400 Mapleton Ave
Boulder, CO 80304
5 bd 6 ba 3,476 sqft Built 1905 Lot 6,794 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 | $121,681 | $101,319 | $223,000 | $21,343 |
| 2024 | $121,681 | $101,319 | $223,000 | $20,760 |
| 2023 | $136,050 | $103,863 | $239,913 | $20,400 |
| 2022 | $90,559 | $78,382 | $168,941 | $15,688 |
| 2021 | $93,165 | $80,638 | $173,803 | $14,960 |
| 2020 | $117,653 | $78,436 | $196,089 | $17,068 |
| 2019 | $117,653 | $78,436 | $196,089 | $16,807 |
| 2018 | $97,358 | $64,872 | $162,230 | $14,065 |
| 2017 | $97,358 | $64,872 | $162,230 | $13,625 |
| 2016 | $75,676 | $54,287 | $129,963 | $11,250 |
| 2015 | $75,676 | $54,287 | $129,963 | $10,653 |
| 2014 | $64,866 | $35,263 | $100,129 | $8,608 |
| 2013 | $64,866 | $35,263 | $100,129 | $8,418 |
| 2011 | $84,058 | $24,437 | $108,495 | $9,008 |
| 2010 | $84,058 | $24,437 | $108,495 | $9,007 |
| 2009 | $84,058 | $24,437 | $108,495 | $8,410 |
| 2008 | $36,620 | $42,980 | $79,600 | $5,854 |
Property facts
Year built
1905
Property type
single_family
Stories
—
Beds
5
Baths
6
Living area
3,476 sqft
Lot size
6,794 sqft
ZIP code
80304
City
Boulder
Street
Mapleton Ave
Coordinates
40.02019, -105.29129
Comparable properties nearby
Frequently asked questions
When did 400 Mapleton Ave last sell?
No public-record sale is on file for 400 Mapleton Ave.
What is the current tax assessment for 400 Mapleton Ave?
The most recent total assessment for 400 Mapleton Ave (year 2025) is $223,000 with $21,343 in property tax.
When was 400 Mapleton Ave built?
400 Mapleton Ave was built in 1905.
How does 400 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 400 Mapleton Ave?
400 Mapleton Ave is a 5 bed, 6 bath, 3,476 sqft, 6,794 sqft lot single_family.
Is 400 Mapleton Ave a flip candidate?
No — 400 Mapleton Ave does not appear in our flips dataset.
Is 400 Mapleton Ave a tax-appeal candidate?
No — 400 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