• Buy
  • Rent
  • Sell
  • Agents
New DevelopmentWorld of Elliman
The latest in luxury property, lifestyle & culture, curated just for you.

Company

  • About Us
  • Leadership
  • Offices
  • Press & News
  • Elliman Cares
  • Join as an Agent
  • Careers
  • Elliman Global
  • Investors

Resources

  • World of Elliman
  • Elliman Insider
  • Magazines
  • Market Reports
  • Research Reports
  • Elliman Private Listings
  • New Elliman Exclusives
  • Featured Cities
  • Guides to Buying & Selling

Brand Portfolio

  • New Development
  • Commercial
  • Relocation
  • Sports & Entertainment
  • Farm & Ranch
  • Building Broker Specialists
  • Title Services
  • Estate, Trust & Probate

  • California
  • Colorado
  • Connecticut
  • Florida
  • Massachusetts
  • Mid-Atlantic
  • Nevada
  • New Jersey
  • New York
  • New York City
  • Texas
  • Vermont
  • Site Map
  • Terms
  • Privacy
  • Cookie Preferences
  • Do Not Sell or Share My Personal Information
  • NYS Housing Discrimination Disclosure Notice & Form
  • NYS Standard Operating Procedure
  • NYS Tenants' Rights to Reasonable Accommodations for persons with disabilities
  • California Consumer Privacy Act Notice
  • Texas Consumer Protection Notice
  • Texas Real Estate Commission Information About Brokerage Services
  • Text of NYC Human Rights Law
  • New York City Commission on Human Rights
  • NYC Source of Income Discrimination Information
  • NYC Source of Income Discrimination Tenant FAQs

THE SOURCE OF THE DISPLAYED DATA IS EITHER THE PROPERTY OWNER OR PUBLIC RECORD PROVIDED BY NON-GOVERNMENTAL THIRD PARTIES. IT IS BELIEVED TO BE RELIABLE BUT NOT GUARANTEED. FOR COLORADO VIEWERS, INFORMATION ABOUT NON-COMMERCIAL PROPERTIES IS PROVIDED EXCLUSIVELY FOR YOUR PERSONAL, NON-COMMERCIAL USE.

575 MADISON AVENUE, NEW YORK, NY 10022. 212.891.7000 © 2026 DOUGLAS ELLIMAN REAL ESTATE. EQUAL EMPLOYMENT OPPORTUNITY PROVIDER. ALL MATERIAL PRESENTED HEREIN IS INTENDED FOR INFORMATION PURPOSES ONLY. WHILE THIS INFORMATION IS BELIEVED TO BE CORRECT, IT IS REPRESENTED SUBJECT TO ERRORS, OMISSIONS, CHANGES, OR WITHDRAWAL WITHOUT NOTICE. ALL PROPERTY INFORMATION, INCLUDING, BUT NOT LIMITED TO SQUARE FOOTAGE, ROOM COUNT, NUMBER OF BEDROOMS, AND THE SCHOOL DISTRICT IN PROPERTY LISTINGS SHOULD BE VERIFIED BY YOUR OWN ATTORNEY, ARCHITECT, OR ZONING EXPERT. EQUAL HOUSING OPPORTUNITY. LISTING DATA REFRESHED ON MAR 14 2026 AT 8:12 PM.

DOUGLAS ELLIMAN IS A LICENSED REAL ESTATE BROKER IN CALIFORNIA WITH LICENSE # 01947727, COLORADO WITH LICENSE # EC100053892, CONNECTICUT WITH LICENSE # REB.0314827, THE DISTRICT OF COLUMBIA WITH LICENSE # REO40000160, FLORIDA WITH LICENSE # CQ1020232, MARYLAND WITH LICENSE # 645270, MASSACHUSETTS WITH LICENSE # 422764, NEVADA WITH LICENSE # 1454643, NEW JERSEY WITH LICENSE # 0572105, NEW YORK WITH LICENSE # 10991211812, TEXAS WITH LICENSE # 9008706, AND VIRGINIA WITH LICENSE # 0226035659.

SCAMMERS ARE IMPERSONATING REAL ESTATE AGENTS AND USING ACTIVE LISTINGS TO REQUEST FAKE DEPOSITS. SHOULD YOU HAVE A QUESTION ABOUT THE LEGITIMACY OF A DOUGLAS ELLIMAN AGENT OR LISTING, PLEASE CONTACT THE AGENT DIRECTLY VIA THE “AGENTS” LINK IN THE TOP MENU. DOUGLAS ELLIMAN WILL NEVER ASK FOR ANY PAYMENT TO RESERVE, HOLD, OR VIEW A PROPERTY. THESE CHARGES ARE PROHIBITED UNDER NEW YORK LAW. IF YOU RECEIVE A SUSPICIOUS REQUEST FOR MONEY, DO NOT SEND FUNDS. REPORT IT TO THE NYS DEPARTMENT OF STATE AND NOTIFY DOUGLAS ELLIMAN. YOU CAN READ THE NEW YORK STATE DEPARTMENT OF STATE'S CONSUMER ALERT HERE.

POWERED BY PURLIN.AI

440 Japonica Way

boulder, CO 80304

$9,500,000

  • 5 BR
    4 BA, 1 HALF BA
    approx. 4,943 SF

Interested? Let's Connect

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.

Details

4,943 Sq Ft

0.29 Private Acres Lot Size

single family home

$29,325 Annual Tax

Built in 2023

MLS/Listing ID 1051957

Amenities & Features

Lot - Curbs

Washer/Dryer Hookup

Southern Exposure

Main Level Bedroom

Main Floor Bath

Window Coverings

Hills View

Lot - Sidewalks

Composition

Rubber

Natural Wood

Heating - Zoned

Heating - Hot Water

Heating - Heat Pump

Windows

Walk-in Closets

Pantry

Open Floor Plan

Kitchen Island

High Ceilings

Eat-in Kitchen

Cathedral Ceilings

Beamed Ceilings

Lot - Paved

Lot - Level

Lot - Cul-de-sac

Parking - Attached

Patio

Pool - Private

Level Lot

Refrigerator

Double Oven

Dishwasher

Construction - Frame

Construction - Brick

Cooling - Central Air

Sprinkler Irrigation

Living Room Fireplace

Estimate my mortgage

TOTAL MONTHLY COST

$0

  • PRINCIPAL & INTEREST

    $0

  • PROPERTY TAXES

    $0

  • Common Charges

    $0

HOME PRICE
DOWN PAYMENT
TERM
INTEREST

Interested In 440 Japonica Way?