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5 Beds
5 Baths
4,943 sqft

$8,500,000

440 Japonica Way, Boulder CO, 80304

Price per sqft$1,719.60
Built in2023
Property size4,943 sqft
Property typeResidential
Courtesy of milehimodern - Boulder, R Tim Goodacre Listing Contact: 3038179300

Overview

Sold

Listed Feb 19, 2026

Updated Jul 7

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.

Additional information

MLS® ID
1051957

Interior Features

Bedrooms
5
Bathrooms
5
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
Yes

Exterior Features

Lot Size
0.29 Acres

Other Property Details

Taxes
$29,325
Tax Frequency
Annually
Garage
Yes
View
Yes
Pool
Yes

Also listed on REColorado

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