457 Ralston Ave is a 748 square foot house on a 0.37 acre lot with 2 bedrooms and 2 bathrooms. Based on Redfin's Mill Valley data, we estimate the home's value is $2,289,939.
Single-familyProperty Type
1955Year Built
0.37 acresLot Size
$3,061Est. Price/Sq.Ft.
2 garage spacesParking
Source:Public Records
Redfin Estimate
$2,289,939
$37K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 13.7% lower than the average sale price ($2.65M) of 4 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Oct 21, 2025 • Final
Residential other re roof
Re-roof a residential building using a flat membrane or tar and gravel system. No re-sheeting is specified.
Roofing
Jan 4, 2021 • Final
Residential plan check
Reconstruct a carport and install new siding on a residential building.
Remodel
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Heating & Cooling
Heating Fuel Type: Gas
Heating Type: Central
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Exterior
Exterior Information
Foundation Type: Raised W/Crawlspace
Building Style Type: Contemporary
Building Construction Quality: Average
Exterior Wall: Wood
Property Information
Subdivision Name: TAMALPAIS LAND & WATER CO
Living Sq. Ft: 748
Building Sq. Ft: 748
# of Units: 1
# of Stories: 1
Parking & Garage Information
# of Parking Spaces: 1
Garage/Parking Sq. Ft: 500
Lot Information
# of Buildings: 1
Land Sq. Ft: 16,000
Legal Lot Number: 20
Municipality Name: MILL VALLEY
Acres: 0.3673
Zoning Code: R-1
County Use Description: 1 FAMILY RESID
Location Information
Parcel Location Influence: Woodland
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Tax Area: MILL VALLEY
Public facts
Beds: 2
Baths: 2.0
Sq. Ft.: 748
Stories: 1.0
Lot Size: 0.37 acres
Style: Single Family Residential
Year Built: 1955
Year Renovated: 1955
County: Marin County
APN: 027-031-13
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Old Mill Elementary School
Public K-5 • Assigned • 1.0mi
10/10
Mill Valley Middle School
Public 6-8 • Assigned • 2.2mi
9/10
Tamalpais High School
Public 9-12 • Assigned • 2.7mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.46% chance of being in a wildfire in next 30 years
2/10 Heat Factor
8 days above 83° expected this year, 18 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
7/10 Air Factor
12 unhealthy days expected this year, 12 days in 30 years
Provided by First Street
Historical weather
Mill Valley, CA • 94941
Average low and high temperatures (°F)
59
47
60
48
66
50
64
48
69
51
69
52
70
54
76
56
73
58
72
55
61
50
56
47
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 10.6 hours in
June and 5 hours in December, placing it above the
U.S. average for solar exposure.
10.6 hrs
5 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$2.18M – $2.63M
Reach more buyers when you sell with Redfin. Save up to $22,899 in fees.3 minutes to get started.