121 Arthur Rd is a 1,284 square foot house on a 10,000 square foot lot with 2 bedrooms and 1 bathroom. - it last sold on July 21, 1989 for $139,000. Based on Redfin's Martinez data, we estimate the home's value is $594,003.
Single-familyProperty Type
1941Year Built
10,000 sq ftLot Size
$463Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$594,003
$455K since sold in July 1989$3,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 5.6% lower than the average sale price ($629K) 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, 2003 • Final
Building - residential re-roof
Remove and replace shingles on a residential building.
Roofing
Jun 25, 2003 • Final
Building/residential/rp/repair
Repair fire damage to a single-family home. Rebuild the garage using the existing foundation, replace windows in their current size and location, and remodel the kitchen and bathroom. Install new interior sheetrock as specified in the project scope.
Bathroom
Kitchen
Remodel
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
Room Information
# of Rooms: 7
Exterior
Property Information
Subdivision Name: HIRSHFIELD
Living Sq. Ft: 1,284
Ground Floor Sq. Ft: 1,284
Building Sq. Ft: 1,284
# of Stories: 1
Legal Description: HIRSHFIELD TRACT LOT 3
Parking & Garage Information
Garage/Parking Sq. Ft: 462
Lot Information
# of Buildings: 1
Land Sq. Ft: 10,000
Legal Lot Number: 3
Acres: 0.2296
Zoning Code: D-1
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.0
Sq. Ft.: 1,284
Stories: 1.0
Lot Size: 10,000 square feet
Style: Single Family Residential
Year Built: 1941
Year Renovated: 1945
County: Contra Costa County
APN: 3800510103
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Las Juntas Elementary School
Public K-5 • Assigned • 0.1mi
5/10
Martinez Junior High School
Public 6-8 • Assigned • 2.2mi
7/10
Alhambra Senior High School
Public 9-12 • Assigned • 2.4mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
4/10 Flood Factor
Estimated 19-29% chance of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
4/10 Heat Factor
7 days above 98° expected this year, 14 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
8/10 Air Factor
13 unhealthy days expected this year, 13 days in 30 years
Provided by First Street
Historical weather
Martinez, CA • 94553
Average low and high temperatures (°F)
60
43
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49
77
53
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80
56
87
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84
59
78
56
64
49
56
46
Jan
Feb
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Sun exposure
In this area, properties receive around 11.8 hours in
June and 4.8 hours in December, placing it above the
U.S. average for solar exposure.
11.8 hrs
4.8 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$565,000 – $684,000
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