340 21st St
Boulder, CO 80302
3 bd 3 ba 2,095 sqft Built 1955 Lot 8,516 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 | $30,763 | $62,275 | $93,038 | $8,951 |
| 2024 | $30,763 | $62,275 | $93,038 | $8,315 |
| 2023 | $31,879 | $65,526 | $97,405 | $8,168 |
| 2022 | $28,259 | $53,689 | $81,948 | $7,685 |
| 2021 | $29,072 | $55,234 | $84,306 | $7,331 |
| 2020 | $32,668 | $46,046 | $78,714 | $6,851 |
| 2019 | $32,668 | $46,046 | $78,714 | $6,746 |
| 2018 | $25,344 | $41,256 | $66,600 | $5,774 |
| 2017 | $25,344 | $41,256 | $66,600 | $5,593 |
| 2016 | $24,819 | $35,263 | $60,082 | $5,201 |
| 2015 | $24,819 | $35,263 | $60,082 | $4,925 |
| 2014 | $27,207 | $23,402 | $50,609 | $4,351 |
| 2013 | $27,207 | $23,402 | $50,609 | $4,255 |
| 2011 | $20,457 | $29,770 | $50,227 | $4,170 |
| 2010 | $20,457 | $29,770 | $50,227 | $3,956 |
| 2009 | $20,457 | $29,770 | $50,227 | $3,694 |
| 2008 | $16,550 | $31,840 | $48,390 | $3,559 |
Property facts
Year built
1955
Property type
single_family
Stories
1
Beds
3
Baths
3
Living area
2,095 sqft
Lot size
8,516 sqft
ZIP code
80302
City
Boulder
Street
21st St
Coordinates
39.99670, -105.26619
Comparable properties nearby
Frequently asked questions
When did 340 21st St last sell?
No public-record sale is on file for 340 21st St.
What is the current tax assessment for 340 21st St?
The most recent total assessment for 340 21st St (year 2025) is $93,038 with $8,951 in property tax.
When was 340 21st St built?
340 21st St was built in 1955.
How does 340 21st St compare to others on 21st St?
We track 8 other properties on 21st St. Browse the list under "Other properties on 21st St" to compare beds, baths, and sale history.
What are the property facts for 340 21st St?
340 21st St is a 3 bed, 3 bath, 2,095 sqft, 8,516 sqft lot single_family.
Is 340 21st St a flip candidate?
No — 340 21st St does not appear in our flips dataset.
Is 340 21st St a tax-appeal candidate?
No — 340 21st 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
-0.3%
Implied 1-yr
-1.2%
2026 Q3
$1.68M
2026 Q4
$1.67M
ZIP 80302 — Median Price History + Forecast
Explore nearby
Geography
Other properties on 21st St