20 Seafirth Rd is a 2,944 square foot house on a 0.32 acre lot with 4 bedrooms and 4 bathrooms. - it last sold on March 30, 2011 for $919,000. Based on Redfin's Tiburon data, we estimate the home's value is $3,922,040.
Single-familyProperty Type
1956Year Built
0.32 acresLot Size
$1,332Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$3,922,040
$3.0M since sold in March 2011$247K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9% lower than the average sale price ($4.31M) 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.
Zoning and permits
Zoning
Permits
RO-2
Residential Open 2 Zone
The RO zone is intended to promote and encourage the maintenance of a suitable environment for low-density, single-family development on lots larger than those typically found in the R-1 zone.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Senior
Housing-Other
Park & open space
Jun 20, 2023 • Final
Encroachment
Replace a crossarm on a utility pole.
Electrical
Jun 16, 2016 • Final
Building residential
Work on a deck, stairs, and patio.
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
Basement Information
Basement Sq. Ft: 52
Basement Type: Unfinished
Heating & Cooling
Heating Type: Central
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Exterior
Exterior Information
Building Style Type: Contemporary
Building Construction Quality: Good
Property Information
Subdivision Name: SEAFIRTH
Living Sq. Ft: 2,944
Building Sq. Ft: 2,996
# of Units: 1
Parking & Garage Information
Garage/Parking Sq. Ft: 635
Lot Information
# of Buildings: 1
Land Sq. Ft: 13,800
Legal Lot Number: 4
Municipality Name: TIBURON
Acres: 0.3168
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Tax Area: TIBURON
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 2,944
Stories: —
Lot Size: 0.32 acres
Style: Single Family Residential
Year Built: 1956
Year Renovated: 2000
County: Marin County
APN: 039-092-15
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Bel Aire Elementary School
Public 3-5 • Assigned • 1.3mi
10/10
Del Mar Middle School
Public 6-8 • Assigned • 0.7mi
10/10
Redwood High School
Public 9-12 • Assigned • 3.8mi
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
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
3/10 Heat Factor
7 days above 83° expected this year, 16 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
Tiburon, CA • 94920
Average low and high temperatures (°F)
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70
57
61
51
56
48
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Sun exposure
In this area, properties receive around 10.8 hours in
June and 5 hours in December, placing it above the
U.S. average for solar exposure.
10.8 hrs
5 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$3.73M – $4.51M
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