870 12th St
Boulder, CO 80302
4 bd 4 ba 3,608 sqft Built 1907 Lot 9,169 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 | $83,744 | $66,731 | $150,475 | $14,347 |
| 2024 | $83,744 | $66,731 | $150,475 | $13,943 |
| 2023 | $94,349 | $67,998 | $162,347 | $13,701 |
| 2022 | $76,339 | $55,711 | $132,050 | $12,262 |
| 2021 | $78,536 | $57,314 | $135,850 | $11,768 |
| 2020 | $79,723 | $53,125 | $132,848 | $11,563 |
| 2019 | $79,723 | $53,125 | $132,848 | $11,386 |
| 2018 | $72,590 | $48,384 | $120,974 | $10,488 |
| 2017 | $72,590 | $48,384 | $120,974 | $10,160 |
| 2016 | $63,815 | $42,506 | $106,321 | $9,203 |
| 2015 | $63,815 | $42,506 | $106,321 | $8,715 |
| 2014 | $35,263 | $34,308 | $69,571 | $5,981 |
| 2013 | $35,263 | $34,308 | $69,571 | $5,849 |
| 2011 | $37,094 | $30,885 | $67,979 | $5,644 |
| 2010 | $37,094 | $30,885 | $67,979 | $5,007 |
| 2009 | $37,094 | $30,885 | $67,979 | $4,675 |
| 2008 | $26,710 | $37,810 | $64,520 | $4,745 |
Property facts
Year built
1907
Property type
single_family
Stories
2
Beds
4
Baths
4
Living area
3,608 sqft
Lot size
9,169 sqft
ZIP code
80302
City
Boulder
Street
12th St
Coordinates
40.00323, -105.27707
Comparable properties nearby
Frequently asked questions
When did 870 12th St last sell?
No public-record sale is on file for 870 12th St.
What is the current tax assessment for 870 12th St?
The most recent total assessment for 870 12th St (year 2025) is $150,475 with $14,347 in property tax.
When was 870 12th St built?
870 12th St was built in 1907.
How does 870 12th St compare to others on 12th St?
We track 8 other properties on 12th St. Browse the list under "Other properties on 12th St" to compare beds, baths, and sale history.
What are the property facts for 870 12th St?
870 12th St is a 4 bed, 4 bath, 3,608 sqft, 9,169 sqft lot single_family.
Is 870 12th St a flip candidate?
No — 870 12th St does not appear in our flips dataset.
Is 870 12th St a tax-appeal candidate?
No — 870 12th 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 12th St