423 Marine St
Boulder, CO 80302
3 bd 4 ba 2,298 sqft Built 1909 Lot 7,282 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 | $70,006 | $70,800 | $140,806 | $13,425 |
| 2024 | $70,006 | $70,800 | $140,806 | $12,792 |
| 2023 | $76,641 | $72,608 | $149,249 | $12,570 |
| 2022 | $44,244 | $61,035 | $105,279 | $9,776 |
| 2021 | $45,517 | $62,791 | $108,308 | $9,322 |
| 2020 | $44,344 | $54,340 | $98,684 | $8,589 |
| 2019 | $44,344 | $54,340 | $98,684 | $8,458 |
| 2018 | $50,688 | $35,712 | $86,400 | $7,490 |
| 2017 | $26,309 | $35,712 | $62,021 | $5,208 |
| 2016 | $41,575 | $28,338 | $69,913 | $6,052 |
| 2015 | $41,575 | $28,338 | $69,913 | $5,730 |
| 2014 | $29,428 | $31,840 | $61,268 | $5,267 |
| 2013 | $29,428 | $31,840 | $61,268 | $5,151 |
| 2011 | $35,820 | $26,507 | $62,327 | $5,175 |
| 2010 | $35,820 | $26,507 | $62,327 | $4,921 |
| 2009 | $35,820 | $26,507 | $62,327 | $4,595 |
| 2008 | $26,490 | $33,830 | $60,320 | $4,436 |
Property facts
Year built
1909
Property type
single_family
Stories
2
Beds
3
Baths
4
Living area
2,298 sqft
Lot size
7,282 sqft
ZIP code
80302
City
Boulder
Street
Marine St
Coordinates
40.01197, -105.29098
Comparable properties nearby
Frequently asked questions
When did 423 Marine St last sell?
No public-record sale is on file for 423 Marine St.
What is the current tax assessment for 423 Marine St?
The most recent total assessment for 423 Marine St (year 2025) is $140,806 with $13,425 in property tax.
When was 423 Marine St built?
423 Marine St was built in 1909.
How does 423 Marine St compare to others on Marine St?
We track 8 other properties on Marine St. Browse the list under "Other properties on Marine St" to compare beds, baths, and sale history.
What are the property facts for 423 Marine St?
423 Marine St is a 3 bed, 4 bath, 2,298 sqft, 7,282 sqft lot single_family.
Is 423 Marine St a flip candidate?
No — 423 Marine St does not appear in our flips dataset.
Is 423 Marine St a tax-appeal candidate?
No — 423 Marine 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 Marine St