800 Union Ave
Boulder, CO 80304
5 bd 5 ba 4,210 sqft Built 2024 Lot 9,246 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 | $13,859 | $71,619 | $85,478 | $8,150 |
| 2024 | $13,859 | $71,619 | $85,478 | $5,994 |
| 2023 | $7,767 | $69,900 | $77,667 | $6,388 |
| 2022 | $5,869 | $52,817 | $58,686 | $5,449 |
| 2021 | $6,037 | $54,337 | $60,374 | $5,196 |
| 2020 | $11,261 | $45,045 | $56,306 | $4,901 |
| 2019 | $11,261 | $45,045 | $56,306 | $4,826 |
| 2018 | $18,929 | $31,104 | $50,033 | $4,337 |
| 2017 | $18,929 | $31,104 | $50,033 | $4,202 |
| 2016 | $9,990 | $39,959 | $49,949 | $4,323 |
| 2015 | $9,990 | $39,959 | $49,949 | $4,094 |
| 2014 | $25,727 | $13,134 | $38,861 | $3,341 |
| 2013 | $25,727 | $13,134 | $38,861 | $3,267 |
| 2011 | $16,636 | $20,059 | $36,695 | $3,046 |
| 2010 | $16,636 | $20,059 | $36,695 | $3,359 |
| 2009 | $16,636 | $20,059 | $36,695 | $3,136 |
| 2008 | $12,250 | $27,860 | $40,110 | $2,950 |
Property facts
Year built
2024
Property type
single_family
Stories
1
Beds
5
Baths
5
Living area
4,210 sqft
Lot size
9,246 sqft
ZIP code
80304
City
Boulder
Street
Union Ave
Coordinates
40.05287, -105.28779
Comparable properties nearby
Frequently asked questions
When did 800 Union Ave last sell?
No public-record sale is on file for 800 Union Ave.
What is the current tax assessment for 800 Union Ave?
The most recent total assessment for 800 Union Ave (year 2025) is $85,478 with $8,150 in property tax.
When was 800 Union Ave built?
800 Union Ave was built in 2024.
How does 800 Union Ave compare to others on Union Ave?
We track 8 other properties on Union Ave. Browse the list under "Other properties on Union Ave" to compare beds, baths, and sale history.
What are the property facts for 800 Union Ave?
800 Union Ave is a 5 bed, 5 bath, 4,210 sqft, 9,246 sqft lot single_family.
Is 800 Union Ave a flip candidate?
No — 800 Union Ave does not appear in our flips dataset.
Is 800 Union Ave a tax-appeal candidate?
No — 800 Union Ave 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 Union Ave