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21805 Koa Lane, Star, ID 83669

Star
Local realty services provided by:CENTURY 21 Northstar
21805 Koa Lane,Star, ID 83669
$8,977,000
  • 5 Beds
  • 7 Baths
  • 11,919 sq. ft.
  • Single family
  • Active
Listed by: matt bauscher
Office: amherst madison
MLS#:98988268
Source:ID_IMLS

Price summary

  • Price:$8,977,000
  • Price per sq. ft.:$753.17
  • Monthly HOA dues:$83.33

About this home

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...

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Home facts

  • Year built:2015
  • Listing ID #:98988268
  • Added:1 day(s) ago
  • Updated:May 30, 2026 at 03:49 AM

Rooms and interior

  • Bedrooms:5
  • Total bathrooms:7
  • Full bathrooms:7
  • Flooring:Hardwood
  • Bathrooms Description:Bath-Master
  • Kitchen Description:Kitchen Island, Pantry, Sauna/Steam Room, Two Kitchens
  • Living area:11,919 sq. ft.

Heating and cooling

  • Cooling:Central Air
  • Heating:Forced Air, Passive Solar
  • Central air:Yes

Structure and exterior

  • Roof:Architectural Style
  • Year built:2015
  • Building area:11,919 sq. ft.
  • Lot area:17.12 Acres
  • Lot Features:Borders Public Owned Land, Chickens, Dog Run, Flood Plain, Irrigation Available
  • Construction Materials:Frame, Stone, Stucco

Schools

  • High school:Middleton
  • Middle school:Middleton Jr
  • Elementary school:Mill Creek

Utilities

  • Water:Well
  • Sewer:Septic Tank

Finances and disclosures

  • Price:$8,977,000
  • Price per sq. ft.:$753.17
  • Tax amount:$19,693 (2025)

Features and amenities

  • Amenities:Bath-Master, Breakfast Bar, Kitchen Island, Pantry, Sauna/Steam Room, Split Bedroom, Two Kitchens, Two Master Bedrooms, Walk-In Closet(s)
  • Pool features:In Ground, Pool, Private

Parking

  • Parking description:Attached, Finished Driveway, RV Access/Parking
  • Garage:Yes
  • Garage spaces:16
Property information provided by the RAFGC MLS – a service of the REALTOR® Association of Franklin & Gulf Counties.

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