$8,977,000

21805 Koa Ln Star, ID 83669

Estimated payment $50,211/month

Total Views 7,985
5 Beds
7 Baths
11,919 Sq Ft
$753 Price per Sq Ft

Highlights

  • Lake Front
  • In Ground Pool
  • RV Access or Parking
  • Second Kitchen
  • Sauna
  • Two Primary Bedrooms

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 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.

Listing Agent

Matt Bauscher

Amherst Madison Brokerage Phone: 208-391-2391 Listed on: 05/29/2026

Amherst Madison

Home Details

Home Type

  • Single Family

Est. Annual Taxes

  • $19,694

Year Built

  • Built in 2015

Lot Details

  • 17.12 Acre Lot
  • Lake Front
  • River Front
  • Dog Run
  • Drip System Landscaping
  • Sprinkler System
  • Wooded Lot
  • Garden

HOA Fees

  • $83 Monthly HOA Fees

Parking

  • 16 Car Attached Garage
  • Drive Through
  • Driveway
  • Open Parking
  • RV Access or Parking

Home Design

  • Frame Construction
  • Architectural Shingle Roof
  • Stucco
  • Stone

Interior Spaces

  • 11,919 Sq Ft Home
  • 2-Story Property
  • Multiple Fireplaces
  • Gas Fireplace
  • Great Room
  • Family Room
  • Den
  • Recreation Room
  • Sauna
  • Wood Flooring
  • Property Views

Kitchen

  • Second Kitchen
  • Breakfast Bar
  • Built-In Double Oven
  • Built-In Range
  • Microwave
  • Dishwasher
  • Kitchen Island
  • Quartz Countertops
  • Disposal

Bedrooms and Bathrooms

  • 5 Main Level Bedrooms
  • Primary Bedroom on Main
  • Double Master Bedroom
  • Split Bedroom Floorplan
  • En-Suite Primary Bedroom
  • Walk-In Closet
  • 7 Bathrooms
  • Spa Bath
  • Walk-in Shower

Pool

  • In Ground Pool
  • Spa

Outdoor Features

  • Lake, Pond or Stream
  • Covered Patio or Porch

Schools

  • Mill Creek Elementary School
  • Middleton Jr
  • Middleton High School

Utilities

  • Forced Air Heating and Cooling System
  • Well
  • Water Softener is Owned
  • Septic Tank

Additional Features

  • Heating system powered by passive solar
  • In Flood Plain
  • Chickens

Community Details

  • Property is near a preserve or public land

Listing and Financial Details

  • Assessor Parcel Number R34035010B0

Home Details

Home Type

Single Family

Est. Annual Taxes

$19,694

Year Built

Built in 2015

Lot Details

17.12 Acres

HOA Fees

$83 per month

Parking

16

Listing Details

  • Year Built: 2015
  • Kitchen Level: Main
  • Property Sub Type: Single Family w/ Acreage
  • Prop. Type: Residential
  • Lot Size Acres: 17.12
  • Ownership: Fee Simple
  • Subdivision Name: 0 Not Applicable
  • Above Grade Finished Sq Ft: 11919
  • Carport Y N: No
  • Garage Yn: Yes
  • Unit Levels: Two
  • Attribution Contact: Main: 208-391-2391
  • Special Features: VirtualTour

Interior Features

  • Heating: Forced Air, Passive Solar
  • Room Bedroom2 Level: Main
  • Room Bedroom5 Level: Main
  • Room Bedroom4 Level: Main
  • Living Room Living Room Level: Main
  • Room Family Room Level: Main
  • Master Bedroom Master Bedroom Level: Main
  • Room Bedroom5 Area: 256
  • Room Office Level: Main
  • Room Office Area: 168
  • Room Living Room Area: 360
  • Room Bedroom3 Level: Main
  • Master Bedroom Master Bedroom Width: 23
  • Room Master Bedroom Area: 368
  • Room Family Room Area: 720
  • Spa Features: Hot Tub/Spa, Bath
  • Private Spa: Yes
  • Appliances: Dishwasher, Disposal, Double Oven, Microwave, Oven/Range Built-In, Refrigerator, Water Softener Owned, Gas Range
  • Total Bedrooms: 5
  • Fireplace Features: Three or More, Gas
  • Fireplace: Yes
  • Flooring: Hardwood
  • Interior Amenities: 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
  • Living Area: 11919
  • Main Level Bathrooms: 6
  • Main Level Bedrooms: 5

Exterior Features

  • Roof: Architectural Style
  • Waterfront: Yes
  • Pool Features: In Ground, Pool, Private
  • Pool Private: Yes
  • Waterfront Features: Waterfront, Lake, Pond, River
  • Construction Type: Frame, Stone, Stucco
  • Patio And Porch Features: Covered Patio/Deck

Garage/Parking

  • Attached Garage: Yes
  • Covered Parking Spaces: 16
  • Garage Spaces: 16
  • Open Parking: Yes
  • Parking Features: Attached, RV Access/Parking, Garage (Drive Through Doors), Finished Driveway
  • Total Parking Spaces: 16

Utilities

  • Cooling: Central Air
  • Sewer: Septic Tank
  • Water Source: Well
  • Cooling Y N: Yes
  • Heating Yn: Yes

Condo/Co-op/Association

  • Association Fee: 1000
  • Association Fee Frequency: Annually
  • Association: Yes

Schools

  • Elementary School: Mill Creek
  • Junior High Dist: Middleton School District #134
  • High School: Middleton
  • Middle Or Junior School: Middleton Jr

Lot Info

  • 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
  • Parcel Number: R34035010B0
  • Current Use: Single Family
  • Land Lease: No
  • Lot Size Sq Ft: 745747.2

Tax Info

  • Tax Year: 2025
  • Tax Annual Amount: 19693.58

Multi Family

  • Above Grade Finished Area Units: Square Feet

Map

Range of Values:

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Home Values in the Area

Source: Public Records

Average Home Value in this Area





Source: Public Records

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $13,694 $4,800,510 $1,005,510 $3,795,000
2024 $20,965 $4,730,960 $613,960 $4,117,000
2023 $19,288 $4,002,860 $614,760 $3,388,100
2022 $15 $1,590 $1,590 $0
2021 $18 $1,380 $1,380 $0
2020 $19 $1,250 $1,250 $0
2019 $21 $1,260 $1,260 $0
2018 $23 $0 $0 $0
2017 $21 $0 $0 $0
2016 $20 $0 $0 $0
2015 $18 $0 $0 $0
2014 $16 $700 $700 $0
Source: Public Records

Property History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Event Price List to Sale Price per Sq Ft Prior Sale
05/29/2026 05/29/26 For Sale $8,977,000 +28.3% $753 / Sq Ft
04/10/2023 04/10/23 Sold -- -- -- View Prior Sale
02/21/2023 02/21/23 Pending -- -- --
10/21/2022 10/21/22 For Sale $6,995,000 -- $816 / Sq Ft
Source: Intermountain MLS

Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Type Sale Price Title Company
Quit Claim Deed -- Pioneer Title
Quit Claim Deed -- Pioneer Title
Quit Claim Deed -- Fidelity National Title
Interfamily Deed Transfer -- None Available
Quit Claim Deed -- Title One Title
Warranty Deed -- Titleone Boise
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Loan Amount Loan Type
Open $1,450,000 New Conventional
Previous Owner $1,112,000 Adjustable Rate Mortgage/ARM
Source: Public Records

Source: Intermountain MLS

MLS Number: 98988268

Intermountain MLS

APN: 34035010B0

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