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440 Japonica Way

Boulder, CO 80304
  • $9,950,000
  • STATUS: Active
  • ON SITE: 230 Days
  • MLS #: 1031937
UPDATED: 68 min ago
$9,950,000
  • 4
    BEDS
  • 0.29
    ACRES
  • 4
    BATHS
  • 1
    1/2 BATHS
  • 4,943
    SQFT
  • $2,013
    $/SQFT
Neighborhood:
Type:
Single-Family Home
Built:
2023
County:
Area:

School Information

Elementary School:
Middle School:
High School:
School District:

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.

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© 2025 Information and Real Estate Services, LLC. IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but is not guaranteed accurate by the MLS or Tandem Real Estate. Data last updated: 2025-12-10T20:43:36.92.

Information source: Information and Real Estate Services, LLC. Provided for limited non-commercial use only under IRES Rules © Copyright IRES.
www.tandemrealestateco.com/homes/162893586
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440 Japonica Way Boulder, CO 80304

  • Price: $9,950,000
  • Status: Active
  • On Site: 230 Days
  • Updated: 68 min ago
  • MLS #: 1031937
4
Beds
4
Baths
1
½ Baths
0.29
Acres
4,943
SQFT
$2,013
$/SQFT
2023
Built
Neighborhood:
Northwest Boulder
County:
Boulder
Area:
Boulder
Elementary School:
Foothill
Middle School:
Centennial
High School:
Boulder
School District:
Boulder Valley Dist Re2
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.
Exterior Features

Construction Materials FrameBrick Exterior Features Sprinkler SystemOversized Garage Garage Type Attached Patio And Porch Features Patio Pool Features Private Roof CompositionRubber View Hills Waterfront YN No Window Features Window Coverings

Interior Features

Above Grade Finished Area 3512 Accessibility Features Level LotMain Floor BathMain Level Bedroom All Bedrooms Conform Yes Appliances Double OvenDishwasherRefrigerator Basement Partially Finished Bathrooms Total Integer 5 Baths Full Additional 0 Baths Full Basement 0 Baths Full Lower 0 Baths Full Main 1 Baths Full Upper 0 Baths Half Additional 0 Baths Half Basement 0 Baths Half Lower 0 Baths Half Main 1 Baths Half Upper 0 Baths Rough In 0 Baths Three Quarters Additional 0 Baths Three Quarters Basement 1 Baths Three Quarters Lower 0 Baths Three Quarters Main 0 Baths Three Quarters Upper 2 Below Grade Finished Area 1732 Cooling Central Air Fireplace Features Living Room Flooring Wood Has Family Room No Has Study Yes Heating Hot WaterHeat PumpZoned Interior Features Eat-in KitchenCathedral Ceiling(s)Open FloorplanPantryWood WindowsWalk-In Closet(s)Washer/Dryer HookupKitchen IslandHigh CeilingsBeamed Ceilings Levels Two Living Area Source Assessor Main Floor Sq Ft 2302 Upper Sq Ft 1210

Property Features

Are Ditches Active No Association YN No Exclusions Seller's personal property and/or staging items. Flat files in office. Flood Plain Minimal Flood or C Rating Green Energy Efficient Southern ExposureWindowsPhotovoltaic Owned Has Improvements No Has Irrigation Ditches No Has Metro Tax District No Has Water Rights No Irrigation Water Rights YN No Is Water Meter Installed Yes Listing Terms CashConventional Lot Features Cul-De-SacLevelCity LimitsPavedCurbsSidewalks New Construction Status Not NewPreviously Owned New Construction YN No Power Production Type 1 Property Sub Type Single Family Residence Road Frontage Type City Street Road Surface Type Asphalt Sewer Public Sewer Solar Pv Kilowatts 14.44 Solar Pv Year Installed 2023 Special Listing Conditions Private Owner Tax Annual Amount 29529 Tax Year 2024 Utilities Natural Gas AvailableElectricity AvailableCable Available Water Source City Zoning RES

Listing information © 2025 Information and Real Estate Services
Listing provided courtesy of R Tim Goodacre of milehimodern - Boulder: 3038179300.



© 2025 Information and Real Estate Services, LLC. IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but is not guaranteed accurate by the MLS or Tandem Real Estate. Data last updated: 2025-12-10T20:43:36.92.

Information source: Information and Real Estate Services, LLC. Provided for limited non-commercial use only under IRES Rules © Copyright IRES.
 
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