131 Marathon Rd is a 1,490 square foot house on a 6,311 square foot lot with 4 bedrooms and 2 bathrooms. - it last sold on June 27, 1997 for $167,000. Based on Redfin's Altadena data, we estimate the home's value is $935,837.
Single-familyProperty Type
1947Year Built
6,311 sq ftLot Size
$628Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$935,837
$769K since sold in June 1997$54K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 35.8% higher 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
Nov 17, 2026 • Active
Electrical permit (simple) - county
Perform electrical work for a new one-story accessory dwelling unit. The project includes wiring for two bedrooms and two bathrooms.
ADU
Electrical
Nov 17, 2026 • Active
Sewer permit (simple) - county
Install a new sewer line for a single-story accessory dwelling unit. The project is part of a fire rebuild.
ADU
Plumbing
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: 1,490
# of Units: 1
Legal Description: TRACT # 12607 LOT 33
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,311
Legal Lot Number: 33
Acres: 0.1449
Depth Footage: 115
Front Footage: 53
Zoning Code: LCR17500*
County Use Description: SINGLE FAMILY RESID
Location Information
Parcel Location Influence: Corner
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 1,490
Stories: —
Lot Size: 6,311 square feet
Style: Single Family Residential
Year Built: 1947
Year Renovated: 1949
County: Los Angeles County
APN: 5833009019
Home facts updated by county records on Oct 8, 2026
Around this home
Schools
Altadena Elementary School
Public K-5 • Assigned • 1.1mi
5/10
Eliot Arts Magnet
Public 6-8 • Assigned • 1.3mi
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
28% chance of being in a wildfire in next 30 years
5/10 Heat Factor
7 days above 96° expected this year, 19 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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86
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81
58
71
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69
50
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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
$828,000 – $1.00M
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