Date
Details
Price
Change
Source
5/15/2026
Listed
$7,950,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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Property Description
Set into the foothills at the base of Mount Sanitas, 3555 4th Street is a study in organic modernism, where limestone, steel, & expanses of glass blur the line between home & landscape. Designed by Fanas Architecture, the home is a work of architectural integrity, realized at the highest level of craft. A smooth limestone spine wall threads through the home, with rough-hewn limestone as a counterpoint. In the great room, exposed steel I-beams frame 24-foot retractable walls of glass, opening to north & south-facing patios. European white oak with radiant heat runs underfoot, beneath a floating wood-plank ceiling washed in cove lighting. The chef's kitchen by EKD features custom walnut cabinetry, a hand-laid mosaic backsplash, Dornbracht fixtures, & Gaggenau appliances. Built-ins flow through the butler's pantry, mudroom, & laundry. A main-floor flex suite serves as primary, office, or guest, complete with walk-out patio, walnut walk-in closet, & Japanese-inspired bath in Vola fixtures. The primary suite opens to the second-story deck through wall-to-wall sliding glass. Behold a coved wood plank ceiling, pin lights, and sculptural pendants. The primary bath is a masterful blend, anchored by a freestanding MTI resin tub, with a steam shower, bespoke cabinetry, alabaster sconces, & a custom walk-in closet. A loft with a wet bar adjoins two ensuite bedrooms. Over 3,200 square feet of finished exterior living space spans three levels, redefining outdoor living in Boulder. The south terrace pairs an overhang & electronic louvres with a fire pit & water features. Steel stairs rise to the upper deck, unveiling a hot tub, cantilevered overhang, and Sanitas to the west. Above, a rooftop deck opens to panoramic views. Lutron lighting on Control4, radiant heat across nine zones, full solar array, & two EV-charging rough-ins. Steps from the Goat trail and tucked into one of Boulder's most iconic neighborhoods, 3555 4th Street is a triumph of detail, intention, & place.
Full Property Details
Full Property Details for 3555 4th St
General
- Price: $7,950,000
- Taxes: $16,016 (2024)
- Status: Active
- Type: Single Family
- Source: IRES
- MLS ID: 1058738
- Updated: 5/15/2026
- Added to Site: 7 day(s) ago
Interior
- Interior Features: Eat-In Kitchen, Separate Dining Room, Open Floorplan, Pantry, Walk-In Closet(s), Wet Bar, Washer/Dryer Hookup, Kitchen Island, High Ceilings
- Fireplace: Yes
- Fireplace(s): Multi-Sided, Great Room
- Appliances: Disposal, Fire Alarm
- Flooring: Wood
Rooms
Bathrooms
- Total Bathrooms: 5
- Full Bathrooms: 4
- Half Bathrooms: 1
- Main Floor Baths: 1
Bedrooms
- Total Bedrooms: 4
Additional Information
- Security/Safety: Fire Sprinkler System, Fire Alarm
Exterior
- Exterior Features: Sprinkler System, Balcony, Heated Garage, Oversized Garage
- Porch/Patio/Deck: Patio, Deck
Parking
- Garage: Yes
- Attached garage: Yes
- Garage Spaces: 3
- Parking Features: Attached
- Garage Description: Attached
Location
- Area: Boulder
- County: Boulder
- Subdivision: Silver Lake Sub
School Information
- School District: Boulder Valley Dist RE2
- Elementary School: Foothill
- Middle School: Centennial
- High School: Boulder
Heating & Cooling
- Cooling Type: Central Air
- Heating Type: Forced Air, Zoned, Radiant, Humidity Control
Utilities
- Gas: Yes
- Gas: Xcel Energy
- Sewer: Public Sewer
- Water: City
- Utility Description: Natural Gas Available, Electricity Available, Cable Available, Satellite Available, High-Speed Internet Available
Structural Information
- Architectural Style: Contemporary
- Construction: Stone, Composition
- Exterior Const.: Stone, Composition
- Basement Desc.: None
- Roof: Rubber
- Windows: Window Coverings
- Square Feet: 4,218
- Sq. Ft. Source: Plans
- Living Area: 4,218 Sq. Ft.
- Year Built: 2021
Lot Features
- Property View: Hills
- Lot Size (Acres): 0.35
- Lot Size (Sq. Ft.): 15,445
- Frontage: City Street
- Street/Road Desc.: Asphalt
- Fence: Yes
- Lot Features: Wooded, Evergreen Trees, Deciduous Trees, Level, Rock Outcropping, House Faces South, City Limits, Paved
- Potential Use: Single-Family
- Zoning: SFR
- Fencing (Description): Fenced, Wood, Other
Green Features
- Energy Efficient: Windows, High Efficiency Furnace, Energy Rated, Photovoltaic Owned
Financial Considerations
- Tax Amount: $16,016
- Tax Year: 2024
- Terms: Cash, Conventional
Disclosures and Reports
- Special Conditions: Private Owner
- Exclusions: Staging items
- Property ID: R0033198
Listed by Compass - Boulder (303) 487-5472
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Listing agent
— 3555 4th St —
Compass - Boulder
303-487-5472
7204700910
NMLS#: 1598647Get Pre-Approved Today
Schools
Schools serving 3555 4th St
School District:Boulder Valley School District Re-2
| Name | Grades | Distance |
|---|---|---|
Foothill Elementary School 1001 Hawthorn Avenue, Boulder, CO 80304 | K-5 | 0.5 mi |
Centennial Middle School, Boulder, CO 2205 Norwood Avenue, Boulder, CO 80304 | 6-8 | 1.3 mi |
Boulder High School 1604 Arapahoe Avenue, Boulder, CO 80302 | 9-12 | 2 mi |
Disclaimer:
School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 3555 4th St
Tax History
Tax History for 3555 4th St
Year
Property Taxes
Change
Tax Assessment
Change
2025
100%
$1,402,704
98%
2024
100%
$706,809
—
2023
100%
$706,809
87%
2022
100%
$378,972
—
2021
-100%
$378,972
—
2019
$27,942
—
$378,972
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 3555 4th St
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Listed and Sold by The Agency - Boulder
3555 4th St, Boulder, CO 80304 (MLS# 1058738) is a Single Family property with 4 bedrooms, 4 full bathrooms and 1 partial bathroom. 3555 4th St is currently listed for $7,950,000 and was received on May 15, 2026. Want to learn more about 3555 4th St? Do you have questions about finding other Single Family real estate for sale in Boulder? You can browse all Boulder real estate or contact a Coldwell Banker agent to request more information.