18 Tanfield Rd is a 3,125 square foot house on a 1 acre lot with 3 bedrooms and 4 bathrooms. - it last sold on July 11, 2007 for $3,150,000. Based on Redfin's Tiburon data, we estimate the home's value is $4,960,321.
Single-familyProperty Type
1962Year Built
1 acresLot Size
$1,587Est. Price/Sq.Ft.
2 spacesParking
Source:Public Records
Redfin Estimate
$4,960,321
$1.8M since sold in July 2007$18K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 37.4% higher than the average sale price ($3.61M) 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-1
Residential Open 1 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
Sep 6, 2025 • Final
Misc electrical
Upgrade the main electrical panel and install a new subpanel for an accessory dwelling unit.
ADU
Electrical
Aug 25, 2025 • Final
Building residential
Install a gate, fence, trellis, and garbage enclosure.
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
# of Fireplaces: 1
Has Fireplace
Exterior
Exterior Information
Building Style Type: Contemporary
Building Construction Quality: Good
Property Information
Subdivision Name: TIBURON PROPERTIES
Living Sq. Ft: 3,125
Building Sq. Ft: 3,125
# of Units: 1
Parking & Garage Information
Garage/Parking Sq. Ft: 380
Lot Information
# of Buildings: 1
Land Sq. Ft: 43,560
Legal Lot Number: 6
Municipality Name: TIBURON
Acres: 1
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Tax Area: TIBURON
Public facts
Beds: 3
Baths: 4.0
Sq. Ft.: 3,125
Stories: —
Lot Size: 1 acres
Style: Single Family Residential
Year Built: 1962
Year Renovated: 1997
County: Marin County
APN: 039-081-04
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Bel Aire Elementary School
Public 3-5 • Assigned • 1.1mi
10/10
Del Mar Middle School
Public 6-8 • Assigned • 0.5mi
10/10
Redwood High School
Public 9-12 • Assigned • 3.6mi
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
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
2/10 Heat Factor
7 days above 83° expected this year, 15 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
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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
$4.71M – $5.71M
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