440 Japonica Way, Boulder, CO 80304

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440 Japonica Way,Boulder, CO 80304
$9,500,000
  • 5 Beds
  • 5 Baths
  • 5,244 sq. ft.
  • Single family
  • Active
Listed by: r tim goodacre3038179300
Office: milehimodern - boulder
MLS#:IR1051957
Source:ML

Price summary

  • Price:$9,500,000
  • Price per sq. ft.:$1,811.59

About this home

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

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Home facts

  • Year built:2023
  • Listing ID #:IR1051957

Rooms and interior

  • Bedrooms:5
  • Total bathrooms:5
  • Full bathrooms:1
  • Half bathrooms:1
  • Living area:5,244 sq. ft.

Heating and cooling

  • Cooling:Central Air
  • Heating:Heat Pump, Hot Water

Structure and exterior

  • Roof:Composition, Membrane
  • Year built:2023
  • Building area:5,244 sq. ft.
  • Lot area:0.29 Acres

Schools

  • High school:Boulder
  • Middle school:Centennial
  • Elementary school:Foothill

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$9,500,000
  • Price per sq. ft.:$1,811.59
  • Tax amount:$29,325 (2025)
MLS LogoBased on information submitted to the MLS GRID as of February 21, 2026 12:44 AM. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

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