Date
Details
Price
Change
Source
7/01/2026
Listed
$6,500,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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1/23
$6,500,000
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1/23
Property Description
Situated within The Island, one of Austin's most coveted gated communities on Lake Austin, this exceptional waterfront estate offers a rare combination of privacy, acreage, and direct lake access. Set on 1.6 acres along a serene canal, the property includes a spacious main residence and a separate one-bedroom guest house, creating an ideal setting for both everyday living and hosting family and friends. Designed for effortless entertaining, the main home features an open floor plan that connects expansive living spaces with the outdoors. Large windows frame peaceful water views, while the covered patio with a fireplace provides a year-round gathering space overlooking the property's lush surroundings. Five bedrooms, four full bathrooms, and two half bathrooms offer flexibility and comfort across the thoughtfully designed residence. Outdoor amenities elevate the Lake Austin lifestyle, with a private dock featuring two boat slips for easy access to boating, paddleboarding, and waterfront recreation. Combining the security and prestige of The Island with generous acreage, guest accommodations, and coveted waterfront access, this property presents a rare opportunity to experience one of Austin's most desirable lakefront settings. Tax and assessed values are estimates for illustration purposes only. All figures should be independently verified.
Full Property Details
Full Property Details for 4400 Island Ave
General
- Price: $6,500,000
- HOA FEE: $250/month
- HOA FEE FREQ.: Annually
- Taxes: $114,303 (2026)
- Status: Active
- Type: Single Family
- Source: Austin_MLS
- MLS ID: 9276221
- Updated: 8/14/2026
- Added to Site: 56 day(s) ago
Interior
- Interior Features: Wet Bar, Breakfast Bar, Bookcases, Built-in Features, Crown Molding, Separate/Formal Dining Room, Double Vanity, Entrance Foyer, French Door(s)/Atrium Door(s), High Ceilings, Interior Steps, Kitchen Island, Multiple Living Areas, Multiple Dining Areas, Main Level Primary, Pantry, Stone Counters, Soaking Tub, Study, Walk-In Closet(s)
- Fireplace: Yes
- Number of Fireplaces: 2
- Fireplace(s): Living Room, Outside
- Appliances: Built-In Oven, Double Oven, Dishwasher, Gas Cooktop, Disposal, Refrigerator, Stainless Steel Appliance(s)
- Flooring: Stone
Rooms
Bathrooms
- Total Bathrooms: 6
- Full Bathrooms: 4
- Half Bathrooms: 2
Bedrooms
- Total Bedrooms: 5
- Bedrooms Main: 1
Other Rooms
- Laundry: Main Level, Laundry Room
Additional Information
- Shared Amenities: Gated
- Spa Description: None
- Security/Safety: Smoke Detector(s)
Exterior
- Exterior Features: Boat Lift, Balcony, Boat Slip, Dock, Private Yard
- Porch/Patio/Deck: Covered, Patio, Balcony
Parking
- Garage: Yes
- Garage Spaces: 3
- Covered Spaces: 3
- Total Spaces: 6
- Parking Features: Attached, Garage
Location
- Area: 1B
- County: Travis
- Subdivision: Island At Mount Bonnell Shores
- Driving Directions: Balcones to Mt Bonnell to Island at Mount Bonnell neighborhood gate. Home is on Island Avenue near the exit gate.
- Direction Faces: East
School Information
- Elem School District: Austin ISD
- Midd School District: Austin ISD
- High School District: Austin ISD
- Elementary School: Highland Park
- Middle School: Lamar (Austin ISD)
- High School: McCallum
Community
- Gated community: Yes
- Association: Yes
- Assoc. Name: Island at Mt. Bonnell
- Assoc. Fees Include: Common Area Maintenance
Heating & Cooling
- Central air: Yes
- Air Conditioning: Yes
- Cooling Type: Central Air
- Heating Type: Central, Natural Gas
Utilities
- Sewer: Public Sewer
- Water: Public
- Utility Description: Electricity Available, Natural Gas Available, Underground Utilities
Structural Information
- Detached/Attached: Detached
- Construction: Masonry
- Roof: Tile
- Windows: Window Treatments
- Stories/Levels: 2
- Square Feet: 7,219
- Sq. Ft. Source: Public Records
- Living Area: 7,219 Sq. Ft.
- Year Built: 1996
- Year Built Source: Public Records
- Property Condition: Resale
Additional Structures
- Other Structures: Guest House, None, See Remarks
Lot Features
- Property View: Hills, Lake, River
- Lot Size (Acres): 1.601
- Lot Size (Sq. Ft.): 69,739.56
- Lot Features: Trees Large Size, Waterfall
- Fencing (Description): None
Water Features
- Water Front: Yes
- Water View: Yes
- Water Front Name: Lake Austin
- Water Front Desc.: Canal Front, Lake Front, Boat Ramp/Lift Access
- Lake Front: Yes
Financial Considerations
- Association Fee: $3,000
- Assoc Fee Freq.: Annually
- Assessment Amount: $5,585,378
- Tax Amount: $114,303.92
- Tax Year: 2026
- Terms: Cash, Conventional
Disclosures and Reports
- Special Conditions: Standard
- Documents Avail.: Survey
- Legal Description: LOT 1-A BLK B ISLAND AT MT BONNELL SHORES THE AMENDED PLAT OF LOTS 1&2
- Disclosures/Reports: None
- Property ID: 1290705100000
- Block: B
- Lot Number: 1-A
Listed by Moreland Properties
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Listing agent
— 4400 Island Ave —
Moreland Properties
(512) 480-0848
NMLS#: 1598647Get Pre-Approved Today
Schools
Schools serving 4400 Island Ave
School District:Austin Independent School District
| Name | Grades | Distance |
|---|---|---|
Highland Park Elementary School, Austin, TX 4900 Fairview Drive, Austin, TX 78731 | K-5 | 1 mi |
Lamar Middle School, Austin, TX 6201 Wynona Avenue, Austin, TX 78757 | 6-8 | 2.2 mi |
Mccallum High School 5600 Sunshine Drive, Austin, TX 78756 | 9-12 | 2.9 mi |
Disclaimer:
School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 4400 Island Ave
Tax History
Tax History for 4400 Island Ave
Year
Property Taxes
Change
Tax Assessment
Change
2025
$114,304
-5%
$5,585,378
-8%
2024
$119,755
19%
$6,042,676
32%
2022
$100,487
—
$4,579,397
-10%
2022
$100,487
1%
$5,088,149
11%
2021
$99,601
20%
$4,575,831
23%
2020
$83,130
-1%
$3,733,400
-5%
2020
$84,145
7%
$3,923,100
10%
2018
$78,622
5%
$3,579,370
—
2016
$75,098
-8%
$3,575,921
6%
2017
$81,490
16%
$3,367,430
10%
2015
$70,290
13%
$3,061,300
10%
2013
$62,319
—
$2,783,000
10%
2013
$62,319
—
$2,530,000
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 4400 Island Ave
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4400 Island Avenue, Austin, TX 78731 (MLS# 9276221) is a Single Family property with 5 bedrooms, 4 full bathrooms and 2 partial bathrooms. 4400 Island Avenue is currently listed for $6,500,000 and was received on July 01, 2026. Want to learn more about 4400 Island Avenue? Do you have questions about finding other Single Family real estate for sale in Austin? You can browse all Austin real estate or contact a Coldwell Banker agent to request more information.