4970 Blum Rd is a 5,568 square foot house on a 0.31 acre lot with 4 bedrooms and 2 bathrooms. - it last sold on November 09, 2007 for $830,000. Based on Redfin's Martinez data, we estimate the home's value is $1,045,393.
Single-familyProperty Type
1947Year Built
0.31 acresLot Size
$188Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,045,393
$215K since sold in November 2007$37K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 30.5% higher than the average sale price ($801K) of 6 comparable homes.
bridgeMLS, Bay East AOR, or Contra Costa AOR #41120613
Apr 6, 2026
Listing Removed
—
Public Records
Nov 9, 2007
Sold
$830,000
$149/sq ft
Public Records
May 27, 1998
Sold
$210,000
$38/sq ft
bridgeMLS, Bay East AOR, or Contra Costa AOR #10254010
Jun 1, 1998
Listing Removed
—
Apr 24, 1998
Sold
$210,000
$38/sq ft
Apr 13, 1998
Listed
$219,000
$39/sq ft
bridgeMLS, Bay East AOR, or Contra Costa AOR #28254010
Jun 1, 1998
Sold
$210,000
$38/sq ft
Apr 24, 1998
Listing Removed
—
Apr 13, 1998
Listed
$219,000
$39/sq ft
Public Records
May 20, 1991
Sold
$187,500
$34/sq ft
Year
Property tax
Land + Additions
Assessment*
2011
$4,928 (−5.5%)
$78,000 + $317,640
$395,640
2010
$5,216 (−46.5%)
$78,000 + $317,640
$395,640
2009
$9,753 (+2.6%)
$84,000 + $339,000
$423,000
2008
$9,509
$168,300 + $678,300
$846,600
Tax history for 4970 Blum Rd
Year
Property tax
Land + Additions
Assessment*
2011
$4,928 (−5.5%)
$78,000 + $317,640
$395,640
2010
$5,216 (−46.5%)
$78,000 + $317,640
$395,640
2009
$9,753 (+2.6%)
$84,000 + $339,000
$423,000
2008
$9,509
$168,300 + $678,300
$846,600
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
May 14, 2013 • Final
Building/commercial/mic/misc.
Construct a warehouse for commercial use as a contractor's storage building. No office use is permitted.
New construction
May 14, 2013 • Final
Building/residential/ad/single family addition
Construct a front porch and a rear addition to a single-family home. Convert the existing garage into a living space.
Addition
Remodel
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
Exterior
Property Information
Legal Description: HANSON VILLA LOT 4
#of Rooms: 7
# of Units: 1
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 5,568
Stories: 1.0
Lot Size: 0.31 acres
Style: Single Family Residential
Year Built: 1947
Year Renovated: 1968
County: Contra Costa County
APN: 1592100125
Home facts updated by county records on Apr 6, 2023
Around this home
Schools
Hidden Valley Elementary School
Public K-5 • Assigned • 1.2mi
7/10
Valley View Middle School
Public 6-8 • Assigned • 2.2mi
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
Historical weather
Martinez, CA • 94553
Average low and high temperatures (°F)
60
43
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87
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78
56
64
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46
Jan
Feb
Mar
Apr
May
Jun
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Aug
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Oct
Nov
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
$994,000 – $1.20M
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