20717 Northampton St
Diamond Bar, CA 91789
4 bd 2 ba 1,753 sqft Built 1964 Lot 8,221 sqft single_family
Most recent sale
$960,000
Mar 8, 2022
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Mar 8, 2022 | Sold | $960,000 | MLS #219072910 |
| Feb 1, 2022 | Relisted | $875,000 | MLS #219072910 |
| Jan 27, 2022 | Listed | $875,000 | MLS #219072910 |
| Aug 10, 1973 | Sold | $37,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $262,967 | $755,791 | $1,018,758 | $12,778 |
| 2024 | $262,967 | $755,791 | $1,018,758 | $12,214 |
| 2023 | $252,756 | $726,444 | $979,200 | $11,919 |
| 2022 | $69,514 | $25,848 | $95,362 | $1,672 |
| 2021 | $68,151 | $25,342 | $93,493 | $1,632 |
| 2020 | $67,453 | $25,083 | $92,536 | $1,613 |
| 2019 | $66,131 | $24,592 | $90,723 | $1,586 |
| 2018 | $64,835 | $24,110 | $88,945 | $1,448 |
| 2017 | $63,564 | $23,638 | $87,202 | $1,392 |
| 2016 | $62,318 | $23,175 | $85,493 | $1,337 |
| 2015 | $61,382 | $22,827 | $84,209 | $1,339 |
| 2014 | $60,180 | $22,380 | $82,560 | $1,346 |
| 2013 | $59,909 | $22,279 | $82,188 | $1,328 |
| 2012 | $58,735 | $21,843 | $80,578 | $1,318 |
| 2010 | $57,584 | $21,415 | $78,999 | $1,264 |
| 2009 | $57,290 | $21,306 | $78,596 | $1,243 |
| 2008 | $56,167 | $20,889 | $77,056 | $1,200 |
| 2007 | $55,066 | $20,480 | $75,546 | $1,130 |
Property facts
Year built
1964
Property type
single_family
Stories
2
Beds
4
Baths
2
Living area
1,753 sqft
Lot size
8,221 sqft
ZIP code
91789
City
Diamond Bar
Street
Northampton St
Coordinates
34.00230, -117.85244
Comparable properties nearby
Investment analysis
Estimates based on local averages — not personalized adviceEstimated monthly rent
$5,610
Gross rental yield
7.01%
Implied cap rate
4.56%
Trend-extrapolated value
—
Frequently asked questions
When did 20717 Northampton St last sell?
20717 Northampton St most recently sold on Mar 8, 2022 for $960,000.
What is the current tax assessment for 20717 Northampton St?
The most recent total assessment for 20717 Northampton St (year 2025) is $1,018,758 with $12,778 in property tax.
How does 20717 Northampton St's assessment compare to its last sale price?
The current assessment is 6.1% above the last sale price of $960,000.
When was 20717 Northampton St built?
20717 Northampton St was built in 1964.
How does 20717 Northampton St compare to others on Northampton St?
We do not currently track other properties on Northampton St.
What are the property facts for 20717 Northampton St?
20717 Northampton St is a 4 bed, 2 bath, 1,753 sqft, 8,221 sqft lot single_family.
Is 20717 Northampton St a flip candidate?
No — 20717 Northampton St does not appear in our flips dataset.
Is 20717 Northampton St a tax-appeal candidate?
No — 20717 Northampton St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+2.3%
Implied 1-yr
+9.0%
2026 Q3
$1.61M
2026 Q4
$1.64M
ZIP 91789 — Median Price History + Forecast
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Geography