Skip main navigation
Off market
  • $11,112,700

    3901 Island Knoll Dr, Austin, TX 78746

    5beds
    8,769sqft
    SingleFamily
    Built in 2014
    1.43 Acres Lot
    $11,112,700 Zestimate®
    $1,267/sqft
    $7,896 Estimated rent

    Home value

    $11,112,700

    $9.45M - $13.00M

    $7,896/mo

    Zestimate® history
    Loading
    Loading...

    Owner options

    List your home for rent

    $7,896/mo

    Rent Zestimate®

    Find your next renter with Zillow Rental Manager. Plus, with online applications, you can quickly screen prospective tenants – for free.

    Learn more

    $7,896/mo

    Rent Zestimate®

    Refinance and save

    $73,706/mo

    Est. payment

    Refinancing to a lower rate could help reduce your monthly payments and save thousands over the life of the loan.

    See today's rates

    $73,706/mo

    Est. payment

    Explore your selling options

    Work with a Zillow partner agent

    Leverage their expertise and Zillow's premium Showcase listings to get your home seen by more buyers.

    Get started

    List with your own agent

    Get your home in front of millions of buyers by listing it on Zillow.

    Learn how to do it

    Sell it yourself

    Take full control of how buyers see your home on Zillow by listing For Sale by Owner (FSBO).

    List your home

    What's special

    Set amidst manicured lawns and impeccable landscaping in the Island on Westlake, one of the most sought-after subdivisions, this spectacular Italian manor stands out among the Tuscany and Santa Barbara residences. A home perfect for both family and entertaining offers an indoor-outdoor lifestyle as it exudes an ambiance of relaxed sophistication. It has been curated by skilled craftspeople, utilizing the finest materials and custom elements to bring Castello Di Casole to Austin, Texas. The magic begins at the custom wood door resembling a castle entry, leading into the foyer and expansive living room with floor-to-ceiling windows. The interior is a celebration of spaciousness and light bestowed by an abundance of Fenestration custom metal windows and doors, Old World plaster, hand-laid stone, antique oak floors, Bourgogne Limestone, with accents of reclaimed beams sourced from the midwest. As it is in any home of this stature, the culinary center is not only essential but serves as a frequent hub of camaraderie. Features a La Cornue Château 150 in Carbon Fiber, Sub-Zero 36 Refrigerator/Freezer, Wolf Warming Drawer, Scotsman Gourmet Ice machine, two Asko dishwashers, Wolf 24-inch steam oven, all surrounded by custom Kingwood Cabinets with Honed Calcutta Manhattan Marble. Here, the kitchen opens to the family room and breakfast area, which, in turn, allows access to an expansive veranda overlooking the picturesque grounds. An entire wing of the home's entry-level is devoted to the primary suite with serene views of the pool and lake. The suite transports you back to the hills of Italy, with peaked ceilings with reclaimed beams, 16th Century Re-edition Custom Fireplace made by Formations USA, and Old World Plaster throughout. This one-of-a-kind home features a primary bath that bespoke serenity and peacefulness, allowing for the utmost relaxation as you soak in your Waterworks Voltaire Freestanding Oval Cast Iron Bathtub. Enter into the primary closet, to be met with a spiral staircase, lighted island, built-ins, and an expansive second-level. A true fairytale! The home's adjacent wing bestows a sense of refinement with antique Tuscan Chandeliers, Northern Italian Antique sconces, Antique Moroccan Chandeliers, and more. An office nook with calming views of the grounds, a secondary suite with a bathroom that delights the senses with custom-designed promenade sunflower matter solid concrete tile for walls, floors, and shower surround. The second level has three comfortable guest suites, all with custom design touches that enchant your guest. The upper kitchenette allows for entertainment and convenience, with a sink, dishwasher, sub-zero 24-inch refrigerator, and ice machine. This home is a true Faberge egg, with a lower level that mesmerizes--featuring a cigar/wine room, safe room, kitchenette, control room, office, theater/stage, display area, and exercise room. The control and theater room have been meticulously hand-selected by the homeowner, incorporating the highest software level. Perfection is evident as well on the grounds. Lush flora and cascading built-in pool grotto await you outside. No expense was spared in creating this oasis of visual delight! Take the winding stone pathway down to the lake to truly appreciate this hidden gem. Come see what magic awaits at the Italian Escape on Lake Austin!

    This property is off market, which means it's not currently listed for sale or rent on Zillow. This may be different from what's available on other websites or public sources.

    Facts & features

    Interior

    Bedrooms & bathrooms
    • Bedrooms: 5
    • Bathrooms: 8
    • Full bathrooms: 5
    • 1/2 bathrooms: 3
    • Main level bedrooms: 2
    Heating
    • Forced air, Electric, Gas
    Cooling
    • Central
    Appliances
    • Included: Dishwasher, Garbage disposal, Microwave, Range / Oven, Refrigerator
    Features
    • Wet Bar, Elevator, Pantry, Walk-In Closet(s), Cathedral Ceiling(s), Built-in Features, Entrance Foyer, Wired for Sound, Interior Steps, Multiple Dining Areas, Wine Room, Multiple Living Areas
    • Flooring: Hardwood
    • Has fireplace: Yes
    Interior area
    • Total interior livable area: 8,769 sqft

    Property

    Parking
    • Total spaces: 4
    • Parking features: Garage - Attached, Garage - Detached
    Features
    • Patio & porch: Patio, Porch, Covered
    • Exterior features: Stone, Stucco
    • Pool features: In Ground, Lap, Pool/Spa Combo, Waterfall
    • Has spa: Yes
    • Has view: Yes
    • View description: Water
    • Has water view: Yes
    • Water view: Water
    Lot
    • Size: 1.43 Acres
    • Features: Level, Cul-de-Sac, Many Trees, Waterfall, Sprinkler - Multiple Yards
    • Residential vegetation: Heavily Wooded, Trees-Large (Over 40 Ft)
    Details
    • Parcel number: 374864

    Construction

    Type & style
    • Home type: SingleFamily
    Materials
    • Foundation: Slab
    • Roof: Tile
    Condition
    • Year built: 2014

    Utilities & green energy

    • Utilities for property: Electricity Available, Natural Gas Available

    Community & HOA

    Community
    • Security: Fire Alarm, Smoke Detector(s), Security System Owned, Prewired
    HOA
    • Has HOA: Yes
    • HOA fee: $250 monthly
    Location
    • Region: Austin

    Financial & listing details

    • Price per square foot: $1,267/sqft
    • Tax assessed value: $8,926,156
    • Annual tax amount: $121,874

    Price history

    DateEventPrice
    6/16/2021Sold--
    Source: Agent Provided Report a problem
    4/14/2021Pending sale$15,000,000$1,711/sqft
    Source: Kuper Sotheby's International Realty #SYTRTT Report a problem
    4/2/2021Listed for sale$15,000,000-3.2%$1,711/sqft
    Source: Kuper Sotheby's International Realty #SYTRTT Report a problem
    11/24/2020Listing removed$15,500,000$1,768/sqft
    Source: Realty Austin #1376194 Report a problem
    8/23/2020Listed for sale$15,500,000+425.6%$1,768/sqft
    Source: Realty Austin #1376194 Report a problem
    8/30/2011Sold--
    Source: Agent Provided Report a problem
    8/23/2011Pending sale$2,949,000$336/sqft
    Source: Gottesman Windham Real Estate #4633251 Report a problem
    7/2/2011Price change$2,949,000-1.5%$336/sqft
    Source: Gottesman Windham Real Estate #4633251 Report a problem
    6/9/2011Price change$2,995,000-4.9%$342/sqft
    Source: Gottesman Windham Real Estate #4633251 Report a problem
    2/5/2011Price change$3,150,000-36.9%$359/sqft
    Source: Gottesman Windham Real Estate #4633251 Report a problem
    10/31/2010Price change$4,990,000+53.5%$569/sqft
    Source: Gottesman Windham Real Estate #4633251 Report a problem
    8/6/2010Price change$3,250,000-6.9%$371/sqft
    Source: Gottesman Windham Real Estate #4633251 Report a problem
    3/7/2010Price change$3,490,000-11.6%$398/sqft
    Source: Gottesman Windham Real Estate #5828123 Report a problem
    3/3/2010Price change$3,950,000-20.8%$450/sqft
    Source: Gottesman Windham Real Estate #5828123 Report a problem
    11/6/2009Price change$4,990,000+43%$569/sqft
    Source: Gottesman Windham Real Estate #5828123 Report a problem
    7/19/2009Price change$3,490,000-11.6%$398/sqft
    Source: Gottesman Windham Real Estate #5617744 Report a problem
    2/19/2009Listed for sale$3,950,000-7.1%$450/sqft
    Source: Listhub #5617744 Report a problem
    1/16/2009Listing removed$4,250,000$485/sqft
    Source: Listhub #5617744 Report a problem
    12/7/2008Listed for sale$4,250,000$485/sqft
    Source: Listhub #5617744 Report a problem

    Public tax history

    YearProperty taxesTax assessment
    2025$121,874 -3.7%$8,926,156 -3%
    2024$126,583 -19.3%$9,197,692 -22.2%
    2023$156,905 -11.2%$11,825,617 -12.2%
    2022$176,663 $13,476,301 +78.5%
    2021-- $7,551,600 +10%
    2020$116,162 +7.5%$6,865,091
    2019$108,070 +34.9%$6,865,091 -17.9%
    2018$80,128 $8,359,262 +81.5%
    2017$80,128 +97.3%$4,606,400 +36.9%
    2016$40,618 $3,365,354 +10.1%
    2015$40,618 $3,055,906 +39.5%
    2014$40,618 $2,191,113 +67.9%
    2013-- $1,305,000 -49.4%
    2012-- $2,577,780 +80%
    2011-- $1,432,376
    2010-- $1,432,376
    2009-- $1,432,376 -0.8%
    2008-- $1,444,138 +33%
    2007-- $1,085,961 -0.4%
    2006-- $1,089,911 +93.9%
    2005-- $561,976
    Find assessor info on the county website

    Neighborhood: 78746

    Nearby schools

    GreatSchools rating
    Schools provided by the listing agent
    • Elementary: Bridge Point
    • Middle: Hill Country
    • High: Westlake
    • District: Eanes ISD

    Source: The MLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

    Get a cash offer in 3 minutes
    Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
    Estimated market value
    $11,112,700
    Get a cash offer in 3 minutes
    Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
    Estimated market value
    $11,112,700