South Austin - Halcyon Vault

US Oncology - South Austin completed a 1,180 sq ft renovation at 4101 James Casey Suite 100 in Austin, Texas. The project, filed under the name South Austin - Halcyon Vault, passed its final TDLR accessibility inspection in September 2026, confirming that construction is complete. This work involved the alteration of an existing medical office building in the South Manchaca neighborhood of Travis County.

The scope of work included the demolition and construction of non-loadbearing interior partitions, casework, ceilings, and finishes. The renovation also required modifications to the roof and mechanical, electrical, plumbing, and fire protection systems. The total estimated cost for this privately funded project was $375,000, which calculates to $318 per square foot.

RS&H served as the design firm of record for this project. Oswaldo Cajas was the registered accessibility specialist. The owner of record is Hcfd Austin, LTD. The project was registered with TDLR in January 2026, with plan review completed and construction starting in the same month. The scheduled build window was 63 days, which is shorter than the 98-day median for similar renovation projects in Travis County.

Project Context and Location

The estimated cost of $375,000 is above the county median of $298,196 for renovation and alteration filings. Similarly, the cost per square foot of $318 is above the county median of $103. The project size of 1,180 sq ft is smaller than the county median of 3,800 sq ft for comparable work.

The site is located in ZIP code 78745, where the U.S. Census Bureau reports a population of about 61,122 people and a median household income of $84,529. The area includes nearby businesses such as (512) Brewing Company, Gracie Humaitá Austin, and The Arts Apartments At South Austin. City of Austin permit records show eight permits issued at this street address between June 2025 and May 2026, including plumbing, mechanical, building, and electrical permits.

RS&H has been involved in six other TDLR-registered projects totaling $16,362,300, including work on Medtronic Fort Worth and Laredo International Airport. The Travis County unemployment rate was 3.9 percent in July 2026, according to FRED data.