21 South St
Westborough, MA 01581
1 bd 1 ba 525 sqft Built 1900 condo_townhome_rowhome_coop
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 | $223,600 | — | $223,600 | $3,642 |
| 2024 | $276,200 | — | $276,200 | $4,532 |
| 2023 | $164,600 | — | $164,600 | $2,772 |
| 2022 | $159,000 | — | $159,000 | $2,940 |
| 2021 | $141,900 | — | $141,900 | $2,631 |
| 2020 | $145,000 | — | $145,000 | $2,656 |
| 2019 | $150,300 | — | $150,300 | $2,755 |
| 2018 | $144,200 | — | $144,200 | $2,662 |
| 2017 | $117,900 | — | $117,900 | $2,099 |
| 2016 | $119,600 | — | $119,600 | $2,125 |
| 2015 | $114,400 | — | $114,400 | $2,127 |
| 2014 | $114,400 | — | $114,400 | $2,207 |
| 2006 | $114,400 | — | $114,400 | $1,586 |
Property facts
Year built
1900
Property type
condo_townhome_rowhome_coop
Stories
—
Beds
1
Baths
1
Living area
525 sqft
Lot size
—
ZIP code
01581
City
Westborough
Street
South St
Coordinates
42.26893, -71.61306
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 South St last sell?
No public-record sale is on file for 21 South St.
What is the current tax assessment for 21 South St?
The most recent total assessment for 21 South St (year 2025) is $223,600 with $3,642 in property tax.
When was 21 South St built?
21 South St was built in 1900.
How does 21 South St compare to others on South St?
We track 8 other properties on South St. Browse the list under "Other properties on South St" to compare beds, baths, and sale history.
What are the property facts for 21 South St?
21 South St is a 1 bed, 1 bath, 525 sqft condo_townhome_rowhome_coop.
Is 21 South St a flip candidate?
No — 21 South St does not appear in our flips dataset.
Is 21 South St a tax-appeal candidate?
No — 21 South 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
-3.8%
Implied 1-yr
-15.3%
2026 Q2
$487.6K
2026 Q3
$462.9K
ZIP 01581 — Median Price History + Forecast
Explore nearby
Geography
Other properties on South St