21 William St
Danbury, CT 06810
3 bd 3 ba 2,116 sqft Built 1900 Lot 2,614 sqft single_family
Most recent sale
$105,000
Oct 20, 2000
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Nov 16, 2022 | Sold | $290,000 | SMARTMLS |
| Oct 7, 2022 | Listed | $329,000 | MLS #170527174 |
| Oct 20, 2000 | Sold | $105,000 | Public Record |
| Nov 5, 1998 | Sold | $128,000 | Public Record |
| Jul 24, 1986 | Sold | $117,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $151,970 | $44,660 | $196,630 | $4,914 |
| 2023 | $151,970 | $44,660 | $196,630 | $4,587 |
| 2022 | $91,900 | $45,200 | $137,100 | $3,869 |
| 2021 | $91,900 | $45,200 | $137,100 | $3,784 |
| 2020 | $91,900 | $45,200 | $137,100 | $3,784 |
| 2019 | $91,900 | $45,200 | $137,100 | $3,784 |
| 2018 | $91,900 | $45,200 | $137,100 | $3,784 |
| 2017 | $77,300 | $43,000 | $120,300 | $3,483 |
| 2016 | $77,300 | $43,000 | $120,300 | $3,450 |
| 2015 | $77,300 | $43,000 | $120,300 | $3,400 |
| 2013 | $77,300 | $43,000 | $120,300 | $3,224 |
| 2006 | $99,500 | $22,000 | $121,500 | $2,679 |
| 2004 | $99,500 | $22,000 | $121,500 | $3,020 |
| 2003 | $99,500 | $22,000 | $121,500 | $2,951 |
Property facts
Year built
1900
Property type
single_family
Stories
—
Beds
3
Baths
3
Living area
2,116 sqft
Lot size
2,614 sqft
ZIP code
06810
City
Danbury
Street
William St
Coordinates
41.38960, -73.45485
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 William St last sell?
21 William St most recently sold on Oct 20, 2000 for $105,000.
What is the current tax assessment for 21 William St?
The most recent total assessment for 21 William St (year 2025) is $196,630 with $4,914 in property tax.
How does 21 William St's assessment compare to its last sale price?
The current assessment is 87.3% above the last sale price of $105,000.
When was 21 William St built?
21 William St was built in 1900.
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 3 bed, 3 bath, 2,116 sqft, 2,614 sqft lot single_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
-0.7%
Implied 1-yr
-2.8%
2026 Q2
$465.8K
2026 Q3
$462.5K
ZIP 06810 — Median Price History + Forecast
Explore nearby
Geography
Other properties on William St