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- 5 Beds
- 6 Baths
- 8,526 Sqft
- 1.6 Acres
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4400 Island Avenue
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.
Essential Information
- MLS® #9276221
- Price$6,500,000
- Bedrooms5
- Bathrooms6.00
- Full Baths4
- Half Baths2
- Square Footage8,526
- Acres1.60
- Year Built1996
- TypeResidential
- Sub-TypeSingle Family Residence
- StatusActive
Community Information
- Address4400 Island Avenue
- SubdivisionIsland At Mount Bonnell Shores
- CityAustin
- CountyTravis
- StateTX
- Zip Code78731
Amenities
- FeaturesGated
- ParkingAttached, Garage
- # of Garages3
- ViewHills, Lake, River
- Is WaterfrontYes
Utilities
Electricity Available, Natural Gas Available, Underground Utilities
Waterfront
Boat Ramp/Lift Access, Canal Front, Lake Front
Interior
- InteriorStone
- HeatingCentral, Natural Gas
- FireplaceYes
- # of Fireplaces2
- FireplacesLiving Room, Outside
- # of Stories2
- StoriesTwo
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, Soaking Tub, Study, Walk-In Closet(s), Stone Counters
Appliances
Built-In Oven, Dishwasher, Gas Cooktop, Disposal, Refrigerator, Stainless Steel Appliance(s), Double Oven
Exterior
- Lot DescriptionTrees Large Size, Waterfall
- RoofTile
- ConstructionMasonry
- FoundationSlab
Exterior Features
Balcony, Private Yard, Boat Lift, Boat Slip, Dock
School Information
- DistrictAustin ISD
- ElementaryHighland Park
- MiddleLamar (Austin ISD)
- HighMcCallum
Listing Details
- Contact Details(512) 480-0848
Property Listed by: Moreland Properties
The information being provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Based on information from the Austin Board of REALTORS® (alternatively, from ACTRIS) from August 9th, 2026 at 11:46am CDT. Neither the Board nor ACTRIS guarantees or is in any way responsible for its accuracy. The Austin Board of REALTORS®, ACTRIS and their affiliates provide the MLS and all content therein "AS IS" and without any warranty, express or implied. Data maintained by the Board or ACTRIS may not reflect all real estate activity in the market.
All information provided is deemed reliable but is not guaranteed and should be independently verified.
