4940 Blum Rd is a 1,299 square foot house on a 0.33 acre lot with 3 bedrooms and 2 bathrooms. - it last sold on September 07, 2001 for $255,000. Based on Redfin's Martinez data, we estimate the home's value is $660,332.
Single-familyProperty Type
1951Year Built
0.33 acresLot Size
$508Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$660,332
$405K since sold in September 2001$8,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 3.5% lower than the average sale price ($684K) 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 30, 2010 • Final
Building - residential plumbing
Repair a gas line.
Gas
Jan 30, 2010 • Final
Building - residential re-roof
Work on a roof.
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: 6
Exterior
Property Information
Subdivision Name: HANSON VILLA
Living Sq. Ft: 1,299
Ground Floor Sq. Ft: 1,299
Building Sq. Ft: 1,299
# of Stories: 1
Legal Description: HANSON VILLA POR LOTS 7 & 8
Parking & Garage Information
Garage/Parking Sq. Ft: 230
Lot Information
# of Buildings: 1
Land Sq. Ft: 14,500
Legal Lot Number: 7
Acres: 0.3329
Zoning Code: C
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,299
Stories: 1.0
Lot Size: 0.33 acres
Style: Single Family Residential
Year Built: 1951
Year Renovated: 1951
County: Contra Costa County
APN: 1592100067
Home facts updated by county records on Oct 9, 2026
Around this home
Schools
Hidden Valley Elementary School
Public K-5 • Assigned • 1.3mi
7/10
Valley View Middle School
Public 6-8 • Assigned • 2.3mi
8/10
College Park High School
Public 9-12 • Assigned • 2.2mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
3/10 Flood Factor
Estimated 10-14% 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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45
70
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49
77
53
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83
57
87
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83
61
78
56
64
49
56
46
Jan
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Aug
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Dec
Sun exposure
In this area, properties receive around 11.5 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.5 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$628,000 – $760,000
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