440 Japonica Way

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.

Listing Office: milehimodern - Boulder

Essential Information

MLS® #IR1031937
Price$12,000,000
Bedrooms3
Bathrooms5.00
Full Baths1
Half Baths1
Square Footage4,943
Acres0.29
Year Built2023
TypeResidential
Sub-TypeSingle Family Residence
StatusActive

Community Information

Address440 Japonica Way
SubdivisionNorthwest Boulder
CityBoulder
CountyBoulder
StateCO
Zip Code80304

Amenities

Parking Spaces2
ParkingOversized
# of Garages2
ViewMountain(s)
Has PoolYes
PoolPrivate

Utilities

Cable Available, Electricity Available, Natural Gas Available

Interior

HeatingHeat Pump, Hot Water
CoolingCentral Air
FireplaceYes
FireplacesLiving Room
StoriesTwo

Interior Features

Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s)

Appliances

Dishwasher, Double Oven, Refrigerator

Exterior

RoofComposition, Membrane

Lot Description

Cul-De-Sac, Level, Sprinklers In Front

Windows

Double Pane Windows, Window Coverings

School Information

DistrictBoulder Valley RE 2
ElementaryFoothill
MiddleCentennial
HighBoulder

Additional Information

Date ListedApril 23rd, 2025
ZoningRES

Listing Details

milehimodern - Boulder
Office Contact3038179300

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Listing information last updated on April 24th, 2025 at 11:18pm MDT.

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440 Japonica Way, Boulder, CO – $12,000,000

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