About 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. Easy upstairs conversion for 3 beds up. Already designed.
Features of 440 Japonica Way
| MLS® # | IR1031937 |
|---|---|
| Price | $9,950,000 |
| Bedrooms | 4 |
| Bathrooms | 5.00 |
| Full Baths | 1 |
| Half Baths | 1 |
| Square Footage | 4,943 |
| Acres | 0.29 |
| Year Built | 2023 |
| Type | Residential |
| Sub-Type | Single Family Residence |
| Status | Active |
Community Information
| Address | 440 Japonica Way |
|---|---|
| Subdivision | Northwest Boulder |
| City | Boulder |
| County | Boulder |
| State | CO |
| Zip Code | 80304 |
Amenities
| Utilities | Cable Available, Electricity Available, Natural Gas Available |
|---|---|
| Parking Spaces | 2 |
| Parking | Oversized |
| # of Garages | 2 |
| View | Mountain(s) |
| Is Waterfront | No |
| Has Pool | Yes |
| Pool | Private |
Interior
| 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 |
| Heating | Heat Pump, Hot Water |
| Cooling | Central Air |
| Fireplace | Yes |
| Fireplaces | Living Room |
| Stories | Two |
Exterior
| Lot Description | Cul-De-Sac, Level, Sprinklers In Front |
|---|---|
| Windows | Double Pane Windows, Window Coverings |
| Roof | Composition, Membrane |
School Information
| District | Boulder Valley RE 2 |
|---|---|
| Elementary | Foothill |
| Middle | Centennial |
| High | Boulder |
Additional Information
| Date Listed | April 23rd, 2025 |
|---|---|
| Zoning | RES |
| Foreclosure | No |
| Short Sale | No |
| RE / Bank Owned | No |
Listing Details
| Office | milehimodern - Boulder |
|---|