421 Athens St is a 1,256 square foot house on a 7,669 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on April 28, 1969 for $15,000. Based on Redfin's Altadena data, we estimate the home's value is $885,687.
Single-familyProperty Type
1949Year Built
7,669 sq ftLot Size
$705Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$885,687
$871K since sold in April 1969$40K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 52.7% higher than the average sale price ($580K) 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
Jan 5, 2027 • Active
Residential new construction building permit - county
Construct a new detached one-story accessory dwelling unit featuring two bedrooms, two bathrooms, and a covered patio.
ADU
New construction
Jan 5, 2027 • Active
Mechanical permit (simple) - county
Mechanical work for a new two-story single-family home with an attached garage and a front porch.
HVAC
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
Heating & Cooling
Air Conditioning Type: Central
Heating Type: Central
Exterior
Property Information
Subdivision Name: 6817
Living Sq. Ft: 1,256
# of Units: 1
Legal Description: TRACT # 6817 LOT 48
Lot Information
# of Buildings: 2
Land Sq. Ft: 7,669
Legal Lot Number: 48
Acres: 0.1761
Depth Footage: 154
Front Footage: 49
Zoning Code: LCR175
County Use Description: SINGLE FAMILY RESID W/ADU
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,256
Stories: —
Lot Size: 7,669 square feet
Style: Single Family Residential
Year Built: 1949
Year Renovated: 1968
County: Los Angeles County
APN: 5841003022
Home facts updated by county records on Oct 8, 2026
Around this home
Schools
Altadena Elementary School
Public K-5 • Assigned • 0.9mi
5/10
Eliot Arts Magnet
Public 6-8 • Assigned • 1.1mi
2/10
John Muir High School
Public 9-12 • Assigned • 2.0mi
4/10
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
8/10 Fire Factor
27% chance of being in a wildfire in next 30 years
5/10 Heat Factor
5 days above 95° expected this year, 13 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
21 unhealthy days expected this year, 24 days in 30 years
Provided by First Street
Historical weather
Altadena, CA • 91001
Average low and high temperatures (°F)
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Sun exposure
In this area, properties receive around 10.2 hours in
June and 6.5 hours in December, placing it above the
U.S. average for solar exposure.
10.2 hrs
6.5 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$842,000 – $1.02M
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