440 Japonica Way, Boulder, CO 80304 - Photo 1

1/1

$8,500,000

Sold
Closed
Single Family
5 Beds
1 Full Bath
4 Partial Baths
5,244 Sq. Ft.
2 Car Garage
Updated 2 hours ago

1/1

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.

Full Property Details

Full Property Details for 440 Japonica Way

General

Sold For: $8,500,000
Taxes: $29,325 (2025)
Status: Closed
Type: Single Family
Source: IRES
MLS ID: 1051957
Added to Site: 137 day(s) ago

Interior

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
Fireplace: Yes
Fireplace(s): Living Room
Appliances: Double Oven, Dishwasher, Refrigerator
Flooring: Wood

Rooms

Bathrooms

Total Bathrooms: 5
Full Bathrooms: 1
3/4 Bathrooms: 3
Half Bathrooms: 1
Main Floor Baths: 1

Bedrooms

Total Bedrooms: 5

Additional Information

Pool: Yes
Pool Description: Private

Exterior

Exterior Features: Sprinkler System, Oversized Garage
Porch/Patio/Deck: Patio

Parking

Garage: Yes
Attached garage: Yes
Garage Spaces: 2
Parking Features: Attached
Garage Description: Attached

Location

Area: Boulder
County: Boulder
Subdivision: Northwest Boulder

School Information

School District: Boulder Valley Dist RE2
Elementary School: Foothill
Middle School: Centennial
High School: Boulder

Heating & Cooling

Cooling Type: Central Air
Heating Type: Hot Water, Heat Pump, Zoned

Utilities

Gas: Yes
Sewer: Public Sewer
Water: City
Utility Description: Natural Gas Available, Electricity Available, Cable Available

Structural Information

Construction: Frame, Brick
Exterior Const.: Frame, Brick
Basement: Yes
Basement Desc.: Partially Finished
Roof: Composition, Rubber
Windows: Window Coverings
Square Feet: 5,244
Sq. Ft. Source: Assessor
Living Area: 4,943 Sq. Ft.
Year Built: 2023

Lot Features

Property View: Hills
Lot Size (Acres): 0.29
Lot Size (Sq. Ft.): 12,784
Frontage: City Street
Street/Road Desc.: Asphalt
Lot Features: Cul-De-Sac, Level, City Limits, Paved, Curbs, Sidewalks
Zoning: RES

Green Features

Energy Efficient: Southern Exposure, Windows, Photovoltaic Owned

Financial Considerations

Tax Amount: $29,325
Tax Year: 2025
Terms: Cash, Conventional

Disclosures and Reports

Special Conditions: Private Owner
Exclusions: Seller's personal property and/or staging items. Flat files in office.
Property ID: R0001873

Listed by milehimodern - Boulder (303) 876-1073
Sold by RE/MAX of Boulder, Inc (303) 817-9300

What's Your Home Worth?

* Indicates a required field

For a complimentary comparative market analysis, please contact us so we can discuss your home's value.

Your Property Information

Address optional

City *State *

Zip Code optional

Your Contact Information

First Name *Last Name *

Email Address *

Phone Number *

Comment *

Yes, I would like more information. Please use and/or share my information with a Coldwell Banker ® affiliated agent to contact me about my real estate needs. By clicking Submit, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If an Coldwell Banker affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE®, CENTURY 21®, Corcoran®, ERA®, or Sotheby’s International Realty®). I acknowledge that I have read and agree to the Terms of Use and Privacy Notice.

Listing agent

— 440 Japonica Way —

milehimodern - Boulder

303-876-1073

3038179300

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender

NMLS#: 1598647

Get Pre-Approved

Schools

Schools serving 440 Japonica Way

School District:Boulder Valley School District Re-2

Name	Grades	Distance
Foothill Elementary School 1001 Hawthorn Avenue, Boulder, CO 80304	K-5	0.4 mi
Centennial Middle School, Boulder, CO 2205 Norwood Avenue, Boulder, CO 80304	6-8	1.3 mi
Boulder High School 1604 Arapahoe Avenue, Boulder, CO 80302	9-12	1.8 mi

Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 440 Japonica Way

Date

Details

Price

Change

Source

7/02/2026

Sold

$8,500,000

-2.3%

MLS

3/18/2026

Price Reduced

$8,700,000

-8.42%

MLS

2/19/2026

Listed

$9,500,000

—

MLS

Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

745 Josephine Wy, Superior, CO 80027 - Photo 1

New to Website

$879,000

745 Josephine Wy Superior, CO 80027

Townhouse
Active
Updated 3 days ago

3
Beds
4
Total Baths
2,158
Sq. Ft.
MLS # 1063249

Listed by The Bernardi Group (303) 402-6000

146 Mesa Wy, Superior, CO 80027 - Photo 1

New to Website

$685,000

146 Mesa Wy Superior, CO 80027

Single Family
Active
Updated 20 hours ago

2
Beds
3
Total Baths
1,138
Sq. Ft.
MLS # 1063370

Listed by WK Real Estate

388 Fairfield Ln, Louisville, CO 80027 - Photo 1

New to Website

$930,000

388 Fairfield Ln Louisville, CO 80027

Single Family
Active
Updated 4 days ago

3
Beds
4
Total Baths
2,853
Sq. Ft.
MLS # 1063129

Listed by RE/MAX Elevate

1598 Ridgeview Dr, Louisville, CO 80027 - Photo 1

New to Website

$1,385,000

1598 Ridgeview Dr Louisville, CO 80027

Single Family
Active
Updated 4 days ago

5
Beds
4
Total Baths
3,690
Sq. Ft.
MLS # 1063166

Listed by WK Real Estate

2583 Trail Ln, Superior, CO 80027 - Photo 1

Price Reduced

-$10,000 (-1.08%)

$915,000

2583 Trail Ln Superior, CO 80027

Townhouse
Active
Updated 3 days ago

3
Beds
4
Total Baths
2,234
Sq. Ft.
MLS # 9048190

Listed by New Door Group (303) 859-6891

3722 Castle Peak Ave, Superior, CO 80027 - Photo 1

Price Reduced

-$13,000 (-1.58%)

$809,000

3722 Castle Peak Ave Superior, CO 80027

Single Family
Active
Updated 6 days ago

3
Beds
3
Total Baths
2,826
Sq. Ft.
MLS # 1061538

Listed by Staufer Team Real Estate

805 Promenade Dr, Superior, CO 80027 - Photo 1

Price Reduced

-$19,000 (-1.96%)

$950,000

805 Promenade Dr Superior, CO 80027

Townhouse
Active
Updated 5 days ago

3
Beds
4
Total Baths
3,000
Sq. Ft.
MLS # 4971748

Listed by Slifer Smith & Frampton - Summit County

1604 E Weldona Way, Superior, CO 80027 - Photo 1

Price Reduced

-$10,000 (-1.39%)

$709,000

1604 E Weldona Way Superior, CO 80027

Single Family
Active
Updated 5 days ago

4
Beds
3
Total Baths
2,656
Sq. Ft.
MLS # 1059820

Listed by 8z Real Estate

1590 Sumac Ave, Boulder, CO 80304 - Photo 1

Sold

$7,725,000

1590 Sumac Ave Boulder, CO 80304

Single Family
Closed

4
Beds
6
Total Baths
7,170
Sq. Ft.
MLS # 1061132

Listed by Live West Realty
Sold by Compass - Boulder

45 Bellevue Dr, Boulder, CO 80302 - Photo 1

Sold

$7,300,000

45 Bellevue Dr Boulder, CO 80302

Single Family
Closed

6
Beds
8
Total Baths
10,581
Sq. Ft.
MLS # 1036351

Listed and Sold by The Agency - Boulder

440 Japonica Way, Boulder, CO 80304 (MLS# 1051957) is a Single Family property that was sold at $8,500,000 on July 02, 2026. Want to learn more about 440 Japonica Way? Do you have questions about finding other Single Family real estate for sale in Boulder? You can browse all Boulder real estate or contact a Coldwell Banker agent to request more information.

440 Japonica Way Boulder, CO 80304