$7,700,000
 $41,335 est/mo Sourced by Back At You

21805 Koa Lane,Star, ID 83669

Star, ID 83669

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Description

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.

Details

MLS #98994369
Listing TypeFor Sale
StyleHouse
HOA Dues$1,000
Sub-TypeResale
StatusActive
Year2015
Days On Site40
Listing Provided ByAmherst Madison | Matt Bauscher

Features

Bed(s)5
Bath(s)7
SQ Feet11,919
Garage16
PoolYes
Story(s)2
Acreage17.12
Water FrontYes
Property ViewYes

Interior

CoolingCentral Air
Cooling Yes / NoYes
HeatingForced Air, Passive Solar
Heating Yes / NoYes
Interior FeaturesBath-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
AppliancesDishwasher, Disposal, Double Oven, Microwave, Oven/Range Built-In, Refrigerator, Water Softener Owned, Gas Range
Fireplace FeaturesThree or More, Gas
FlooringHardwood
Fireplace Yes / NoYes

Exterior

RoofArchitectural Style
Lot Features10 - 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
Construction MaterialsFrame, Stone, Stucco
Patio And Porch FeaturesCovered Patio/Deck
Security FeaturesAlarm

Parking

Parking FeaturesAttached, RV Access/Parking, Garage (Drive Through Doors), Finished Driveway
Garage Spaces16
Attached Garage Yes / NoYes

Utilities

SewerSeptic Tank

Taxes

Tax Year2025
Tax Annual Amount19693.58
Tax Legal Description13-4N-2W NE TX 22615 IN SENE & GOVT LT 1 & NESE

Area Information

StateID
CountyCanyon
CityStar
Zip Code83669
AreaCanyon
School DistrictMiddleton School District #134
Elementary SchoolMill Creek
High SchoolMiddleton
Listing VS Median (in 83669)
Price:
$7,700,000
low | high
Med:
$677,450
100% of Average
sqft:
11,919
low | high
Med:
2,346
100% of Average
$ / sqft:
$646
low | high
Med:
$294
100% of Average
On site:
40
low | high
Med:
64.5
62.015503875969% of Average
Sourced by Back At You

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Learn More About This Property

StateID
CountyCanyon
CityStar
Zip Code83669
AreaCanyon
School DistrictMiddleton School District #134
Elementary SchoolMill Creek
High SchoolMiddleton
Listing VS Median (in 83669)
Price:
$7,700,000
low | high
Med:
$677,450
100% of Average
sqft:
11,919
low | high
Med:
2,346
100% of Average
$ / sqft:
$646
low | high
Med:
$294
100% of Average
On site:
40
low | high
Med:
64.5
62.015503875969% of Average
Sourced by Back At You
Nearby Listings (Within 1/10 mile)
Price: $5.775M - $9.625M
sqft: 8,500 - 14,500
Nearby Listings Property ImageNearby Listings Details
21805 KOA Lane Property Photo 1
$8,977,000
21805 Koa Lane
Star, ID 83669
Listing Updated: August 18, 2026 at 11:31:40 AM PDT