21805 Koa Lane, Star, ID 83669 (MLS # 98988268)

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Listed with Amherst Madison

PRICE $8,977,000
BEDS 5
BATHS 7
HOME SIZE 11,919 sqft
LOT SIZE 17.12 ac
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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.

DAYS ON MARKET 26 LAST UPDATED 5/29/2026
TRACT 0 Not Applicable YEAR BUILT 2015
GARAGE SPACES 16.0 COUNTY Canyon
STATUS Active PROPERTY TYPE(S) Single Family

SCHOOLS
Elementary School Mill Creek
Jr. High School Middleton Jr
High School Middleton


ADDITIONAL DETAILS
AIR Central Air
AIR CONDITIONING Yes
APPLIANCES Dishwasher, Disposal, Double Oven, Gas Range, Microwave, Oven, Range, Refrigerator, Water Softener Owned
CONSTRUCTION Frame, Stone, Stucco
FIREPLACE Yes
GARAGE Yes
HEAT Forced Air, Passive Solar
HOA DUES 1000|Annually
INTERIOR Breakfast Bar, Kitchen Island, Pantry, Walk-In Closet(s)
LOT 17.12 acre(s)
LOT DESCRIPTION Garden, Views, Waterfront, Wooded
PARKING Attached, RV Access/Parking
POOL Yes
POOL DESCRIPTION In Ground, Private
SEWER Septic Tank
STORIES 2
SUBDIVISION 0 Not Applicable
TAXES 19693.58
VIEW Yes
WATER Well
WATERFRONT Yes
WATERFRONT DESCRIPTION Waterfront, Lake, Pond

SATELLITE VIEW



 
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Listings courtesy of Northwest MLS as distributed by MLS GRID. Based on information submitted to the MLS GRID as of 6/24/26 10:11 AM PDT. All data is obtained from various sources and may not have been verified by broker or MLS GRID. IDX information is provided exclusively for consumers’ personal noncommercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

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