21805 Koa Lane
Star, ID, 83669
$8,977,000
Listing Provided Courtesy of Amherst Madison at 208-391-2391A 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.
Current real estate data for Single Family in Star as of Jun 13, 2026
395
Single Family Listed
76
Avg DOM
298
Avg $ / SqFt
$762,178
Avg List Price
Property Details
Price:
$8,977,000
MLS #:
98988268
Status:
Active
Beds:
5
Baths:
7
Type:
Single Family
Subtype:
Single Family w/ Acreage
Listed Date:
May 29, 2026
Finished Sq Ft:
11,919
Total Sq Ft:
11,919
Lot Size:
745,747 sqft / 17.12 acres (approx)
Year Built:
2015
Schools
School District:
Middleton School District #134
Elementary School:
Mill Creek
Middle School:
Middleton Jr
High School:
Middleton
Interior
Above Grade Finished Area
11919
Appliances
Dishwasher, Disposal, Double Oven, Microwave, Oven/Range Built-In, Refrigerator, Water Softener Owned, Gas Range
Cooling
Central Air
Flooring
Hardwood
Heating
Forced Air, Passive Solar
Interior Features
Bath-Master, Bed-Master Main Level, Guest Room, Split Bedroom, Den/Office, Family Room, Great Room, Sauna/Steam Room, Rec/Bonus, Two Kitchens, Two Master Bedrooms, Walk-In Closet(s), Walk In Shower, Breakfast Bar, Pantry, Kitchen Island, Quartz Counters
Levels
Two
Main Level Bathrooms
6
Main Level Bedrooms
5
Exterior
Attached Garage YN
1
Construction Materials
Frame, Stone, Stucco
Covered Spaces
16
Garage Spaces
16
Lot Features
10 – 19.9 Acres, Dog Run, Garden, Irrigation Available, Views, Borders Public Owned Land, Chickens, Flood Plain, Wooded, Auto Sprinkler System, Drip Sprinkler System, Full Sprinkler System, Irrigation Sprinkler System
Open Parking YN
1
Parking Features
Attached, RV Access/Parking, Garage (Drive Through Doors), Finished Driveway
Parking Spots
16
Parking Total
16
Patio And Porch Features
Covered Patio/Deck
Roof
Architectural Style
Security Features
Alarm
Spa Features
Hot Tub/Spa, Bath
Waterfront Features
Waterfront, Lake, Pond, River
Financial
HOA Fee
$1,000
HOA Fee Frequency
Annually
Tax Year
2025
Taxes
$19,694
Map
Contact Us
Mortgage Calculator
Community
- Address21805 Koa Lane Star ID
- Subdivision0 Not Applicable
- CityStar
- CountyCanyon
- Zip Code83669
Subdivisions in Star
- 0 Not Applic.
- Aliso Creek
- Canvasback
- Celestial Villi
- Cherished Estates
- Collina Vista
- Craftsman Estates
- Cranefield
- Cresta Del Sol
- Crystal Springs Estates
- DicksonS Sub
- Endsley Court
- Fallbrook
- Greendale Grove
- Greendale Grove North
- Haven
- Havencrest
- Heirloom Ridge
- Heron River
- Hillsdale Estates
- Hope Springs
- Iron Mountain Estates
- Iron Mountain Vista
- Lake Pointe
- Langtree
- Leighton Lake Estates
- Middle Creek Star
- Milestone Ranch
- Monument Ridge
- Norterra
- Oaklawn
- Paint Point
- Parkstone
- Pinewood Lakes
- Pristine Meadows
- River Park Estates
- Rockbridge
- Roselands
- Rustic Ridge
- Saddlebrook
- Sage Canyon
- Schreiner Estates
- Sellwood
- Seneca Springs
- Shooting Comet
- Star Ridge Estates
- Star River Ranch
- Starcreek
- Stonecrest
- Sunfield Estates
- The Acres
- The Lakes at Pristine Meadows
- The Lakes at Pristine Springs
- Three Quarter Estates
- Torchlight Estates
- Trapper Ridge
- Trellis
- Trident Ridge
- Waterview Estates
- Yellowstone
Property Summary
- Located in the 0 Not Applicable subdivision, 21805 Koa Lane Star ID is a Single Family for sale in Star, ID, 83669. It is listed for $8,977,000 and features 5 beds, 7 baths, and has approximately 11,919 square feet of living space, and was originally constructed in 2015. The current price per square foot is $753. The average price per square foot for Single Family listings in Star is $298. The average listing price for Single Family in Star is $762,178. To schedule a showing of MLS#98988268 at 21805 Koa Lane in Star, ID, contact your Cardinal Realty of Idaho agent at 208-917-2570.
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Listing courtesy of Amherst Madison
Disclaimer: The data relating to real estate for sale on this web site comes in part from the IDX program of the Intermountain Multiple Listing Service. Real estate listings held by brokerage firms other than Cardinal Realty of Idaho are marked with the Intermountain Multiple Listing Service Logo. Detailed information for these types of listings shall include the name of the listing Brokerage. Information provided by IMLS is deemed reliable but not guaranteed. IDX information is provided exclusively for consumers personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IMLS does not assume any liability for missing or inaccurate data. Copyright 2026. Intermountain Multiple Listing Service, Inc. All rights reserved.21805 Koa Lane
Star, ID

