Sounds like a snow job by Austin realtors and developers trying to drum up prices and commissions.
It's snobby moonbat environmental preservation, historical preservation, and zoning restrictions artificially constraining the amount of land available for new development and limiting what can be done with existing properties.
In the town next door, developers are demolishing structurally sound 1,000 sq ft ranch houses, 1,200 sq ft row houses, and 1,600 sq ft cape houses on 1/4 acre or smaller lots to build 2,000 sq ft + colonial houses.
The bigger houses on exisitng lots are necessary to recover the cost of the lot, and still allow for a profit. An existing lot and house will be purchased for $400,000 - $600,000, redeveloped with a new larger home, and sold for $1,250,000 or more.
Rising home values means higher property taxes. Many poor, working, retired, and elderly persons can no longer afford to live in the town. Firefighters and police are allowed to live in nearby towns because they cannot afford to live in the town for which they work.
Elitist limousine liberalism is to blame for economic disparities in the Boston metro area.