21 Spring St is a 2,301 square foot multi-family home on a 10,000 square foot lot with 6 bedrooms and 2 bathrooms. Based on Redfin's Petaluma data, we estimate the home's value is $1,152,604.
Multi-familyProperty Type
1947Year Built
10,000 sq ftLot Size
$501Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,152,604
$94K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 12.1% lower than the average sale price ($1.31M) 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
$1,623 (+6.3%)
$35,789 + $88,248
$124,037
2024
$1,527 (+7.3%)
$35,088 + $86,518
$121,606
2023
$1,423 (+0.8%)
$34,400 + $84,822
$119,222
2022
$1,412 (+1.7%)
$33,726 + $83,159
$116,885
2021
$1,388 (−0.8%)
$33,065 + $81,529
$114,594
2020
$1,399 (+1.1%)
$32,417 + $79,931
$112,348
2019
$1,383 (+0.3%)
$32,085 + $79,112
$111,197
2018
$1,378 (+1.9%)
$31,456 + $77,561
$109,017
2017
$1,352 (+4.3%)
$30,236 + $74,550
$104,786
2015
$1,297 (+0.5%)
$29,644 + $73,089
$102,733
2014
$1,291 (+3.6%)
$28,628 + $70,582
$99,210
2013
$1,247 (+2.1%)
$28,628 + $70,582
$99,210
2012
$1,221 (+1.8%)
$28,499 + $70,264
$98,763
2011
$1,199 (+1.2%)
$27,941 + $68,887
$96,828
2010
$1,185 (−0.5%)
$27,394 + $67,537
$94,931
2009
$1,191 (+1.6%)
$27,190 + $67,033
$94,223
2007
$1,172
$26,721 + $65,876
$92,597
Tax history for 21 Spring St
Year
Property tax
Land + Additions
Assessment*
2025
$1,623 (+6.3%)
$35,789 + $88,248
$124,037
2024
$1,527 (+7.3%)
$35,088 + $86,518
$121,606
2023
$1,423 (+0.8%)
$34,400 + $84,822
$119,222
2022
$1,412 (+1.7%)
$33,726 + $83,159
$116,885
2021
$1,388 (−0.8%)
$33,065 + $81,529
$114,594
2020
$1,399 (+1.1%)
$32,417 + $79,931
$112,348
2019
$1,383 (+0.3%)
$32,085 + $79,112
$111,197
2018
$1,378 (+1.9%)
$31,456 + $77,561
$109,017
2017
$1,352 (+4.3%)
$30,236 + $74,550
$104,786
2015
$1,297 (+0.5%)
$29,644 + $73,089
$102,733
2014
$1,291 (+3.6%)
$28,628 + $70,582
$99,210
2013
$1,247 (+2.1%)
$28,628 + $70,582
$99,210
2012
$1,221 (+1.8%)
$28,499 + $70,264
$98,763
2011
$1,199 (+1.2%)
$27,941 + $68,887
$96,828
2010
$1,185 (−0.5%)
$27,394 + $67,537
$94,931
2009
$1,191 (+1.6%)
$27,190 + $67,033
$94,223
2007
$1,172
$26,721 + $65,876
$92,597
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
R2
Residential 2 Zone
The R2 zone is applied to areas previously developed and intended for detached single dwellings on individual lots, at densities ranging from 2.6 to 8.0 units per acre. The R2 zone is consistent with and implements the low density residential land use classification of the general plan.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Senior
Lodging & hospitality
Fire house
Police station
Park & open space
Property details
Interior
Bathroom Information
# of Full Baths: 2
Room Information
# of Rooms: 4
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood/Steel
Building Construction Quality: Average
Property Information
Living Sq. Ft: 2,301
Building Sq. Ft: 2,301
# of Stories: 1
Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 720
Garage / Carport Type: Detached
Lot Information
# of Buildings: 1
Land Sq. Ft: 10,000
Legal Lot Number: 188
Acres: 0.2296
Zoning Code: CITYPE
County Use Description: DUPLEX
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 6
Baths: 2.0
Sq. Ft.: 2,301
Stories: 1.0
Lot Size: 10,000 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 1947
Year Renovated: 1947
County: Sonoma County
APN: 008152017000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
McNear Elementary School
Public K-6 • Assigned • 0.5mi
8/10
Petaluma Junior High School
Public 7-8 • Assigned • 0.8mi
4/10
Petaluma High School
Public 9-12 • Assigned • 0.1mi
8/10
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
0.46% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 90° expected this year, 16 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
12 unhealthy days expected this year, 12 days in 30 years
Provided by First Street
Historical weather
Petaluma, CA • 94952
Average low and high temperatures (°F)
59
40
59
42
64
43
61
44
65
47
67
49
67
51
73
51
73
52
72
48
61
44
56
42
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
$1.10M – $1.33M
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