2121 Onyx Way is a 1,350 square foot house on a 3,350 square foot lot with 4 bedrooms and 2.5 bathrooms. Based on Redfin's Santa Rosa data, we estimate the home's value is $670,892.
Single-familyProperty Type
2000Year Built
3,350 sq ftLot Size
$497Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$670,892
$11K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.8% higher than the average sale price ($659K) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$4,129 (+1.2%)
$109,732 + $250,674
$360,406
2024
$4,081 (−1.2%)
$107,581 + $245,759
$353,340
2023
$4,133 (+3.7%)
$105,472 + $240,941
$346,413
2022
$3,985 (+1.1%)
$103,404 + $236,217
$339,621
2021
$3,943 (+2.9%)
$101,377 + $231,586
$332,963
2020
$3,830 (+1.2%)
$99,390 + $227,046
$326,436
2019
$3,784 (+0.8%)
$98,371 + $224,718
$323,089
2018
$3,754 (+2.5%)
$96,443 + $220,312
$316,755
2017
$3,664 (+4.6%)
$92,699 + $211,758
$304,457
2015
$3,502 (+3.6%)
$90,882 + $207,606
$298,488
2014
$3,380 (+5.7%)
$87,764 + $200,483
$288,247
2013
$3,196 (+14.1%)
$87,764 + $200,483
$288,247
2012
$2,802 (−7.6%)
$83,500 + $191,500
$275,000
2011
$3,032 (−2.7%)
$73,000 + $167,500
$240,500
2010
$3,117
$79,000 + $182,000
$261,000
2009
$3,119 (+4.2%)
$83,349 + $190,395
$273,744
2007
$2,993
$81,909 + $187,106
$269,015
Tax history for 2121 Onyx Way
Year
Property tax
Land + Additions
Assessment*
2025
$4,129 (+1.2%)
$109,732 + $250,674
$360,406
2024
$4,081 (−1.2%)
$107,581 + $245,759
$353,340
2023
$4,133 (+3.7%)
$105,472 + $240,941
$346,413
2022
$3,985 (+1.1%)
$103,404 + $236,217
$339,621
2021
$3,943 (+2.9%)
$101,377 + $231,586
$332,963
2020
$3,830 (+1.2%)
$99,390 + $227,046
$326,436
2019
$3,784 (+0.8%)
$98,371 + $224,718
$323,089
2018
$3,754 (+2.5%)
$96,443 + $220,312
$316,755
2017
$3,664 (+4.6%)
$92,699 + $211,758
$304,457
2015
$3,502 (+3.6%)
$90,882 + $207,606
$298,488
2014
$3,380 (+5.7%)
$87,764 + $200,483
$288,247
2013
$3,196 (+14.1%)
$87,764 + $200,483
$288,247
2012
$2,802 (−7.6%)
$83,500 + $191,500
$275,000
2011
$3,032 (−2.7%)
$73,000 + $167,500
$240,500
2010
$3,117
$79,000 + $182,000
$261,000
2009
$3,119 (+4.2%)
$83,349 + $190,395
$273,744
2007
$2,993
$81,909 + $187,106
$269,015
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Mar 17, 2025 • Active
Residential addition-alteration
Remove the existing roof and install a new composition shingle cool roof. The work is a like-for-like replacement.
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: 2
# of 1/2 Baths: 1
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 7
Exterior
Exterior Information
Building Style Type: U-Shape
Construction Type: Wood/Steel
Building Construction Quality: Average
Property Information
Subdivision Name: KAWANA SPGS 1
Living Sq. Ft: 1,350
Building Sq. Ft: 1,350
# of Stories: 2
Legal Description: 2000 FM PT 044-031-42 KAWANA SPRINGS PH 1 LOT 49
Lot Information
# of Buildings: 1
Land Sq. Ft: 3,350
Legal Lot Number: 49
Acres: 0.0769
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.5
Sq. Ft.: 1,350
Stories: 2.0
Lot Size: 3,350 square feet
Style: Single Family Residential
Year Built: 2000
Year Renovated: 2000
County: Sonoma County
APN: 044360049000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Kawana Elementary School
Public K-6 • Assigned • 0.2mi
4/10
Montgomery High School
Public 9-12 • Assigned • 1.8mi
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
3/10 Fire Factor
0.77% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 92° expected this year, 17 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
15 unhealthy days expected this year, 17 days in 30 years
Provided by First Street
Historical weather
Santa Rosa, CA • 95404
Average low and high temperatures (°F)
63
41
64
44
72
47
70
47
77
51
80
54
79
54
86
55
83
55
79
51
65
46
60
44
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
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
$638,000 – $772,000
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