840 Carr Ave is a 740 square foot house on a 7,500 square foot lot with 1 bedroom and 1 bathroom. - it last sold on October 23, 2020 for $530,000. Based on Redfin's Santa Rosa data, we estimate the home's value is $600,993.
Single-familyProperty Type
1924Year Built
7,500 sq ftLot Size
$812Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$600,993
$71K since sold in October 2020$13K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 12.8% lower than the average sale price ($689K) 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
Jul 18, 2025 • Final
Residential new
Demolish a carport and replace it with a new accessory dwelling unit.
ADU
Demolition
Dec 5, 2024 • Active
Residential addition-alteration
Remove the existing composition roof and install a new composition roof. Install modified bitumen torch-down roofing on the low-slope area.
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: 4
Exterior
Exterior Information
Building Style Type: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Subdivision Name: NORWOOD ADD
Living Sq. Ft: 740
Ground Floor Sq. Ft: 740
Building Sq. Ft: 1,010
# of Stories: 1
Legal Description: REMAP FROM 012-173-005-000 - 09/13/97
Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 231
Garage / Carport Type: Detached
Lot Information
# of Buildings: 1
Land Sq. Ft: 7,500
Legal Block Number: 6
Acres: 0.1722
Zoning Code: CITYSR
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 740
Stories: 1.0
Lot Size: 7,500 square feet
Style: Single Family Residential
Year Built: 1924
Year Renovated: 1984
County: Sonoma County
APN: 180450057000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Hidden Valley Elementary Satellite School
Public K-6 • Assigned • 1.4mi
8/10
Santa Rosa Middle School
Public 7-8 • Assigned • 0.8mi
2/10
Santa Rosa High School
Public 9-12 • Assigned • 0.6mi
6/10
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
2/10 Fire Factor
0.00% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 92° expected this year, 15 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 • 95404
Average low and high temperatures (°F)
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79
51
65
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44
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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
$571,000 – $692,000
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