Waterfront - Primary on Main
Address
21805 Koa Lane, Star, ID
Price
$ 7,700,000
Property Attributes
- MLS#98994369
- TypeSingle Family
- Listing Status Active
- CountyCanyon
- CityStar
- Neighborhood0 Not Applicable
- Zip83669
- Style
- Year Built2015
- Taxes$ 19693
- Price$ 7,700,000
- Bedrooms5
- Full Bathrooms7
- Half Bathrooms0
- Sqr Footage11919
- Lot Size17.12 Acres
Data Source:
Intermountain MLS (IMLS)
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.
| Elementary School | Middle School | High School |
|---|---|---|
| Mill Creek Elementary School | Middleton Jr Middle School | Middleton High School |
| Price History | |
|---|---|
| 7/17/2026 | Listed $7,700,000 |
General Features
| Sewer | Septic Tank |
|---|---|
| Heating | Forced Air |
| Cooling | Central Air |
| Roof | Architectural Style |
| Appliances | Dishwasher |
| HOA Fee | 1000 |
| Garage Spaces | 16 |
| Patio/Porch Features | Covered Patio/Deck |
| Pool Features | In Ground |
| Security Features | Alarm |
| Construction Materials | Frame |
| Year Built | 2015 |
| Levels | Two |
| Property Subtype | Single Family w/ Acreage |
| Tax Year | 2025 |
| Current Use | Single Family |
| Ownership | Fee Simple |
| Waterfront Features | Waterfront |
| Assoc Fee Paid Per | Annually |
| County | Canyon |
| Property Type | Residential |
| HOA | true |
| Attached Garage | true |
| Subdivision Name | 0 Not Applicable |
| Garage Y/N | true |
| Status | Active |
| Directions | 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. |
| ModificationTimestamp | 2026-07-20T06:00:46.200Z |
| High School | Middleton |
| City | Star |
| High School District | Middleton School District #134 |
| Lot Size Units | Acres |
| Lot Size Square Feet | 745747.2 |
| Carport Y/N | false |
| Spa Features | Hot Tub/Spa |
| Elementary School | Mill Creek |
| Land Lease Y/N | false |
| Tax Annual Amount | 19693.58 |
| Middle/Junior High School | Middleton Jr |
| Building Area Units | Square Feet |
| Primary Bedroom Level | Main |
| Living Area Units | Square Feet |
| Standard Status | Active |
| Middle/Junior School District | Middleton School District #134 |
| Elementary School District | Middleton School District #134 |
| Legal Description | 13-4N-2W NE TX 22615 IN SENE & GOVT LT 1 & NESE |
| LeasableAreaUnits | Square Feet |
| Freehold | IDX |
Interior Features
| Interior Amenities | Bath-Master |
|---|---|
| Flooring | Hardwood |
| Fireplace Features | Three or More |
| Kitchen Level | Main |
| Air Conditioning Y/N | true |
| Heating Y/N | true |
| Fireplace Y/N | true |
| Above Grade Finished Area | 11919 |
| Total Bedrooms | 5 |
| Living Room Level | Main |
| Main Level Bedrooms | 5 |
| Main Level Bathrooms | 6 |
| Below Grade Finished Area Unit Type | Square Feet |
| LivingAreaSource | Plans |
| Below Grade Finished Area Source | Plans |
| Above Grade Finished Area Source | Plans |
| Above Grade Finished Area Unit Type | Square Feet |
| Total Baths | 7 |
| Primary on Main | 195 |
| Second Bedroom Length | 13 |
| Second Bedroom Width | 15 |
| Bedroom 3 Area | 256 |
| Bedroom 3 Length | 16 |
| Bedroom 3 Width | 16 |
| Bedroom 4 Area | 256 |
| Bedroom 4 Length | 16 |
| Bedroom 4 Width | 16 |
| Family Room Area | 720 |
| Family Room Length | 24 |
| Living Room Area | 360 |
| Living Room Length | 18 |
| Living Room Width | 20 |
| Primary Bedroom Area | 368 |
| Primary Bedroom Length | 16 |
| Primary Bedroom Width | 23 |
| Family Room Width | 30 |
| Family Room Level | Main |
| Bedroom 5 Width | 16 |
| Bedroom 5 Level | Main |
| Bedroom 5 Length | 16 |
| Bedroom 5 Area | 256 |
| Bedroom 4 Level | Main |
| Bedroom 3 Level | Main |
| Second Bedroom Level | Main |
| Power Production Type | Photovoltaics |
Exterior Features
| Parking Features | Attached |
|---|---|
| Lot Features | 10 - 19.9 Acres |
| Water Source | Well |
| Total Parking | 16 |
| Lot Size Area | 17.12 |
| Spa | true |
| Building Area Total | 11919 |
| Lot Size Acres | 17.12 |
| Waterfront Y/N | true |
| Covered Spaces | 16 |
Amenities
- Foreclosure
- Views
- Short Sale
- New Construction
- Adult 55+
- Lease To Own
- No HOA Fees
- Furnished
- Primary On Main
- Air Conditioning
- Seller Finance
- Green
- Fixer Upper
- Horse
- Golf
- Fireplace
- Deck
- Garage
- Basement
- Pool
Property vs Single Family Average in 83669
Price
Taxes
Year Built
