21 Forrest St is a 1,169 square foot house on a 3,060 square foot lot with 2 bedrooms and 3 bathrooms. - it last sold on February 04, 2005 for $915,000. Based on Redfin's Mill Valley data, we estimate the home's value is $1,935,118.
Single-familyProperty Type
1912Year Built
3,060 sq ftLot Size
$1,655Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,935,118
$1.0M since sold in February 2005$178K since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 29.9% lower than the average sale price ($2.76M) 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
RM-3.5
Multiple-Family Residential District
The multi-family residential zones are intended to create and maintain medium and higher density residential neighborhoods that blend a range of housing types with a mix of unit sizes with a limited mix of neighborhood-scale commercial, office, and institutional uses. The City's goals include preservation of the existing stock of rental housing in these areas and provision of opportunities for development of new multi-family housing that increase the diversity of housing options within the City.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Multiple units
Dec 13, 2014 • Final
Residential plan check
Replace the bottom guardrail posts at an existing entry staircase.
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 Type: Central
Fireplace Information
Has Fireplace
Exterior
Exterior Information
Building Style Type: Contemporary
Building Construction Quality: Good
Property Information
Subdivision Name: LYON & HOAGS
Living Sq. Ft: 1,169
Building Sq. Ft: 1,169
# of Units: 1
Legal Description: MAP D3 606
Parking & Garage Information
Garage/Parking Sq. Ft: 612
Lot Information
# of Buildings: 1
Land Sq. Ft: 3,060
Legal Lot Number: 12
Legal Block Number: B
Municipality Name: MILL VALLEY
Acres: 0.0702
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Tax Area: MILL VALLEY
Public facts
Beds: 2
Baths: 3.0
Sq. Ft.: 1,169
Stories: —
Lot Size: 3,060 square feet
Style: Single Family Residential
Year Built: 1912
Year Renovated: 1953
County: Marin County
APN: 028-065-08
Home facts updated by county records on Oct 19, 2026
Around this home
Schools
Old Mill Elementary School
Public K-5 • Assigned • 0.4mi
10/10
Mill Valley Middle School
Public 6-8 • Assigned • 1.1mi
9/10
Tamalpais High School
Public 9-12 • Assigned • 1.5mi
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
2/10 Fire Factor
0.00% chance of being in a wildfire in next 30 years
3/10 Heat Factor
9 days above 83° expected this year, 20 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
60
48
66
50
64
48
69
51
69
52
70
54
76
56
73
58
68
54
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
$1.84M – $2.23M
Reach more buyers when you sell with Redfin. Save up to $19,351 in fees.3 minutes to get started.