— bed, — bath on 5.93 acres in Austin. Austin, TX 78731. $8,490,000. Austin ISD.
Perched atop one of the most iconic elevations in Central Austin, The Ridge at Mount Bonnell presents a rare opportunity to craft a world-class estate on nearly six acres of private, blufftop land. With panoramic views over Lake Austin and a front-row seat to the Pennybacker Bridge, this one-of-a-kind homesite offers a setting that’s as awe-inspiring as it is exclusive.
Located within minutes of Austin’s best shopping, dining, and entertainment—yet wrapped in natural serenity—4323 Mount Bonnell Road invites you to build a home that is both a personal retreat and a bold architectural statement. Included in the offering are conceptual plans by globally acclaimed architect Tom Kundig, whose work is celebrated for its seamless integration with the land. His vision here imagines a sculptural modern residence that disappears into the cliffside while maximizing light, privacy, and views.
This is more than a homesite—it’s a legacy property in one of Austin’s most historically significant and sought-after locations. Whether you realize the Kundig vision or bring your own design team, the result will be something truly singular: a custom home at the apex of Austin, surrounded by nature, overlooking the water, and unlike anything else on the market.
There are many beautiful spots in Austin. There is only one Mount Bonnell.
At 4323 Mount Bonnell Road in the Austin subdivision, you're buying nearly six acres of unimproved land at one of Central Austin's highest elevations, with panoramic views across Lake Austin and direct sightlines to the Pennybacker Bridge. This is raw potential for a custom estate that functions as both private retreat and architectural landmark.
The location sits in the Austin Independent School District, placing it within reach of schools serving the 78731 zip code while maintaining the isolation and privacy that makes Mount Bonnell distinctive. Minutes away, you have access to the shopping and dining density of the surrounding neighborhoods, but the property itself feels removed from that bustle. The Ridge at Mount Bonnell is designed for people who want weekend activities without leaving their own land. The five-acre-plus footprint supports multiple use cases: hiking trails across your own terrain, space for a guest house or recreational structures, or simply building one significant primary residence with room to spare.
The bluff location creates natural boundaries and dramatic topography. You're looking at land that integrates with the landscape rather than requiring extensive grading. The Kundig architecture concept included with the offering shows how a modern residence can work with the cliff face rather than against it, maximizing lake views and natural light while anchoring into the slope. If you choose to build, you have a proven design framework from a globally recognized architect, or you can commission your own vision entirely.
Mount Bonnell itself is historically significant Austin terrain. The road runs along some of the city's most valuable land, and this particular parcel captures the summit positioning without the density of closer-in neighborhoods. You get the views and elevation that define Mount Bonnell's character, the privacy of an unimproved homesite, and the development flexibility that comes with raw land in a premium location.
At $8.49 million for 5.93 acres, this is a land play in one of Austin's most stable, recognizable locations. Whether you build immediately or hold the property as a long-term legacy asset, the scarcity and elevation work in your favor. There is truly only one Mount Bonnell.
Keenan Luxury Market Index: $5M-$10M single-family homes across the Austin area sold at a median $990 per sq ft over the trailing 12 months (44 sales), as of October 15, 2026.
Verified property facts
4323 Mt Bonnell Rd is listed at $8,490,000 with 0 bedrooms, 5.93-acre lot. This places it above the ZIP 78731 single-family closed-sale median price of $1,209,000 (ZIP 78731 geography · single-family closed sales · median sale price · trailing 12 months as of Oct 15, 2026).
4323 Mt Bonnell Rd is zoned for Austin ISD with assigned schools: Highland Park (elementary), Lamar (Austin ISD) (middle), McCallum (high). School assignments should be verified directly with the district.
The most recent annual property tax for 4323 Mt Bonnell Rd is $10. Texas has no state income tax, so property taxes are a primary revenue source. Rates vary by jurisdiction and exemptions. Verify current amounts with the county appraisal district.
This page does not assume a mortgage rate or publish a monthly payment for 4323 Mt Bonnell Rd. A property-specific estimate requires a current lender rate, chosen down payment, taxes, insurance, and any verified association dues.
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Listing information last updated March 16, 2026.
Listed by Kuper Sotheby's Int'l Realty
MLS# 1967428 • Active
IDX inquiries: Keenan Group at Compass · (512) 415-7653
1 record on file
Every recorded listing, sale, and lease at 4323 Mt Bonnell Rd, whoever represented it.
Prices shown are list prices. Closed sale prices are available to registered clients in accordance with ACTRIS rules.
Listing timeline with current price, original ask, and market time.
Public record data from county appraisal records. Market value can differ from assessed value.
| Year | Taxes | Total Assessment | Land | Additions |
|---|---|---|---|---|
2025-100.0% | — | $525 | — | — |
2021 | — | $1,500,000 | $1,500,000 | — |

Zoned assignments come from the property school fields available to us. District context schools are shown only when an assigned tier is missing. Contact the school district directly to verify current boundaries and enrollment eligibility.
Excluded from this estimate: property taxes, home insurance, and HOA dues. Each requires verified amount, cadence or unit, source, and as-of details.
20% ($1.7M)
Adjustable assumption - not a lending recommendation.
$8,490,000
Luxury property intelligence
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List price
$8,490,000
Price per sqft
Not available
Vs. Neighborhood guide reference price
Not available
Days on market
329 days
Original to current
No verified reduction
$8.5M original
Active inventory context
Ask for current inventory
Source: MLS Grid / Unlock MLS and Keenan Group review as of Oct 15, 2026.
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#1 ABOR Team 2024 with $1B+ career sales volume
As of Oct 15, 2026, 4323 Mt Bonnell Rd is offered at $8,490,000. The current MLS snapshot shows 58 active listings in 78731. Keenan Group has completed 91 verified transactions in 78731 within its 1,000+ completed transactions and $1B+ career volume across Austin.
Answers use visible listing facts, school context, and neighborhood data available on this page. Verify time-sensitive details before making decisions.
Homes sold by Keenan Group.
5 events on record
Current Price
$8,490,000
Timeline data compiled from MLS records and public records. Information deemed reliable but not guaranteed.
| Year | Taxes | Total Assessment | Land | Additions |
|---|---|---|---|---|
2025-100.0% | — | $525 | — | — |
2021 | — | $1,500,000 | $1,500,000 | — |
Timeline merges MLS activity (when permitted) with public records. Some details may be restricted to registered VOW clients.
| Address | Offered At |
|---|---|
| 3802 Balcones DR | $10.00M |
Car-Dependent
Minimal Transit
Somewhat Bikeable
Walk Score measures walkability based on distance to amenities. Transit Score measures public transportation access. Bike Score measures bikeability based on bike infrastructure and terrain.
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