3143 8th St
Boulder, CO 80304
5 bd 4 ba 4,696 sqft Built 2009 Lot 5,663 sqft single_family
Most recent sale
$3,520,000
May 28, 2021
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Jul 19, 2024 | Sold | $3,700,000 | REcolorado |
| Apr 12, 2024 | Price changed | $3,950,000 | REcolorado |
| Mar 29, 2024 | Listed | $4,100,000 | REcolorado |
| May 28, 2021 | Sold | $3,520,000 | IRES |
| Jun 4, 2008 | Sold | $735,000 | Public Record |
| Mar 28, 2005 | Sold | $550,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $91,581 | $83,288 | $174,869 | $16,673 |
| 2024 | $91,581 | $83,288 | $174,869 | $17,317 |
| 2023 | $108,426 | $92,306 | $200,732 | $17,016 |
| 2022 | $80,001 | $66,289 | $146,290 | $13,585 |
| 2021 | $82,304 | $68,197 | $150,501 | $12,954 |
| 2020 | $66,388 | $60,489 | $126,877 | $11,044 |
| 2019 | $66,388 | $60,489 | $126,877 | $10,875 |
| 2018 | $67,543 | $48,528 | $116,071 | $10,063 |
| 2017 | $67,543 | $48,528 | $116,071 | $9,748 |
| 2016 | $67,652 | $45,133 | $112,785 | $9,763 |
| 2015 | $67,652 | $45,133 | $112,785 | $9,245 |
| 2014 | $50,379 | $38,686 | $89,065 | $7,657 |
| 2013 | $50,379 | $38,686 | $89,065 | $7,488 |
| 2011 | $66,148 | $28,417 | $94,565 | $7,852 |
| 2010 | $66,148 | $28,417 | $94,565 | $5,367 |
| 2009 | $66,148 | $28,417 | $94,565 | $15,320 |
| 2008 | — | $123,250 | $123,250 | $9,064 |
| 2007 | — | — | $46,956 | $3,336 |
Property facts
Year built
2009
Property type
single_family
Stories
2
Beds
5
Baths
4
Living area
4,696 sqft
Lot size
5,663 sqft
ZIP code
80304
City
Boulder
Street
8th St
Coordinates
40.03189, -105.28714
Comparable properties nearby
Investment analysis
Estimates based on local averages — not personalized adviceEstimated monthly rent
$21,120
Gross rental yield
7.20%
Implied cap rate
4.68%
Trend-extrapolated value
—
Frequently asked questions
When did 3143 8th St last sell?
3143 8th St most recently sold on May 28, 2021 for $3,520,000.
What is the current tax assessment for 3143 8th St?
The most recent total assessment for 3143 8th St (year 2025) is $174,869 with $16,673 in property tax.
How does 3143 8th St's assessment compare to its last sale price?
The current assessment is 95.0% below the last sale price of $3,520,000.
When was 3143 8th St built?
3143 8th St was built in 2009.
How does 3143 8th St compare to others on 8th St?
We track 8 other properties on 8th St. Browse the list under "Other properties on 8th St" to compare beds, baths, and sale history.
What are the property facts for 3143 8th St?
3143 8th St is a 5 bed, 4 bath, 4,696 sqft, 5,663 sqft lot single_family.
Is 3143 8th St a flip candidate?
No — 3143 8th St does not appear in our flips dataset.
Is 3143 8th St a tax-appeal candidate?
No — 3143 8th 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
+1.2%
Implied 1-yr
+5.0%
2026 Q3
$2.17M
2026 Q4
$2.2M
ZIP 80304 — Median Price History + Forecast
Explore nearby
Geography
Other properties on 8th St