4400 Island Ave, Austin, TX, 78731
About This Home
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.
Getting Around
Car-Dependent
No Nearby Transit
Somewhat BikeableSchools
Construction
Condition
- Property condition: Resale
- Year built: 1996
Materials
- Foundation: Slab
- Roof: Tile
Type & Style
- Home type: SingleFamily
- Property subType: Single Family Residence
Interior
Appliances
- Appliances included: Built-In Oven(s),Dishwasher,Disposal,Gas Cooktop,Double Oven,Refrigerator,Stainless Steel Appliance(s)
Bedrooms & Bathrooms
- Bedrooms: 5
- Bathrooms: 6
- Full bathrooms: 4
- 1/2 bathrooms: 2
- Main level bedrooms: 1
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
- Window features: Window Treatments
- Flooring: Stone
- Number of fireplaces: 2
- Fireplace features: Living Room,Outside
Heating & Cooling
- Heating features: Central,Natural Gas
- Cooling features: Central Air
Interior Area
- Total interior livable area: 7,219 sqft
Property
Accessibility
- Accessibility features: None
Details
- Parcel number: 01290705100000
- Special condition: Standard
Features
- Levels: Two
- Stories: 2
- Pool features: None
- Patio & porch: Covered,Patio
- Exterior features: Balcony,Boat Lift,Boat Slip,Boat Dock - Private,Private Yard
- Spa features: None
- Fencing: None
- Has view: Yes
- View description: Hill Country,Lake,River
- Has water view: Yes
- Water view: Lake,River
- On waterfront: Yes
- Waterfront features: Canal Front,Lake Front
- Waterbody name: Lake Austin
Lot
- Lot size: 1.60 Acres
- Features: Trees-Large (Over 40 Ft),Waterfall
Parking
- Total spaces: 3
- Parking features: Attached,Garage
- Has garage: Yes
- Attached garage spaces: 3
- Covered spaces: 3
Climate Risk is Financial Risk
Every home has a financial story beyond the listing price. Below, you’ll see the climate risks that could affect this property — and in Bills & Affordability, how those risks may influence repairs, insurance, utilities, and long-term value.
Biggest Threats for This Home
- Hail
- Heat Wave
- Inland Flooding
- Tornado
How This Home’s Risks Compare
FEMA Declared Disasters Across Texas Counties
Understanding the Costs
Financial advisors generally recommend spending no more than 30% of your gross household income on housing costs. In practice, many households stretch to 35% or beyond — especially in high-cost markets.
Estimated Costs Today
| Monthly | Annual | |
|---|---|---|
| Mortgage | $32,867 | $394,404 |
| Home Insurance * | $1,938 | $23,256 |
| Property Taxes | $11,076 | $132,912 |
| Electricity | $792 | $9,512 |
| Total | $46,673 | $560,076 |
Income You'd Need if You Spent...
Texas FAIR Plan Programs
How Costs Could Change Over Time
Climate risk is quickly impacting all of the major home ownership costs. Adjust the growth rates and percentage of income spent on housing below to see how your housing costs could change over the next 10 years — and what income you'd need to keep up.
Comparing Against the Market
Price Per Sq Ft
vs Other Active Listings
Avg $/sqft
vs Homes Sold Last Month
Median $/sqft
Current Market Trends
Median Price Per Square Foot
The median price per square foot of homes sold in this area each month. Compare this to this listing's price per square foot to gauge whether the home is priced in line with recent sales.
Historicals for This Listing
Zestimate History ($/sqft)
Price History
| Date | Event | Price |
|---|---|---|
| 2026-07-01 | Listed for sale | $6,500,000 |
| 2022-12-26 | Listing removed | -- |
| 2022-12-05 | Listed for rent | $10,000 |
| 2020-12-28 | Sold | -- |
| 2020-12-03 | Pending sale | $4,500,000 |
| 2020-08-15 | Price change | $4,500,000 |
| 2020-03-25 | Listed for sale | $4,990,000 |
| 2019-10-11 | Listing removed | $4,995,000 |
| 2019-07-15 | Pending sale | $4,995,000 |
| 2019-06-12 | Price change | $4,995,000 |
| 2018-10-18 | Price change | $5,650,000 |
| 2018-08-31 | Listed for sale | $6,295,000 |
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