View of Mt Diablo awaits you in this serene residence. Freshly painted, new flooring, just waiting for you. Enjoy dining in your modern kitchen. Mature trees and ample yard space for your outdoor enjoyment.
Single-familyProperty Type
1973Year Built
4,680 sq ftLot Size
$596Est. Price/Sq.Ft.
1 car garageParking
Listed by Ronald Poropat•DRE #00711888• BHHS Drysdale Properties
Bought with Carol Nassar•DRE #02042940• Dudum Real Estate Group
bridgeMLS, Bay East AOR, or Contra Costa AOR #41031229
Jul 26, 2023
Sold
$650,000
$566/sq ft
Jun 30, 2023
Pending
—
Jun 23, 2023
Listed
$629,000
$548/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$8,812 (+4.7%)
$447,372 + $228,888
$676,260
2024
$8,419 (+392.0%)
$438,600 + $224,400
$663,000
2023
$1,711 (+5.5%)
$430,000 + $220,000
$650,000
2022
$1,623 (+5.8%)
$14,010 + $59,835
$73,845
2021
$1,533 (+4.9%)
$13,736 + $58,662
$72,398
2020
$1,462 (+4.9%)
$13,467 + $57,512
$70,979
2019
$1,394 (+4.0%)
$13,329 + $56,923
$70,252
2018
$1,341 (+2.2%)
$13,068 + $55,807
$68,875
2017
$1,312 (+3.0%)
$12,561 + $53,641
$66,202
2016
$1,274 (+1.4%)
$12,561 + $53,641
$66,202
2015
$1,256 (+1.9%)
$12,315 + $52,590
$64,905
2014
$1,232 (+1.1%)
$11,894 + $50,787
$62,681
2013
$1,218 (+2.8%)
$11,894 + $50,787
$62,681
2012
$1,185 (+0.9%)
$11,841 + $50,558
$62,399
2011
$1,174 (+0.4%)
$11,609 + $49,567
$61,176
2010
$1,169 (+0.4%)
$11,382 + $48,596
$59,978
2009
$1,165 (+6.3%)
$11,297 + $48,233
$59,530
2008
$1,096
$11,324 + $48,348
$59,672
Tax history for 850 Shell Ave
Year
Property tax
Land + Additions
Assessment*
2025
$8,812 (+4.7%)
$447,372 + $228,888
$676,260
2024
$8,419 (+392.0%)
$438,600 + $224,400
$663,000
2023
$1,711 (+5.5%)
$430,000 + $220,000
$650,000
2022
$1,623 (+5.8%)
$14,010 + $59,835
$73,845
2021
$1,533 (+4.9%)
$13,736 + $58,662
$72,398
2020
$1,462 (+4.9%)
$13,467 + $57,512
$70,979
2019
$1,394 (+4.0%)
$13,329 + $56,923
$70,252
2018
$1,341 (+2.2%)
$13,068 + $55,807
$68,875
2017
$1,312 (+3.0%)
$12,561 + $53,641
$66,202
2016
$1,274 (+1.4%)
$12,561 + $53,641
$66,202
2015
$1,256 (+1.9%)
$12,315 + $52,590
$64,905
2014
$1,232 (+1.1%)
$11,894 + $50,787
$62,681
2013
$1,218 (+2.8%)
$11,894 + $50,787
$62,681
2012
$1,185 (+0.9%)
$11,841 + $50,558
$62,399
2011
$1,174 (+0.4%)
$11,609 + $49,567
$61,176
2010
$1,169 (+0.4%)
$11,382 + $48,596
$59,978
2009
$1,165 (+6.3%)
$11,297 + $48,233
$59,530
2008
$1,096
$11,324 + $48,348
$59,672
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Permits
Beds
3
Baths
2
Stories
1
Lot width
—
Lot depth
—
Lot size
4,680 Sq. Ft.
Year renovated
1980
Sq. Ft.
1,148
Year built
1973
Style
Single Family Residential
County
Contra Costa County
APN
3751330139
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 13, 2026.
Aug 18, 2021 • Final
Building/residential/al/alteration
Replace a toilet in the master bathroom in the same location.
Bathroom
Aug 18, 2021 • Final
Building/residential/al/alteration
Demolish and replace a shower pan, wet walls, and valve. Install a new toilet, vanity, exhaust fan, vacancy sensor, dedicated electrical circuit, and light fixtures. Install a new seismic natural gas shut-off valve.
Bathroom
Electrical
Plumbing
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
Parking
Parking Information
Has Attached Garage
Garage Spaces: 1
Covered Spaces: 1
Parking Features: Attached, Garage Door Opener
Interior
Bathroom Information
# of Bathrooms Total: 2
# of Bathrooms Full: 2
Interior Features
Interior Features: No Additional Rooms, Eat-in Kitchen, Updated Kitchen
Appliances: Dishwasher, Refrigerator
Laundry Features: Hookups Only, In Garage
Street Level Features: 3 Bedrooms, 2 Baths, Laundry Facility, Main Entry
Window Features: Window Coverings
Flooring: Linoleum
Room Information
Kitchen Features: Dishwasher,Eat In Kitchen,Refrigerator,Updated Kitchen
Rooms Total: 5
Exterior
Building Information
Construction Materials: Stucco
Building Area Total: 1,148
Exterior Features
Exterior Features: Back Yard, Front Yard
Roof: Shingle
Property Information
Living Area: 1148
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1973
Lot Information
Lot Size Square Feet: 4680
Lot Size Area: 0.11
Lot Size Units: Acres
Lot Size Acres: 0.11
Lot Features: Regular, Secluded
Utilities
Utility Information
Water Source: Public
Sewer: Public Sewer
Heating & Cooling
Has Heating
Heating: Forced Air
Cooling: Wall/Window Unit(s)
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,148
Stories: 1.0
Lot Size: 4,680 square feet
Style: Single Family Residential
Year Built: 1973
Year Renovated: 1980
County: Contra Costa County
APN: 3751330139
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Morello Park Elementary School
Public K-5 • Assigned • 1.3mi
9/10
Martinez Junior High School
Public 6-8 • Assigned • 0.6mi
7/10
Alhambra Senior High School
Public 9-12 • Assigned • 0.6mi
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
5/10 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
62
45
70
49
70
49
77
53
80
55
80
56
87
59
84
59
78
56
64
49
56
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
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
$650,000 – $787,000
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Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2023. This data may not match public records. Learn more.