4500 Blum Rd is a 1,993 square foot house on a 2 acre lot with 3 bedrooms and 2 bathrooms. - it last sold on March 13, 2018 for $850,000. Based on Redfin's Martinez data, we estimate the home's value is $1,236,202.
Single-familyProperty Type
1957Year Built
2 acresLot Size
$620Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,236,202
$386K since sold in March 2018$33K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 74.1% higher than the average sale price ($710K) 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 28, 2012 • Final
Building - residential mechanical
Replace the furnace and supply ducts with new returns.
HVAC
Jan 30, 2010 • Final
Building - residential re-roof
Work on a reroof.
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: SUBDIVISION 8738
Living Sq. Ft: 1,993
Ground Floor Sq. Ft: 1,993
Building Sq. Ft: 1,993
# of Stories: 1
Legal Description: PCL MAP 102 PG 15 PCL A
Parking & Garage Information
Garage/Parking Sq. Ft: 615
Lot Information
# of Buildings: 1
Land Sq. Ft: 87,120
Legal Lot Number: 2
Acres: 2
Zoning Code: R-7
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,993
Stories: 1.0
Lot Size: 2 acres
Style: Single Family Residential
Year Built: 1957
Year Renovated: 1957
County: Contra Costa County
APN: 1591700289
Home facts updated by county records on Oct 9, 2026
Around this home
Schools
Las Juntas Elementary School
Public K-5 • Assigned • 0.8mi
5/10
Martinez Junior High School
Public 6-8 • Assigned • 2.9mi
7/10
Alhambra Senior High School
Public 9-12 • Assigned • 3.0mi
8/10
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
3/10 Fire Factor
0.46% chance of being 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
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83
57
87
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83
61
78
56
64
49
56
46
Jan
Feb
Mar
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May
Jun
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Aug
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Dec
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
$1.18M – $1.42M
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