1850 Happy Valley Rd is a 3,395 square foot house on a 0.54 acre lot with 4 bedrooms and 3 bathrooms. - it last sold on December 15, 2016 for $975,000. Based on Redfin's Santa Rosa data, we estimate the home's value is $1,390,542.
Single-familyProperty Type
1992Year Built
0.54 acresLot Size
$410Est. Price/Sq.Ft.
3 car garageParking
Source:Public Records
Redfin Estimate
$1,390,542
$416K since sold in December 2016$19K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 19.1% higher than the average sale price ($1.17M) 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-20
Rural Residential District - 20,000 sq ft
The RR zoning district is applied to areas of the City intended to accommodate residential neighborhoods with compatible agricultural uses, but where the primary uses are residential, and compatible accessory uses. The maximum allowable density ranges from 0.2 to 2 dwellings per acre, with the specific allowable density for each parcel shown on the zoning map by a numerical suffix to the RR map symbol see Section 20-22.040. The RR zoning district implements and is consistent with the Residential Very Low Density land use classification of the General Plan.
Permitted uses
Include but are not limited to:
Agriculture-Other
Healthcare-Other
Housing-Group
Housing-Single unit
Housing-Student
Housing-Other
Infrastructure-Other
Agriculture-Cropland
Agriculture-Grove / orchard / vineyard
Housing-Mobile home park
Oct 20, 2020 • Final
Residential plumbing
Replace a water heater.
Plumbing
Water heater
Jan 15, 2019 • Final
Residential addition-alteration
Remove the existing roof and install new composition shingles.
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: 3
Fireplace Information
# of Fireplaces: 3
Has Fireplace
Room Information
# of Rooms: 10
Exterior
Exterior Information
Building Style Type: U-Shape
Construction Type: Wood/Steel
Building Construction Quality: Good
Property Information
Subdivision Name: ALTA VISTA HEIGHTS
Living Sq. Ft: 3,395
Building Sq. Ft: 4,226
# of Stories: 2
Legal Description: REMAP FM 11-450-039 09/13/97 ALTA VISTA HGTS LT 39
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 831
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 23,525
Legal Lot Number: 39
Acres: 0.5401
Zoning Code: CITYSR
County Use Description: DETACHED UNIT
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 3,395
Stories: 2.0
Lot Size: 0.54 acres
Style: Single Family Residential
Year Built: 1992
Year Renovated: 2010
County: Sonoma County
APN: 181100039000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Madrone Elementary School
Public K-6 • Assigned • 1.0mi
6/10
Rincon Valley Middle School
Public 7-8 • Assigned • 1.8mi
5/10
Maria Carrillo High School
Public 9-12 • Assigned • 2.1mi
9/10
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
3/10 Fire Factor
0.31% chance of being in a wildfire in next 30 years
3/10 Heat Factor
5 days above 92° expected this year, 10 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
10/10 Air Factor
21 unhealthy days expected this year, 21 days in 30 years
Provided by First Street
Historical weather
Santa Rosa, CA • 95409
Average low and high temperatures (°F)
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74
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53
85
55
82
55
76
52
62
46
58
44
Jan
Feb
Mar
Apr
May
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Sun exposure
In this area, properties receive around 11.1 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.1 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.32M – $1.60M
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