231 Marathon Rd is a 1,366 square foot house on a 6,303 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on May 23, 1972 for $21,500. Based on Redfin's Altadena data, we estimate the home's value is $904,018.
Single-familyProperty Type
1947Year Built
6,303 sq ftLot Size
$662Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$904,018
$883K since sold in May 1972$3,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 55.9% 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
Nov 3, 2026 • Active
Residential new construction building permit - county
Construct a new one-story single-family home with an attached garage and an entry porch. The residence includes three bedrooms and two bathrooms.
New construction
Sep 4, 2026 • Final
Construction and demolition - deposit
Construct a new one-story single-family home featuring three bedrooms and two bathrooms. The project includes an attached garage and an entry porch.
Demolition
New construction
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
Exterior
Property Information
Subdivision Name: 12607
Living Sq. Ft: 1,366
# of Units: 1
Legal Description: TRACT # 12607 LOT 96
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,303
Legal Lot Number: 96
Acres: 0.1447
Depth Footage: 115
Front Footage: 53
Zoning Code: LCR175
County Use Description: SINGLE FAMILY RESID
Location Information
Parcel Location Influence: Corner
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,366
Stories: —
Lot Size: 6,303 square feet
Style: Single Family Residential
Year Built: 1947
Year Renovated: 1948
County: Los Angeles County
APN: 5833007016
Home facts updated by county records on Oct 8, 2026
Around this home
Schools
Altadena Elementary School
Public K-5 • Assigned • 1.0mi
5/10
Eliot Arts Magnet
Public 6-8 • Assigned • 1.2mi
2/10
John Muir High School
Public 9-12 • Assigned • 1.8mi
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
7 days above 95° expected this year, 18 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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81
58
71
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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
$859,000 – $1.04M
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