423 South Ave
New Canaan, CT 06840
5 bd 7 ba 6,050 sqft Built 2013 Lot 13,068 sqft single_family
Most recent sale
$2,550,000
Mar 28, 2019
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Oct 20, 2023 | Sold | $3,375,000 | SMARTMLS |
| Jul 24, 2023 | Listed | $3,450,000 | SMARTMLS |
| May 10, 2022 | Listed | $3,290,000 | MLS #170489078 |
| Mar 28, 2019 | Sold | $2,550,000 | Public Record |
| Sep 3, 2018 | Price changed | $2,799,000 | MLS #141921 |
| Jul 17, 2018 | Price changed | $2,995,000 | MLS #141921 |
| Apr 16, 2018 | Price changed | $2,995,000 | MLS #170051129 |
| Feb 28, 2018 | Listed | $3,199,000 | MLS #170051129 |
| Jun 4, 2013 | Sold | $1,100,000 | Public Record |
| Jun 2, 2011 | Listing removed | $999,000 | SMARTMLS |
| Feb 19, 2011 | Price changed | $999,000 | MLS #98477592 |
| Oct 26, 2010 | Price changed | $1,095,000 | MLS #98477592 |
| Sep 20, 2010 | Listed | $1,185,000 | MLS #98477592 |
| Jul 29, 1999 | Sold | $635,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $1,177,960 | $945,000 | $2,122,960 | $35,432 |
| 2023 | $958,440 | $725,760 | $1,684,200 | $31,899 |
| 2022 | $958,440 | $725,760 | $1,684,200 | $30,939 |
| 2021 | $958,440 | $725,760 | $1,684,200 | $30,585 |
| 2020 | $958,440 | $725,760 | $1,684,200 | $30,585 |
| 2019 | $958,440 | $725,760 | $1,684,200 | $30,720 |
| 2018 | $1,249,640 | $581,000 | $1,830,640 | $32,234 |
| 2017 | $1,168,650 | $581,000 | $1,749,650 | $30,250 |
| 2016 | $1,168,650 | $581,000 | $1,749,650 | $29,562 |
| 2015 | $1,168,720 | $616,000 | $1,784,720 | $29,559 |
| 2013 | $156,030 | $654,500 | $810,530 | $12,339 |
| 2006 | $251,500 | $320,200 | $571,700 | $8,393 |
| 2005 | $251,500 | $320,200 | $571,700 | $7,998 |
| 2004 | $251,500 | $320,200 | $571,700 | $7,564 |
| 2003 | $241,290 | $266,070 | $507,360 | $7,098 |
Property facts
Year built
2013
Property type
single_family
Stories
—
Beds
5
Baths
7
Living area
6,050 sqft
Lot size
13,068 sqft
ZIP code
06840
City
New Canaan
Street
South Ave
Coordinates
41.13278, -73.48827
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 423 South Ave last sell?
423 South Ave most recently sold on Mar 28, 2019 for $2,550,000.
What is the current tax assessment for 423 South Ave?
The most recent total assessment for 423 South Ave (year 2025) is $2,122,960 with $35,432 in property tax.
How does 423 South Ave's assessment compare to its last sale price?
The current assessment is 16.7% below the last sale price of $2,550,000.
When was 423 South Ave built?
423 South Ave was built in 2013.
How does 423 South Ave compare to others on South Ave?
We track 8 other properties on South Ave. Browse the list under "Other properties on South Ave" to compare beds, baths, and sale history.
What are the property facts for 423 South Ave?
423 South Ave is a 5 bed, 7 bath, 6,050 sqft, 13,068 sqft lot single_family.
Is 423 South Ave a flip candidate?
No — 423 South Ave does not appear in our flips dataset.
Is 423 South Ave a tax-appeal candidate?
No — 423 South Ave is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-0.2%
Implied 1-yr
-0.8%
2026 Q3
$2.61M
2026 Q4
$2.61M
ZIP 06840 — Median Price History + Forecast
Explore nearby
Geography
Other properties on South Ave