4509 Knollpark Cir
Antioch, CA 94531
4 bd 2 ba 1,915 sqft Built 1989 Lot 4,440 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 | $392,550 | $142,226 | $534,776 | $6,627 |
| 2024 | $392,550 | $142,226 | $534,776 | $6,475 |
| 2023 | $377,307 | $136,704 | $514,011 | $6,314 |
| 2022 | $369,909 | $134,024 | $503,933 | $6,215 |
| 2021 | $362,656 | $131,397 | $494,053 | $5,974 |
| 2020 | $358,938 | $130,050 | $488,988 | $5,973 |
| 2019 | $351,900 | $127,500 | $479,400 | $5,921 |
| 2018 | $290,700 | $127,500 | $418,200 | $5,151 |
| 2017 | $225,239 | $110,954 | $336,193 | $4,212 |
| 2016 | $220,823 | $108,779 | $329,602 | $4,124 |
| 2015 | $217,507 | $107,146 | $324,653 | $4,091 |
| 2014 | $213,247 | $105,048 | $318,295 | $3,975 |
| 2013 | $129,638 | $63,862 | $193,500 | $2,556 |
| 2012 | $129,638 | $63,862 | $193,500 | $2,383 |
| 2011 | $129,638 | $63,862 | $193,500 | $2,365 |
| 2010 | $155,000 | $50,000 | $205,000 | $2,501 |
| 2009 | $150,742 | $74,258 | $225,000 | $2,658 |
| 2008 | $168,047 | $59,674 | $227,721 | $2,601 |
| 2007 | $164,752 | $58,504 | $223,256 | $2,548 |
Property facts
Year built
1989
Property type
single_family
Stories
2
Beds
4
Baths
2
Living area
1,915 sqft
Lot size
4,440 sqft
ZIP code
94531
City
Antioch
Street
Knollpark Cir
Coordinates
37.96504, -121.76584
Comparable properties nearby
Frequently asked questions
When did 4509 Knollpark Cir last sell?
No public-record sale is on file for 4509 Knollpark Cir.
What is the current tax assessment for 4509 Knollpark Cir?
The most recent total assessment for 4509 Knollpark Cir (year 2025) is $534,776 with $6,627 in property tax.
When was 4509 Knollpark Cir built?
4509 Knollpark Cir was built in 1989.
How does 4509 Knollpark Cir compare to others on Knollpark Cir?
We track 8 other properties on Knollpark Cir. Browse the list under "Other properties on Knollpark Cir" to compare beds, baths, and sale history.
What are the property facts for 4509 Knollpark Cir?
4509 Knollpark Cir is a 4 bed, 2 bath, 1,915 sqft, 4,440 sqft lot single_family.
Is 4509 Knollpark Cir a flip candidate?
No — 4509 Knollpark Cir does not appear in our flips dataset.
Is 4509 Knollpark Cir a tax-appeal candidate?
No — 4509 Knollpark Cir is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-4.6%
Implied 1-yr
-18.4%
2026 Q3
$568.5K
2026 Q4
$568.5K
ZIP 94531 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Knollpark Cir