,500,000 | 04/09/26 | 4 | 3 | 2,190 | |
0.58 | Single-Family Home | $2,550,000 | 04/20/26 | 4 | 2.5 | 2,515 | |
0.58 | Single-Family Home | $2,910,000 | 04/24/26 | 3 | 2.5 | 2,875 |
Nearby homes
Get a sense of prices in the area by checking nearby homes.Assigned Schools
These are the assigned schools for 12 Shell Rd.
What Locals Say about Alto
At least 1 Trulia users voted on each feature.
100 % Say it's dog friendly
100 % Say they plan to stay for at least 5 years
100 % Say there's holiday spirit
100 % Say it's walkable to grocery stores
100 % Say parking is easy
100 % Say neighbors are friendly
50 % Say it's quiet
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections
Apartments for Rent
Homes for sale near 12 Shell Rd
Off Market Homes Near 12 Shell Rd
Frequently asked questions about 12 Shell Rd
- What is 12 Shell Rd estimated to be worth?Trulia's estimated value for 12 Shell Rd in Mill Valley, CA is $3,402,700.
- What is the price history for 12 Shell Rd?12 Shell Rd in Mill Valley, CA last sold for $1,700,000 in September 2018.
- Is Mill Valley a buyer's or seller's market?Mill Valley is currently a seller's market, based on recent for-sale activity.
- What's the median sale price in Mill Valley?The median sale price in Mill Valley is $2.4M. That is up $295K from the prior month.
- How big is the lot at 12 Shell Rd?The lot at 12 Shell Rd in Mill Valley, CA is about 0.20 acres (8,699 sq ft).

