3997 121st Ave
Thornton, CO 80241
2 bd 1 ba 1,240 sqft Built 1997 Lot 1,166 sqft townhomes
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 | $19,990 | $5,440 | $25,430 | $2,862 |
| 2023 | $22,260 | $3,860 | $26,120 | $2,293 |
| 2022 | $18,430 | $1,040 | $19,470 | $2,144 |
| 2021 | $18,960 | $1,070 | $20,030 | $2,216 |
| 2020 | $18,720 | $1,070 | $19,790 | $2,207 |
| 2019 | $18,720 | $1,070 | $19,790 | $2,212 |
| 2018 | $15,630 | $1,080 | $16,710 | $1,922 |
| 2017 | $15,630 | $1,080 | $16,710 | $1,748 |
| 2016 | $11,690 | $1,190 | $12,880 | $1,384 |
| 2015 | $12,810 | $1,190 | $14,000 | $1,502 |
| 2014 | $6,120 | $1,190 | $7,310 | $806 |
| 2013 | $6,120 | $1,190 | $7,310 | $803 |
| 2011 | $6,980 | $1,190 | $8,170 | $911 |
| 2010 | $6,980 | $1,190 | $8,170 | $1,188 |
| 2009 | $8,410 | $2,230 | $10,640 | $1,185 |
| 2007 | $9,370 | $2,230 | $11,600 | $1,227 |
Property facts
Year built
1997
Property type
townhomes
Stories
1
Beds
2
Baths
1
Living area
1,240 sqft
Lot size
1,166 sqft
ZIP code
80241
City
Thornton
Street
121st Ave
Coordinates
39.91710, -104.94062
Comparable properties nearby
Frequently asked questions
When did 3997 121st Ave last sell?
No public-record sale is on file for 3997 121st Ave.
What is the current tax assessment for 3997 121st Ave?
The most recent total assessment for 3997 121st Ave (year 2025) is $25,430 with $2,862 in property tax.
When was 3997 121st Ave built?
3997 121st Ave was built in 1997.
How does 3997 121st Ave compare to others on 121st Ave?
We track 8 other properties on 121st Ave. Browse the list under "Other properties on 121st Ave" to compare beds, baths, and sale history.
What are the property facts for 3997 121st Ave?
3997 121st Ave is a 2 bed, 1 bath, 1,240 sqft, 1,166 sqft lot townhomes.
Is 3997 121st Ave a flip candidate?
No — 3997 121st Ave does not appear in our flips dataset.
Is 3997 121st Ave a tax-appeal candidate?
No — 3997 121st 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
+2.1%
Implied 1-yr
+8.4%
2026 Q3
$570.8K
2026 Q4
$581.4K
ZIP 80241 — Median Price History + Forecast
Explore nearby
Geography
Other properties on 121st Ave