21870 Knob Hill Pl
Ashburn, VA 20148
5 ba 3,824 sqft Built 2010 Lot 9,148 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 | $716,260 | $324,600 | $1,040,860 | $8,378 |
| 2023 | $562,190 | $309,600 | $871,790 | $7,628 |
| 2022 | $566,230 | $269,600 | $835,830 | $7,438 |
| 2021 | $490,980 | $259,600 | $750,580 | $7,355 |
| 2020 | $480,490 | $199,600 | $680,090 | $7,038 |
| 2019 | $462,400 | $199,600 | $662,000 | $6,917 |
| 2018 | $441,410 | $189,600 | $631,010 | $6,846 |
| 2017 | $423,540 | $189,600 | $613,140 | $6,897 |
| 2016 | $395,660 | $189,600 | $585,260 | $6,701 |
| 2015 | $408,730 | $189,600 | $598,330 | $6,791 |
| 2014 | $365,410 | $179,600 | $545,010 | $6,294 |
| 2013 | $338,270 | $179,600 | $517,870 | $6,240 |
| 2012 | $278,600 | $179,600 | $458,200 | $5,658 |
| 2011 | $284,400 | $159,600 | $444,000 | $5,705 |
| 2009 | — | $159,600 | $159,600 | $2,173 |
| 2008 | — | $199,600 | $199,600 | $2,275 |
| 2007 | — | $149,600 | $149,600 | $1,436 |
Property facts
Year built
2010
Property type
single_family
Stories
2
Beds
—
Baths
5
Living area
3,824 sqft
Lot size
9,148 sqft
ZIP code
20148
City
Ashburn
Street
Knob Hill Pl
Coordinates
39.01263, -77.55748
Comparable properties nearby
Frequently asked questions
When did 21870 Knob Hill Pl last sell?
No public-record sale is on file for 21870 Knob Hill Pl.
What is the current tax assessment for 21870 Knob Hill Pl?
The most recent total assessment for 21870 Knob Hill Pl (year 2025) is $1,040,860 with $8,378 in property tax.
When was 21870 Knob Hill Pl built?
21870 Knob Hill Pl was built in 2010.
How does 21870 Knob Hill Pl compare to others on Knob Hill Pl?
We track 8 other properties on Knob Hill Pl. Browse the list under "Other properties on Knob Hill Pl" to compare beds, baths, and sale history.
What are the property facts for 21870 Knob Hill Pl?
21870 Knob Hill Pl is a 5 bath, 3,824 sqft, 9,148 sqft lot single_family.
Is 21870 Knob Hill Pl a flip candidate?
No — 21870 Knob Hill Pl does not appear in our flips dataset.
Is 21870 Knob Hill Pl a tax-appeal candidate?
No — 21870 Knob Hill Pl is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+1.0%
Implied 1-yr
+4.0%
2026 Q3
$1.01M
2026 Q4
$1.01M
ZIP 20148 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Knob Hill Pl