440 Japonica Way, Boulder, CO 80304
- $8,500,000
- 5
- BD
- 5
- BA
- 4,943
- SqFt
- Sold Price
- $8,500,000
- List Price
- $8,700,000
- Closing Date
- Jul 02, 2026
- Type
- Single Family Residential
- Property Sub Type
- Single Family Residence
- Status
- CLOSED
- MLS Number
- IR1051957
- Bedrooms
- 5
- Bathrooms
- 5
- Baths Half
- 1
- Sqft Total
- 4,943
- Neighborhood
- Northwest Boulder
- Year Built
- 2023
Property Description
A striking blend of sustainability and sophistication; this home, designed by Annette and Dennis Martin in 2023, is tucked on a quiet cul-de-sac off one of Boulder's most coveted streets. This net-zero residence features advanced energy systems, including geothermal heating/cooling, radiant in-floor heat, a high-efficiency gas boiler and a 14.44kW solar array. A thoughtful layout connects open-concept living with vaulted ceilings, custom floating staircase, extensive millwork and designer lighting from Italy, Denmark, England, and the U.S. The main-floor primary suite offers a spa-like bath with onyx and white marble tile, double vanities, and a Kohler whirlpool tub. Entertain indoors or out with a chef's kitchen featuring Gaggenau and Sub-Zero appliances, a built-in Sedona grill, and a 10'x38' year-round saltwater pool. Expansive Sierra Pacific windows and doors frame views of the foothills while blending interior and exterior spaces. Savant smart home tech and Lutron lighting ensure effortless living at every turn. Easy upstairs conversion for 3 beds up. Already designed.
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Additional Information
- View
- Mountain(s)
- Lot Size Acres
- 0.29
- Lot Size Sq Ft
- 12,784
- Tax Amount
- $29,325
- Tax Year
- 2025
- Sewer
- Public Sewer
- Flooring
- Wood
- Heating
- Heat Pump, Hot Water
- Cooling
- Central Air
- Fireplace Features
- Living Room
- School District
- Boulder Valley RE 2
- Elementary School
- Foothill
- Middle Or Junior School
- Centennial
- High School
- Boulder
- Parking Total Searchable
- 2
- Parking Features
- Oversized
Mortgage Calculator
Courtesy of milehimodern - Boulder . 3038179300
Selling Office: RE/MAX of Boulder, Inc.