21 Keystone Way
Andover, MA 01810
4 bd 6 ba 5,969 sqft Built 1991 Lot 44,431 sqft single_family
Most recent sale
$550,000
Nov 12, 1991
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Apr 18, 2024 | Listing removed | — | MLSPIN |
| Apr 2, 2024 | Listed | $1,695,000 | MLSPIN |
| Nov 12, 1991 | Sold | $550,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $934,800 | $566,500 | $1,501,300 | $18,751 |
| 2023 | $801,100 | $454,500 | $1,255,600 | $17,151 |
| 2022 | $718,500 | $409,700 | $1,128,200 | $16,472 |
| 2021 | $665,300 | $372,600 | $1,037,900 | $15,869 |
| 2020 | $655,200 | $372,600 | $1,027,800 | $15,427 |
| 2019 | $646,800 | $351,700 | $998,500 | $15,247 |
| 2018 | $599,900 | $341,700 | $941,600 | $14,727 |
| 2017 | $598,500 | $335,200 | $933,700 | $14,174 |
| 2016 | $602,800 | $352,600 | $955,400 | $14,159 |
| 2015 | $572,800 | $352,600 | $925,400 | $13,853 |
| 2014 | $513,400 | $356,600 | $870,000 | $13,207 |
| 2006 | $592,800 | $331,400 | $924,200 | $10,536 |
| 2005 | $610,900 | $276,900 | $887,800 | $10,219 |
| 2004 | $610,900 | $250,800 | $861,700 | $9,884 |
| 2003 | $571,200 | $250,800 | $822,000 | $9,560 |
Property facts
Year built
1991
Property type
single_family
Stories
—
Beds
4
Baths
6
Living area
5,969 sqft
Lot size
44,431 sqft
ZIP code
01810
City
Andover
Street
Keystone Way
Coordinates
42.62755, -71.18591
Comparable properties nearby
Frequently asked questions
When did 21 Keystone Way last sell?
21 Keystone Way most recently sold on Nov 12, 1991 for $550,000.
What is the current tax assessment for 21 Keystone Way?
The most recent total assessment for 21 Keystone Way (year 2025) is $1,501,300 with $18,751 in property tax.
How does 21 Keystone Way's assessment compare to its last sale price?
The current assessment is 173.0% above the last sale price of $550,000.
When was 21 Keystone Way built?
21 Keystone Way was built in 1991.
How does 21 Keystone Way compare to others on Keystone Way?
We track 5 other properties on Keystone Way. Browse the list under "Other properties on Keystone Way" to compare beds, baths, and sale history.
What are the property facts for 21 Keystone Way?
21 Keystone Way is a 4 bed, 6 bath, 5,969 sqft, 44,431 sqft lot single_family.
Is 21 Keystone Way a flip candidate?
No — 21 Keystone Way does not appear in our flips dataset.
Is 21 Keystone Way a tax-appeal candidate?
No — 21 Keystone Way is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+7.5%
Implied 1-yr
+29.8%
2026 Q3
$1.84M
2026 Q4
$1.9M
ZIP 01810 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Keystone Way