Exceptional Boulder value with mountain views and direct access to open space. This beautifully remodeled half-duplex offers a bright, open floor plan, stylish finishes and extensive updates throughout. The unfinished basement with bathroom rough-in provides excellent potential for future expansion. Enjoy a private, low-maintenance yard backing to the Boulder County trail system, covered two-car carport, low HOA, unincorporated Boulder County property taxes, and an easy 10-minute commute to central Boulder.
For sale
Price cut: $22K (11/1)
$475,000
4645 Portside Way, Boulder, CO 80301
2beds
1,536sqft
Duplex
Built in 1980
1,942 Square Feet Lot
$472,300 Zestimate®
$309/sqft
$123/mo HOA
What's special
- 211 days
- 1,048
- 44
Zillow last checked:
Listing updated:
Listed by:
Marina Jensen 303-908-9117,
Posh Realty
Source: REcolorado as distributed by MLS GRID,MLS#: 6750570
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 2
- Full bathrooms: 1
- 1/4 bathrooms: 1
- Main level bathrooms: 1
Bedroom
- Description: Generous Size With Deck Access
- Features: Primary Suite
- Level: Upper
Bedroom
- Description: Second Bedroom Upstairs, Features Mountain Views
- Level: Upper
Bathroom
- Description: Full Remodel
- Level: Main
Bathroom
- Description: Full Remodel
- Level: Upper
Dining room
- Description: Open To Kitchen, With Access To The Side Yard
- Level: Main
Kitchen
- Description: Full Remodel, Open To Dining Room
- Level: Main
Living room
- Description: Light Filled With All New Flooring
- Level: Main
Heating
- Forced Air
Cooling
- None
Appliances
- Included: Convection Oven, Dishwasher, Disposal, Microwave, Oven, Range, Refrigerator, Self Cleaning Oven
- Laundry: In Unit
Features
- Ceiling Fan(s), Eat-in Kitchen, Smart Thermostat, Smoke Free, Stone Counters
- Basement: Full,Unfinished
- Common walls with other units/homes: 1 Common Wall
Interior area
- Total structure area: 1,536
- Total interior livable area: 1,536 sqft
- Finished area above ground: 1,024
- Finished area below ground: 0
Property
Parking
- Total spaces: 2
- Parking features: Carport
- Carport spaces: 2
Features
- Levels: Two
- Stories: 2
- Patio & porch: Patio
- Exterior features: Balcony, Private Yard
- Fencing: Partial
- Has view: Yes
- View description: Mountain(s)
Lot
- Size: 1,942 Square Feet
- Features: Greenbelt, Open Space
Details
- Parcel number: R0083999
- Zoning: SR
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Contemporary
- Property subtype: Duplex
- Attached to another structure: Yes
Materials
- Frame, Wood Siding
- Foundation: Slab
- Roof: Composition
Condition
- Updated/Remodeled
- Year built: 1980
Utilities & green energy
- Sewer: Public Sewer
- Water: Public
Community & HOA
Community
- Security: Carbon Monoxide Detector(s), Smoke Detector(s)
- Subdivision: Portal Estates
HOA
- Has HOA: Yes
- Services included: Maintenance Grounds, Snow Removal, Trash
- HOA fee: $391 annually
- HOA name: Twin Lakes HOA
- HOA phone: 303-457-1444
- Second HOA fee: $90 monthly
- Second HOA name: Portal Estates
- Second HOA phone: 983-207-5231
Location
- Region: Boulder
Financial & listing details
- Price per square foot: $309/sqft
- Tax assessed value: $398,500
- Annual tax amount: $2,525
- Date on market: 4/13/2026
- Listing terms: 1031 Exchange,Cash,Conventional,FHA,VA Loan
- Exclusions: None
- Ownership: Corporation/Trust
Estimated market value
$472,300
$449,000 - $496,000
$2,961/mo
Price history
| Date | Event | Price |
|---|---|---|
| 11/1/2026 | Price change | $475,000-4.4%$309/sqft |
Source:  REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 10/23/2026 | Price change | $496,999-0.2%$324/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 9/29/2026 | Listed for sale | $497,999$324/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 8/24/2026 | Pending sale | $497,999$324/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 8/17/2026 | Price change | $497,999-0.2%$324/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 7/16/2026 | Price change | $498,999-0.2%$325/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 4/23/2026 | Price change | $499,999-2.9%$326/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 4/13/2026 | Listed for sale | $515,000+114.6%$335/sqft |
Source: REcolorado as distributed by MLS GRID #6750570 Report a problem | ||
| 1/10/2022 | Listing removed | -- |
Source: Zillow Rental Manager Report a problem | ||
| 1/3/2022 | Listed for rent | $1,375$1/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 12/3/2020 | Listing removed | $1,375$1/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 11/30/2020 | Listed for rent | $1,375$1/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 7/25/2020 | Listing removed | $1,375$1/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 7/23/2020 | Listed for rent | $1,375$1/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 7/2/2020 | Sold | $240,000$156/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $2,150 +1.7% | $24,906 -6.7% |
| 2024 | $2,115 -14.2% | $26,700 -12.4% |
| 2023 | $2,464 +4.8% | $30,463 +21.5% |
| 2022 | $2,350 +0.5% | $25,069 -2.8% |
| 2021 | $2,339 | $25,790 +1.6% |
| 2020 | $2,339 +13.8% | $25,390 |
| 2019 | $2,055 | $25,390 +13.4% |
| 2018 | $2,055 | $22,385 -9.5% |
| 2017 | $2,055 +31.2% | $24,748 +45.6% |
| 2016 | $1,566 +5.2% | $16,995 +8.2% |
| 2015 | $1,488 -2.2% | $15,705 |
| 2014 | $1,522 +6.7% | $15,705 |
| 2013 | $1,426 +1.1% | $15,705 -6% |
| 2012 | $1,411 +2.4% | $16,716 |
| 2011 | $1,377 +5.8% | -- |
| 2010 | $1,303 +6.5% | $16,520 |
| 2009 | $1,223 +2.5% | $16,520 -9.7% |
| 2008 | $1,193 +2% | $18,300 |
| 2007 | $1,170 +8.5% | $18,300 +4.5% |
| 2006 | $1,078 +10.3% | $17,520 |
| 2005 | $978 +0.5% | $17,520 +15.9% |
| 2004 | $973 -2.6% | $15,120 |
| 2003 | $999 +9% | $15,120 +11.7% |
| 2002 | $916 | $13,540 -90.9% |
| 2001 | -- | $148,000 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.Climate risks
Neighborhood: Gunbarrel
Nearby schools
Schools provided by the listing agent
- Elementary: Heatherwood
- Middle: Platt
- High: Boulder
- District: Boulder Valley RE 2
Source: REcolorado as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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