4650 Blum Rd is a 1,228 square foot house on a 0.34 acre lot with 2 bedrooms and 2 bathrooms. - it last sold on September 30, 1994 for $179,500. Based on Redfin's Martinez data, we estimate the home's value is $650,384.
Single-familyProperty Type
1940Year Built
0.34 acresLot Size
$530Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$650,384
$471K since sold in September 1994$8,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 4% lower than the average sale price ($677K) 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
Apr 20, 2023 • Final
Building - residential solar photovoltaic
Install roof mounted solar modules on a residential building.
Electrical
Solar
Jan 28, 2013 • Final
Building - residential re-roof
Remove and replace the roof with composition shingles. Install a cool roof alternative and attic ventilation.
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
Heating & Cooling
Heating Fuel Type: Gas
Heating Type: Forced Air
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 5
Exterior
Exterior Information
Physical Condition: Good
Foundation Type: Slab
Building Style Type: Bungalow
Building Construction Quality: Average
Exterior Wall: Wood Siding
Property Information
Subdivision Name: LAS JUNTAS RHO
Living Sq. Ft: 1,228
Ground Floor Sq. Ft: 832
Building Sq. Ft: 1,228
# of Stories: 2
Legal Description: RECORD OF SURVEY 23 PG 18 PCL 1
Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Garage/Carport
Garage/Parking Sq. Ft: 528
Lot Information
# of Buildings: 1
Land Sq. Ft: 14,810
Acres: 0.34
Depth Footage: 208
Front Footage: 70
Zoning Code: R-7
County Use Description: SINGLE FAMILY
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 2.0
Sq. Ft.: 1,228
Stories: 2.0
Lot Size: 0.34 acres
Style: Single Family Residential
Year Built: 1940
Year Renovated: 1970
County: Contra Costa County
APN: 1591800246
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Las Juntas Elementary School
Public K-5 • Assigned • 1.0mi
5/10
Martinez Junior High School
Public 6-8 • Assigned • 3.1mi
7/10
Alhambra Senior High School
Public 9-12 • Assigned • 3.2mi
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
2/10 Fire Factor
0.00% 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)
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43
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70
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87
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84
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78
56
64
49
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46
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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
$618,000 – $748,000
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