421 Mapleton Ave
Boulder, CO 80304
1 bd 1 ba 616 sqft Built 1906 Lot 23,658 sqft condo
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 | $40,906 | — | $40,906 | $3,304 |
| 2024 | $40,906 | — | $40,906 | $2,914 |
| 2023 | $36,846 | — | $36,846 | $2,863 |
| 2022 | $32,755 | — | $32,755 | $3,041 |
| 2021 | $33,698 | — | $33,698 | $2,900 |
| 2020 | $33,591 | — | $33,591 | $2,923 |
| 2019 | $33,591 | — | $33,591 | $2,879 |
| 2018 | $29,196 | — | $29,196 | $2,531 |
| 2017 | $29,196 | — | $29,196 | $2,452 |
| 2016 | $33,647 | — | $33,647 | $2,912 |
| 2015 | $33,647 | — | $33,647 | $2,758 |
| 2014 | $23,593 | — | $23,593 | $2,028 |
| 2013 | $23,593 | — | $23,593 | $1,983 |
| 2011 | $23,124 | — | $23,124 | $1,920 |
| 2010 | $23,124 | — | $23,124 | $2,233 |
| 2009 | $23,124 | — | $23,124 | $2,085 |
| 2008 | $28,220 | — | $28,220 | $2,075 |
Property facts
Year built
1906
Property type
condo
Stories
1
Beds
1
Baths
1
Living area
616 sqft
Lot size
23,658 sqft
ZIP code
80304
City
Boulder
Street
Mapleton Ave
Coordinates
40.02094, -105.29076
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 421 Mapleton Ave last sell?
No public-record sale is on file for 421 Mapleton Ave.
What is the current tax assessment for 421 Mapleton Ave?
The most recent total assessment for 421 Mapleton Ave (year 2025) is $40,906 with $3,304 in property tax.
When was 421 Mapleton Ave built?
421 Mapleton Ave was built in 1906.
How does 421 Mapleton Ave compare to others on Mapleton Ave?
We track 8 other properties on Mapleton Ave. Browse the list under "Other properties on Mapleton Ave" to compare beds, baths, and sale history.
What are the property facts for 421 Mapleton Ave?
421 Mapleton Ave is a 1 bed, 1 bath, 616 sqft, 23,658 sqft lot condo.
Is 421 Mapleton Ave a flip candidate?
No — 421 Mapleton Ave does not appear in our flips dataset.
Is 421 Mapleton Ave a tax-appeal candidate?
No — 421 Mapleton 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
+5.1%
Implied 1-yr
+20.2%
2026 Q3
$2.3M
2026 Q4
$2.39M
ZIP 80304 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Mapleton Ave