21 William St
Mechanicville, NY 12118
— ba 3,530 sqft Built 1870 Lot 8,712 sqft multi_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 | $232,000 | $30,000 | $262,000 | $6,509 |
| 2024 | $160,800 | $21,200 | $182,000 | $5,395 |
| 2023 | $160,800 | $21,200 | $182,000 | $5,294 |
| 2022 | $127,800 | $21,200 | $149,000 | $5,231 |
| 2021 | $127,800 | $21,200 | $149,000 | $5,175 |
| 2020 | $127,800 | $21,200 | $149,000 | $5,167 |
| 2017 | $127,800 | $21,200 | $149,000 | $2,393 |
| 2016 | $127,800 | $21,200 | $149,000 | $2,357 |
| 2015 | $127,800 | $21,200 | $149,000 | $2,363 |
| 2014 | $85,000 | $15,000 | $100,000 | $4,951 |
| 2013 | $85,000 | $15,000 | $100,000 | $2,329 |
| 2012 | $85,000 | $15,000 | $100,000 | $2,352 |
| 2011 | $85,000 | $15,000 | $100,000 | $4,506 |
Property facts
Year built
1870
Property type
multi_family
Stories
—
Beds
—
Baths
—
Living area
3,530 sqft
Lot size
8,712 sqft
ZIP code
12118
City
Mechanicville
Street
William St
Coordinates
42.90578, -73.68568
Comparable properties nearby
Frequently asked questions
When did 21 William St last sell?
No public-record sale is on file for 21 William St.
What is the current tax assessment for 21 William St?
The most recent total assessment for 21 William St (year 2025) is $262,000 with $6,509 in property tax.
When was 21 William St built?
21 William St was built in 1870.
How does 21 William St compare to others on William St?
We track 8 other properties on William St. Browse the list under "Other properties on William St" to compare beds, baths, and sale history.
What are the property facts for 21 William St?
21 William St is a — bath, 3,530 sqft, 8,712 sqft lot multi_family.
Is 21 William St a flip candidate?
No — 21 William St does not appear in our flips dataset.
Is 21 William St a tax-appeal candidate?
No — 21 William 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
+3.0%
Implied 1-yr
+12.2%
2026 Q3
$549.5K
2026 Q4
$563.4K
ZIP 12118 — Median Price History + Forecast
Explore nearby
Geography
Other properties on William St