This spectacular Castro Valley home features an open floorplan with many upgrades, including hardwood flooring, recessed lighting, a gas fireplace insert, remodeled bathroom, dual pane windows and central heating & AC with a Nest thermostat. The kitchen has been completely remodeled with new cabinets, quartz countertops, stainless steel appliances and tile flooring. New carpet in the bedrooms and a bonus room off of a bedroom that is perfect for an office or playroom. The converted garage can be used as another bedroom, office or bonus room. The park like backyard has artificial lawn, hot tub, and an oversized raised bed. All furniture is for sale.
Single-familyProperty Type
1942Year Built
6,760 sq ftLot Size
$729Est. Price/Sq.Ft.
1 spaceParking
Listed by Nick Asturias•DRE #01872321• KW Advisors East Bay
Bought with Ekaterina Fomina•DRE #02092488• Crypton Realty
Freshly remodeled home with brand new kitchen appliances, beautiful looking fireplace, upstairs attic style room.
Great size backyard with amazing potential. Great location very close to Bart, I-580 and downtown Castro Valley.
8 years ago• May not reflect the current state of the home
bridgeMLS, Bay East AOR, or Contra Costa AOR #40839962
Nov 8, 2018
Sold
$670,000
$525/sq ft
Oct 9, 2018
Pending
—
Sep 25, 2018
Listed
$629,900
$493/sq ft
Public Records
Aug 15, 2018
Sold
$520,000
$407/sq ft
Public Records
May 26, 1989
Sold
$168,000
$132/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$11,450 (+2.5%)
$224,215 + $656,381
$880,596
2024
$11,174 (+18.2%)
$224,215 + $656,381
$880,596
2023
$9,456 (+2.3%)
$219,819 + $643,512
$863,331
2022
$9,247 (+1.0%)
$211,285 + $492,998
$704,283
2021
$9,153 (+1.3%)
$211,285 + $492,998
$704,283
2020
$9,037 (−0.8%)
$207,142 + $483,332
$690,474
2019
$9,108 (+128.4%)
$205,020 + $478,380
$683,400
2018
$3,988 (+2.6%)
$201,000 + $469,000
$670,000
2017
$3,888 (+6.3%)
$81,491 + $190,147
$271,638
2016
$3,659 (+2.9%)
$81,491 + $190,147
$271,638
2015
$3,555 (+5.7%)
$79,894 + $186,419
$266,313
2014
$3,363 (+1.5%)
$77,152 + $180,023
$257,175
2013
$3,313 (+2.3%)
$77,152 + $180,023
$257,175
2012
$3,239 (+2.3%)
$76,804 + $179,210
$256,014
2011
$3,165 (+2.2%)
$75,298 + $175,696
$250,994
2010
$3,097 (−1.1%)
$73,822 + $172,252
$246,074
2009
$3,133 (+4.5%)
$73,271 + $170,965
$244,236
2008
$2,998
$73,445 + $171,372
$244,817
Tax history for 21433 Rizzo Ave
Year
Property tax
Land + Additions
Assessment*
2025
$11,450 (+2.5%)
$224,215 + $656,381
$880,596
2024
$11,174 (+18.2%)
$224,215 + $656,381
$880,596
2023
$9,456 (+2.3%)
$219,819 + $643,512
$863,331
2022
$9,247 (+1.0%)
$211,285 + $492,998
$704,283
2021
$9,153 (+1.3%)
$211,285 + $492,998
$704,283
2020
$9,037 (−0.8%)
$207,142 + $483,332
$690,474
2019
$9,108 (+128.4%)
$205,020 + $478,380
$683,400
2018
$3,988 (+2.6%)
$201,000 + $469,000
$670,000
2017
$3,888 (+6.3%)
$81,491 + $190,147
$271,638
2016
$3,659 (+2.9%)
$81,491 + $190,147
$271,638
2015
$3,555 (+5.7%)
$79,894 + $186,419
$266,313
2014
$3,363 (+1.5%)
$77,152 + $180,023
$257,175
2013
$3,313 (+2.3%)
$77,152 + $180,023
$257,175
2012
$3,239 (+2.3%)
$76,804 + $179,210
$256,014
2011
$3,165 (+2.2%)
$75,298 + $175,696
$250,994
2010
$3,097 (−1.1%)
$73,822 + $172,252
$246,074
2009
$3,133 (+4.5%)
$73,271 + $170,965
$244,236
2008
$2,998
$73,445 + $171,372
$244,817
*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
Zoning
Permits
Beds
4
Baths
2
Stories
1
Lot width
—
Lot depth
—
Lot size
6,760 Sq. Ft.
Year renovated
1969
Sq. Ft.
1,327
Year built
1942
Style
Single Family Residential
County
Alameda County
APN
415 006006400
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 27, 2026.
R1
Single-Family Residence Districts
Single-family residence districts, hereinafter designated as R-1 districts, are established to provide for and protect established neighborhoods of one-family dwellings, and to provide space in suitable locations for additional development of this kind, together with appropriate community facilities and allowance for restricted interim cultivation of the soil compatible with such low-density residential development.
Permitted uses
Include but are not limited to:
Housing-Single unit
Agriculture-Cropland
Agriculture-Grove / orchard
Feb 21, 2024 • Final
Building
Install a roof-mounted solar photovoltaic system on a residential building.
Electrical
Solar
Feb 9, 2024 • Final
Building
Upgrade the main electrical panel to a higher amperage.
Electrical
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
Parking Features: Converted Garage
Interior
Bathroom Information
# of Bathrooms Total: 1
# of Bathrooms Full: 1
Other Bathrooms Included Features: Shower Over Tub, Tile, Updated Baths
Interior Features
Interior Features: Bonus/Plus Room, Breakfast Bar, Stone Counters, Updated Kitchen
Appliances: Dishwasher, Disposal, Gas Range, Plumbed For Ice Maker, Microwave, Free-Standing Range, Refrigerator, Gas Water Heater
Laundry Features: Gas Dryer Hookup, Laundry Closet
Street Level Features: 3 Bedrooms, 1 Bath, Laundry Facility, Main Entry
Exterior Features: Back Yard, Front Yard, Side Yard, Sprinklers Automatic, Sprinklers Front
Fencing: Fenced
Roof: Shingle
Pool Information
Spa Features: Private
Has Spa
Property Information
Living Area: 1277
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1942
Lot Information
Lot Size Square Feet: 6760
Lot Size Area: 0.16
Lot Size Units: Acres
Lot Size Acres: 0.16
Lot Features: Regular
Utilities
Utility Information
Water Source: Public
Sewer: Public Sewer
Heating & Cooling
Has Heating
Heating: Forced Air
Cooling: Ceiling Fan(s), Central Air
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 1,327
Stories: 1.0
Lot Size: 6,760 square feet
Style: Single Family Residential
Year Built: 1942
Year Renovated: 1969
County: Alameda County
APN: 415 006006400
Home facts updated by county records on Jul 27, 2026
Around this home
Schools
Fairview Elementary School
Public K-6 • Assigned • 1.7mi
2/10
Bret Harte Middle School
Public 7-8 • Assigned • 1.4mi
4/10
Hayward High School
Public 9-12 • Assigned • 1.4mi
5/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Castro Valley's late-summer market shows a clear split. While median prices hold near $1.2M, increased inventory gives buyers leverage on older properties. However, immaculate homes still go pending in under 15 days. A strong, clean offer is key!
Strong buyer demand keeps the Castro Valley market moving incredibly fast. With homes frequently selling above their $1.2 million median price, decisive action is essential. To win here, buyers need to submit competitive offers quickly and minimize...
Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2018. This data may not match public records. Learn more.