Westsider page top block No. 09

Vol. 1 · No. 09 · October 2026Field notes from the west side of AustinLake TravisHighway 71West Austin

The Westsider: field notes from the west side of Austin, by Diana Roberts

Illustration, not to scale: limestone hills with homes west of the Balcones Fault, and the same rock layers lower on the east under deep clay, with a buried volcano below

Cover story · No. 09 · October 2026

Rock solid. A head start, west of Austin.

Austin’s fault line has been quiet for about 20 million years, and it left the west side of Austin up on limestone. Why that gives a home a head start, and what I still check on every address.

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By Diana Roberts · Austin Real Estate Advisor · Compass

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Diana Roberts 10/30/26 Diana Roberts 10/30/26

Rock Solid: Why the Ground West of Austin Gives a Home a Head Start

Yes, Austin has a fault line, and it has been quiet for about 20 million years. It is also why the west side of Austin sits on limestone, which gives a home a head start. What I still check on every lot: slope, drainage, rock and the flood map.