280 Ralston Ave is a 5,339 square foot house on a 1.18 acre lot with 4 bedrooms and 3.5 bathrooms. - it last sold on November 12, 2019 for $2,485,000. Based on Redfin's Mill Valley data, we estimate the home's value is $4,248,243.
Single-familyProperty Type
1993Year Built
1.18 acresLot Size
$796Est. Price/Sq.Ft.
4 spacesParking
Source:Public Records
Redfin Estimate
$4,248,243
$1.8M since sold in November 2019$200K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 7.9% lower than the average sale price ($4.61M) of 5 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Sep 24, 2025 • Final
Residential plumbing
Replace a gas-fired water heater with a heat pump water heater.
Heat pump
HVAC
Plumbing
Water heater
Apr 23, 2024 • Final
Residential ev charger
Install a new electrical circuit in the garage.
Electrical
Ev charger
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 Type: Central
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Exterior
Exterior Information
Building Construction Quality: Excellent
Property Information
Subdivision Name: TAMALPAIS LAND & WATER CO
Living Sq. Ft: 5,339
Building Sq. Ft: 5,339
# of Units: 1
Parking & Garage Information
Garage/Parking Sq. Ft: 753
Lot Information
# of Buildings: 1
Land Sq. Ft: 51,396
Legal Lot Number: 6
Municipality Name: MILL VALLEY
Acres: 1.1799
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Tax Area: MILL VALLEY
Public facts
Beds: 4
Baths: 3.5
Sq. Ft.: 5,339
Stories: —
Parking Spaces: 4
Basement: Yes
Accessible: Yes
Lot Size: 1.18 acres
Style: Single Family Residential
Year Built: 1993
Year Renovated: 2000
County: Marin County
APN: 027-072-03
HOA Dues: —
Garage: Yes
Features: Views
Home facts updated by owner on Jun 12, 2022
Around this home
Schools
Old Mill Elementary School
Public K-5 • Assigned • 0.8mi
10/10
Mill Valley Middle School
Public 6-8 • Assigned • 2.1mi
9/10
Tamalpais High School
Public 9-12 • Assigned • 2.6mi
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
0.31% chance of being in a wildfire in next 30 years
2/10 Heat Factor
7 days above 83° expected this year, 17 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)
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47
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66
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48
69
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68
53
76
56
74
57
72
55
61
50
56
47
Jan
Feb
Mar
Apr
May
Jun
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Aug
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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
$4.04M – $4.89M
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