8540 Franz Valley School Rd is a 1,056 square foot house on a 10.3 acre lot with 3 bedrooms and 1 bathroom. - it last sold on July 30, 1974 for $20,000. Based on Redfin's Calistoga data, we estimate the home's value is $876,817.
Single-familyProperty Type
1941Year Built
10.3 acresLot Size
$830Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$876,817
$857K since sold in July 1974$53K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 19.2% lower than the average sale price ($1.08M) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jun 26, 2018 • Final
Building permit no plan check
Electrical
Oct 31, 2017 • Active
Temporary utilities
Install a temporary electrical power pole to provide service for a well.
Electrical
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
Bathroom Information
# of Full Baths: 1
Room Information
# of Rooms: 4
Exterior
Exterior Information
Building Style Type: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Living Sq. Ft: 1,056
Ground Floor Sq. Ft: 1,056
Building Sq. Ft: 1,488
# of Stories: 1
Lot Information
# of Buildings: 1
Land Sq. Ft: 448,668
Acres: 10.3
Zoning Code: DA10
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,056
Stories: 1.0
Lot Size: 10.3 acres
Style: Single Family Residential
Year Built: 1941
Year Renovated: 1941
County: Sonoma County
APN: 120150007000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Calistoga Elementary School
Public K-6 • Assigned • 4.5mi
6/10
Calistoga Junior/Senior High School
Public 7-12 • Assigned • 4.6mi
4/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Historical weather
Calistoga, CA • 94515
Average low and high temperatures (°F)
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75
53
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Sun exposure
In this area, properties receive around 11.4 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.4 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$833,000 – $1.01M
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