421 Mapleton Ave
Boulder, CO 80304
1 bd 1 ba 618 sqft Built 1906 condos
Most recent sale
$605,000
Apr 18, 2024
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Apr 18, 2024 | Sold | $605,000 | IRES |
| Mar 15, 2024 | Listing removed | — | REcolorado |
| Mar 7, 2024 | Listed | $699,000 | REcolorado |
| Nov 3, 2023 | Price changed | $699,000 | IRES |
| Oct 6, 2023 | Listed | $750,000 | IRES |
| Dec 5, 2016 | Sold | $525,000 | Public Record |
| Feb 15, 2001 | Sold | $290,100 | Public Record |
| Feb 5, 1999 | Sold | $194,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $43,106 | — | $43,106 | $4,110 |
| 2024 | $43,106 | — | $43,106 | $3,109 |
| 2023 | $39,072 | — | $39,072 | $3,055 |
| 2022 | $34,076 | — | $34,076 | $3,164 |
| 2021 | $35,056 | — | $35,056 | $3,017 |
| 2020 | $35,214 | — | $35,214 | $3,065 |
| 2019 | $35,214 | — | $35,214 | $3,018 |
| 2018 | $29,246 | — | $29,246 | $2,535 |
| 2017 | $29,246 | — | $29,246 | $2,456 |
| 2016 | $33,647 | — | $33,647 | $2,912 |
| 2015 | $33,647 | — | $33,647 | $2,758 |
| 2014 | $23,641 | — | $23,641 | $2,032 |
| 2013 | $23,641 | — | $23,641 | $1,987 |
| 2011 | $24,437 | — | $24,437 | $2,029 |
| 2010 | $24,437 | — | $24,437 | $2,452 |
| 2009 | $24,437 | — | $24,437 | $2,289 |
| 2008 | $27,590 | — | $27,590 | $2,029 |
| 2007 | — | — | $27,589 | $1,960 |
Property facts
Year built
1906
Property type
condos
Stories
2
Beds
1
Baths
1
Living area
618 sqft
Lot size
—
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 monthsInvestment analysis
Estimates based on local averages — not personalized adviceEstimated monthly rent
$3,630
Gross rental yield
7.20%
Implied cap rate
4.68%
Trend-extrapolated value
—
Frequently asked questions
When did 421 Mapleton Ave last sell?
421 Mapleton Ave most recently sold on Apr 18, 2024 for $605,000.
What is the current tax assessment for 421 Mapleton Ave?
The most recent total assessment for 421 Mapleton Ave (year 2025) is $43,106 with $4,110 in property tax.
How does 421 Mapleton Ave's assessment compare to its last sale price?
The current assessment is 92.9% below the last sale price of $605,000.
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, 618 sqft condos.
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