Alameda County  »  18880 Sydney Cir

18880 Sydney Circle, Castro Valley, CA 94546 Property Information

18880 Sydney Circle, Castro Valley, CA 94546 Property Information

  • General
  • Owner
  • Documents
  • Tax
  • Permits
  • Neighborhood
Unlock this property report with a free account.

Access up-to-date information from property owner names to sales history, tax info, title documents, mortgages, development, maps, permits and more.
Sign Up Now
Research 100M+ property records powered by:
  • 2000+ governmental and public data sources
  • 80 dedicated analysts and researchers
  • 20+ years of real estate experience
Learn More

Photo & Map Show Hide

18880 Sydney Circle, Castro Valley, CA 94546
static Mapbox map

Address

Primary address 18880 Sydney Circle, Castro Valley
Zip code 94546
County Alameda
Parcel ID 84B-415-66-1

Sales & Tax Overview for 18880 Sydney Circle, Castro Valley

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Sale date 04/04/2017
Sale price $710,000
Arm's length
Property tax $9,591

Lot & Building Information for 18880 Sydney Circle, Castro Valley

Building sqft 1,901
Building class Single Family Residential Homes Used as Such (1100)
Acreage 0.1
Units 1
Year built 1993
Stories 2
Bedrooms 4
Bathrooms 2
Unlock this property report with a free account.

Access up-to-date information from property owner names to sales history, tax info, title documents, mortgages, development, maps, permits and more.
Sign Up Now

Zoning, Use & Area Overview

Walk Score
Transit Score
Bike Score


Zoning district Planned Development (PD-1794)
School district Castro Vly Unif SCH

View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.

Other Property Data for 18880 Sydney Circle, Castro Valley

Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:

  • • Improvements for 18880 Sydney Circle, Castro Valley , including their type, square footage, grade and when they were built.
  • Development maps such as planimetric, zoning, land use and urban landscape maps (building age and stories).
Unlock all property data with a free account.
Sign up

About 18880 Sydney Circle, Castro Valley

What is the year built & the total sq. ft. for 18880 Sydney Circle, Castro Valley, CA 94546?

18880 Sydney Circle, Castro Valley, CA 94546 was built in 1993 and has a total of 1,901 square feet.

What is the assessed value of 18880 Sydney Circle, Castro Valley, CA 94546 and the property tax paid?

Assessed at $823,997, the tax amount paid for 18880 Sydney Circle, Castro Valley, CA 94546 is $9,591.

When was 18880 Sydney Circle, Castro Valley, CA 94546 last sold?

18880 Sydney Circle, Castro Valley, CA 94546 was last sold in 04/12/2024.

Ownership Information

View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.

Real Estate Reports:
Laura Pop-Badiu, May 07, 2026 Locked-In Owners, Mobile Renters: Homeowners Stay Put as Renters Move 3.7x More Across Largest U.S. Cities 
Renters became the primary drivers of long-distance mobility across the largest U.S. cities, moving 3.7 times more than owners in 2024, as high mortgage rates and housing costs kept many homeowners in place.
Eliza Theiss, Apr 23, 2026 $4.6M Hudson Yards Maintains Top Spot, Luxury Sales in Malba Set $2.5M Price Record for Queens
Despite prices declining, Hudson Yards remained the most expensive NYC neighborhood, but TriBeCa’s growth closed the gap to under $400,000, while Malba set a new historic price record for Queens at $2.5 million, securing the highest ranking ever for the borough at #5.
Eliza Theiss, Apr 15, 2026 2026 Q1 Foreclosure Report: Brooklyn Filings Fall Sharply, Bronx & Staten Island Hit New Peaks
Behind a deceptively mild citywide downtick, borough foreclosure markets pulled into significantly diverging paths as Brooklyn cases were nearly halved and the Bronx hit a new, record high. Meanwhile, Queens remained unchanged, Staten Island surged back up and Manhattan cooled slowly.
Research 100M+ property records powered by:
  • 2000+ governmental and public data sources
  • 80 dedicated analysts and researchers
  • 20+ years of real estate experience
Learn More

Past Sales & Property History for 18880 Sydney Circle, Castro Valley

Create a free account to view the complete sales history for 18880 Sydney Circle, Castro Valley, including title documents, transfer conditions, mortgages and liens.

Purchase date Purchase price Buyer name Seller name
04/04/2017 $710,000
10/01/1999 $320,000
       
       
       
Access the complete sales history for 18880 Sydney Circle, Castro Valley with a free account.
Sign up

Title Documents for 18880 Sydney Circle, Castro Valley

To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.

Date Type Amount Party 1 Party 2 Maturity Document Doc image
04/12/2024 Grant Deed to Revocable Trust
09/25/2017 Trust Transfer Deed
04/04/2017 Deed of Trust 04/01/2032
04/04/2017 Interspousal Transfer Deed
04/04/2017 Grant Deed
09/26/2001 Deed
10/01/1999 Deed
Unlock title documents, including buyer and seller information (when available).
Sign up

R: Recorded date
D: Document date

Property Taxes for 18880 Sydney Circle, Castro Valley

Access detailed property tax data for 18880 Sydney Circle, Castro Valley, CA 94546. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year: 2025-2026
Property tax $9,591
Market value $823,997

Assessment History for 18880 Sydney Circle, Castro Valley

Here's the assessment & property tax history for 18880 Sydney Circle, Castro Valley, including the evolution of the total tax rate and corresponding property tax.

Year Assessment value Total tax rate Property tax Year over year change
2025-2026 $823,997 1.164 $9,591 +0.69%
2024-2025 $807,844 1.1791 $9,525 -48.84%
2023-2024 $792,004 2.3508 $18,618 +101.36%
2022-2023 $776,477 1.1908 $9,246 +2.52%
2021-2022 $761,254 1.1848 $9,019 +2.28%

Permits for 18880 Sydney Circle, Castro Valley

The complete history of permits filed for 18880 Sydney Circle, Castro Valley, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.

Data not available for this property.

Castro Valley residential market stats

Median Sale Price
$989,000
-8.4% YoY
Median Price/Sqft
$669
3.4% YoY
Alameda County Median Sale Price
$965,000
-7.1% YoY

Access a detailed real estate market overview of Castro Valley so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Castro Valley and compare it to other neighborhoods in Alameda County.

Check out recently sold homes in Castro-Valley and see how their prices compare.

Risk

Create a free account to unlock extended information for 18880 Sydney Circle, Castro Valley, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).

FEMA flood zone(s) X (See more on map)
Fire hazard zone See more on map
Faults and tsunami inundation zone map
Landslides and liquefaction map

Transportation

Access the detailed traffic volume map for 18880 Sydney Circle, Castro Valley to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

View daily traffic map

Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance to school (mi)
Stanton Elementary School 6 Public K-5 492 0.52
Anchor Education, Inc. School NR Private 3-12 0 0.55
Sterling West San Francisco Campus NR Private 3-11 27 0.55
Chabot Elementary School 8 Public K-5 470 0.57
Anchor Education, Inc. NR Private 3-12 18 0.57

Nearest middle schools

Name Rating Type Grade range No of students Distance to school (mi)
Anchor Education, Inc. School NR Private 3-12 0 0.55
Sterling West San Francisco Campus NR Private 3-11 27 0.55
Anchor Education, Inc. NR Private 3-12 18 0.57
Castro Valley Virtual Academy 7 Public K-12 67 0.61
Seneca Family Of Agencies - James Baldwin Academy NR Private 4-12 75 0.69

Nearest high schools

Name Rating Type Grade range No of students Distance to school (mi)
Anchor Education, Inc. School NR Private 3-12 0 0.55
Sterling West San Francisco Campus NR Private 3-11 27 0.55
Anchor Education, Inc. NR Private 3-12 18 0.57
Redwood Continuation High School 3 Public 9-12 122 0.61
Roy A. Johnson High School NR Public 9-12 24 0.61

Data provided by GreatSchools.org © 2025. All rights reserved.

Neighbors for 18880 Sydney Circle, Castro Valley

Here are the neighbors for 18880 Sydney Circle, Castro Valley.

Address Square feet Purchase date Purchase price
19364 Stanton Pl, Castro Valley 1,567 02/04/2025 $271,000
19366 Stanton Pl, Castro Valley 1,567 07/12/2023
19384 Stanton Ave, Castro Valley 1,553 02/13/2024
18981 Carlton Ave, Castro Valley 1,860 08/05/2021
18819 Sydney Cir, Castro Valley 1,901 07/26/2016
18801 Sydney Cir, Castro Valley 1,997 03/05/1990 $286,000
2830 Jennifer Dr, Castro Valley 2,952 06/03/2021
18995 Carlton Ave, Castro Valley 1,988 04/04/2018
2845 Sydney Way, Castro Valley 1,856 03/27/2018 $875,000
19587 Carlton Ave, Castro Valley 2,116 04/06/2016 $750,000
18757 Sydney Cir, Castro Valley 1,914 11/06/2002
2820 Jennifer Dr, Castro Valley 1,526 07/15/2003 $485,000
19362 Stanton Pl, Castro Valley 1,624 10/11/2019 $905,000
18973 Carlton Ave, Castro Valley 1,100 08/29/2006 $515,000
18801 Carlton Ave, Castro Valley 2,236 10/31/2023 $1,215,000
18989 Carlton Ave, Castro Valley 1,439 02/04/2016 $500,000
18949 Carlton Ave, Castro Valley 2,028 03/27/1997 $275,000
18847 Carlton Ave, Castro Valley 1,064 03/04/2022
18725 Carlton Ave, Castro Valley 1,099
2847 Sydney Way, Castro Valley 1,264 09/23/1997 $206,000

Nearby ZIP Codes for 18880 Sydney Circle, Castro Valley

Not sure if we cover all the data-points you need? View sample full report View sample full report