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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.

Overview

Property Status
Sold
Date Sold
July 2, 2026
Lot Size
0.29 Acres
MLS ID
1051957
Property Type
Residential
Year Built
2023

Features & Amenities

Neighborhood
South Boulder
View Description
Hills
Stories
2
Garage Spaces
2.0
Water Source
City
Utilities
Natural Gas Available, Electricity Available, Cable Available
Pool
Private
Roof
Composition, Rubber
Lot Features
Cul-De-Sac, Level, City Limits, Paved, Curbs, Sidewalks
Parking
Attached
Heat Type
Hot Water, Heat Pump, Zoned
Air Conditioning
Central Air
Fireplace
Living Room
Appliances
Double Oven, Dishwasher, Refrigerator
Other Interior Features
Eat-in Kitchen, Cathedral Ceiling(s), Open Floorplan, Pantry, Wood Windows, Walk-In Closet(s), Washer/Dryer Hookup, Kitchen Island, High Ceilings, Beamed Ceilings
Sewer
Public Sewer
Disability Features
Level Lot, Main Floor Bath, Main Level Bedroom
Other Exterior Features
Sprinkler System, Oversized Garage
Elementary School
Foothill
Middle School
Centennial
High School
Boulder
School District
Boulder Valley Dist RE2
Sales Price
$8,500,000
Real Estate Tax
$29,325/yr
Zoning
RES

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440 Japonica Way

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440 Japonica Way
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