21 Diamond St
Chelmsford, MA 01863
3 bd 2 ba 2,198 sqft Built 1934 Lot 71,874 sqft single_family
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 | $385,300 | $330,600 | $715,900 | $9,951 |
| 2024 | $385,000 | $330,600 | $715,600 | $9,746 |
| 2023 | $246,900 | $336,700 | $583,600 | $8,386 |
| 2022 | $232,200 | $293,100 | $525,300 | $8,284 |
| 2021 | $215,900 | $269,200 | $485,100 | $7,635 |
| 2020 | $208,400 | $239,100 | $447,500 | $7,361 |
| 2019 | $194,400 | $247,000 | $441,400 | $7,217 |
| 2018 | $184,600 | $211,200 | $395,800 | $7,109 |
| 2017 | $177,600 | $198,200 | $375,800 | $6,734 |
| 2016 | $185,900 | $198,200 | $384,100 | $6,925 |
| 2015 | $172,300 | $180,300 | $352,600 | $6,594 |
| 2014 | $170,800 | $173,800 | $344,600 | $6,541 |
| 2006 | $120,700 | $179,200 | $299,900 | $3,935 |
| 2005 | $105,100 | $173,700 | $278,800 | $3,761 |
| 2003 | $110,600 | $157,300 | $267,900 | $3,764 |
Property facts
Year built
1934
Property type
single_family
Stories
—
Beds
3
Baths
2
Living area
2,198 sqft
Lot size
71,874 sqft
ZIP code
01863
City
Chelmsford
Street
Diamond St
Coordinates
42.64103, -71.39467
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 Diamond St last sell?
No public-record sale is on file for 21 Diamond St.
What is the current tax assessment for 21 Diamond St?
The most recent total assessment for 21 Diamond St (year 2025) is $715,900 with $9,951 in property tax.
When was 21 Diamond St built?
21 Diamond St was built in 1934.
How does 21 Diamond St compare to others on Diamond St?
We track 4 other properties on Diamond St. Browse the list under "Other properties on Diamond St" to compare beds, baths, and sale history.
What are the property facts for 21 Diamond St?
21 Diamond St is a 3 bed, 2 bath, 2,198 sqft, 71,874 sqft lot single_family.
Is 21 Diamond St a flip candidate?
No — 21 Diamond St does not appear in our flips dataset.
Is 21 Diamond St a tax-appeal candidate?
No — 21 Diamond 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
+0.2%
Implied 1-yr
+0.8%
2026 Q3
$740.4K
2026 Q4
$740.4K
ZIP 01863 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Diamond St