644 Mill St is a 942 square foot house on a 4,758 square foot lot with 2 bedrooms and 1 bathroom. - it last sold on June 26, 2024 for $540,000. Based on Redfin's Santa Rosa data, we estimate the home's value is $431,707.
Single-familyProperty Type
1918Year Built
4,758 sq ftLot Size
$458Est. Price/Sq.Ft.
2 spacesParking
Source:Public Records
Redfin Estimate
$431,707
$108K since sold in June 2024$5,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 25.7% lower than the average sale price ($581K) of 4 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jun 28, 2015 • Final
Residential addition-alteration
Legalize an existing addition and full bathroom at a single-family home. Remove an illegal kitchen by converting the sink to a bar sink and maintain existing cabinets. This work includes a landmark alteration for the addition.
Addition
Remodel
Jun 28, 2015 • Final
Residential addition-alteration
Remove and replace deteriorated siding on the west and south sides of the house. Install new lap siding to match the existing exterior.
Remodel
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: Average
Property Information
Subdivision Name: WHEELERS ADD 02
Living Sq. Ft: 942
Ground Floor Sq. Ft: 942
Building Sq. Ft: 942
# of Stories: 1
Legal Description: MAP D1 141
Parking & Garage Information
Garage/Parking Sq. Ft: 360
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,758
Legal Lot Number: 140
Legal Block Number: 5
Acres: 0.1092
Zoning Code: CITYSR
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.0
Sq. Ft.: 942
Stories: 1.0
Lot Size: 4,758 square feet
Style: Single Family Residential
Year Built: 1918
Year Renovated: 1924
County: Sonoma County
APN: 009263003000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Luther Burbank Elementary School
Public K-6 • Assigned • 0.3mi
5/10
Montgomery High School
Public 9-12 • Assigned • 1.5mi
7/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
3/10 Flood Factor
Estimated 10-14% chance of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.15% 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
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)
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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
$411,000 – $497,000
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