321 Mountain Ave
Monrovia, CA 91016
4 bd 3 ba 2,448 sqft Built 1965 Lot 6,397 sqft single_family
Most recent sale
$510,000
Oct 17, 2003
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Feb 13, 2023 | Sold | $1,272,500 | Public Record |
| Jan 18, 2023 | Listed | $1,325,000 | CRISNET |
| Aug 2, 2022 | Price changed | $1,375,000 | MLS #P1-9818 |
| Jun 30, 2022 | Price changed | $1,399,000 | MLS #P1-9818 |
| Jun 3, 2022 | Listed | $1,475,000 | MLS #P1-9818 |
| Oct 17, 2003 | Sold | $510,000 | Public Record |
| May 3, 2000 | Sold | $320,000 | Public Record |
| Jul 12, 1996 | Sold | $237,500 | Public Record |
| Jun 27, 1985 | Sold | $150,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $423,546 | $900,362 | $1,323,908 | $17,752 |
| 2024 | $423,546 | $900,362 | $1,323,908 | $17,332 |
| 2023 | $317,434 | $484,033 | $801,467 | $10,829 |
| 2022 | $311,210 | $474,543 | $785,753 | $10,513 |
| 2021 | $305,108 | $465,239 | $770,347 | $10,302 |
| 2020 | $301,980 | $460,469 | $762,449 | $9,984 |
| 2019 | $296,059 | $451,441 | $747,500 | $9,806 |
| 2018 | $290,254 | $442,590 | $732,844 | $9,540 |
| 2017 | $284,563 | $433,912 | $718,475 | $9,353 |
| 2016 | $278,984 | $425,404 | $704,388 | $9,161 |
| 2015 | $274,794 | $419,015 | $693,809 | $8,958 |
| 2014 | $269,412 | $410,808 | $680,220 | $8,861 |
| 2013 | $268,195 | $408,952 | $677,147 | $8,822 |
| 2012 | $262,937 | $400,934 | $663,871 | $8,677 |
| 2010 | $255,856 | $390,136 | $645,992 | $8,332 |
| 2009 | $256,464 | $391,063 | $647,527 | $8,266 |
| 2008 | $251,436 | $383,396 | $634,832 | $8,028 |
| 2007 | $246,506 | $375,879 | $622,385 | $7,882 |
Property facts
Year built
1965
Property type
single_family
Stories
2
Beds
4
Baths
3
Living area
2,448 sqft
Lot size
6,397 sqft
ZIP code
91016
City
Monrovia
Street
Mountain Ave
Coordinates
34.15694, -117.98830
Comparable properties nearby
Frequently asked questions
When did 321 Mountain Ave last sell?
321 Mountain Ave most recently sold on Oct 17, 2003 for $510,000.
What is the current tax assessment for 321 Mountain Ave?
The most recent total assessment for 321 Mountain Ave (year 2025) is $1,323,908 with $17,752 in property tax.
How does 321 Mountain Ave's assessment compare to its last sale price?
The current assessment is 159.6% above the last sale price of $510,000.
When was 321 Mountain Ave built?
321 Mountain Ave was built in 1965.
How does 321 Mountain Ave compare to others on Mountain Ave?
We track 8 other properties on Mountain Ave. Browse the list under "Other properties on Mountain Ave" to compare beds, baths, and sale history.
What are the property facts for 321 Mountain Ave?
321 Mountain Ave is a 4 bed, 3 bath, 2,448 sqft, 6,397 sqft lot single_family.
Is 321 Mountain Ave a flip candidate?
No — 321 Mountain Ave does not appear in our flips dataset.
Is 321 Mountain Ave a tax-appeal candidate?
No — 321 Mountain Ave is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+14.0%
Implied 1-yr
+55.8%
2026 Q3
$3.12M
2026 Q4
$3.35M
ZIP 91016 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Mountain Ave