3555 4th Street
Boulder, CO, 80304 $ 7,950,000
Bedrooms4 Baths4.1 Sq 4,218 Monthly Estimate*
$ 48,950
Listed by Compass - Boulder
for $7,950,000 with 4 bedrooms and 4 full baths, 1 half bath. This 4,218 square foot home was built in 2021 on a lot size of 0.35.
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.
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FeaturesInteriorInterior Amenities Eat-in Kitchen Five Piece Bath Kitchen Island Open Floorplan Pantry Walk-In Closet(s) Wet Bar
Basement None
Flooring Tile Wood
Fireplace Features Great Room Other
Basement (Y/N) N
Window Features Triple Pane Windows Window Coverings
Above Grade Finished Area 4218
Half Baths 1
3/4 Baths 0
Laundry Features In Unit
Total Bedrooms 4
Below Grade Finished Area 0
Main Level Bedrooms 1
Main Level Bathrooms 2
Total Baths 5
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GeneralSewer Public Sewer
Heating Forced Air Radiant
Cooling Central Air
Utilities Cable Available Electricity Available Internet Access (Wired) Natural Gas Available
Possession Closing/DOD
Roof Membrane
Appliances Disposal Humidifier
Zoning SFR
Garage Spaces 3
Patio/Porch Features Deck Patio
Architectural Style Contemporary
Security Features Fire Alarm Fire Sprinkler System Smoke Detector(s)
Construction Materials Stone
Exclusions Staging items
Year Built 2021
View Mountain(s)
Levels Two
Property Subtype Single Family Residence
Tax Year 2024
Ownership Individual
County Boulder
Property Type Residential
HOA N
Attached Garage Y
Subdivision Name Silver Lake Sub
Facing Direction South
Possible Use Residential
Full Baths 4
Status Active
High School Boulder
City Boulder
High School District Boulder Valley RE 2
Lot Size Square Feet 15445
Listing Terms Cash Conventional
Elementary School Foothill
Tax Annual Amount 16016
Middle/Junior High School Centennial
Concessions No
Structure Type House
Standard Status Active
Occupancy Type Owner
Elementary School District Boulder Valley RE 2
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ExteriorExterior Amenities Balcony
Vegetation Wooded
Fencing Fenced
Parking Features Heated Garage Oversized
Lot Features Level Rock Outcropping Sprinklers In Front
Water Source Public
Total Parking 3
Building Area Total 4218
Lot Size Acres 0.35
Road Surface Type Paved
Road Frontage Type Public
Other Equipment Satellite Dish
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* Excluded FeaturesAffordability Calculator
- Monthly Principal & Interest
- $48,950
- Monthly Property Taxes
- $1,335
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
Learn more about how to save NearbySingle family listings in Boulder, CO
Average List Price $2,496,977
Percent of Sale Price 69%
About Boulder, CO 102,151 Population
6% Since 2002
$ 65,436 Median Income
31.88 Median Age
18% Households with Children
Trends Information provided by ATTOM Data Solutions.
1955676 Elementary School
1955871 Middle School
Boulder High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 5/11/2026 | $7,950,000 | | Listed Price |