505 Marine St
Boulder, CO 80302
5 bd 4 ba 4,521 sqft Built 1902 Lot 10,454 sqft single_family
Most recent sale
$3,600,000
Oct 5, 2022
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Oct 5, 2022 | Sold | $3,600,000 | Public Record |
| Oct 3, 2022 | Sold | $3,600,000 | MLS #967937 |
| Aug 5, 2022 | Price changed | $3,950,000 | MLS #967937 |
| Jul 15, 2022 | Price changed | $4,250,000 | MLS #967937 |
| Jun 9, 2022 | Listed | $4,495,000 | MLS #967937 |
| Apr 24, 1990 | Sold | $265,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $119,912 | $95,713 | $215,625 | $20,721 |
| 2024 | $119,912 | $95,713 | $215,625 | $19,447 |
| 2023 | $126,758 | $96,420 | $223,178 | $18,955 |
| 2022 | $104,563 | $72,906 | $177,469 | $16,480 |
| 2021 | $107,572 | $75,004 | $182,576 | $15,790 |
| 2020 | $85,314 | $74,146 | $159,460 | $13,880 |
| 2019 | $85,314 | $74,146 | $159,460 | $13,668 |
| 2018 | $82,411 | $54,936 | $137,347 | $11,908 |
| 2017 | $82,411 | $54,936 | $137,347 | $11,535 |
| 2016 | $75,604 | $50,387 | $125,991 | $10,906 |
| 2015 | $75,604 | $50,387 | $125,991 | $10,328 |
| 2014 | $47,195 | $56,436 | $103,631 | $8,910 |
| 2013 | $47,195 | $56,436 | $103,631 | $8,713 |
| 2012 | $65,034 | $31,362 | $96,396 | $8,075 |
| 2011 | $65,034 | $31,362 | $96,396 | $8,004 |
| 2010 | $65,033 | $31,362 | $96,395 | $8,573 |
| 2009 | $65,033 | $31,362 | $96,395 | $8,005 |
| 2008 | $55,080 | $35,820 | $90,900 | $6,686 |
Property facts
Year built
1902
Property type
single_family
Stories
2
Beds
5
Baths
4
Living area
4,521 sqft
Lot size
10,454 sqft
ZIP code
80302
City
Boulder
Street
Marine St
Coordinates
40.01204, -105.28904
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
$21,600
Gross rental yield
7.20%
Implied cap rate
4.68%
Trend-extrapolated value
—
Frequently asked questions
When did 505 Marine St last sell?
505 Marine St most recently sold on Oct 5, 2022 for $3,600,000.
What is the current tax assessment for 505 Marine St?
The most recent total assessment for 505 Marine St (year 2025) is $215,625 with $20,721 in property tax.
How does 505 Marine St's assessment compare to its last sale price?
The current assessment is 94.0% below the last sale price of $3,600,000.
When was 505 Marine St built?
505 Marine St was built in 1902.
How does 505 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 505 Marine St?
505 Marine St is a 5 bed, 4 bath, 4,521 sqft, 10,454 sqft lot single_family.
Is 505 Marine St a flip candidate?
No — 505 Marine St does not appear in our flips dataset.
Is 505 Marine St a tax-appeal candidate?
No — 505 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