17820 Middlefield Rd is a 838 square foot house on a 4,792 square foot lot with 2 bedrooms and 1 bathroom. - it last sold on May 03, 2018 for $409,000. Based on Redfin's Sonoma data, we estimate the home's value is $633,892.
Single-familyProperty Type
1905Year Built
4,792 sq ftLot Size
$756Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$633,892
$225K since sold in May 2018$14K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.6% higher than the average sale price ($579K) 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
Dec 1, 2023 • Final
Building permit no plan check
Install a gas insert.
Gas
Mar 22, 2018 • Final
Building permit no plan check
Replace a double-sided wall furnace with a new unit in a single-family home.
HVAC
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
Heating & Cooling
Heating Type: Wall Furnace
Room Information
# of Rooms: 4
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: U-Shape
Construction Type: Wood/Steel
Building Construction Quality: Poor
Exterior Wall: Wood Siding
Property Information
Subdivision Name: SONOMA HLNDS 01
Living Sq. Ft: 838
Ground Floor Sq. Ft: 838
Building Sq. Ft: 838
# of Stories: 1
Legal Description: LOT 20 BLK C SONOMA HIGHLANDS SUB NO 1
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,792
Legal Lot Number: 20
Legal Block Number: C
Acres: 0.11
Zoning Code: R15UA
County Use Description: SINGLE FAM DWELLING
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.0
Sq. Ft.: 838
Stories: 1.0
Lot Size: 4,792 square feet
Style: Single Family Residential
Year Built: 1905
Year Renovated: 1980
County: Sonoma County
APN: 056334008000
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 • 2.8mi
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)
62
40
64
42
72
46
70
47
78
51
83
54
82
54
89
55
86
56
80
51
65
46
59
43
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
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
$603,000 – $729,000
Reach more buyers when you sell with Redfin. Save up to $6,339 in fees.3 minutes to get started.