21 King St
Belmont, MA 02478
2 bd 1 ba 1,348 sqft Built 1926 condos
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 | $646,000 | — | $646,000 | $7,358 |
| 2024 | $630,000 | — | $630,000 | $6,653 |
| 2023 | $593,000 | — | $593,000 | $6,665 |
| 2022 | $630,000 | — | $630,000 | $7,283 |
| 2021 | $653,000 | — | $653,000 | $7,536 |
| 2020 | $595,000 | — | $595,000 | $6,545 |
| 2019 | $497,000 | — | $497,000 | $5,800 |
| 2018 | $361,000 | — | $361,000 | $4,386 |
| 2016 | $337,000 | — | $337,000 | $4,233 |
| 2015 | $296,000 | — | $296,000 | $3,818 |
| 2014 | $282,000 | — | $282,000 | $3,807 |
Property facts
Year built
1926
Property type
condos
Stories
—
Beds
2
Baths
1
Living area
1,348 sqft
Lot size
—
ZIP code
02478
City
Belmont
Street
King St
Coordinates
42.38168, -71.18635
Comparable properties nearby
Frequently asked questions
When did 21 King St last sell?
No public-record sale is on file for 21 King St.
What is the current tax assessment for 21 King St?
The most recent total assessment for 21 King St (year 2025) is $646,000 with $7,358 in property tax.
When was 21 King St built?
21 King St was built in 1926.
How does 21 King St compare to others on King St?
We track 2 other properties on King St. Browse the list under "Other properties on King St" to compare beds, baths, and sale history.
What are the property facts for 21 King St?
21 King St is a 2 bed, 1 bath, 1,348 sqft condos.
Is 21 King St a flip candidate?
No — 21 King St does not appear in our flips dataset.
Is 21 King St a tax-appeal candidate?
No — 21 King 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
-2.9%
Implied 1-yr
-11.6%
2026 Q2
$1.2M
2026 Q3
$1.16M
ZIP 02478 — Median Price History + Forecast
Explore nearby
Geography
Other properties on King St