Mr. Home Search
ActiveMLS #9276221

4400 Island Ave, Austin TX 78731

Austin, TX 78731 · Island At Mount Bonnell Shores

Single Family Residence for sale in Island At Mount Bonnell Shores

5Bedrooms
4 full / 2 halfBathrooms
7,219Square Ft
1.60Acres
3Garage
1996Year Built
Back on Market
1 / 40
$6,500,000

Overview

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.

Financial Info
Price
$6,500,000
$ / Sqft
$900
HOA
Yes - Mandatory / $3,000 / Annually
HOA Name
Island at Mt. Bonnell
HOA Includes
Common Area Maintenance
Tax Rate
2.046485%
Est. Taxes
$114,303.92
Tax Year
2026
Exemptions
None
Legal Info
Address
4400 Island Ave
County
Travis
City
Austin
State
TX
Zip
78731
Subdivision
Island At Mount Bonnell Shores
Legal Description
LOT 1-A BLK B ISLAND AT MT BONNELL SHORES THE AMENDED PLAT OF LOTS 1&2
Parcel
01290705100000
Interior Features
Floor
Stone
Num Living
4
Dining
2
Kitchen
Breakfast Bar, Kitchen Island, Pantry
Appliances
Built-In Oven(s), Dishwasher, Disposal, Gas Cooktop, Double Oven, Refrigerator, Stainless Steel Appliance(s)
Laundry
Laundry Room, Main Level
Master Bed
Double Vanity, Primary Bedroom on Main, Walk-In Closet(s)
Master Main
Yes
Fireplaces
2
Fireplace Description
Living Room, Outside
Interior 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, Smoke Detector(s), Window Treatments
General Info
Beds
5 Total / 1 Main Level / 4 Other Level
Full / Half Baths
4 / 2
Prop Type
Residential
Property Type
Single Family Residence
Stories
2
Year Built
1996 / Resale
Square Feet
7,219 / Public Records
Garages
3
Garage Desc
Attached, Garage
Foundation
Slab
Roof
Tile
Construction
Masonry – All Sides
Acres
1.60
Lot Description
Trees-Large (Over 40 Ft), Waterfall
Restrictions
Deed Restrictions, Development Type
Flood Plain
Yes-500 yr
View
Hill Country, Lake, River
Water Access
Yes
Waterfront
Yes
Area
1B
Utility Info
Water
Public
Sewer
Public Sewer
Utilities
Electricity Available, Natural Gas Available, Underground Utilities
Heat
Central, Natural Gas
A C
Central Air
Exterior Features
Fence
None
Exterior Features
Balcony, Boat Lift, Boat Slip, Boat Dock - Private, Private Yard, Covered, Patio
Pool On Property
No
Area Amenities
Gated

Price history

Members only
Days on market
$6,500,000
List price
0
Price reductions
Active
Since Jul 1, 2026
Property history3 events
DateEventPriceChange
Sep 18, 2026Back On Market
Sep 13, 2026Active Under Contract
Jul 1, 2026New Listing

Taxes

Tax data isn’t available for this property’s county yet.

Schools

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

Maps

Financing

Your preferences

  • 20% down
  • Conv/Jumbo
  • 30 years
  • 6.50% rate

Saved on this device

List price $6,500,000
Down payment
Stays 20% if you change the price
Note rate, not APR
From this listing’s tax record
*Estimated only (1% of price / yr)

Estimated monthly payment

$47,810 / mo

20% down · 6.50% interest · 30-year fixed

Estimated monthly payment $47,810

Principal & interest
$32,868
Property taxes
$9,525
Homeowners insurance
$5,417

*PITI only

These figures are estimates for general information only — not a loan offer, a quote, or a guarantee of financing terms.

Principal, interest and balance for each year
YearStarting balancePrincipal paidInterest paidEnding balancePrincipal vs interest
1$5,200,000$58,122$336,289$5,141,878
2$5,141,878$62,014$332,396$5,079,864
3$5,079,864$66,167$328,243$5,013,697
4$5,013,697$70,599$323,812$4,943,098
5$4,943,098$75,327$319,084$4,867,771
6$4,867,771$80,372$314,039$4,787,399
7$4,787,399$85,754$308,656$4,701,645
8$4,701,645$91,497$302,913$4,610,147
9$4,610,147$97,625$296,785$4,512,522
10$4,512,522$104,163$290,247$4,408,359
  • Year 1$5,141,878
    Principal paid
    $58,122
    Interest paid
    $336,289
    Starting balance
    $5,200,000
  • Year 2$5,079,864
    Principal paid
    $62,014
    Interest paid
    $332,396
    Starting balance
    $5,141,878
  • Year 3$5,013,697
    Principal paid
    $66,167
    Interest paid
    $328,243
    Starting balance
    $5,079,864
  • Year 4$4,943,098
    Principal paid
    $70,599
    Interest paid
    $323,812
    Starting balance
    $5,013,697
  • Year 5$4,867,771
    Principal paid
    $75,327
    Interest paid
    $319,084
    Starting balance
    $4,943,098
  • Year 6$4,787,399
    Principal paid
    $80,372
    Interest paid
    $314,039
    Starting balance
    $4,867,771
  • Year 7$4,701,645
    Principal paid
    $85,754
    Interest paid
    $308,656
    Starting balance
    $4,787,399
  • Year 8$4,610,147
    Principal paid
    $91,497
    Interest paid
    $302,913
    Starting balance
    $4,701,645
  • Year 9$4,512,522
    Principal paid
    $97,625
    Interest paid
    $296,785
    Starting balance
    $4,610,147
  • Year 10$4,408,359
    Principal paid
    $104,163
    Interest paid
    $290,247
    Starting balance
    $4,512,522
First 10 of 30 years

Nearby

Courtesy of Moreland Properties · (512) 480-0848

Listings courtesy of ACTRIS as distributed by MLS GRID.