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21805 Koa Lane, 
Star, ID 83669

$8,977,000


5

Beds


7

Baths


11,919

Sq Ft


Single Family

Active

Listed by

Matt Bauscher

Amherst Madison

208-391-2391

Last updated:

May 30, 2026, 03:49 AM

MLS#

98988268

Source:

ID IMLS

About This Home

21805 Koa Lane

A one-of-a-kind opportunity to own one of Idaho’s most iconic legacy estates. Privately positioned behind the gates of an exclusive waterfront enclave, this extraordinary 17.5-acre property offers over 1,200 feet of Boise River frontage, more than 2,400 feet of private lake frontage, and unmatched privacy bordered by protected state land. Encompassing nearly 12,000 sq ft with 6,000+ sq ft of covered outdoor living and 4,200+ sq ft of garage space, the residence was designed for year-round entertaining and resort-style living. Extensive renovations completed between 2024-2026 introduced designer finishes, custom stonework, and dramatic walls of glass with water views from every room. Amenities include a full indoor regulation basketball court with viewing lounge, professional-grade pickleball court, remodeled upstairs lounge and poker room with second kitchen and statement wine room, state-of-the-art theater with seating for 12, and a wellness retreat featuring a commercial-grade gym with $70k+ in Rogue equipment and sauna. Outdoor living is unparalleled with a heated pool and spa, waterfall-edge features, private lakes, sandy beachfront, new dock, outdoor kitchen with Wolf grill and Traeger smoker, fire features, pergola lounges, fountains, and curated entertaining spaces throughout. An extraordinary blend of luxury, recreation, privacy, and natural beauty.

Home Facts

Single Family

7 Baths

5 Bedrooms

Built in 2015

Price Summary

8,977,000

$753 per Sq. Ft.

MLS #:

98988268

Last Updated:

May 30, 2026, 03:49 AM

Added:

5 day(s) ago


Rooms & Interior

Bedrooms

Total Bedrooms:

5

Bathrooms

Total Bathrooms:

7

Full Bathrooms:

7

Interior

Living Area:

11,919 Sq. Ft.


Structure

Structure

Building Area:

11,919 Sq. Ft.

Year Built:

2015


Lot

Lot Size (Sq. Ft):

745,747


Finances & Disclosures

Finances

Price:

$8,977,000

Price per Sq. Ft:

$753 per Sq. Ft.

Source:ID IMLS
Property information provided by the RAFGC MLS – a service of the REALTOR® Association of Franklin & Gulf Counties.

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Contact an Agent

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 Contact, 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 a 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.