4400 Island Ave, Austin TX 78731

Austin, TX 78731 | Island Mount Bonnell Shores

$6,250,000 $866/sqft ▼ $250,000 (3.8%)
5 Beds
6 Baths 4 Full, 2 Half
7,219 Sq Ft
1.601 Acres
1996 Built
3 Garage

About This Property

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.

Property Highlights

Waterfront Lake Austin · Canal Front, Lake Front
View Hill Country, Lake, River

Features

  • Bookcases
  • Breakfast Bar
  • Built-in Features
  • High Ceilings
  • Stone Counters
  • Crown Molding
  • Double Vanity
  • Entrance Foyer
  • French Doors
  • Interior Steps
  • Kitchen Island
  • Multiple Dining Areas
  • Multiple Living Areas
  • Pantry
  • Primary Bedroom on Main
  • Soaking Tub
  • Study/Home Office
  • Walk-In Closet(s)
  • Wet Bar

Location

Schools

School District Austin ISD
Elementary Highland Park
Middle School Lamar (Austin ISD)
High School McCallum

Property Details

Property Type Residential
Construction Masonry – All Sides
Roof Tile
Foundation Slab
Levels Two
Flooring Stone
Cooling Central Air
Heating Central, Natural Gas
Fireplace Living Room, Outside
Exterior Balcony, Boat Lift, Boat Slip, Boat Dock - Private, Private Yard
County Travis
MLS # 9276221
Garage 3 spaces (Attached)
Parking 6 spaces: Attached, Garage
Windows Window Treatments
Security Smoke Detector(s)

Lot, Outdoor & Utilities

Lot Features Trees-Large (Over 40 Ft), Waterfall
Patio & Porch Covered, Patio
Water Public
Sewer Public Sewer
Utilities Electricity Available, Natural Gas Available, Underground Utilities

HOA & Community

HOA Fee $3,000 /Annually
HOA Name Island at Mt. Bonnell
HOA Includes Common Area Maintenance
Community Features Gated

Mortgage Calculator

Estimate your monthly payment (PITI)

$
$
%
%
Est. Monthly Payment $0
Principal & Interest $0
Property Taxes $0
Home Insurance $0

* Estimate only. Does not include HOA fees, PMI, or other costs.
This property has HOA fees of $3,000/annually.

Tax Information

Annual Taxes (MLS) $114,304 (2026)
Assessed Value $5,585,378
Exemptions None

Sale Terms & Disclosures

Financing Accepted Cash, Conventional
Sale Type Standard
Possession Close Of Escrow, Funding

Listing History

MLS# 9276221 - Updated Oct 7, 2026 82 days
Sep 28, 2026 Price Change $6,250,000
Sep 13, 2026 Pending
Sep 11, 2026 Off Market
Jul 1, 2026 Listed Listing Courtesy of Moreland Properties - eric@​moreland.com $6,500,000

Frequently Asked Questions About 4400 Island Ave, Austin TX 78731

When was 4400 Island Ave, Austin TX 78731 built?

4400 Island Ave, Austin TX 78731 was built in 1996. It is masonry – all sides construction with 7,219 square feet on a 1.601 acre lot.

How much does 4400 Island Ave, Austin TX 78731 cost?

4400 Island Ave, Austin TX 78731 is listed for sale at $6,250,000. That is $866 per square foot.

How many bedrooms and bathrooms does 4400 Island Ave, Austin TX 78731 have?

4400 Island Ave, Austin TX 78731 has 5 bedrooms and 6 bathrooms (4 full, 2 half) with 7,219 square feet of living space.

What school district is 4400 Island Ave, Austin TX 78731 in?

4400 Island Ave, Austin TX 78731 is in the Austin ISD school district. Assigned schools include Highland Park (elementary), Lamar (Austin ISD) (middle), McCallum (high school).

Does 4400 Island Ave, Austin TX 78731 have an HOA?

Yes, 4400 Island Ave, Austin TX 78731 has an HOA fee of $3,000 per annually. The HOA includes common area maintenance.

What are the property taxes on 4400 Island Ave, Austin TX 78731?

The annual property taxes on 4400 Island Ave, Austin TX 78731 are $114,304 (as of 2026). The tax assessed value is $5,585,378.

How big is the lot at 4400 Island Ave, Austin TX 78731?

The lot at 4400 Island Ave, Austin TX 78731 is 1.601 acres, and the home has 7,219 square feet of living space.

What type of property is 4400 Island Ave, Austin TX 78731?

4400 Island Ave, Austin TX 78731 is a residential property on a slab foundation.

Does 4400 Island Ave, Austin TX 78731 have a garage?

Yes, 4400 Island Ave, Austin TX 78731 has a 3-car garage (attached). Parking features include attached, garage.

Is 4400 Island Ave, Austin TX 78731 waterfront?

Yes, 4400 Island Ave, Austin TX 78731 is a waterfront property on Lake Austin. Waterfront features include canal front, lake front.

What subdivision is 4400 Island Ave, Austin TX 78731 in?

4400 Island Ave, Austin TX 78731 is located in the Island At Mount Bonnell Shores subdivision in Austin, TX. Community features include gated.

How long was 4400 Island Ave, Austin TX 78731 on the market?

4400 Island Ave, Austin TX 78731 was on the market for 82 days, listed on July 1, 2026.

What heating and cooling does 4400 Island Ave, Austin TX 78731 have?

4400 Island Ave, Austin TX 78731 has central, natural gas heating and central air cooling.

What are the roof and foundation at 4400 Island Ave, Austin TX 78731?

The listing reports a tile roof and a slab foundation at 4400 Island Ave, Austin TX 78731.

What financing does the seller of 4400 Island Ave, Austin TX 78731 accept?

The listing says the seller accepts cash, conventional financing.

Similar Properties

Browse More Properties

Request Tour

Contact Agent

Interested in this property?

Get more information or schedule a tour

By submitting this form, you consent to receive communications from Neuhaus Realty Group via phone, email, or text regarding your property inquiry. You may opt out at any time. Your information will not be shared. See our Privacy Policy.