131 Underhill Rd is a 4,428 square foot house on a 0.35 acre lot with 4 bedrooms and 5 bathrooms. - it last sold on August 02, 2013 for $2,565,000. Based on Redfin's Mill Valley data, we estimate the home's value is $4,723,571.
Single-familyProperty Type
1985Year Built
0.35 acresLot Size
$1,067Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$4,723,571
$2.2M since sold in August 2013$161K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 40.2% higher than the average sale price ($3.37M) 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.
Zoning and permits
Zoning
Permits
R-P
Planned Residential District
The purpose of this chapter is to effect the development of attractive residential properties in keeping with the character of the community with minimum disturbance to the quality of the neighborhoods and of the natural features of the landscape by requiring the approval of specific plans showing site design and overall design character prior to development.; In establishing R-P districts, the City of Mill Valley intends to make possible development in which the size and shape of buildings, building heights, and the open spaces surrounding buildings or groups of buildings may be varied. Density shall be set at a level or range of dwelling units which is consistent with limitations imposed by on-site, natural resource, topographic and geologic conditions and by the level of public services and road access that can be reasonably provided. The development approval process for R-P districts is intended to allow for continuous refinement of the permitted density as additional information is acquired regarding the capacity of the land.
Permitted uses
Include but are not limited to:
Agriculture
Housing-Single unit
May 15, 2023 • Final
Residential plan check
Repair a residential deck.
Remodel
Feb 27, 2023 • Final
Residential plan check
Work on an as-built retaining wall and fence for a residential property.
Grading
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: 3
Has Fireplace
Exterior
Exterior Information
Building Style Type: Contemporary
Building Construction Quality: Excellent
Property Information
Subdivision Name: SCOTT VLY MDWS
Living Sq. Ft: 4,428
Building Sq. Ft: 4,428
# of Units: 1
Legal Description: MAP 18 PG 71 LOT 23
Parking & Garage Information
Garage/Parking Sq. Ft: 456
Lot Information
# of Buildings: 1
Land Sq. Ft: 15,200
Legal Lot Number: 23
Municipality Name: MILL VALLEY
Acres: 0.3489
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Tax Area: MILL VALLEY
Public facts
Beds: 4
Baths: 5.0
Sq. Ft.: 4,428
Stories: —
Lot Size: 0.35 acres
Style: Single Family Residential
Year Built: 1985
Year Renovated: 1998
County: Marin County
APN: 033-210-19
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Edna Maguire Elementary School
Public K-5 • Assigned • 0.5mi
10/10
Mill Valley Middle School
Public 6-8 • Assigned • 1.3mi
9/10
Tamalpais High School
Public 9-12 • Assigned • 1.7mi
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
0.15% 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
8/10 Air Factor
13 unhealthy days expected this year, 13 days in 30 years
Provided by First Street
Historical weather
Mill Valley, CA • 94941
Average low and high temperatures (°F)
59
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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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
$4.49M – $5.43M
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