4645 Sonoma Mountain Rd is a 756 square foot house on a 1 acre lot with 1 bedroom and 1 bathroom. - it last sold on August 30, 2017 for $500,000. Based on Redfin's Santa Rosa data, we estimate the home's value is $702,927.
Single-familyProperty Type
1948Year Built
1 acresLot Size
$930Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$702,927
$203K since sold in August 2017$28K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 3.9% lower than the average sale price ($732K) 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.
Zoning and permits
Zoning
Permits
RR B6 8/5 (AC/DU)/AC MIN
RC 50'
SR
Rural Residential - B6 Combining District
The RR zone preserves the rural character and amenities in areas best utilized for low-density residential development. Rural residential uses are intended to take precedence over agricultural uses. Agricultural service uses are not allowed. The adopted zoning maps shall specify the maximum permitted density, determined by gross acreage for all residential uses. Minimum front, side and rear yard requirements and the minimum parcel or lot size, if not otherwise specified, shall conform to the base district with which the B6 district is combined unless specifically approved otherwise by the planning commission.
Zone overlays
Riparian Corridor Combining Zone
Scenic Resources Combining District
Permitted uses
Include but are not limited to:
Greenhouse / nursery
Livestock production
Agriculture-Other
Housing-Group
Housing-Single unit
Housing-Other
Lodging & hospitality-Other
Timberland
May 3, 2021 • Final
Building permit with plan check
ADU
Remodel
Roofing
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: 3
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Living Sq. Ft: 756
Ground Floor Sq. Ft: 756
Building Sq. Ft: 1,719
# of Stories: 1
Legal Description: TWP 06N RGE 07W SEC 10 QTR SW4
Parking & Garage Information
Garage/Parking Sq. Ft: 180
Lot Information
# of Buildings: 1
Land Sq. Ft: 43,560
Acres: 1
Zoning Code: RR8/5
County Use Description: RURAL RESID-1 RESID
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 756
Stories: 1.0
Lot Size: 1 acres
Style: Single Family Residential
Year Built: 1948
Year Renovated: 1975
County: Sonoma County
APN: 049390003000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Yulupa Elementary School
Public K-3 • Assigned • 4.4mi
8/10
Montgomery High School
Public 9-12 • Assigned • 5.4mi
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
1% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 93° expected this year, 15 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, 20 days in 30 years
Provided by First Street
Historical weather
Santa Rosa, CA • 95404
Average low and high temperatures (°F)
63
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79
51
65
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Jan
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May
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Sun exposure
In this area, properties receive around 11.2 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.2 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$668,000 – $809,000
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