21 South St
Westborough, MA 01581
1 bd 1 ba 579 sqft Built 1987 condos
Most recent sale
$195,000
Apr 6, 2021
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Jun 20, 2023 | Sold | $253,500 | MLSPIN |
| Apr 12, 2023 | Listed | $250,000 | MLSPIN |
| Sep 28, 2022 | Listing removed | $249,900 | MLSPIN |
| Aug 13, 2022 | Listing removed | $249,900 | MLSPIN |
| Jun 4, 2022 | Listing removed | $1,500 | MLSPIN |
| Jun 2, 2022 | Listing removed | $1,500 | MLSPIN |
| May 18, 2022 | Listing removed | $1,500 | MLSPIN |
| May 1, 2022 | Listed for rent | $1,500 | MLSPIN |
| Apr 1, 2022 | Price changed | $249,900 | MLS #72958119 |
| Mar 27, 2022 | Listed | $295,000 | MLS #72958119 |
| Nov 7, 2021 | Listing removed | $1,500 | MLSPIN |
| Oct 30, 2021 | Listing removed | $1,500 | MLSPIN |
| Oct 10, 2021 | Listed for rent | $1,500 | MLSPIN |
| Apr 6, 2021 | Sold | $195,000 | Public Record |
| Nov 30, 2018 | Sold | $157,000 | MLS #72406378 |
| Oct 5, 2018 | Listed | $165,000 | MLS #72406378 |
| Aug 9, 2016 | Listing removed | $1,250 | MLSPIN |
| Aug 4, 2016 | Listed for rent | $1,250 | MLSPIN |
| Jun 26, 2013 | Listing removed | $1,075 | MLSPIN |
| Jun 13, 2013 | Listed for rent | $1,075 | MLSPIN |
| Aug 30, 2010 | Listing removed | $1,075 | MLSPIN |
| Aug 3, 2010 | Listed for rent | $1,075 | MLSPIN |
| Aug 27, 2004 | Sold | $139,900 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $237,900 | — | $237,900 | $3,875 |
| 2024 | $303,600 | — | $303,600 | $4,982 |
| 2023 | $172,400 | — | $172,400 | $2,903 |
| 2022 | $167,400 | — | $167,400 | $3,095 |
| 2021 | $149,800 | — | $149,800 | $2,777 |
| 2020 | $153,200 | — | $153,200 | $2,807 |
| 2019 | $138,900 | — | $138,900 | $2,546 |
| 2018 | $133,300 | — | $133,300 | $2,461 |
| 2017 | $132,400 | — | $132,400 | $2,357 |
| 2016 | $134,300 | — | $134,300 | $2,387 |
| 2015 | $128,500 | — | $128,500 | $2,389 |
| 2014 | $128,500 | — | $128,500 | $2,479 |
| 2006 | $138,200 | — | $138,200 | $1,915 |
Property facts
Year built
1987
Property type
condos
Stories
3
Beds
1
Baths
1
Living area
579 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 monthsInvestment analysis
Estimates based on local averages — not personalized adviceEstimated monthly rent
$1,679
Gross rental yield
10.33%
Implied cap rate
6.72%
Trend-extrapolated value
—
Frequently asked questions
When did 21 South St last sell?
21 South St most recently sold on Apr 6, 2021 for $195,000.
What is the current tax assessment for 21 South St?
The most recent total assessment for 21 South St (year 2025) is $237,900 with $3,875 in property tax.
How does 21 South St's assessment compare to its last sale price?
The current assessment is 22.0% above the last sale price of $195,000.
When was 21 South St built?
21 South St was built in 1987.
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, 579 sqft condos.
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