18521 Agate Ct
Castro Valley, CA 94546
4 bd 3 ba 2,696 sqft Built 1990 Lot 9,534 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $1,021,371 | $437,730 | $1,459,101 | $18,004 |
| 2024 | $1,021,371 | $437,730 | $1,459,101 | $17,618 |
| 2023 | $981,721 | $420,737 | $1,402,458 | $17,360 |
| 2022 | $962,472 | $412,488 | $1,374,960 | $17,048 |
| 2021 | $402,244 | $172,462 | $574,706 | $7,457 |
| 2020 | $398,121 | $170,694 | $568,815 | $7,286 |
| 2019 | $390,317 | $167,348 | $557,665 | $7,417 |
| 2018 | $382,664 | $164,067 | $546,731 | $7,206 |
| 2017 | $375,162 | $160,850 | $536,012 | $7,016 |
| 2016 | $367,806 | $157,696 | $525,502 | $6,675 |
| 2015 | $362,283 | $155,328 | $517,611 | $6,239 |
| 2014 | $355,188 | $152,286 | $507,474 | $6,161 |
| 2013 | $353,585 | $151,599 | $505,184 | $6,112 |
| 2012 | $346,652 | $148,627 | $495,279 | $5,988 |
| 2010 | $339,857 | $145,713 | $485,570 | $5,866 |
| 2009 | $337,317 | $144,624 | $481,941 | $5,891 |
| 2008 | $331,490 | $142,126 | $473,616 | $5,704 |
| 2007 | $324,991 | $139,339 | $464,330 | $5,561 |
Property facts
Year built
1990
Property type
single_family
Stories
2
Beds
4
Baths
3
Living area
2,696 sqft
Lot size
9,534 sqft
ZIP code
94546
City
Castro Valley
Street
Agate Ct
Coordinates
37.71026, -122.07476
Comparable properties nearby
Frequently asked questions
When did 18521 Agate Ct last sell?
No public-record sale is on file for 18521 Agate Ct.
What is the current tax assessment for 18521 Agate Ct?
The most recent total assessment for 18521 Agate Ct (year 2025) is $1,459,101 with $18,004 in property tax.
When was 18521 Agate Ct built?
18521 Agate Ct was built in 1990.
How does 18521 Agate Ct compare to others on Agate Ct?
We do not currently track other properties on Agate Ct.
What are the property facts for 18521 Agate Ct?
18521 Agate Ct is a 4 bed, 3 bath, 2,696 sqft, 9,534 sqft lot single_family.
Is 18521 Agate Ct a flip candidate?
No — 18521 Agate Ct does not appear in our flips dataset.
Is 18521 Agate Ct a tax-appeal candidate?
No — 18521 Agate Ct is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-2.1%
Implied 1-yr
-8.4%
2026 Q3
$875.4K
2026 Q4
$875.4K
ZIP 94546 — Median Price History + Forecast
Explore nearby
Geography