21805 Koa Lane, Star, ID 83669
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21805 Koa Lane, Star, ID 83669
21805 Koa Lane, Star, ID 83669
21805 Koa Lane, Star, ID 83669
21805 Koa Lane, Star, ID 83669
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Matt Putman

Matt Putman

+1(208) 358-9059
Listed by Matt Bauscher • Amherst Madison
$ 8,977,000
Est. payment /mo
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21805 Koa Lane Star, ID 83669

5 Beds

7 Baths

11,919 SqFt

UPDATED:

Key Details

Property Type Single Family Home

Sub Type Single Family w/ Acreage

Listing Status Active

Purchase Type For Sale

Square Footage 11,919 sqft

Price per Sqft $753

Subdivision 0 Not Applicable

MLS Listing ID 98988268

Bedrooms 5

HOA Fees $1,000/ann

HOA Y/N Yes

Abv Grd Liv Area 11,919

Year Built 2015

Annual Tax Amount $19,693

Tax Year 2025

Lot Size 17.120 Acres

Acres 17.12

Property Sub-Type Single Family w/ Acreage

Source IMLS 2

Property 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.

Location

State ID

County Canyon

Area Star - 0950

Direction Use Google Maps to get to the location address. From Downtown Star, Continue West on Highway 44, S on Bent Ln, SE on Castagnola Ln, Then S on Chateau Ct.

Rooms

Family Room Main

Primary Bedroom Level Main

Master Bedroom Main

Main Level Bedrooms 5

Bedroom 2 Main

Bedroom 3 Main

Bedroom 4 Main

Living Room Main

Kitchen Main Main

Family Room Main

Interior

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

Heating Forced Air, Passive Solar

Cooling Central Air

Flooring Hardwood

Fireplaces Type Three or More, Gas

Fireplace Yes

Appliance Dishwasher, Disposal, Double Oven, Microwave, Oven/Range Built-In, Refrigerator, Water Softener Owned, Gas Range

Exterior

Garage Spaces 16.0

Pool In Ground, Pool, Private

Community Features Single Family

Waterfront Description Waterfront,Lake,Pond,River

Roof Type Architectural Style

Porch Covered Patio/Deck

Attached Garage true

Total Parking Spaces 16

Private Pool true

Building

Lot Description 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

Faces Use Google Maps to get to the location address. From Downtown Star, Continue West on Highway 44, S on Bent Ln, SE on Castagnola Ln, Then S on Chateau Ct.

Sewer Septic Tank

Water Well

Level or Stories Two

Structure Type Frame,Stone,Stucco

New Construction No

Schools

Elementary Schools Mill Creek

High Schools Middleton

School District Middleton School District #134

Others

Senior Community Yes

Tax ID R34035010B0

Ownership Fee Simple

Intermountain MLS (IMLS)
© 2026 Intermountain Multiple Listing Service, Inc. All rights reserved.
Matt Putman

Matt Putman

Agent | License ID: 8171947

+1(208) 358-9059

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21805 Koa Lane