1237 Castro St #1231 is a 3,420 square foot multi-family home on a 5,000 square foot lot. - it last sold on July 19, 2002 for $430,000. Based on Redfin's Martinez data, we estimate the home's value is $824,608.
Multi-familyProperty Type
1924Year Built
5,000 sq ftLot Size
$241Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$824,608
$395K since sold in July 2002$45K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 13.7% higher than the average sale price ($725K) 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.
Zoning
R-3.5
Family Residential District
The R Residential Districts are included in the zoning regulations to achieve the following purposes: Reserve appropriately located areas tar residential living in a variety of types of dwellings, at a reasonable range of population densities consistent with sound standards of public health and safety; Ensure adequate light, air and privacy for each dwelling unit; Provide adequate amounts of private open space in proximity to each dwelling unit; Provide space for community facilities needed to complement urban residential areas; Provide space for institutions which require a residential environment; Minimize traffic congestion and to avoid the overloading of utilities by preventing the construction of buildings of excessive size in relation to the land around them; Provide necessary space for off-street parking of automobiles and, where appropriate for off-street loading of trucks; Protect residential properties from the hazs, noise and congestion created by commercial and industrial traffic; Protect residential properties from noise, illumination, unsightliness, odors, dust, dirt, smoke, vibration, heat, glare and other objectionable influences; Protect residential properties from fire, explosion, noxious fumes and other hazards.
Permitted uses
Include but are not limited to:
Agriculture-Other
Housing-Group
Housing-Single unit
Housing-Multiple units
Housing-Senior
Housing-Other
Property details
Interior
Room Information
# of Rooms: 4
Exterior
Property Information
Subdivision Name: MARTINEZ CENTER 01
Living Sq. Ft: 3,420
Ground Floor Sq. Ft: 3,420
Building Sq. Ft: 3,420
# of Stories: 1
Legal Description: ORIGINAL SURVEY POR LOTS 5&6 BLK 46
Lot Information
# of Buildings: 1
Land Sq. Ft: 5,000
Legal Lot Number: 5
Legal Block Number: 46
Acres: 0.1148
Depth Footage: 100
Front Footage: 50
County Use Description: FOURPLEX
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: —
Baths: —
Sq. Ft.: 3,420
Stories: 1.0
Lot Size: 5,000 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 1924
Year Renovated: 1960
County: Contra Costa County
APN: 3723320077
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
John Muir Elementary School
Public K-5 • Assigned • 1.2mi
6/10
Martinez Junior High School
Public 6-8 • Assigned • 0.2mi
7/10
Alhambra Senior High School
Public 9-12 • Assigned • 0.7mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
9/10 Flood Factor
Estimated 80%+ chance of a flood reaching the building in the next 30 years
4/10 Fire Factor
3% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 97° 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
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
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83
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84
59
78
56
64
49
56
46
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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
$784,000 – $949,000
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