17645 Middlefield Rd is a 1,400 square foot house on a 5,000 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on March 29, 2012 for $342,000. Based on Redfin's Sonoma data, we estimate the home's value is $608,508.
Single-familyProperty Type
1922Year Built
5,000 sq ftLot Size
$435Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$608,508
$267K since sold in March 2012$227K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 5.9% lower than the average sale price ($647K) 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 11, 2016 • Final
Building history record
Work on a foundation.
Grading
Jun 11, 2016 • Final
Building permit with plan check
Remodel a single-family home and construct an addition. The project includes a new attached garage and a deck.
Addition
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
Bathroom Information
# of Full Baths: 2
Room Information
# of Rooms: 5
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood/Steel
Building Construction Quality: Average
Property Information
Subdivision Name: SONOMA HLNDS 01
Living Sq. Ft: 1,400
Building Sq. Ft: 1,680
# of Stories: 1
Legal Description: LOT 15 BLK C SONOMA HIGHLANDS
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 280
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 5,000
Legal Lot Number: 15
Legal Block Number: C
Acres: 0.1148
Zoning Code: R15UA
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,400
Stories: 1.0
Lot Size: 5,000 square feet
Style: Single Family Residential
Year Built: 1922
Year Renovated: 2000
County: Sonoma County
APN: 056334003000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Flowery Elementary School
Public K-5 • Assigned • 0.3mi
5/10
Adele Harrison Middle School
Public 6-8 • Assigned • 2.9mi
4/10
Sonoma Valley High School
Public 9-12 • Assigned • 2.7mi
7/10
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
4/10 Fire Factor
2% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 97° expected this year, 16 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
19 unhealthy days expected this year, 19 days in 30 years
Provided by First Street
Historical weather
Sonoma, CA • 95476
Average low and high temperatures (°F)
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89
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86
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80
51
65
46
59
43
Jan
Feb
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Sun exposure
In this area, properties receive around 11.3 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.3 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$579,000 – $700,000
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