Big Sky Medical Grows San Antonio MOB Portfolio

Brought online by Casey Development, the facility rises four stories.

Sunset at Treeline medical office building
Sunset at Treeline medical office building is currently fully occupied. Image courtesy of CommercialEdge

Big Sky Medical has acquired Sunset at Treeline, a 58,000-square-foot medical office building in San Antonio, with the aid of an acquisition loan issued by Bank of America, Bexar County records show. According to CommercialEdge, Casey Development was the previous owner of the Class A asset.

Development of the property was first announced in 2018, with GRG Architecture designing the building, which came online a year later.

The project initially landed an $11.7 million construction loan provided by American Momentum Bank, which later in 2020, originated another $17.2 million in financing. The property was also subject to a $19.7 million loan, provided in 2022 by First United Bank and Trust Co., CommercialEdge shows.


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Rising four stories, the facility features 17,460-square-foot floorplates, two passenger elevators, controlled access, on-site rooftop deck and includes 290 car parking spaces.

Sunset at Treeline is currently fully occupied and anchored by Baptist Health System Physicians and WellMed, a United Healthcare subsidiary. Medical services provided include OB/GYN, orthopedics and cardiology.

Located at 430 W. Sunset Road in the Alamo Heights neighborhood, Sunset at Treeline has access to U.S. Route 281 and Interstate 410. Downtown San Antonio is some 8 miles south of the property. Other medical providers in the surrounding area include CHRISTUS Santa Rosa Hospital, Molina Healthcare of Texas Regional Office and Village Square Medical Building, among others.

Big Sky Medical’s medical office building investments amount to $1.1 billion, boasting a portfolio totaling 3.1 million square feet in 17 states across the U.S.